STM32L412 1.9 STM32L412 CM4 r0p1 little true true 4 false 8 32 0x20 0x00000000 0xFFFFFFFF ADC1 Analog-to-Digital Converter ADC 0x50040000 0x0 0xB9 registers ADC1_2 ADC1 and ADC2 global interrupt 18 ISR ISR ADC interrupt and status register 0x0 0x20 0x00000000 0xFFFFFFFF ADRDY ADC ready This bit is set by hardware after the ADC has been enabled (bit ADEN = 1) and when the ADC reaches a state where it is ready to accept conversion requests. It is cleared by software writing 1 to it. 0 1 read-write oneToClear ADRDYR read NotReady ADC is not ready to start conversion 0 Ready ADC is ready to start conversion 1 ADRDYW write Clear Clear ADC is ready to start conversion flag 1 EOSMP End of sampling flag This bit is set by hardware during the conversion of any channel (only for regular channels), at the end of the sampling phase. 1 1 read-write oneToClear EOSMPR read NotEnded End of sampling phase no yet reached 0 Ended End of sampling phase reached 1 EOSMPW write Clear Clear end of sampling phase reached flag 1 EOC End of conversion flag This bit is set by hardware at the end of each regular conversion of a channel when a new data is available in the ADC_DR register. It is cleared by software writing 1 to it or by reading the ADC_DR register 2 1 read-write oneToClear EOCR read NotComplete Regular conversion is not complete 0 Complete Regular conversion complete 1 EOCW write Clear Clear regular conversion complete flag 1 EOS End of regular sequence flag This bit is set by hardware at the end of the conversions of a regular sequence of channels. It is cleared by software writing 1 to it. 3 1 read-write oneToClear EOSR read NotComplete Regular sequence is not complete 0 Complete Regular sequence complete 1 EOSW write Clear Clear regular sequence complete flag 1 OVR ADC overrun This bit is set by hardware when an overrun occurs on a regular channel, meaning that a new conversion has completed while the EOC flag was already set. It is cleared by software writing 1 to it. 4 1 read-write oneToClear OVRR read NoOverrun No overrun occurred 0 Overrun Overrun occurred 1 OVRW write Clear Clear overrun occurred flag 1 JEOC Injected channel end of conversion flag This bit is set by hardware at the end of each injected conversion of a channel when a new data is available in the corresponding ADC_JDRy register. It is cleared by software writing 1 to it or by reading the corresponding ADC_JDRy register 5 1 read-write oneToClear JEOCR read NotComplete Injected conversion is not complete 0 Complete Injected conversion complete 1 JEOCW write Clear Clear injected conversion complete flag 1 JEOS Injected channel end of sequence flag This bit is set by hardware at the end of the conversions of all injected channels in the group. It is cleared by software writing 1 to it. 6 1 read-write oneToClear JEOSR read NotComplete Injected sequence is not complete 0 Complete Injected sequence complete 1 JEOSW write Clear Clear Injected sequence complete flag 1 3 0x1 1-3 AWD%s Analog watchdog %s flag 7 1 read-write oneToClear AWD1R read NoEvent No analog watchdog event occurred 0 Event Analog watchdog event occurred 1 AWD1W write Clear Clear analog watchdog event occurred flag 1 JQOVF Injected context queue overflow This bit is set by hardware when an Overflow of the Injected Queue of Context occurs. It is cleared by software writing 1 to it. Refer to Section 16.4.21: Queue of context for injected conversions for more information. 10 1 read-write oneToClear JQOVFR read NoOverflow No injected context queue overflow has occurred 0 Overflow Injected context queue overflow has occurred 1 JQOVFW write Clear Clear injected context queue overflow flag 1 IER IER ADC interrupt enable register 0x4 0x20 0x00000000 0xFFFFFFFF ADRDYIE ADC ready interrupt enable This bit is set and cleared by software to enable/disable the ADC Ready interrupt. Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 0 1 read-write ADRDYIE Disabled ADC ready interrupt disabled 0 Enabled ADC ready interrupt enabled 1 EOSMPIE End of sampling flag interrupt enable for regular conversions This bit is set and cleared by software to enable/disable the end of the sampling phase interrupt for regular conversions. Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 1 1 read-write EOSMPIE Disabled End of regular conversion sampling phase interrupt disabled 0 Enabled End of regular conversion sampling phase interrupt enabled 1 EOCIE End of regular conversion interrupt enable This bit is set and cleared by software to enable/disable the end of a regular conversion interrupt. Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 2 1 read-write EOCIE Disabled End of regular conversion interrupt disabled 0 Enabled End of regular conversion interrupt enabled 1 EOSIE End of regular sequence of conversions interrupt enable This bit is set and cleared by software to enable/disable the end of regular sequence of conversions interrupt. Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 3 1 read-write EOSIE Disabled End of regular sequence interrupt disabled 0 Enabled End of regular sequence interrupt enabled 1 OVRIE Overrun interrupt enable This bit is set and cleared by software to enable/disable the Overrun interrupt of a regular conversion. Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 4 1 read-write OVRIE Disabled Overrun interrupt disabled 0 Enabled Overrun interrupt enabled 1 JEOCIE End of injected conversion interrupt enable This bit is set and cleared by software to enable/disable the end of an injected conversion interrupt. Note: The software is allowed to write this bit only when JADSTART = 0 (which ensures that no injected conversion is ongoing). 5 1 read-write JEOCIE Disabled End of injected conversion interrupt disabled 0 Enabled End of injected conversion interrupt enabled 1 JEOSIE End of injected sequence of conversions interrupt enable This bit is set and cleared by software to enable/disable the end of injected sequence of conversions interrupt. Note: The software is allowed to write this bit only when JADSTART = 0 (which ensures that no injected conversion is ongoing). 6 1 read-write JEOSIE Disabled End of injected sequence interrupt disabled 0 Enabled End of injected sequence interrupt enabled 1 3 0x1 1-3 AWD%sIE Analog watchdog %s interrupt enable 7 1 read-write AWD1IE Disabled Analog watchdog interrupt disabled 0 Enabled Analog watchdog interrupt enabled 1 JQOVFIE Injected context queue overflow interrupt enable This bit is set and cleared by software to enable/disable the Injected Context Queue Overflow interrupt. Note: The software is allowed to write this bit only when JADSTART = 0 (which ensures that no injected conversion is ongoing). 10 1 read-write JQOVFIE Disabled Injected context queue overflow interrupt disabled 0 Enabled Injected context queue overflow interrupt enabled 1 CR CR ADC control register 0x8 0x20 0x20000000 0xFFFFFFFF ADEN ADC enable control This bit is set by software to enable the ADC. The ADC is effectively ready to operate once the flag ADRDY has been set. It is cleared by hardware when the ADC is disabled, after the execution of the ADDIS command. Note: The software is allowed to set ADEN only when all bits of ADC_CR registers are 0 (ADCAL = 0, JADSTART = 0, ADSTART = 0, ADSTP = 0, ADDIS = 0 and ADEN = 0) except for bit ADVREGEN which must be 1 (and the software must have wait for the startup time of the voltage regulator) 0 1 read-write oneToSet ADENR read Disabled ADC disabled 0 Enabled ADC enabled 1 ADENW write Enabled Enable the ADC 1 ADDIS ADC disable command This bit is set by software to disable the ADC (ADDIS command) and put it into power-down state (OFF state). It is cleared by hardware once the ADC is effectively disabled (ADEN is also cleared by hardware at this time). Note: The software is allowed to set ADDIS only when ADEN = 1 and both ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing) 1 1 read-write oneToSet ADDISR read NotDisabling No disable command active 0 Disabling ADC disabling 1 ADDISW write Disable Disable the ADC 1 ADSTART ADC start of regular conversion This bit is set by software to start ADC conversion of regular channels. Depending on the configuration bits EXTEN[1:0], a conversion starts immediately (software trigger configuration) or once a regular hardware trigger event occurs (hardware trigger configuration). It is cleared by hardware: in single conversion mode when software trigger is selected (EXTSEL = 0x0): at the assertion of the End of Regular Conversion Sequence (EOS) flag. in all cases: after the execution of the ADSTP command, at the same time that ADSTP is cleared by hardware. Note: The software is allowed to set ADSTART only when ADEN = 1 and ADDIS = 0 (ADC is enabled and there is no pending request to disable the ADC) Note: In auto-injection mode (JAUTO = 1), regular and auto-injected conversions are started by setting bit ADSTART (JADSTART must be kept cleared) 2 1 read-write oneToSet ADSTARTR read NotActive No conversion ongoing 0 Active ADC operating and may be converting 1 ADSTARTW write StartConversion Start the ADC conversion (may be delayed for hardware triggers) 1 JADSTART ADC start of injected conversion This bit is set by software to start ADC conversion of injected channels. Depending on the configuration bits JEXTEN[1:0], a conversion starts immediately (software trigger configuration) or once an injected hardware trigger event occurs (hardware trigger configuration). It is cleared by hardware: in single conversion mode when software trigger is selected (JEXTSEL = 0x0): at the assertion of the End of Injected Conversion Sequence (JEOS) flag. in all cases: after the execution of the JADSTP command, at the same time that JADSTP is cleared by hardware. Note: The software is allowed to set JADSTART only when ADEN = 1 and ADDIS = 0 (ADC is enabled and there is no pending request to disable the ADC). Note: In auto-injection mode (JAUTO = 1), regular and auto-injected conversions are started by setting bit ADSTART (JADSTART must be kept cleared) 3 1 read-write oneToSet read write ADSTP ADC stop of regular conversion command This bit is set by software to stop and discard an ongoing regular conversion (ADSTP Command). It is cleared by hardware when the conversion is effectively discarded and the ADC regular sequence and triggers can be re-configured. The ADC is then ready to accept a new start of regular conversions (ADSTART command). Note: The software is allowed to set ADSTP only when ADSTART = 1 and ADDIS = 0 (ADC is enabled and eventually converting a regular conversion and there is no pending request to disable the ADC). In auto-injection mode (JAUTO = 1), setting ADSTP bit aborts both regular and injected conversions (do not use JADSTP). 4 1 read-write oneToSet ADSTPR read NotStopping No stop command active 0 Stopping ADC stopping conversion 1 ADSTPW write StopConversion Stop the active conversion 1 JADSTP ADC stop of injected conversion command This bit is set by software to stop and discard an ongoing injected conversion (JADSTP Command). It is cleared by hardware when the conversion is effectively discarded and the ADC injected sequence and triggers can be re-configured. The ADC is then ready to accept a new start of injected conversions (JADSTART command). Note: The software is allowed to set JADSTP only when JADSTART = 1 and ADDIS = 0 (ADC is enabled and eventually converting an injected conversion and there is no pending request to disable the ADC) Note: In Auto-injection mode (JAUTO = 1), setting ADSTP bit aborts both regular and injected conversions (do not use JADSTP) 5 1 read-write oneToSet read write ADVREGEN ADC voltage regulator enable This bits is set by software to enable the ADC voltage regulator. Before performing any operation such as launching a calibration or enabling the ADC, the ADC voltage regulator must first be enabled and the software must wait for the regulator start-up time. For more details about the ADC voltage regulator enable and disable sequences, refer to Section 16.4.6: ADC Deep-power-down mode (DEEPPWD) and ADC voltage regulator (ADVREGEN). The software can program this bit field only when the ADC is disabled (ADCAL = 0, JADSTART = 0, ADSTART = 0, ADSTP = 0, ADDIS = 0 and ADEN = 0). 28 1 read-write ADVREGEN Disabled ADC Voltage regulator disabled 0 Enabled ADC Voltage regulator enabled 1 DEEPPWD Deep-power-down enable This bit is set and cleared by software to put the ADC in Deep-power-down mode. Note: The software is allowed to write this bit only when the ADC is disabled (ADCAL = 0, JADSTART = 0, JADSTP = 0, ADSTART = 0, ADSTP = 0, ADDIS = 0 and ADEN = 0). 29 1 read-write DEEPPWD NotDeepPowerDown ADC not in Deep-power down 0 DeepPowerDown ADC in Deep-power-down (default reset state) 1 ADCALDIF Differential mode for calibration This bit is set and cleared by software to configure the single-ended or differential inputs mode for the calibration. Note: The software is allowed to write this bit only when the ADC is disabled and is not calibrating (ADCAL = 0, JADSTART = 0, JADSTP = 0, ADSTART = 0, ADSTP = 0, ADDIS = 0 and ADEN = 0). 30 1 read-write ADCALDIF SingleEnded Calibration for single-ended mode 0 Differential Calibration for differential mode 1 ADCAL ADC calibration This bit is set by software to start the calibration of the ADC. Program first the bit ADCALDIF to determine if this calibration applies for single-ended or differential inputs mode. It is cleared by hardware after calibration is complete. Note: The software is allowed to launch a calibration by setting ADCAL only when ADEN = 0. Note: The software is allowed to update the calibration factor by writing ADC_CALFACT only when ADEN = 1 and ADSTART = 0 and JADSTART = 0 (ADC enabled and no conversion is ongoing) 31 1 read-write oneToSet ADCALR read NotCalibrating ADC calibration either not yet performed or completed 0 Calibrating ADC calibration in progress 1 ADCALW write StartCalibration Start the ADC calibration sequence 1 CFGR CFGR ADC configuration register 0xC 0x20 0x80000000 0xFFFFFFFF DMAEN Direct memory access enable This bit is set and cleared by software to enable the generation of DMA requests. This allows to use the DMA to manage automatically the converted data. For more details, refer to Section : Managing conversions using the DMA. Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). Note: In dual-ADC modes, this bit is not relevant and replaced by control bits MDMA[1:0] of the ADCx_CCR register. 0 1 read-write DMAEN Disabled DMA disabled 0 Enabled DMA enabled 1 DMACFG Direct memory access configuration This bit is set and cleared by software to select between two DMA modes of operation and is effective only when DMAEN = 1. For more details, refer to Section : Managing conversions using the DMA Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). Note: In dual-ADC modes, this bit is not relevant and replaced by control bit DMACFG of the ADCx_CCR register. 1 1 read-write DMACFG OneShot DMA One Shot mode selected 0 Circular DMA Circular mode selected 1 DFSDMCFG DFSDM mode configuration This bit is set and cleared by software to enable the DFSDM mode. It is effective only when DMAEN = 0. Note: To make sure no conversion is ongoing, the software is allowed to write this bit only when ADSTART= 0 and JADSTART= 0. 2 1 read-write RES Data resolution These bits are written by software to select the resolution of the conversion. Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 3 2 read-write RES Bits12 12-bit 0 Bits10 10-bit 1 Bits8 8-bit 2 Bits6 6-bit 3 ALIGN Data alignment This bit is set and cleared by software to select right or left alignment. Refer to Section : Data register, data alignment and offset (ADC_DR, OFFSETy, OFFSETy_CH, ALIGN) Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 5 1 read-write ALIGN Right Right alignment 0 Left Left alignment 1 EXTSEL External trigger selection for regular group These bits select the external event used to trigger the start of conversion of a regular group: ... Note: The software is allowed to write these bits only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 6 4 EXTSEL TIM1_CC1 Timer 1 CC1 event 0 TIM1_CC2 Timer 1 CC2 event 1 TIM1_CC3 Timer 1 CC3 event 2 TIM2_CC2 Timer 2 CC2 event 3 TIM3_TRGO Timer 3 TRGO event 4 EXTI11 EXTI line 11 6 TIM1_TRGO Timer 1 TRGO event 9 TIM1_TRGO2 Timer 1 TRGO2 event 10 TIM2_TRGO Timer 2 TRGO event 11 TIM6_TRGO Timer 6 TRGO event 13 TIM15_TRGO Timer 15 TRGO event 14 TIM3_CC4 Timer 3 CC4 event 15 EXTEN External trigger enable and polarity selection for regular channels These bits are set and cleared by software to select the external trigger polarity and enable the trigger of a regular group. Note: The software is allowed to write these bits only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 10 2 read-write EXTEN Disabled Trigger detection disabled 0 RisingEdge Trigger detection on the rising edge 1 FallingEdge Trigger detection on the falling edge 2 BothEdges Trigger detection on both the rising and falling edges 3 OVRMOD Overrun mode This bit is set and cleared by software and configure the way data overrun is managed. Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 12 1 read-write OVRMOD Preserve Preserve DR register when an overrun is detected 0 Overwrite Overwrite DR register when an overrun is detected 1 CONT Single / continuous conversion mode for regular conversions This bit is set and cleared by software. If it is set, regular conversion takes place continuously until it is cleared. Note: It is not possible to have both discontinuous mode and continuous mode enabled: it is forbidden to set both DISCEN = 1 and CONT = 1. Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no regular conversion is ongoing). Note: When dual mode is enabled (DUAL bits in ADCx_CCR register are not equal to zero), the bit CONT of the slave ADC is no more writable and its content is equal to the bit CONT of the master ADC. 13 1 read-write CONT Single Single conversion mode 0 Continuous Continuous conversion mode 1 AUTDLY Delayed conversion mode This bit is set and cleared by software to enable/disable the Auto Delayed Conversion mode. Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). Note: When dual mode is enabled (DUAL bits in ADCx_CCR register are not equal to zero), the bit AUTDLY of the slave ADC is no more writable and its content is equal to the bit AUTDLY of the master ADC. 14 1 read-write AUTDLY Off Auto delayed conversion mode off 0 On Auto delayed conversion mode on 1 DISCEN Discontinuous mode for regular channels This bit is set and cleared by software to enable/disable Discontinuous mode for regular channels. Note: It is not possible to have both discontinuous mode and continuous mode enabled: it is forbidden to set both DISCEN = 1 and CONT = 1. Note: It is not possible to use both auto-injected mode and discontinuous mode simultaneously: the bits DISCEN and JDISCEN must be kept cleared by software when JAUTO is set. Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no regular conversion is ongoing). Note: When dual mode is enabled (DUAL bits in ADCx_CCR register are not equal to zero), the bit DISCEN of the slave ADC is no more writable and its content is equal to the bit DISCEN of the master ADC. 16 1 read-write DISCEN Disabled Discontinuous mode on regular channels disabled 0 Enabled Discontinuous mode on regular channels enabled 1 DISCNUM Discontinuous mode channel count These bits are written by software to define the number of regular channels to be converted in discontinuous mode, after receiving an external trigger. ... Note: The software is allowed to write these bits only when ADSTART = 0 (which ensures that no regular conversion is ongoing). Note: When dual mode is enabled (DUAL bits in ADCx_CCR register are not equal to zero), the bits DISCNUM[2:0] of the slave ADC are no more writable and their content is equal to the bits DISCNUM[2:0] of the master ADC. 17 3 read-write 0 7 JDISCEN Discontinuous mode on injected channels This bit is set and cleared by software to enable/disable discontinuous mode on the injected channels of a group. Note: The software is allowed to write this bit only when JADSTART = 0 (which ensures that no injected conversion is ongoing). Note: It is not possible to use both auto-injected mode and discontinuous mode simultaneously: the bits DISCEN and JDISCEN must be kept cleared by software when JAUTO is set. Note: When dual mode is enabled (bits DUAL of ADCx_CCR register are not equal to zero), the bit JDISCEN of the slave ADC is no more writable and its content is equal to the bit JDISCEN of the master ADC. 20 1 read-write JDISCEN Disabled Discontinuous mode on injected channels disabled 0 Enabled Discontinuous mode on injected channels enabled 1 JQM JSQR queue mode This bit is set and cleared by software. It defines how an empty Queue is managed. Refer to Section 16.4.21: Queue of context for injected conversions for more information. Note: The software is allowed to write this bit only when JADSTART = 0 (which ensures that no injected conversion is ongoing). Note: When dual mode is enabled (DUAL bits in ADCx_CCR register are not equal to zero), the bit JQM of the slave ADC is no more writable and its content is equal to the bit JQM of the master ADC. 21 1 read-write JQM Mode0 JSQR Mode 0: Queue maintains the last written configuration into JSQR 0 Mode1 JSQR Mode 1: An empty queue disables software and hardware triggers of the injected sequence 1 AWD1SGL Enable the watchdog 1 on a single channel or on all channels This bit is set and cleared by software to enable the analog watchdog on the channel identified by the AWD1CH[4:0] bits or on all the channels Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 22 1 read-write AWD1SGL All Analog watchdog 1 enabled on all channels 0 Single Analog watchdog 1 enabled on single channel selected in AWD1CH 1 AWD1EN Analog watchdog 1 enable on regular channels This bit is set and cleared by software Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 23 1 read-write AWD1EN Disabled Analog watchdog 1 disabled on regular channels 0 Enabled Analog watchdog 1 enabled on regular channels 1 JAWD1EN Analog watchdog 1 enable on injected channels This bit is set and cleared by software Note: The software is allowed to write this bit only when JADSTART = 0 (which ensures that no injected conversion is ongoing). 24 1 read-write JAWD1EN Disabled Analog watchdog 1 disabled on injected channels 0 Enabled Analog watchdog 1 enabled on injected channels 1 JAUTO Automatic injected group conversion This bit is set and cleared by software to enable/disable automatic injected group conversion after regular group conversion. Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no regular nor injected conversion is ongoing). Note: When dual mode is enabled (DUAL bits in ADCx_CCR register are not equal to zero), the bit JAUTO of the slave ADC is no more writable and its content is equal to the bit JAUTO of the master ADC. 25 1 read-write JAUTO Disabled Automatic injected group conversion disabled 0 Enabled Automatic injected group conversion enabled 1 AWD1CH Analog watchdog 1 channel selection These bits are set and cleared by software. They select the input channel to be guarded by the analog watchdog. ..... others: reserved, must not be used Note: Some channels are not connected physically. Keep the corresponding AWD1CH[4:0] setting to the reset value. Note: The channel selected by AWD1CH must be also selected into the SQRi or JSQRi registers. Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 26 5 read-write 0 18 JQDIS Injected Queue disable These bits are set and cleared by software to disable the Injected Queue mechanism : Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no regular nor injected conversion is ongoing). Note: A set or reset of JQDIS bit causes the injected queue to be flushed and the JSQR register is cleared. 31 1 read-write CFGR2 CFGR2 ADC configuration register 2 0x10 0x20 0x00000000 0xFFFFFFFF ROVSE Regular Oversampling Enable This bit is set and cleared by software to enable regular oversampling. Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing) 0 1 read-write ROVSE Disabled Regular Oversampling disabled 0 Enabled Regular Oversampling enabled 1 JOVSE Injected Oversampling Enable This bit is set and cleared by software to enable injected oversampling. Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing) 1 1 read-write JOVSE Disabled Injected Oversampling disabled 0 Enabled Injected Oversampling enabled 1 OVSR Oversampling ratio This bitfield is set and cleared by software to define the oversampling ratio. Note: The software is allowed to write these bits only when ADSTART = 0 (which ensures that no conversion is ongoing). 2 3 read-write OVSR Ratio2 2x 0 Ratio4 4x 1 Ratio8 8x 2 Ratio16 16x 3 Ratio32 32x 4 Ratio64 64x 5 Ratio128 128x 6 Ratio256 256x 7 OVSS Oversampling shift This bitfield is set and cleared by software to define the right shifting applied to the raw oversampling result. Other codes reserved Note: The software is allowed to write these bits only when ADSTART = 0 (which ensures that no conversion is ongoing). 5 4 read-write OVSS NoShift No Shift 0 Shift1Bit Shift 1-bit 1 Shift2Bit Shift 2-bit 2 Shift3Bit Shift 3-bit 3 Shift4Bit Shift 4-bit 4 Shift5Bit Shift 5-bit 5 Shift6Bit Shift 6-bit 6 Shift7Bit Shift 7-bit 7 Shift8Bit Shift 8-bit 8 TROVS Triggered Regular Oversampling This bit is set and cleared by software to enable triggered oversampling Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no conversion is ongoing). 9 1 read-write TROVS All All oversampled conversions for a channel are done consecutively following a trigger 0 Single Each oversampled conversion for a channel needs a new trigger 1 ROVSM Regular Oversampling mode This bit is set and cleared by software to select the regular oversampling mode. Note: The software is allowed to write this bit only when ADSTART = 0 (which ensures that no conversion is ongoing). 10 1 read-write ROVSM ContinuedMode When injected conversions are triggered, the oversampling is temporary stopped and continued after the injection sequence (oversampling buffer is maintained during injected sequence) 0 ResumedMode When injected conversions are triggered, the current oversampling is aborted and resumed from start after the injection sequence (oversampling buffer is zeroed by injected sequence start) 1 SMPR1 SMPR1 ADC sample time register 1 0x14 0x20 0x00000000 0xFFFFFFFF 10 0x3 0-9 SMP%s Channel %s sample time selection 0 3 read-write SMP0 Cycles2_5 2.5 ADC clock cycles 0 Cycles6_5 6.5 ADC clock cycles 1 Cycles12_5 12.5 ADC clock cycles 2 Cycles24_5 24.5 ADC clock cycles 3 Cycles47_5 47.5 ADC clock cycles 4 Cycles92_5 92.5 ADC clock cycles 5 Cycles247_5 247.5 ADC clock cycles 6 Cycles640_5 640.5 ADC clock cycles 7 SMPPLUS Addition of one clock cycle to the sampling time To make sure no conversion is ongoing, the software is allowed to write this bit only when ADSTART= 0 and JADSTART= 0. 31 1 read-write SMPPLUS KeepCycles The sampling time remains set to 2.5 ADC clock cycles remains 0 Add1Cycle 2.5 ADC clock cycle sampling time becomes 3.5 ADC clock cycles for the ADC_SMPR1 and ADC_SMPR2 registers 1 SMPR2 SMPR2 ADC sample time register 2 0x18 0x20 0x00000000 0xFFFFFFFF 9 0x3 10-18 SMP%s Channel %s sample time selection 0 3 read-write TR1 TR1 ADC watchdog threshold register 1 0x20 0x20 0x0FFF0000 0xFFFFFFFF LT1 Analog watchdog 1 lower threshold These bits are written by software to define the lower threshold for the analog watchdog 1. Refer to Section 16.4.28: Analog window watchdog (AWD1EN, JAWD1EN, AWD1SGL, AWD1CH, AWD2CH, AWD3CH, AWD_HTx, AWD_LTx, AWDx) Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 0 12 read-write 0 4095 HT1 Analog watchdog 1 higher threshold These bits are written by software to define the higher threshold for the analog watchdog 1. Refer to Section 16.4.28: Analog window watchdog (AWD1EN, JAWD1EN, AWD1SGL, AWD1CH, AWD2CH, AWD3CH, AWD_HTx, AWD_LTx, AWDx) Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 16 12 read-write 0 4095 TR2 TR2 ADC watchdog threshold register 2 0x24 0x20 0x00FF0000 0xFFFFFFFF LT2 Analog watchdog 2 lower threshold These bits are written by software to define the lower threshold for the analog watchdog 2. Refer to Section 16.4.28: Analog window watchdog (AWD1EN, JAWD1EN, AWD1SGL, AWD1CH, AWD2CH, AWD3CH, AWD_HTx, AWD_LTx, AWDx) Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 0 8 read-write 0 255 HT2 Analog watchdog 2 higher threshold These bits are written by software to define the higher threshold for the analog watchdog 2. Refer to Section 16.4.28: Analog window watchdog (AWD1EN, JAWD1EN, AWD1SGL, AWD1CH, AWD2CH, AWD3CH, AWD_HTx, AWD_LTx, AWDx) Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 16 8 read-write 0 255 TR3 TR3 ADC watchdog threshold register 3 0x28 0x20 0x00FF0000 0xFFFFFFFF LT3 Analog watchdog 3 lower threshold These bits are written by software to define the lower threshold for the analog watchdog 3. This watchdog compares the 8-bit of LT3 with the 8 MSB of the converted data. Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 0 8 read-write 0 255 HT3 Analog watchdog 3 higher threshold These bits are written by software to define the higher threshold for the analog watchdog 3. Refer to Section 16.4.28: Analog window watchdog (AWD1EN, JAWD1EN, AWD1SGL, AWD1CH, AWD2CH, AWD3CH, AWD_HTx, AWD_LTx, AWDx) Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 16 8 read-write 0 255 SQR1 SQR1 ADC regular sequence register 1 0x30 0x20 0x00000000 0xFFFFFFFF L Regular channel sequence length These bits are written by software to define the total number of conversions in the regular channel conversion sequence. ... Note: The software is allowed to write these bits only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 0 4 read-write 0 15 4 0x6 1-4 SQ%s %s conversion in regular sequence 6 5 read-write 0 18 SQR2 SQR2 ADC regular sequence register 2 0x34 0x20 0x00000000 0xFFFFFFFF 5 0x6 5-9 SQ%s %s conversion in regular sequence 0 5 read-write SQR3 SQR3 ADC regular sequence register 3 0x38 0x20 0x00000000 0xFFFFFFFF 5 0x6 10-14 SQ%s %s conversion in regular sequence 0 5 read-write SQR4 SQR4 ADC regular sequence register 4 0x3C 0x20 0x00000000 0xFFFFFFFF 2 0x6 15-16 SQ%s %s conversion in regular sequence 0 5 read-write DR DR ADC regular data register 0x40 0x20 0x00000000 0xFFFFFFFF RDATA Regular data converted These bits are read-only. They contain the conversion result from the last converted regular channel. The data are left- or right-aligned as described in Section 16.4.26: Data management. 0 16 read-only 0 65535 JSQR JSQR ADC injected sequence register 0x4C 0x20 0x00000000 0xFFFFFFFF JL Injected channel sequence length These bits are written by software to define the total number of conversions in the injected channel conversion sequence. Note: The software is allowed to write these bits only when JADSTART = 0 (which ensures that no injected conversion is ongoing). 0 2 read-write 0 3 JEXTSEL External Trigger Selection for injected group These bits select the external event used to trigger the start of conversion of an injected group: ... Note: The software is allowed to write these bits only when JADSTART = 0 (which ensures that no injected conversion is ongoing). 2 4 read-write JEXTSEL TIM1_TRGO Timer 1 TRGO event 0 TIM1_CC4 Timer 1 CC4 event 1 TIM2_TRGO Timer 2 TRGO event 2 TIM2_CC1 Timer 2 CC1 event 3 TIM3_CC4 Timer 3 CC4 event 4 EXTI15 EXTI line 15 6 TIM1_TRGO2 Timer 1 TRGO2 event 8 TIM3_CC3 Timer 3 CC3 event 11 TIM3_TRGO Timer 3 TRGO event 12 TIM3_CC1 Timer 3 CC1 event 13 TIM6_TRGO Timer 6 TRGO event 14 TIM15_TRGO Timer 15 TRGO event 15 JEXTEN External Trigger Enable and Polarity Selection for injected channels These bits are set and cleared by software to select the external trigger polarity and enable the trigger of an injected group. Note: The software is allowed to write these bits only when JADSTART = 0 (which ensures that no injected conversion is ongoing). Note: If JQM = 1 and if the Queue of Context becomes empty, the software and hardware triggers of the injected sequence are both internally disabled (refer to Section 16.4.21: Queue of context for injected conversions) 6 2 read-write JEXTEN Disabled Trigger detection disabled 0 RisingEdge Trigger detection on the rising edge 1 FallingEdge Trigger detection on the falling edge 2 BothEdges Trigger detection on both the rising and falling edges 3 4 0x6 1-4 JSQ%s %s conversion in injected sequence 8 5 read-write 0 19 4 0x4 1-4 OFR%s OFR%s ADC offset %s register 0x60 0x20 0x00000000 0xFFFFFFFF OFFSET Data offset y for the channel programmed into bits OFFSETy_CH[4:0] These bits are written by software to define the offset y to be subtracted from the raw converted data when converting a channel (can be regular or injected). The channel to which applies the data offset y must be programmed in the bits OFFSETy_CH[4:0]. The conversion result can be read from in the ADC_DR (regular conversion) or from in the ADC_JDRyi registers (injected conversion). Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). If several offset (OFFSETy) point to the same channel, only the offset with the lowest x value is considered for the subtraction. Note: Ex: if OFFSET1_CH[4:0]=4 and OFFSET2_CH[4:0]=4, this is OFFSET1[11:0] which is subtracted when converting channel 4. 0 12 read-write 0 4095 OFFSET_CH Channel selection for the data offset y These bits are written by software to define the channel to which the offset programmed into bits OFFSETy[11:0] applies. Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). Note: Some channels are not connected physically and must not be selected for the data offset y. 26 5 read-write 0 31 OFFSET_EN Offset y enable This bit is written by software to enable or disable the offset programmed into bits OFFSETy[11:0]. Note: The software is allowed to write this bit only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). 31 1 read-write OFFSET_EN Disabled This bit is written by software to enable or disable the offset programmed into bits OFFSETy[11:0] 0 Enabled This bit is written by software to enable or disable the offset programmed into bits OFFSETy[11:0] 1 4 0x4 1-4 JDR%s JDR%s ADC injected channel %s data register 0x80 0x20 0x00000000 0xFFFFFFFF JDATA Injected data These bits are read-only. They contain the conversion result from injected channel y. The data are left -or right-aligned as described in Section 16.4.26: Data management. 0 16 read-only 0 65535 AWD2CR AWD2CR ADC analog watchdog 2 configuration register 0xA0 0x20 0x00000000 0xFFFFFFFF 19 0x1 0-18 AWD2CH%s Analog watchdog 2 channel selection These bits are set and cleared by software. They enable and select the input channels to be guarded by the analog watchdog 2. AWD2CH[i] = 0: ADC analog input channel i is not monitored by AWD2 AWD2CH[i] = 1: ADC analog input channel i is monitored by AWD2 When AWD2CH[18:0] = 000..0, the analog watchdog 2 is disabled Note: The channels selected by AWD2CH must be also selected into the SQRi or JSQRi registers. Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). Note: Some channels are not connected physically and must not be selected for the analog watchdog. 0 1 AWD2CH0 NotMonitored Input channel not monitored by AWDx 0 Monitored Input channel monitored by AWDx 1 AWD3CR AWD3CR ADC analog watchdog 3 configuration register 0xA4 0x20 0x00000000 0xFFFFFFFF 19 0x1 0-18 AWD3CH%s Analog watchdog 3 channel selection These bits are set and cleared by software. They enable and select the input channels to be guarded by the analog watchdog 3. AWD3CH[i] = 0: ADC analog input channel i is not monitored by AWD3 AWD3CH[i] = 1: ADC analog input channel i is monitored by AWD3 When AWD3CH[18:0] = 000..0, the analog watchdog 3 is disabled Note: The channels selected by AWD3CH must be also selected into the SQRi or JSQRi registers. Note: The software is allowed to write these bits only when ADSTART = 0 and JADSTART = 0 (which ensures that no conversion is ongoing). Note: Some channels are not connected physically and must not be selected for the analog watchdog. 0 1 AWD3CH0 NotMonitored Input channel not monitored by AWDx 0 Monitored Input channel monitored by AWDx 1 DIFSEL DIFSEL ADC differential mode selection register 0xB0 0x20 0x00000000 0xFFFFFFFF 19 0x1 0-18 DIFSEL%s Differential mode for channel %s 0 1 DIFSEL0 SingleEnded Input channel is configured in single-ended mode 0 Differential Input channel is configured in differential mode 1 CALFACT CALFACT ADC calibration factors 0xB4 0x20 0x00000000 0xFFFFFFFF CALFACT_S Calibration Factors In single-ended mode These bits are written by hardware or by software. Once a single-ended inputs calibration is complete, they are updated by hardware with the calibration factors. Software can write these bits with a new calibration factor. If the new calibration factor is different from the current one stored into the analog ADC, it is then applied once a new single-ended calibration is launched. Note: The software is allowed to write these bits only when ADEN = 1, ADSTART = 0 and JADSTART = 0 (ADC is enabled and no calibration is ongoing and no conversion is ongoing). 0 7 read-write 0 127 CALFACT_D Calibration Factors in differential mode These bits are written by hardware or by software. Once a differential inputs calibration is complete, they are updated by hardware with the calibration factors. Software can write these bits with a new calibration factor. If the new calibration factor is different from the current one stored into the analog ADC, it is then applied once a new differential calibration is launched. Note: The software is allowed to write these bits only when ADEN = 1, ADSTART = 0 and JADSTART = 0 (ADC is enabled and no calibration is ongoing and no conversion is ongoing). 16 7 read-write 0 127 ADC2 0x50040100 ADC12_Common Analog-to-Digital Converter ADC 0x50040300 0x0 0x11 registers CSR CSR ADC common status register 0x0 0x20 0x00000000 0xFFFFFFFF ADRDY_MST Master ADC ready This bit is a copy of the ADRDY bit in the corresponding ADC_ISR register. 0 1 read-only ADRDY_MST NotReady ADC is not ready to start conversion 0 Ready ADC is ready to start conversion 1 EOSMP_MST End of Sampling phase flag of the master ADC This bit is a copy of the EOSMP bit in the corresponding ADC_ISR register. 1 1 read-only EOSMP_MST NotEnded End of sampling phase no yet reached 0 Ended End of sampling phase reached 1 EOC_MST End of regular conversion of the master ADC This bit is a copy of the EOC bit in the corresponding ADC_ISR register. 2 1 read-only EOC_MST NotComplete Regular conversion is not complete 0 Complete Regular conversion complete 1 EOS_MST End of regular sequence flag of the master ADC This bit is a copy of the EOS bit in the corresponding ADC_ISR register. 3 1 read-only EOS_MST NotComplete Regular sequence is not complete 0 Complete Regular sequence complete 1 OVR_MST Overrun flag of the master ADC This bit is a copy of the OVR bit in the corresponding ADC_ISR register. 4 1 read-only OVR_MST NoOverrun No overrun occurred 0 Overrun Overrun occurred 1 JEOC_MST End of injected conversion flag of the master ADC This bit is a copy of the JEOC bit in the corresponding ADC_ISR register. 5 1 read-only JEOC_MST NotComplete Injected conversion is not complete 0 Complete Injected conversion complete 1 JEOS_MST End of injected sequence flag of the master ADC This bit is a copy of the JEOS bit in the corresponding ADC_ISR register. 6 1 read-only JEOS_MST NotComplete Injected sequence is not complete 0 Complete Injected sequence complete 1 AWD1_MST Analog watchdog 1 flag of the master ADC This bit is a copy of the AWD1 bit in the corresponding ADC_ISR register. 7 1 read-only AWD1_MST NoEvent No analog watchdog event occurred 0 Event Analog watchdog event occurred 1 AWD2_MST Analog watchdog 2 flag of the master ADC This bit is a copy of the AWD2 bit in the corresponding ADC_ISR register. 8 1 read-only AWD3_MST Analog watchdog 3 flag of the master ADC This bit is a copy of the AWD3 bit in the corresponding ADC_ISR register. 9 1 read-only JQOVF_MST Injected Context Queue Overflow flag of the master ADC This bit is a copy of the JQOVF bit in the corresponding ADC_ISR register. 10 1 read-only JQOVF_MST NoOverflow No injected context queue overflow has occurred 0 Overflow Injected context queue overflow has occurred 1 ADRDY_SLV Slave ADC ready This bit is a copy of the ADRDY bit in the corresponding ADC_ISR register. 16 1 read-only EOSMP_SLV End of Sampling phase flag of the slave ADC This bit is a copy of the EOSMP2 bit in the corresponding ADC_ISR register. 17 1 read-only EOC_SLV End of regular conversion of the slave ADC This bit is a copy of the EOC bit in the corresponding ADC_ISR register. 18 1 read-only EOS_SLV End of regular sequence flag of the slave ADC. This bit is a copy of the EOS bit in the corresponding ADC_ISR register. 19 1 read-only OVR_SLV Overrun flag of the slave ADC This bit is a copy of the OVR bit in the corresponding ADC_ISR register. 20 1 read-only JEOC_SLV End of injected conversion flag of the slave ADC This bit is a copy of the JEOC bit in the corresponding ADC_ISR register. 21 1 read-only JEOS_SLV End of injected sequence flag of the slave ADC This bit is a copy of the JEOS bit in the corresponding ADC_ISR register. 22 1 read-only AWD1_SLV Analog watchdog 1 flag of the slave ADC This bit is a copy of the AWD1 bit in the corresponding ADC_ISR register. 23 1 read-only AWD2_SLV Analog watchdog 2 flag of the slave ADC This bit is a copy of the AWD2 bit in the corresponding ADC_ISR register. 24 1 read-only AWD3_SLV Analog watchdog 3 flag of the slave ADC This bit is a copy of the AWD3 bit in the corresponding ADC_ISR register. 25 1 read-only JQOVF_SLV Injected Context Queue Overflow flag of the slave ADC This bit is a copy of the JQOVF bit in the corresponding ADC_ISR register. 26 1 read-only CCR CCR ADC common control register 0x8 0x20 0x00000000 0xFFFFFFFF DUAL Dual ADC mode selection These bits are written by software to select the operating mode. All the ADCs independent: 00001 to 01001: Dual mode, master and slave ADCs working together All other combinations are reserved and must not be programmed Note: The software is allowed to write these bits only when the ADCs are disabled (ADCAL = 0, JADSTART = 0, ADSTART = 0, ADSTP = 0, ADDIS = 0 and ADEN = 0). 0 5 read-write DUAL Independent Independent mode 0 DualRJ Dual, combined regular simultaneous + injected simultaneous mode 1 DualRA Dual, combined regular simultaneous + alternate trigger mode 2 DualIJ Dual, combined interleaved mode + injected simultaneous mode 3 DualJ Dual, injected simultaneous mode only 5 DualR Dual, regular simultaneous mode only 6 DualI Dual, interleaved mode only 7 DualA Dual, alternate trigger mode only 9 DELAY Delay between 2 sampling phases These bits are set and cleared by software. These bits are used in dual interleaved modes. Refer to Table 112 for the value of ADC resolution versus DELAY bits values. Note: The software is allowed to write these bits only when the ADCs are disabled (ADCAL = 0, JADSTART = 0, ADSTART = 0, ADSTP = 0, ADDIS = 0 and ADEN = 0). 8 4 read-write 0 15 DMACFG DMA configuration (for dual ADC mode) This bit is set and cleared by software to select between two DMA modes of operation and is effective only when DMAEN = 1. For more details, refer to Section : Managing conversions using the DMA Note: The software is allowed to write these bits only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 13 1 read-write MDMA Direct memory access mode for dual ADC mode This bitfield is set and cleared by software. Refer to the DMA controller section for more details. Note: The software is allowed to write these bits only when ADSTART = 0 (which ensures that no regular conversion is ongoing). 14 2 read-write CKMODE ADC clock mode These bits are set and cleared by software to define the ADC clock scheme (which is common to both master and slave ADCs): In all synchronous clock modes, there is no jitter in the delay from a timer trigger to the start of a conversion. Note: The software is allowed to write these bits only when the ADCs are disabled (ADCAL = 0, JADSTART = 0, ADSTART = 0, ADSTP = 0, ADDIS = 0 and ADEN = 0). 16 2 read-write CKMODE Asynchronous Use Kernel Clock adc_ker_ck_input divided by PRESC. Asynchronous to AHB clock 0 SyncDiv1 Use AHB clock rcc_hclk3. In this case rcc_hclk must equal sys_d1cpre_ck 1 SyncDiv2 Use AHB clock rcc_hclk3 divided by 2 2 SyncDiv4 Use AHB clock rcc_hclk3 divided by 4 3 PRESC ADC prescaler These bits are set and cleared by software to select the frequency of the clock to the ADC. The clock is common for all the ADCs. other: reserved Note: The software is allowed to write these bits only when the ADC is disabled (ADCAL = 0, JADSTART = 0, ADSTART = 0, ADSTP = 0, ADDIS = 0 and ADEN = 0). The ADC prescaler value is applied only when CKMODE[1:0] = 00. 18 4 read-write VREFEN V_REFINT enable This bit is set and cleared by software to enable/disable the V_REFINT channel. 22 1 read-write VREFEN Disabled V_REFINT channel disabled 0 Enabled V_REFINT channel enabled 1 CH17SEL CH17 selection This bit is set and cleared by software to control channel 17. 23 1 read-write CH18SEL CH18 selection This bit is set and cleared by software to control channel 18. 24 1 read-write CDR CDR ADC common regular data register for dual mode 0xC 0x20 0x00000000 0xFFFFFFFF RDATA_MST Regular data of the master ADC. In dual mode, these bits contain the regular data of the master ADC. Refer to Section 16.4.32: Dual ADC modes. The data alignment is applied as described in Section : Data register, data alignment and offset (ADC_DR, OFFSETy, OFFSETy_CH, ALIGN)) In MDMA = 11 mode, bits 15:8 contains SLV_ADC_DR[7:0], bits 7:0 contains MST_ADC_DR[7:0]. 0 16 read-only RDATA_SLV Regular data of the slave ADC In dual mode, these bits contain the regular data of the slave ADC. Refer to Section 16.4.32: Dual ADC modes. The data alignment is applied as described in Section : Data register, data alignment and offset (ADC_DR, OFFSETy, OFFSETy_CH, ALIGN)) 16 16 read-only ADC_Common ADC common registers ADC_Common 0x50040300 0x0 0x10 registers CSR ADC common status register 0x0 read-only 0x00000000 JQOVF_MST Injected Context Queue Overflow flag of the master ADC 10 1 JQOVF_MST NoOverflow No injected context queue overflow has occurred 0 Overflow Injected context queue overflow has occurred 1 JQOVF_SLV Injected Context Queue Overflow flag of the slave ADC 26 1 AWD1_MST Analog watchdog 1 flag of the master ADC 7 1 AWD1_MST NoEvent No analog watchdog event occurred 0 Event Analog watchdog event occurred 1 AWD3_SLV Analog watchdog 3 flag of the slave ADC 25 1 AWD2_SLV Analog watchdog 2 flag of the slave ADC 24 1 AWD1_SLV Analog watchdog 1 flag of the slave ADC 23 1 JEOS_MST End of injected sequence flag of the master ADC 6 1 JEOS_MST NotComplete Injected sequence is not complete 0 Complete Injected sequence complete 1 JEOS_SLV End of injected sequence flag of the slave ADC 22 1 JEOC_MST End of injected conversion flag of the master ADC 5 1 JEOC_MST NotComplete Injected conversion is not complete 0 Complete Injected conversion complete 1 JEOC_SLV End of injected conversion flag of the slave ADC 21 1 OVR_MST Overrun flag of the master ADC 4 1 OVR_MST NoOverrun No overrun occurred 0 Overrun Overrun occurred 1 OVR_SLV Overrun flag of the slave ADC 20 1 EOS_MST End of regular sequence flag of the master ADC 3 1 EOS_MST NotComplete Regular sequence is not complete 0 Complete Regular sequence complete 1 EOS_SLV End of regular sequence flag of the slave ADC 19 1 EOC_MST End of regular conversion flag of the master ADC 2 1 EOC_MST NotComplete Regular conversion is not complete 0 Complete Regular conversion complete 1 EOC_SLV End of regular conversion flag of the slave ADC 18 1 EOSMP_MST End of Sampling phase flag of the master ADC 1 1 EOSMP_MST NotEnded End of sampling phase no yet reached 0 Ended End of sampling phase reached 1 EOSMP_SLV End of Sampling phase flag of the slave ADC 17 1 ADRDY_MST master ADC ready 0 1 ADRDY_MST NotReady ADC is not ready to start conversion 0 Ready ADC is ready to start conversion 1 ADRDY_SLV Slave ADC ready 16 1 AWD3_MST Analog watchdog 3 flag of the master ADC 9 1 AWD2_MST Analog watchdog 2 flag of the master ADC 8 1 CCR ADC common control register 0x8 read-write 0x00000000 VSENSEEN Temperature sensor selection 23 1 VSENSEEN Disabled The selected ADC channel disabled 0 Enabled The selected ADC channel enabled 1 VBATEN VBAT selection 24 1 VREFEN Vrefint enable 22 1 VREFEN Disabled V_REFINT channel disabled 0 Enabled V_REFINT channel enabled 1 PRESC ADC prescaler 18 4 PRESC Div1 Input ADC clock not divided 0 Div2 Input ADC clock divided by 2 1 Div4 Input ADC clock divided by 4 2 Div6 Input ADC clock divided by 6 3 Div8 Input ADC clock divided by 8 4 Div10 Input ADC clock divided by 10 5 Div12 Input ADC clock divided by 12 6 Div16 Input ADC clock divided by 16 7 Div32 Input ADC clock divided by 32 8 Div64 Input ADC clock divided by 64 9 Div128 Input ADC clock divided by 128 10 Div256 Input ADC clock divided by 256 11 CKMODE ADC clock mode 16 2 CKMODE Asynchronous Use Kernel Clock adc_ker_ck_input divided by PRESC. Asynchronous to AHB clock 0 SyncDiv1 Use AHB clock rcc_hclk3. In this case rcc_hclk must equal sys_d1cpre_ck 1 SyncDiv2 Use AHB clock rcc_hclk3 divided by 2 2 SyncDiv4 Use AHB clock rcc_hclk3 divided by 4 3 MDMA Direct memory access mode for dual ADC mode 14 2 MDMA Disabled MDMA mode disabled 0 Interleaved Enable dual interleaved mode to output to the master channel of DFSDM interface both Master and the Slave result (16-bit data width) 1 Bits12_10 MDMA mode enabled for 12 and 10-bit resolution 2 Bits8_6 MDMA mode enabled for 8 and 6-bit resolution 3 DMACFG DMA configuration (for dual ADC mode) 13 1 DMACFG OneShotMode DMA One Shot mode selected 0 CircularMode DMA Circular mode selected 1 DELAY Delay between 2 sampling phases 8 4 0 15 DUAL Dual ADC mode selection 0 5 DUAL Independent Independent mode 0 DualRJ Dual, combined regular simultaneous + injected simultaneous mode 1 DualRA Dual, combined regular simultaneous + alternate trigger mode 2 DualIJ Dual, combined interleaved mode + injected simultaneous mode 3 DualJ Dual, injected simultaneous mode only 5 DualR Dual, regular simultaneous mode only 6 DualI Dual, interleaved mode only 7 DualA Dual, alternate trigger mode only 9 CDR ADC common regular data register for dual mode 0xC read-only 0x00000000 RDATA_SLV Regular data of the slave ADC 16 16 0 65535 RDATA_MST Regular data of the master ADC 0 16 0 65535 COMP Comparator COMP 0x40010200 0x0 0x200 registers COMP COMP interrupts 64 COMP1_CSR COMP1_CSR Comparator 1 control and status register 0x0 0x20 0x00000000 EN Comparator 1 enable bit 0 1 read-write EN Disabled Comparator X disabled 0 Enabled Comparator X enabled 1 PWRMODE Power Mode of the comparator 1 2 2 read-write INMSEL Comparator 1 Input Minus connection configuration bit 4 3 read-write INPSEL Comparator1 input plus selection bit 7 1 read-write POLARITY Comparator 1 polarity selection bit 15 1 read-write POLARITY Normal Comparator X output value not inverted 0 Inverted Comparator X output value inverted 1 HYST Comparator 1 hysteresis selection bits 16 2 read-write HYST None No hysteresis 0 Low Low hysteresis 1 Medium Medium hysteresis 2 High High hysteresis 3 BLANKING Comparator 1 blanking source selection bits 18 3 read-write BRGEN Scaler bridge enable 22 1 read-write BRGEN Disabled Scaler resistor bridge disabled 0 Enabled Scaler resistor bridge enabled 1 SCALEN Voltage scaler enable bit 23 1 read-write SCALEN Disabled Voltage scaler disabled 0 Enabled Voltage scaler enabled 1 VALUE Comparator 1 output status bit 30 1 read-only VALUE Low Comparator output is low 0 High Comparator output is high 1 LOCK COMP1_CSR register lock bit 31 1 write-only LOCK Unlocked Comparator CSR bits are read-write 0 Locked Comparator CSR bits are read-only 1 COMP2_CSR COMP2_CSR Comparator 2 control and status register 0x4 0x20 0x00000000 EN Comparator 2 enable bit 0 1 read-write EN Disabled Comparator X disabled 0 Enabled Comparator X enabled 1 PWRMODE Power Mode of the comparator 2 2 2 read-write INMSEL Comparator 2 Input Minus connection configuration bit 4 3 read-write INPSEL Comparator 2 Input Plus connection configuration bit 7 1 read-write WINMODE Windows mode selection bit 9 1 read-write WINMODE Disabled COMP2 input plus is not connected to COMP1 0 Enabled COMP2 input plus is connected to COMP1 1 POLARITY Comparator 2 polarity selection bit 15 1 read-write POLARITY Normal Comparator X output value not inverted 0 Inverted Comparator X output value inverted 1 HYST Comparator 2 hysteresis selection bits 16 2 read-write HYST None No hysteresis 0 Low Low hysteresis 1 Medium Medium hysteresis 2 High High hysteresis 3 BLANKING Comparator 2 blanking source selection bits 18 3 read-write BRGEN Scaler bridge enable 22 1 read-write BRGEN Disabled Scaler resistor bridge disabled 0 Enabled Scaler resistor bridge enabled 1 SCALEN Voltage scaler enable bit 23 1 read-write SCALEN Disabled Voltage scaler disabled 0 Enabled Voltage scaler enabled 1 VALUE Comparator 2 output status bit 30 1 read-only VALUE Low Comparator output is low 0 High Comparator output is high 1 LOCK COMP2_CSR register lock bit 31 1 write-only LOCK Unlocked Comparator CSR bits are read-write 0 Locked Comparator CSR bits are read-only 1 CRC Cyclic redundancy check calculation unit CRC 0x40023000 0x0 0x400 registers DR DR Data register 0x0 0x20 read-write 0xFFFFFFFF DR Data register bits 0 32 0 4294967295 DR8 Data register - byte sized DR 0x0 0x8 read-write 0x000000FF DR8 Data register bits 0 8 0 255 DR16 Data register - half-word sized DR 0x0 0x10 read-write 0x0000FFFF DR16 Data register bits 0 16 0 65535 IDR IDR Independent data register 0x4 0x20 read-write 0x00000000 IDR General-purpose 8-bit data register bits 0 8 0 255 CR CR Control register 0x8 0x20 0x00000000 REV_OUT Reverse output data 7 1 read-write REV_OUT Normal Bit order not affected 0 Reversed Bit reversed output 1 REV_IN Reverse input data 5 2 read-write REV_IN Normal Bit order not affected 0 Byte Bit reversal done by byte 1 HalfWord Bit reversal done by half-word 2 Word Bit reversal done by word 3 POLYSIZE Polynomial size 3 2 read-write POLYSIZE Polysize32 32-bit polynomial 0 Polysize16 16-bit polynomial 1 Polysize8 8-bit polynomial 2 Polysize7 7-bit polynomial 3 RESET RESET bit 0 1 write-only RESETW Reset Resets the CRC calculation unit and sets the data register to 0xFFFF FFFF 1 INIT INIT Initial CRC value 0x10 0x20 read-write 0xFFFFFFFF INIT Programmable initial CRC value 0 32 0 4294967295 POL POL polynomial 0x14 0x20 read-write 0x04C11DB7 POL Programmable polynomial 0 32 0 4294967295 CRS Clock recovery system CRS 0x40006000 0x0 0x400 registers CRS CRS global interrupt 82 CR CR control register 0x0 0x20 read-write 0x00002000 TRIM HSI48 oscillator smooth trimming 8 6 0 63 SWSYNC Generate software SYNC event 7 1 SWSYNC Sync A software sync is generated 1 AUTOTRIMEN Automatic trimming enable 6 1 AUTOTRIMEN Disabled Automatic trimming disabled 0 Enabled Automatic trimming enabled 1 CEN Frequency error counter enable 5 1 CEN Disabled Frequency error counter disabled 0 Enabled Frequency error counter enabled 1 SYNCOKIE SYNC event OK interrupt enable 0 1 SYNCOKIE Disabled Interrupt disabled 0 Enabled Interrupt enabled 1 ESYNCIE Expected SYNC interrupt enable 3 1 ERRIE Synchronization or trimming error interrupt enable 2 1 SYNCWARNIE SYNC warning interrupt enable 1 1 CFGR CFGR configuration register 0x4 0x20 read-write 0x2022BB7F SYNCPOL SYNC polarity selection 31 1 SYNCPOL RisingEdge SYNC active on rising edge 0 FallingEdge SYNC active on falling edge 1 SYNCSRC SYNC signal source selection 28 2 SYNCSRC GPIO_AF GPIO AF (crs_sync_in_1) selected as SYNC signal source 0 LSE LSE (crs_sync_in_2) selected as SYNC signal source 1 USB_SOF USB SOF (crs_sync_in_3) selected as SYNC signal source 2 SYNCDIV SYNC divider 24 3 SYNCDIV Div1 SYNC not divided 0 Div2 SYNC divided by 2 1 Div4 SYNC divided by 4 2 Div8 SYNC divided by 8 3 Div16 SYNC divided by 16 4 Div32 SYNC divided by 32 5 Div64 SYNC divided by 64 6 Div128 SYNC divided by 128 7 FELIM Frequency error limit 16 8 0 255 RELOAD Counter reload value 0 16 0 65535 ISR ISR interrupt and status register 0x8 0x20 read-only 0x00000000 FECAP Frequency error capture 16 16 0 65535 FEDIR Frequency error direction 15 1 FEDIR UpCounting Error in up-counting direction 0 DownCounting Error in down-counting direction 1 SYNCOKF SYNC event OK flag 0 1 SYNCOKF NotSignaled Signal not set 0 Signaled Signal set 1 TRIMOVF Trimming overflow or underflow 10 1 SYNCMISS SYNC missed 9 1 SYNCERR SYNC error 8 1 ESYNCF Expected SYNC flag 3 1 ERRF Error flag 2 1 SYNCWARNF SYNC warning flag 1 1 ICR ICR interrupt flag clear register 0xC 0x20 read-write 0x00000000 SYNCOKC SYNC event OK clear flag 0 1 SYNCOKC Clear Clear flag 1 ESYNCC Expected SYNC clear flag 3 1 ERRC Error clear flag 2 1 SYNCWARNC SYNC warning clear flag 1 1 DBGMCU MCU debug component DBGMCU 0xE0042000 0x0 0x400 registers IDCODE IDCODE DBGMCU_IDCODE 0x0 0x20 read-only 0x00000000 DEV_ID Device identifier 0 12 REV_ID Revision identifie 16 16 CR CR Debug MCU configuration register 0x4 0x20 read-write 0x00000000 DBG_SLEEP Debug Sleep mode 0 1 DBG_STOP Debug Stop mode 1 1 DBG_STANDBY Debug Standby mode 2 1 TRACE_IOEN Trace pin assignment control 5 1 TRACE_MODE Trace pin assignment control 6 2 APB1FZR1 APB1FZR1 Debug MCU APB1 freeze register1 0x8 0x20 read-write 0x00000000 DBG_TIM2_STOP TIM2 counter stopped when core is halted 0 1 DBG_TIM6_STOP TIM6 counter stopped when core is halted 4 1 DBG_TIM7_STOP TIM7 counter stopped when core is halted 5 1 DBG_RTC_STOP RTC counter stopped when core is halted 10 1 DBG_WWDG_STOP Window watchdog counter stopped when core is halted 11 1 DBG_IWDG_STOP Independent watchdog counter stopped when core is halted 12 1 DBG_I2C1_STOP I2C1 SMBUS timeout counter stopped when core is halted 21 1 DBG_I2C2_STOP I2C2 SMBUS timeout counter stopped when core is halted 22 1 DBG_I2C3_STOP I2C3 SMBUS timeout counter stopped when core is halted 23 1 DBG_CAN_STOP bxCAN stopped when core is halted 25 1 DBG_LPTIM1_STOP LPTIM1 counter stopped when core is halted 31 1 APB1FZR2 APB1FZR2 Debug MCU APB1 freeze register 2 0xC 0x20 read-write 0x00000000 DBG_LPTIM2_STOP LPTIM2 counter stopped when core is halted 5 1 APB2FZR APB2FZR Debug MCU APB2 freeze register 0x10 0x20 read-write 0x00000000 DBG_TIM1_STOP TIM1 counter stopped when core is halted 11 1 DBG_TIM15_STOP TIM15 counter stopped when core is halted 16 1 DBG_TIM16_STOP TIM16 counter stopped when core is halted 17 1 DMA1 Direct memory access controller DMA 0x40020000 0x0 0x400 registers DMA1_Channel1 DMA1 Channel1 global interrupt 11 DMA1_Channel2 DMA1 Channel2 global interrupt 12 DMA1_Channel3 DMA1 Channel3 interrupt 13 DMA1_Channel4 DMA1 Channel4 interrupt 14 DMA1_Channel5 DMA1 Channel5 interrupt 15 DMA1_Channel6 DMA1 Channel6 interrupt 16 DMA1_Channel7 DMA1 Channel 7 interrupt 17 ISR ISR interrupt status register 0x0 0x20 read-only 0x00000000 7 0x4 1-7 TEIF%s Channel %s Transfer Error flag 3 1 TEIF1 NoError No transfer error 0 Error A transfer error has occured 1 7 0x4 1-7 HTIF%s Channel %s Half Transfer Complete flag 2 1 HTIF1 NotHalf No half transfer event 0 Half A half transfer event has occured 1 7 0x4 1-7 TCIF%s Channel %s Transfer Complete flag 1 1 TCIF1 NotComplete No transfer complete event 0 Complete A transfer complete event has occured 1 7 0x4 1-7 GIF%s Channel %s Global interrupt flag 0 1 GIF1 NoEvent No transfer error, half event, complete event 0 Event A transfer error, half event or complete event has occured 1 IFCR IFCR interrupt flag clear register 0x4 0x20 write-only 0x00000000 7 0x4 1-7 CTEIF%s Channel %s Transfer Error clear 3 1 CTEIF1 Clear Clears the TEIF flag in the ISR register 1 7 0x4 1-7 CHTIF%s Channel %s Half Transfer clear 2 1 CHTIF1 Clear Clears the HTIF flag in the ISR register 1 7 0x4 1-7 CTCIF%s Channel %s Transfer Complete clear 1 1 CTCIF1 Clear Clears the TCIF flag in the ISR register 1 7 0x4 1-7 CGIF%s Channel %s Global interrupt clear 0 1 CGIF1 Clear Clears the GIF, TEIF, HTIF, TCIF flags in the ISR register 1 7 0x14 1-7 CH%s Channel cluster: CCR?, CNDTR?, CPAR?, and CMAR? registers 0x8 CR CCR1 channel x configuration register 0x0 0x20 read-write 0x00000000 MEM2MEM Memory to memory mode 14 1 MEM2MEM Disabled Memory to memory mode disabled 0 Enabled Memory to memory mode enabled 1 PL Channel priority level 12 2 PL Low Low priority 0 Medium Medium priority 1 High High priority 2 VeryHigh Very high priority 3 PSIZE Peripheral size 8 2 PSIZE Bits8 8-bit size 0 Bits16 16-bit size 1 Bits32 32-bit size 2 MSIZE Memory size 10 2 PINC Peripheral increment mode 6 1 PINC Disabled Increment mode disabled 0 Enabled Increment mode enabled 1 MINC Memory increment mode 7 1 CIRC Circular mode 5 1 CIRC Disabled Circular buffer disabled 0 Enabled Circular buffer enabled 1 DIR Data transfer direction 4 1 DIR FromPeripheral Read from peripheral 0 FromMemory Read from memory 1 TEIE Transfer error interrupt enable 3 1 TEIE Disabled Transfer Error interrupt disabled 0 Enabled Transfer Error interrupt enabled 1 HTIE Half transfer interrupt enable 2 1 HTIE Disabled Half Transfer interrupt disabled 0 Enabled Half Transfer interrupt enabled 1 TCIE Transfer complete interrupt enable 1 1 TCIE Disabled Transfer Complete interrupt disabled 0 Enabled Transfer Complete interrupt enabled 1 EN Channel enable 0 1 EN Disabled Channel disabled 0 Enabled Channel enabled 1 NDTR CNDTR1 channel x number of data register 0x4 0x20 read-write 0x00000000 NDT Number of data to transfer 0 16 0 65535 PAR CPAR1 channel x peripheral address register 0x8 0x20 read-write 0x00000000 PA Peripheral address 0 32 MAR CMAR1 channel x memory address register 0xC 0x20 read-write 0x00000000 MA Memory address 0 32 CSELR CSELR channel selection register 0xA8 0x20 read-write 0x00000000 C1S DMA channel 1 selection 0 4 C1S NoMapping Default mapping 0 Map1 Mapping 1 1 Map2 Mapping 2 2 Map3 Mapping 3 3 Map4 Mapping 4 4 Map5 Mapping 5 5 Map6 Mapping 6 6 Map7 Mapping 7 7 Map8 Mapping 8 8 Map9 Mapping 9 9 Map10 Mapping 10 10 Map11 Mapping 11 11 Map12 Mapping 12 12 Map13 Mapping 13 13 Map14 Mapping 14 14 Map15 Mapping 15 15 C7S DMA channel 7 selection 24 4 C6S DMA channel 6 selection 20 4 C5S DMA channel 5 selection 16 4 C4S DMA channel 4 selection 12 4 C3S DMA channel 3 selection 8 4 C2S DMA channel 2 selection 4 4 DMA2 0x40020400 DMA2_Channel1 DMA2 Channel 1 global Interrupt 56 DMA2_Channel2 DMA2 Channel 2 global Interrupt 57 DMA2_Channel3 DMA2 Channel 3 global Interrupt 58 DMA2_Channel4 DMA2 Channel 4 global Interrupt 59 DMA2_Channel5 DMA2 Channel 5 global Interrupt 60 DMA2_Channel6 DMA2 Channel 6 global Interrupt 68 DMA2_Channel7 DMA2 Channel 7 global Interrupt 69 EXTI External interrupt/event controller EXTI 0x40010400 0x0 0x400 registers PVD_PVM PVD through EXTI line detection 1 EXTI0 EXTI Line 0 interrupt 6 EXTI1 EXTI Line 1 interrupt 7 EXTI2 EXTI Line 2 interrupt 8 EXTI3 EXTI Line 3 interrupt 9 EXTI4 EXTI Line4 interrupt 10 EXTI9_5 EXTI Line5 to Line9 interrupts 23 EXTI15_10 EXTI Lines 10 to 15 interrupts 40 FPU Floating point unit interrupt 81 IMR1 IMR1 Interrupt mask register 0x0 0x20 read-write 0xFF820000 MR0 Interrupt Mask on line 0 0 1 InterruptMask Masked Interrupt request line is masked 0 Unmasked Interrupt request line is unmasked 1 MR1 Interrupt Mask on line 1 1 1 MR2 Interrupt Mask on line 2 2 1 MR3 Interrupt Mask on line 3 3 1 MR4 Interrupt Mask on line 4 4 1 MR5 Interrupt Mask on line 5 5 1 MR6 Interrupt Mask on line 6 6 1 MR7 Interrupt Mask on line 7 7 1 MR8 Interrupt Mask on line 8 8 1 MR9 Interrupt Mask on line 9 9 1 MR10 Interrupt Mask on line 10 10 1 MR11 Interrupt Mask on line 11 11 1 MR12 Interrupt Mask on line 12 12 1 MR13 Interrupt Mask on line 13 13 1 MR14 Interrupt Mask on line 14 14 1 MR15 Interrupt Mask on line 15 15 1 MR16 Interrupt Mask on line 16 16 1 MR17 Interrupt Mask on line 17 17 1 MR18 Interrupt Mask on line 18 18 1 MR19 Interrupt Mask on line 19 19 1 MR20 Interrupt Mask on line 20 20 1 MR21 Interrupt Mask on line 21 21 1 MR22 Interrupt Mask on line 22 22 1 MR23 Interrupt Mask on line 23 23 1 MR24 Interrupt Mask on line 24 24 1 MR25 Interrupt Mask on line 25 25 1 MR26 Interrupt Mask on line 26 26 1 MR27 Interrupt Mask on line 27 27 1 MR28 Interrupt Mask on line 28 28 1 MR29 Interrupt Mask on line 29 29 1 MR30 Interrupt Mask on line 30 30 1 MR31 Interrupt Mask on line 31 31 1 EMR1 EMR1 Event mask register 0x4 0x20 read-write 0x00000000 MR0 Event Mask on line 0 0 1 EventMask Masked Event request line is masked 0 Unmasked Event request line is unmasked 1 MR1 Event Mask on line 1 1 1 MR2 Event Mask on line 2 2 1 MR3 Event Mask on line 3 3 1 MR4 Event Mask on line 4 4 1 MR5 Event Mask on line 5 5 1 MR6 Event Mask on line 6 6 1 MR7 Event Mask on line 7 7 1 MR8 Event Mask on line 8 8 1 MR9 Event Mask on line 9 9 1 MR10 Event Mask on line 10 10 1 MR11 Event Mask on line 11 11 1 MR12 Event Mask on line 12 12 1 MR13 Event Mask on line 13 13 1 MR14 Event Mask on line 14 14 1 MR15 Event Mask on line 15 15 1 MR16 Event Mask on line 16 16 1 MR17 Event Mask on line 17 17 1 MR18 Event Mask on line 18 18 1 MR19 Event Mask on line 19 19 1 MR20 Event Mask on line 20 20 1 MR21 Event Mask on line 21 21 1 MR22 Event Mask on line 22 22 1 MR23 Event Mask on line 23 23 1 MR24 Event Mask on line 24 24 1 MR25 Event Mask on line 25 25 1 MR26 Event Mask on line 26 26 1 MR27 Event Mask on line 27 27 1 MR28 Event Mask on line 28 28 1 MR29 Event Mask on line 29 29 1 MR30 Event Mask on line 30 30 1 MR31 Event Mask on line 31 31 1 RTSR1 RTSR1 Rising Trigger selection register 0x8 0x20 read-write 0x00000000 TR0 Rising trigger event configuration of line 0 0 1 RisingTrigger Disabled Rising edge trigger is disabled 0 Enabled Rising edge trigger is enabled 1 TR1 Rising trigger event configuration of line 1 1 1 TR2 Rising trigger event configuration of line 2 2 1 TR3 Rising trigger event configuration of line 3 3 1 TR4 Rising trigger event configuration of line 4 4 1 TR5 Rising trigger event configuration of line 5 5 1 TR6 Rising trigger event configuration of line 6 6 1 TR7 Rising trigger event configuration of line 7 7 1 TR8 Rising trigger event configuration of line 8 8 1 TR9 Rising trigger event configuration of line 9 9 1 TR10 Rising trigger event configuration of line 10 10 1 TR11 Rising trigger event configuration of line 11 11 1 TR12 Rising trigger event configuration of line 12 12 1 TR13 Rising trigger event configuration of line 13 13 1 TR14 Rising trigger event configuration of line 14 14 1 TR15 Rising trigger event configuration of line 15 15 1 TR16 Rising trigger event configuration of line 16 16 1 TR18 Rising trigger event configuration of line 18 18 1 TR19 Rising trigger event configuration of line 19 19 1 TR20 Rising trigger event configuration of line 20 20 1 TR21 Rising trigger event configuration of line 21 21 1 TR22 Rising trigger event configuration of line 22 22 1 FTSR1 FTSR1 Falling Trigger selection register 0xC 0x20 read-write 0x00000000 TR0 Falling trigger event configuration of line 0 0 1 FallingTrigger Disabled Falling edge trigger is disabled 0 Enabled Falling edge trigger is enabled 1 TR1 Falling trigger event configuration of line 1 1 1 TR2 Falling trigger event configuration of line 2 2 1 TR3 Falling trigger event configuration of line 3 3 1 TR4 Falling trigger event configuration of line 4 4 1 TR5 Falling trigger event configuration of line 5 5 1 TR6 Falling trigger event configuration of line 6 6 1 TR7 Falling trigger event configuration of line 7 7 1 TR8 Falling trigger event configuration of line 8 8 1 TR9 Falling trigger event configuration of line 9 9 1 TR10 Falling trigger event configuration of line 10 10 1 TR11 Falling trigger event configuration of line 11 11 1 TR12 Falling trigger event configuration of line 12 12 1 TR13 Falling trigger event configuration of line 13 13 1 TR14 Falling trigger event configuration of line 14 14 1 TR15 Falling trigger event configuration of line 15 15 1 TR16 Falling trigger event configuration of line 16 16 1 TR18 Falling trigger event configuration of line 18 18 1 TR19 Falling trigger event configuration of line 19 19 1 TR20 Falling trigger event configuration of line 20 20 1 TR21 Falling trigger event configuration of line 21 21 1 TR22 Falling trigger event configuration of line 22 22 1 SWIER1 SWIER1 Software interrupt event register 0x10 0x20 read-write 0x00000000 SWIER0 Software Interrupt on line 0 0 1 SoftwareInterrupt write Pend Generates an interrupt request 1 SWIER1 Software Interrupt on line 1 1 1 SWIER2 Software Interrupt on line 2 2 1 SWIER3 Software Interrupt on line 3 3 1 SWIER4 Software Interrupt on line 4 4 1 SWIER5 Software Interrupt on line 5 5 1 SWIER6 Software Interrupt on line 6 6 1 SWIER7 Software Interrupt on line 7 7 1 SWIER8 Software Interrupt on line 8 8 1 SWIER9 Software Interrupt on line 9 9 1 SWIER10 Software Interrupt on line 10 10 1 SWIER11 Software Interrupt on line 11 11 1 SWIER12 Software Interrupt on line 12 12 1 SWIER13 Software Interrupt on line 13 13 1 SWIER14 Software Interrupt on line 14 14 1 SWIER15 Software Interrupt on line 15 15 1 SWIER16 Software Interrupt on line 16 16 1 SWIER18 Software Interrupt on line 18 18 1 SWIER19 Software Interrupt on line 19 19 1 SWIER20 Software Interrupt on line 20 20 1 SWIER21 Software Interrupt on line 21 21 1 SWIER22 Software Interrupt on line 22 22 1 PR1 PR1 Pending register 0x14 0x20 read-write 0x00000000 PR0 Pending bit 0 0 1 oneToClear PR0R read NotPending No trigger request occurred 0 Pending Selected trigger request occurred 1 PR0W write Clear Clears pending bit 1 PR1 Pending bit 1 1 1 oneToClear read write PR2 Pending bit 2 2 1 oneToClear read write PR3 Pending bit 3 3 1 oneToClear read write PR4 Pending bit 4 4 1 oneToClear read write PR5 Pending bit 5 5 1 oneToClear read write PR6 Pending bit 6 6 1 oneToClear read write PR7 Pending bit 7 7 1 oneToClear read write PR8 Pending bit 8 8 1 oneToClear read write PR9 Pending bit 9 9 1 oneToClear read write PR10 Pending bit 10 10 1 oneToClear read write PR11 Pending bit 11 11 1 oneToClear read write PR12 Pending bit 12 12 1 oneToClear read write PR13 Pending bit 13 13 1 oneToClear read write PR14 Pending bit 14 14 1 oneToClear read write PR15 Pending bit 15 15 1 oneToClear read write PR16 Pending bit 16 16 1 oneToClear read write PR18 Pending bit 18 18 1 oneToClear read write PR19 Pending bit 19 19 1 oneToClear read write PR20 Pending bit 20 20 1 oneToClear read write PR21 Pending bit 21 21 1 oneToClear read write PR22 Pending bit 22 22 1 oneToClear read write IMR2 IMR2 Interrupt mask register 0x20 0x20 read-write 0x00000087 MR32 Interrupt Mask on external/internal line 32 0 1 InterruptMask Masked Interrupt request line is masked 0 Unmasked Interrupt request line is unmasked 1 MR33 Interrupt Mask on external/internal line 33 1 1 MR34 Interrupt Mask on external/internal line 34 2 1 MR35 Interrupt Mask on external/internal line 35 3 1 MR36 Interrupt Mask on external/internal line 36 4 1 MR37 Interrupt Mask on external/internal line 37 5 1 MR38 Interrupt Mask on external/internal line 38 6 1 MR39 Interrupt Mask on external/internal line 39 7 1 EMR2 EMR2 Event mask register 0x24 0x20 read-write 0x00000000 MR32 Event mask on external/internal line 32 0 1 EventMask Masked Event request line is masked 0 Unmasked Event request line is unmasked 1 MR33 Event mask on external/internal line 33 1 1 MR34 Event mask on external/internal line 34 2 1 MR35 Event mask on external/internal line 35 3 1 MR36 Event mask on external/internal line 36 4 1 MR37 Event mask on external/internal line 37 5 1 MR38 Event mask on external/internal line 38 6 1 MR39 Event mask on external/internal line 39 7 1 RTSR2 RTSR2 Rising Trigger selection register 0x28 0x20 read-write 0x00000000 RT35 Rising trigger event configuration bit of line 35 3 1 RisingTrigger Disabled Rising edge trigger is disabled 0 Enabled Rising edge trigger is enabled 1 RT36 Rising trigger event configuration bit of line 36 4 1 RT37 Rising trigger event configuration bit of line 37 5 1 RT38 Rising trigger event configuration bit of line 38 6 1 FTSR2 FTSR2 Falling Trigger selection register 0x2C 0x20 read-write 0x00000000 FT35 Falling trigger event configuration bit of line 35 3 1 FallingTrigger Disabled Falling edge trigger is disabled 0 Enabled Falling edge trigger is enabled 1 FT36 Falling trigger event configuration bit of line 36 4 1 FT37 Falling trigger event configuration bit of line 37 5 1 FT38 Falling trigger event configuration bit of line 38 6 1 SWIER2 SWIER2 Software interrupt event register 0x30 0x20 read-write 0x00000000 SWI35 Software interrupt on line 35 3 1 SoftwareInterrupt write Pend Generates an interrupt request 1 SWI36 Software interrupt on line 36 4 1 SWI37 Software interrupt on line 37 5 1 SWI38 Software interrupt on line 38 6 1 PR2 PR2 Pending register 0x34 0x20 read-write 0x00000000 PIF35 Pending interrupt flag on line 35 3 1 oneToClear PIF35R read NotPending No trigger request occurred 0 Pending Selected trigger request occurred 1 PIF35W write Clear Clears pending bit 1 PIF36 Pending interrupt flag on line 36 4 1 oneToClear read write PIF37 Pending interrupt flag on line 37 5 1 oneToClear read write PIF38 Pending interrupt flag on line 38 6 1 oneToClear read write FIREWALL Firewall Firewall 0x40011C00 0x0 0x400 registers CSSA CSSA Code segment start address 0x0 0x20 read-write 0x00000000 ADD code segment start address 8 16 0 65535 CSL CSL Code segment length 0x4 0x20 read-write 0x00000000 LENG code segment length 8 14 0 16383 NVDSSA NVDSSA Non-volatile data segment start address 0x8 0x20 read-write 0x00000000 ADD Non-volatile data segment start address 8 16 0 65535 NVDSL NVDSL Non-volatile data segment length 0xC 0x20 read-write 0x00000000 LENG Non-volatile data segment length 8 14 0 16383 VDSSA VDSSA Volatile data segment start address 0x10 0x20 read-write 0x00000000 ADD Volatile data segment start address 6 10 0 1023 VDSL VDSL Volatile data segment length 0x14 0x20 read-write 0x00000000 LENG Non-volatile data segment length 6 10 0 1023 CR CR Configuration register 0x20 0x20 read-write 0x00000000 VDE Volatile data execution 2 1 VDER read NotExecutable Volatile data segment cannot be executed if VDS = 0 0 Executable Volatile data segment is declared executable whatever VDS bit value 1 VDEW write Reset Resets volatile data execution bit 0 VDS Volatile data shared 1 1 VDSR read NotShared Volatile data segment is not shared and cannot be hit by a non protected executable code when the Firewall is closed 0 Shared Volatile data segment is shared with non protected application code 1 VDSW write Reset Resets volatile data shared bit 0 FPA Firewall pre alarm 0 1 FPAW write PreArmReset Any code executed outside the protected segment when the Firewall is opened will generate a system reset 0 PreArmSet Any code executed outside the protected segment will close the Firewall 1 FLASH Flash Flash 0x40022000 0x0 0x400 registers FLASH Flash global interrupt 4 ACR ACR Access control register 0x0 0x20 read-write 0x00000600 LATENCY Latency 0 3 PRFTEN Prefetch enable 8 1 ICEN Instruction cache enable 9 1 DCEN Data cache enable 10 1 ICRST Instruction cache reset 11 1 DCRST Data cache reset 12 1 RUN_PD Flash Power-down mode during Low-power run mode 13 1 SLEEP_PD Flash Power-down mode during Low-power sleep mode 14 1 PDKEYR PDKEYR Power down key register 0x4 0x20 write-only 0x00000000 PDKEYR RUN_PD in FLASH_ACR key 0 32 KEYR KEYR Flash key register 0x8 0x20 write-only 0x00000000 KEYR KEYR 0 32 OPTKEYR OPTKEYR Option byte key register 0xC 0x20 write-only 0x00000000 OPTKEYR Option byte key 0 32 SR SR Status register 0x10 0x20 0x00000000 EOP End of operation 0 1 read-write OPERR Operation error 1 1 read-write PROGERR Programming error 3 1 read-write WRPERR Write protected error 4 1 read-write PGAERR Programming alignment error 5 1 read-write SIZERR Size error 6 1 read-write PGSERR Programming sequence error 7 1 read-write MISERR Fast programming data miss error 8 1 read-write FASTERR Fast programming error 9 1 read-write RDERR PCROP read error 14 1 read-write OPTVERR Option validity error 15 1 read-write BSY Busy 16 1 read-only CR CR Flash control register 0x14 0x20 read-write 0xC0000000 PG Programming 0 1 PER Page erase 1 1 MER1 Bank 1 Mass erase 2 1 PNB Page number 3 8 BKER Bank erase 11 1 MER2 Bank 2 Mass erase 15 1 START Start 16 1 OPTSTRT Options modification start 17 1 FSTPG Fast programming 18 1 EOPIE End of operation interrupt enable 24 1 ERRIE Error interrupt enable 25 1 RDERRIE PCROP read error interrupt enable 26 1 OBL_LAUNCH Force the option byte loading 27 1 OPTLOCK Options Lock 30 1 LOCK FLASH_CR Lock 31 1 ECCR ECCR Flash ECC register 0x18 0x20 0x00000000 ADDR_ECC ECC fail address 0 19 read-only BK_ECC ECC fail bank 19 1 read-only SYSF_ECC System Flash ECC fail 20 1 read-only ECCIE ECC correction interrupt enable 24 1 read-write ECCC ECC correction 30 1 read-write ECCD ECC detection 31 1 read-write OPTR OPTR Flash option register 0x20 0x20 read-write 0x00000000 RDP Read protection level 0 8 BOR_LEV BOR reset Level 8 3 nRST_STOP nRST_STOP 12 1 nRST_STDBY nRST_STDBY 13 1 nRST_SHDW nRST_SHDW 14 1 IWDG_SW Independent watchdog selection 16 1 IWDG_STOP Independent watchdog counter freeze in Stop mode 17 1 IWDG_STDBY Independent watchdog counter freeze in Standby mode 18 1 WWDG_SW Window watchdog selection 19 1 nBOOT1 Boot configuration 23 1 SRAM2_PE SRAM2 parity check enable 24 1 SRAM2_RST SRAM2 Erase when system reset 25 1 nSWBOOT0 Software BOOT0 26 1 nBOOT0 nBOOT0 option bit 27 1 PCROP1SR PCROP1SR Flash Bank 1 PCROP Start address register 0x24 0x20 read-write 0xFFFF0000 PCROP1_STRT Bank 1 PCROP area start offset 0 16 PCROP1ER PCROP1ER Flash Bank 1 PCROP End address register 0x28 0x20 read-write 0x0FFF0000 PCROP1_END Bank 1 PCROP area end offset 0 16 PCROP_RDP PCROP area preserved when RDP level decreased 31 1 WRP1AR WRP1AR Flash Bank 1 WRP area A address register 0x2C 0x20 read-write 0xFF00FF00 WRP1A_STRT WRP first area A start offset 0 8 WRP1A_END WRP first area A end offset 16 8 WRP1BR WRP1BR Flash Bank 1 WRP area B address register 0x30 0x20 read-write 0xFF00FF00 WRP1B_END Bank 1 WRP second area B end offset 16 8 WRP1B_STRT Bank 1 WRP second area B start offset 0 8 I2C1 Inter-integrated circuit I2C 0x40005400 0x0 0x400 registers I2C1_EV I2C1 event interrupt 31 I2C1_ER I2C1 error interrupt 32 CR1 CR1 Control register 1 0x0 0x20 read-write 0x00000000 PE Peripheral enable 0 1 PE Disabled Peripheral disabled 0 Enabled Peripheral enabled 1 TXIE TX Interrupt enable 1 1 TXIE Disabled Transmit (TXIS) interrupt disabled 0 Enabled Transmit (TXIS) interrupt enabled 1 RXIE RX Interrupt enable 2 1 RXIE Disabled Receive (RXNE) interrupt disabled 0 Enabled Receive (RXNE) interrupt enabled 1 ADDRIE Address match interrupt enable (slave only) 3 1 ADDRIE Disabled Address match (ADDR) interrupts disabled 0 Enabled Address match (ADDR) interrupts enabled 1 NACKIE Not acknowledge received interrupt enable 4 1 NACKIE Disabled Not acknowledge (NACKF) received interrupts disabled 0 Enabled Not acknowledge (NACKF) received interrupts enabled 1 STOPIE STOP detection Interrupt enable 5 1 STOPIE Disabled Stop detection (STOPF) interrupt disabled 0 Enabled Stop detection (STOPF) interrupt enabled 1 TCIE Transfer Complete interrupt enable 6 1 TCIE Disabled Transfer Complete interrupt disabled 0 Enabled Transfer Complete interrupt enabled 1 ERRIE Error interrupts enable 7 1 ERRIE Disabled Error detection interrupts disabled 0 Enabled Error detection interrupts enabled 1 DNF Digital noise filter 8 4 DNF NoFilter Digital filter disabled 0 Filter1 Digital filter enabled and filtering capability up to 1 tI2CCLK 1 Filter2 Digital filter enabled and filtering capability up to 2 tI2CCLK 2 Filter3 Digital filter enabled and filtering capability up to 3 tI2CCLK 3 Filter4 Digital filter enabled and filtering capability up to 4 tI2CCLK 4 Filter5 Digital filter enabled and filtering capability up to 5 tI2CCLK 5 Filter6 Digital filter enabled and filtering capability up to 6 tI2CCLK 6 Filter7 Digital filter enabled and filtering capability up to 7 tI2CCLK 7 Filter8 Digital filter enabled and filtering capability up to 8 tI2CCLK 8 Filter9 Digital filter enabled and filtering capability up to 9 tI2CCLK 9 Filter10 Digital filter enabled and filtering capability up to 10 tI2CCLK 10 Filter11 Digital filter enabled and filtering capability up to 11 tI2CCLK 11 Filter12 Digital filter enabled and filtering capability up to 12 tI2CCLK 12 Filter13 Digital filter enabled and filtering capability up to 13 tI2CCLK 13 Filter14 Digital filter enabled and filtering capability up to 14 tI2CCLK 14 Filter15 Digital filter enabled and filtering capability up to 15 tI2CCLK 15 ANFOFF Analog noise filter OFF 12 1 ANFOFF Enabled Analog noise filter enabled 0 Disabled Analog noise filter disabled 1 TXDMAEN DMA transmission requests enable 14 1 TXDMAEN Disabled DMA mode disabled for transmission 0 Enabled DMA mode enabled for transmission 1 RXDMAEN DMA reception requests enable 15 1 RXDMAEN Disabled DMA mode disabled for reception 0 Enabled DMA mode enabled for reception 1 SBC Slave byte control 16 1 SBC Disabled Slave byte control disabled 0 Enabled Slave byte control enabled 1 NOSTRETCH Clock stretching disable 17 1 NOSTRETCH Enabled Clock stretching enabled 0 Disabled Clock stretching disabled 1 WUPEN Wakeup from STOP enable 18 1 WUPEN Disabled Wakeup from Stop mode disabled 0 Enabled Wakeup from Stop mode enabled 1 GCEN General call enable 19 1 GCEN Disabled General call disabled. Address 0b00000000 is NACKed 0 Enabled General call enabled. Address 0b00000000 is ACKed 1 SMBHEN SMBus Host address enable 20 1 SMBHEN Disabled Host address disabled. Address 0b0001000x is NACKed 0 Enabled Host address enabled. Address 0b0001000x is ACKed 1 SMBDEN SMBus Device Default address enable 21 1 SMBDEN Disabled Device default address disabled. Address 0b1100001x is NACKed 0 Enabled Device default address enabled. Address 0b1100001x is ACKed 1 ALERTEN SMBUS alert enable 22 1 ALERTEN Disabled In device mode (SMBHEN=Disabled) Releases SMBA pin high and Alert Response Address Header disabled (0001100x) followed by NACK. In host mode (SMBHEN=Enabled) SMBus Alert pin (SMBA) not supported 0 Enabled In device mode (SMBHEN=Disabled) Drives SMBA pin low and Alert Response Address Header enabled (0001100x) followed by ACK.In host mode (SMBHEN=Enabled) SMBus Alert pin (SMBA) supported 1 PECEN PEC enable 23 1 PECEN Disabled PEC calculation disabled 0 Enabled PEC calculation enabled 1 CR2 CR2 Control register 2 0x4 0x20 read-write 0x00000000 PECBYTE Packet error checking byte 26 1 oneToSet PECBYTER read NoPec No PEC transfer 0 Pec PEC transmission/reception is requested 1 PECBYTEW write Pec PEC transmission/reception is requested 1 AUTOEND Automatic end mode (master mode) 25 1 AUTOEND Software Software end mode: TC flag is set when NBYTES data are transferred, stretching SCL low 0 Automatic Automatic end mode: a STOP condition is automatically sent when NBYTES data are transferred 1 RELOAD NBYTES reload mode 24 1 RELOAD Completed The transfer is completed after the NBYTES data transfer (STOP or RESTART will follow) 0 NotCompleted The transfer is not completed after the NBYTES data transfer (NBYTES will be reloaded) 1 NBYTES Number of bytes 16 8 0 255 NACK NACK generation (slave mode) 15 1 oneToSet NACKR read Ack an ACK is sent after current received byte 0 Nack a NACK is sent after current received byte 1 NACKW write Nack a NACK is sent after current received byte 1 STOP Stop generation (master mode) 14 1 oneToSet STOPR read NoStop No Stop generation 0 Stop Stop generation after current byte transfer 1 STOPW write Stop Stop generation after current byte transfer 1 START Start generation 13 1 oneToSet STARTR read NoStart No Start generation 0 Start Restart/Start generation 1 STARTW write Start Restart/Start generation 1 HEAD10R 10-bit address header only read direction (master receiver mode) 12 1 HEAD10R Complete The master sends the complete 10 bit slave address read sequence 0 Partial The master only sends the 1st 7 bits of the 10 bit address, followed by Read direction 1 ADD10 10-bit addressing mode (master mode) 11 1 ADD10 Bit7 The master operates in 7-bit addressing mode 0 Bit10 The master operates in 10-bit addressing mode 1 RD_WRN Transfer direction (master mode) 10 1 RD_WRN Write Master requests a write transfer 0 Read Master requests a read transfer 1 SADD Slave address bit (master mode) 0 10 0 1023 OAR1 OAR1 Own address register 1 0x8 0x20 read-write 0x00000000 OA1 Interface address 0 10 0 1023 OA1MODE Own Address 1 10-bit mode 10 1 OA1MODE Bit7 Own address 1 is a 7-bit address 0 Bit10 Own address 1 is a 10-bit address 1 OA1EN Own Address 1 enable 15 1 OA1EN Disabled Own address 1 disabled. The received slave address OA1 is NACKed 0 Enabled Own address 1 enabled. The received slave address OA1 is ACKed 1 OAR2 OAR2 Own address register 2 0xC 0x20 read-write 0x00000000 OA2 Interface address 1 7 0 127 OA2MSK Own Address 2 masks 8 3 OA2MSK NoMask No mask 0 Mask1 OA2[1] is masked and don’t care. Only OA2[7:2] are compared 1 Mask2 OA2[2:1] are masked and don’t care. Only OA2[7:3] are compared 2 Mask3 OA2[3:1] are masked and don’t care. Only OA2[7:4] are compared 3 Mask4 OA2[4:1] are masked and don’t care. Only OA2[7:5] are compared 4 Mask5 OA2[5:1] are masked and don’t care. Only OA2[7:6] are compared 5 Mask6 OA2[6:1] are masked and don’t care. Only OA2[7] is compared. 6 Mask7 OA2[7:1] are masked and don’t care. No comparison is done, and all (except reserved) 7-bit received addresses are acknowledged 7 OA2EN Own Address 2 enable 15 1 OA2EN Disabled Own address 2 disabled. The received slave address OA2 is NACKed 0 Enabled Own address 2 enabled. The received slave address OA2 is ACKed 1 TIMINGR TIMINGR Timing register 0x10 0x20 read-write 0x00000000 SCLL SCL low period (master mode) 0 8 0 255 SCLH SCL high period (master mode) 8 8 0 255 SDADEL Data hold time 16 4 0 15 SCLDEL Data setup time 20 4 0 15 PRESC Timing prescaler 28 4 0 15 TIMEOUTR TIMEOUTR Status register 1 0x14 0x20 read-write 0x00000000 TIMEOUTA Bus timeout A 0 12 0 4095 TIDLE Idle clock timeout detection 12 1 TIDLE Disabled TIMEOUTA is used to detect SCL low timeout 0 Enabled TIMEOUTA is used to detect both SCL and SDA high timeout (bus idle condition) 1 TIMOUTEN Clock timeout enable 15 1 TIMOUTEN Disabled SCL timeout detection is disabled 0 Enabled SCL timeout detection is enabled 1 TIMEOUTB Bus timeout B 16 12 0 4095 TEXTEN Extended clock timeout enable 31 1 TEXTEN Disabled Extended clock timeout detection is disabled 0 Enabled Extended clock timeout detection is enabled 1 ISR ISR Interrupt and Status register 0x18 0x20 0x00000001 ADDCODE Address match code (Slave mode) 17 7 read-only 0 127 DIR Transfer direction (Slave mode) 16 1 read-only DIR Write Write transfer, slave enters receiver mode 0 Read Read transfer, slave enters transmitter mode 1 BUSY Bus busy 15 1 read-only BUSY NotBusy No communication is in progress on the bus 0 Busy A communication is in progress on the bus 1 ALERT SMBus alert 13 1 read-only ALERT NoAlert SMBA alert is not detected 0 Alert SMBA alert event is detected on SMBA pin 1 TIMEOUT Timeout or t_low detection flag 12 1 read-only TIMEOUT NoTimeout No timeout occured 0 Timeout Timeout occured 1 PECERR PEC Error in reception 11 1 read-only PECERR Match Received PEC does match with PEC register 0 NoMatch Received PEC does not match with PEC register 1 OVR Overrun/Underrun (slave mode) 10 1 read-only OVR NoOverrun No overrun/underrun error occurs 0 Overrun slave mode with NOSTRETCH=1, when an overrun/underrun error occurs 1 ARLO Arbitration lost 9 1 read-only ARLO NotLost No arbitration lost 0 Lost Arbitration lost 1 BERR Bus error 8 1 read-only BERR NoError No bus error 0 Error Misplaced Start and Stop condition is detected 1 TCR Transfer Complete Reload 7 1 read-only TCR NotComplete Transfer is not complete 0 Complete NBYTES has been transfered 1 TC Transfer Complete (master mode) 6 1 read-only TC NotComplete Transfer is not complete 0 Complete NBYTES has been transfered 1 STOPF Stop detection flag 5 1 read-only STOPF NoStop No Stop condition detected 0 Stop Stop condition detected 1 NACKF Not acknowledge received flag 4 1 read-only NACKF NoNack No NACK has been received 0 Nack NACK has been received 1 ADDR Address matched (slave mode) 3 1 read-only ADDR NotMatch Adress mismatched or not received 0 Match Received slave address matched with one of the enabled slave addresses 1 RXNE Receive data register not empty (receivers) 2 1 read-only RXNE Empty The RXDR register is empty 0 NotEmpty Received data is copied into the RXDR register, and is ready to be read 1 TXIS Transmit interrupt status (transmitters) 1 1 read-write oneToSet TXISR read NotEmpty The TXDR register is not empty 0 Empty The TXDR register is empty and the data to be transmitted must be written in the TXDR register 1 TXISW write Trigger Generate a TXIS event 1 TXE Transmit data register empty (transmitters) 0 1 read-write oneToSet TXER read NotEmpty TXDR register not empty 0 Empty TXDR register empty 1 TXEW write Flush Flush the transmit data register 1 ICR ICR Interrupt clear register 0x1C 0x20 write-only 0x00000000 ALERTCF Alert flag clear 13 1 oneToClear ALERTCF Clear Clears the ALERT flag in ISR register 1 TIMOUTCF Timeout detection flag clear 12 1 oneToClear TIMOUTCF Clear Clears the TIMOUT flag in ISR register 1 PECCF PEC Error flag clear 11 1 oneToClear PECCF Clear Clears the PEC flag in ISR register 1 OVRCF Overrun/Underrun flag clear 10 1 oneToClear OVRCF Clear Clears the OVR flag in ISR register 1 ARLOCF Arbitration lost flag clear 9 1 oneToClear ARLOCF Clear Clears the ARLO flag in ISR register 1 BERRCF Bus error flag clear 8 1 oneToClear BERRCF Clear Clears the BERR flag in ISR register 1 STOPCF Stop detection flag clear 5 1 oneToClear STOPCF Clear Clears the STOP flag in ISR register 1 NACKCF Not Acknowledge flag clear 4 1 oneToClear NACKCF Clear Clears the NACK flag in ISR register 1 ADDRCF Address Matched flag clear 3 1 oneToClear ADDRCF Clear Clears the ADDR flag in ISR register 1 PECR PECR PEC register 0x20 0x20 read-only 0x00000000 PEC Packet error checking register 0 8 0 255 RXDR RXDR Receive data register 0x24 0x20 read-only 0x00000000 RXDATA 8-bit receive data 0 8 0 255 TXDR TXDR Transmit data register 0x28 0x20 read-write 0x00000000 TXDATA 8-bit transmit data 0 8 0 255 I2C2 0x40005800 I2C2_EV I2C2 event interrupt 33 I2C2_ER I2C2 error interrupt 34 I2C3 0x40005C00 I2C3_EV I2C3 event interrupt 72 I2C3_ER I2C3 error interrupt 73 IWDG Independent watchdog IWDG 0x40003000 0x0 0x400 registers KR KR Key register 0x0 0x10 write-only 0x00000000 KEY Key value (write only, read 0x0000) 0 16 PR PR Prescaler register 0x4 0x10 read-write 0x00000000 PR Prescaler divider 0 3 RLR RLR Reload register 0x8 0x10 read-write 0x00000FFF RL Watchdog counter reload value 0 12 SR SR Status register 0xC 0x10 read-only 0x00000000 WVU Watchdog counter window value update 2 1 RVU Watchdog counter reload value update 1 1 PVU Watchdog prescaler value update 0 1 WINR WINR Window register 0x10 0x10 read-write 0x00000FFF WIN Watchdog counter window value 0 12 LPTIM1 Low power timer LPTIM 0x40007C00 0x0 0x400 registers LPTIM1 LP TIM1 interrupt 65 ISR ISR Interrupt and Status Register 0x0 0x20 read-only 0x00000000 REPOK REPOK 8 1 REPOKR Set Repetition register update OK 1 UE UE 7 1 UER Set LPTIM update event occurred 1 DOWN Counter direction change up to down 6 1 DOWNR Set Counter direction change up to down 1 UP Counter direction change down to up 5 1 UPR Set Counter direction change down to up 1 ARROK Autoreload register update OK 4 1 ARROKR Set Autoreload register update OK 1 CMPOK Compare register update OK 3 1 CMPOKR Set Compare register update OK 1 EXTTRIG External trigger edge event 2 1 EXTTRIGR Set External trigger edge event 1 ARRM Autoreload match 1 1 ARRMR Set Autoreload match 1 CMPM Compare match 0 1 CMPMR Set Compare match 1 ICR ICR Interrupt Clear Register 0x4 0x20 write-only 0x00000000 REPOKCF REPOKCF 8 1 REPOKCFW Clear Clear REPOK flag 1 UECF UECF 7 1 UECFW Clear Clear update event flag 1 DOWNCF Direction change to down Clear Flag 6 1 DOWNCFW Clear Direction change to down Clear Flag 1 UPCF Direction change to UP Clear Flag 5 1 UPCFW Clear Direction change to up Clear Flag 1 ARROKCF Autoreload register update OK Clear Flag 4 1 ARROKCFW Clear Autoreload register update OK Clear Flag 1 CMPOKCF Compare register update OK Clear Flag 3 1 CMPOKCFW Clear Compare register update OK Clear Flag 1 EXTTRIGCF External trigger valid edge Clear Flag 2 1 EXTTRIGCFW Clear External trigger valid edge Clear Flag 1 ARRMCF Autoreload match Clear Flag 1 1 ARRMCFW Clear Autoreload match Clear Flag 1 CMPMCF compare match Clear Flag 0 1 CMPMCFW Clear Compare match Clear Flag 1 IER IER Interrupt Enable Register 0x8 0x20 read-write 0x00000000 REPOKIE REPOKIE 8 1 REPOKIE Disabled Repetition register update OK interrupt disabled 0 Enabled Repetition register update OK interrupt enabled 1 UEIE UEIE 7 1 UEIE Disabled Update event interrupt disabled 0 Enabled Update event interrupt enabled 1 DOWNIE Direction change to down Interrupt Enable 6 1 DOWNIE Disabled DOWN interrupt disabled 0 Enabled DOWN interrupt enabled 1 UPIE Direction change to UP Interrupt Enable 5 1 UPIE Disabled UP interrupt disabled 0 Enabled UP interrupt enabled 1 ARROKIE Autoreload register update OK Interrupt Enable 4 1 ARROKIE Disabled ARROK interrupt disabled 0 Enabled ARROK interrupt enabled 1 CMPOKIE Compare register update OK Interrupt Enable 3 1 CMPOKIE Disabled CMPOK interrupt disabled 0 Enabled CMPOK interrupt enabled 1 EXTTRIGIE External trigger valid edge Interrupt Enable 2 1 EXTTRIGIE Disabled EXTTRIG interrupt disabled 0 Enabled EXTTRIG interrupt enabled 1 ARRMIE Autoreload match Interrupt Enable 1 1 ARRMIE Disabled ARRM interrupt disabled 0 Enabled ARRM interrupt enabled 1 CMPMIE Compare match Interrupt Enable 0 1 CMPMIE Disabled CMPM interrupt disabled 0 Enabled CMPM interrupt enabled 1 CFGR CFGR Configuration Register 0xC 0x20 read-write 0x00000000 ENC Encoder mode enable 24 1 ENC Disabled Encoder mode disabled 0 Enabled Encoder mode enabled 1 COUNTMODE counter mode enabled 23 1 COUNTMODE Internal The counter is incremented following each internal clock pulse 0 External The counter is incremented following each valid clock pulse on the LPTIM external Input1 1 PRELOAD Registers update mode 22 1 PRELOAD Immediate Registers are updated after each APB bus write access 0 EndOfPeriod Registers are updated at the end of the current LPTIM period 1 WAVPOL Waveform shape polarity 21 1 WAVPOL Positive The LPTIM output reflects the compare results between LPTIM_ARR and LPTIM_CMP registers 0 Negative The LPTIM output reflects the inverse of the compare results between LPTIM_ARR and LPTIM_CMP registers 1 WAVE Waveform shape 20 1 WAVE Inactive Deactivate Set-once mode, PWM / One Pulse waveform (depending on OPMODE bit) 0 Active Activate the Set-once mode 1 TIMOUT Timeout enable 19 1 TIMOUT Disabled A trigger event arriving when the timer is already started will be ignored 0 Enabled A trigger event arriving when the timer is already started will reset and restart the counter 1 TRIGEN Trigger enable and polarity 17 2 TRIGEN SW Software trigger (counting start is initiated by software) 0 RisingEdge Rising edge is the active edge 1 FallingEdge Falling edge is the active edge 2 BothEdges Both edges are active edges 3 TRIGSEL Trigger selector 13 3 TRIGSEL Trig0 lptim_ext_trig0 0 Trig1 lptim_ext_trig1 1 Trig2 lptim_ext_trig2 2 Trig3 lptim_ext_trig3 3 Trig4 lptim_ext_trig4 4 Trig5 lptim_ext_trig5 5 Trig6 lptim_ext_trig6 6 Trig7 lptim_ext_trig7 7 PRESC Clock prescaler 9 3 PRESC Div1 /1 0 Div2 /2 1 Div4 /4 2 Div8 /8 3 Div16 /16 4 Div32 /32 5 Div64 /64 6 Div128 /128 7 TRGFLT Configurable digital filter for trigger 6 2 TRGFLT Immediate Any trigger active level change is considered as a valid trigger 0 Clocks2 Trigger active level change must be stable for at least 2 clock periods before it is considered as valid trigger 1 Clocks4 Trigger active level change must be stable for at least 4 clock periods before it is considered as valid trigger 2 Clocks8 Trigger active level change must be stable for at least 8 clock periods before it is considered as valid trigger 3 CKFLT Configurable digital filter for external clock 3 2 CKFLT Immediate Any external clock signal level change is considered as a valid transition 0 Clocks2 External clock signal level change must be stable for at least 2 clock periods before it is considered as valid transition 1 Clocks4 External clock signal level change must be stable for at least 4 clock periods before it is considered as valid transition 2 Clocks8 External clock signal level change must be stable for at least 8 clock periods before it is considered as valid transition 3 CKPOL Clock Polarity 1 2 CKPOL RisingEdge The rising edge is the active edge used for counting. If LPTIM is in encoder mode: Encoder sub-mode 1 is active. 0 FallingEdge The falling edge is the active edge used for counting. If LPTIM is in encoder mode: Encoder sub-mode 2 is active. 1 BothEdges Both edges are active edge. If LPTIM is in encoder mode: Encoder sub-mode 3 is active. 2 CKSEL Clock selector 0 1 CKSEL Internal LPTIM is clocked by internal clock source (APB clock or any of the embedded oscillators) 0 External LPTIM is clocked by an external clock source through the LPTIM external Input1 1 CR CR Control Register 0x10 0x20 read-write 0x00000000 RSTARE RSTARE 4 1 RSTARE Disabled CNT Register reads do not trigger reset 0 Enabled CNT Register reads trigger reset of LPTIM 1 COUNTRST COUNTRST 3 1 COUNTRSTR read Idle Triggering of reset is possible 0 Busy Reset in progress, do not write 1 to this field 1 COUNTRSTW write Reset Trigger synchronous reset of CNT (3 LPTimer core clock cycles) 1 CNTSTRT Timer start in continuous mode 2 1 CNTSTRTW write Start Timer start in Continuous mode 1 SNGSTRT LPTIM start in single mode 1 1 SNGSTRTW write Start LPTIM start in Single mode 1 ENABLE LPTIM Enable 0 1 ENABLE Disabled LPTIM is disabled 0 Enabled LPTIM is enabled 1 CMP CMP Compare Register 0x14 0x20 read-write 0x00000000 CMP Compare value 0 16 0 65535 ARR ARR Autoreload Register 0x18 0x20 read-write 0x00000001 ARR Auto reload value 0 16 0 65535 CNT CNT Counter Register 0x1C 0x20 read-only 0x00000000 CNT Counter value 0 16 0 65535 OR OR option register 0x20 0x20 read-write 0x00000000 OR_0 Option register bit 0 0 1 OR_1 Option register bit 1 1 1 CFGR2 CFGR2 configuration register 2 0x24 0x20 read-write 0x00000000 IN1SEL LPTIM input 1 selection 0 2 IN2SEL LPTIM input 2 selection 4 2 RCR RCR repetition register 0x28 0x20 read-write 0x00000000 REP Repetition register value 0 8 0 255 LPTIM2 0x40009400 LPTIM2 LPTIM2 global interrupt 66 LPUART1 Universal synchronous asynchronous receiver transmitter USART 0x40008000 0x0 0x400 registers LPUART1 LPUART1 global interrupt 70 CR1 CR1 Control register 1 0x0 0x20 read-write 0x00000000 M1 Word length 28 1 M1 M0 Use M0 to set the data bits 0 Bit7 1 start bit, 7 data bits, n stop bits 1 DEAT Driver Enable assertion time 21 5 0 31 DEDT Driver Enable de-assertion time 16 5 0 31 CMIE Character match interrupt enable 14 1 CMIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated when the CMF bit is set in the ISR register 1 MME Mute mode enable 13 1 MME Disabled Receiver in active mode permanently 0 Enabled Receiver can switch between mute mode and active mode 1 M0 Word length 12 1 M0 Bit8 1 start bit, 8 data bits, n stop bits 0 Bit9 1 start bit, 9 data bits, n stop bits 1 WAKE Receiver wakeup method 11 1 WAKE Idle Idle line 0 Address Address mask 1 PCE Parity control enable 10 1 PCE Disabled Parity control disabled 0 Enabled Parity control enabled 1 PS Parity selection 9 1 PS Even Even parity 0 Odd Odd parity 1 PEIE PE interrupt enable 8 1 PEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever PE=1 in the ISR register 1 TXEIE interrupt enable 7 1 TXEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever TXE=1 in the ISR register 1 TCIE Transmission complete interrupt enable 6 1 TCIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever TC=1 in the ISR register 1 RXNEIE RXNE interrupt enable 5 1 RXNEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever ORE=1 or RXNE=1 in the ISR register 1 IDLEIE IDLE interrupt enable 4 1 IDLEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever IDLE=1 in the ISR register 1 TE Transmitter enable 3 1 TE Disabled Transmitter is disabled 0 Enabled Transmitter is enabled 1 RE Receiver enable 2 1 RE Disabled Receiver is disabled 0 Enabled Receiver is enabled 1 UESM USART enable in Stop mode 1 1 UESM Disabled USART not able to wake up the MCU from Stop mode 0 Enabled USART able to wake up the MCU from Stop mode 1 UE USART enable 0 1 UE Disabled UART is disabled 0 Enabled UART is enabled 1 CR2 CR2 Control register 2 0x4 0x20 read-write 0x00000000 ADD Address of the USART node 24 8 0 255 MSBFIRST Most significant bit first 19 1 MSBFIRST LSB data is transmitted/received with data bit 0 first, following the start bit 0 MSB data is transmitted/received with MSB (bit 7/8/9) first, following the start bit 1 DATAINV Binary data inversion 18 1 DATAINV Positive Logical data from the data register are send/received in positive/direct logic 0 Negative Logical data from the data register are send/received in negative/inverse logic 1 TXINV TX pin active level inversion 17 1 TXINV Standard TX pin signal works using the standard logic levels 0 Inverted TX pin signal values are inverted 1 RXINV RX pin active level inversion 16 1 RXINV Standard RX pin signal works using the standard logic levels 0 Inverted RX pin signal values are inverted 1 SWAP Swap TX/RX pins 15 1 SWAP Standard TX/RX pins are used as defined in standard pinout 0 Swapped The TX and RX pins functions are swapped 1 STOP STOP bits 12 2 STOP Stop1 1 stop bit 0 Stop0p5 0.5 stop bit 1 Stop2 2 stop bit 2 Stop1p5 1.5 stop bit 3 ADDM7 7-bit Address Detection/4-bit Address Detection 4 1 ADDM7 Bit4 4-bit address detection 0 Bit7 7-bit address detection 1 CR3 CR3 Control register 3 0x8 0x20 read-write 0x00000000 WUFIE Wakeup from Stop mode interrupt enable 22 1 WUFIE Disabled Interrupt is inhibited 0 Enabled An USART interrupt is generated whenever WUF=1 in the ISR register 1 WUS Wakeup from Stop mode interrupt flag selection 20 2 WUS Address WUF active on address match 0 Start WuF active on Start bit detection 2 RXNE WUF active on RXNE 3 DEP Driver enable polarity selection 15 1 DEP High DE signal is active high 0 Low DE signal is active low 1 DEM Driver enable mode 14 1 DEM Disabled DE function is disabled 0 Enabled The DE signal is output on the RTS pin 1 DDRE DMA Disable on Reception Error 13 1 DDRE NotDisabled DMA is not disabled in case of reception error 0 Disabled DMA is disabled following a reception error 1 OVRDIS Overrun Disable 12 1 OVRDIS Enabled Overrun Error Flag, ORE, is set when received data is not read before receiving new data 0 Disabled Overrun functionality is disabled. If new data is received while the RXNE flag is still set the ORE flag is not set and the new received data overwrites the previous content of the RDR register 1 CTSIE CTS interrupt enable 10 1 CTSIE Disabled Interrupt is inhibited 0 Enabled An interrupt is generated whenever CTSIF=1 in the ISR register 1 CTSE CTS enable 9 1 CTSE Disabled CTS hardware flow control disabled 0 Enabled CTS mode enabled, data is only transmitted when the CTS input is asserted 1 RTSE RTS enable 8 1 RTSE Disabled RTS hardware flow control disabled 0 Enabled RTS output enabled, data is only requested when there is space in the receive buffer 1 DMAT DMA enable transmitter 7 1 DMAT Disabled DMA mode is disabled for transmission 0 Enabled DMA mode is enabled for transmission 1 DMAR DMA enable receiver 6 1 DMAR Disabled DMA mode is disabled for reception 0 Enabled DMA mode is enabled for reception 1 HDSEL Half-duplex selection 3 1 HDSEL NotSelected Half duplex mode is not selected 0 Selected Half duplex mode is selected 1 EIE Error interrupt enable 0 1 EIE Disabled Interrupt is inhibited 0 Enabled An interrupt is generated when FE=1 or ORE=1 or NF=1 in the ISR register 1 UCESM UCESM 23 1 BRR BRR Baud rate register 0xC 0x20 read-write 0x00000000 BRR BRR 0 20 0 1048575 RQR RQR Request register 0x18 0x20 write-only 0x00000000 RXFRQ Receive data flush request 3 1 RXFRQ Discard clears the RXNE flag. This allows to discard the received data without reading it, and avoid an overrun condition 1 MMRQ Mute mode request 2 1 MMRQ Mute Puts the USART in mute mode and sets the RWU flag 1 SBKRQ Send break request 1 1 SBKRQ Break sets the SBKF flag and request to send a BREAK on the line, as soon as the transmit machine is available 1 ISR ISR Interrupt & status register 0x1C 0x20 read-only 0x000000C0 REACK REACK 22 1 TEACK TEACK 21 1 WUF WUF 20 1 RWU RWU 19 1 RWU Active Receiver in Active mode 0 Mute Receiver in Mute mode 1 SBKF SBKF 18 1 SBKF NoBreak No break character transmitted 0 Break Break character transmitted 1 CMF CMF 17 1 CMF NoMatch No Character match detected 0 Match Character match detected 1 BUSY BUSY 16 1 BUSY Idle USART is idle (no reception) 0 Busy Reception on going 1 CTS CTS 10 1 CTS Set CTS line set 0 Reset CTS line reset 1 CTSIF CTSIF 9 1 CTSIF NotChanged No change occurred on the CTS status line 0 Changed A change occurred on the CTS status line 1 TXE TXE 7 1 TXE Full Transmit FIFO is full 0 NotFull Transmit FIFO is not full 1 TC TC 6 1 TC TxNotComplete Transmission is not complete 0 TxComplete Transmission is complete 1 RXNE RXNE 5 1 RXNE NoData Data is not received 0 DataReady Received data is ready to be read 1 IDLE IDLE 4 1 IDLE NoIdle No Idle Line is detected 0 Idle Idle Line is detected 1 ORE ORE 3 1 ORE NoOverrun No Overrun error 0 Overrun Overrun error is detected 1 NF NF 2 1 NF NoNoise No noise is detected 0 Noise Noise is detected 1 FE FE 1 1 FE NoError No Framing error is detected 0 Error Framing error or break character is detected 1 PE PE 0 1 PE NoError No parity error 0 Error Parity error 1 ICR ICR Interrupt flag clear register 0x20 0x20 write-only 0x00000000 WUCF Wakeup from Stop mode clear flag 20 1 oneToClear WUCF Clear Clears the WUF flag in the ISR register 1 CMCF Character match clear flag 17 1 oneToClear CMCF Clear Clears the CMF flag in the ISR register 1 CTSCF CTS clear flag 9 1 oneToClear CTSCF Clear Clears the CTSIF flag in the ISR register 1 TCCF Transmission complete clear flag 6 1 oneToClear TCCF Clear Clears the TC flag in the ISR register 1 IDLECF Idle line detected clear flag 4 1 oneToClear IDLECF Clear Clears the IDLE flag in the ISR register 1 ORECF Overrun error clear flag 3 1 oneToClear ORECF Clear Clears the ORE flag in the ISR register 1 NCF Noise detected clear flag 2 1 oneToClear NCF Clear Clears the NF flag in the ISR register 1 FECF Framing error clear flag 1 1 oneToClear FECF Clear Clears the FE flag in the ISR register 1 PECF Parity error clear flag 0 1 oneToClear PECF Clear Clears the PE flag in the ISR register 1 RDR RDR Receive data register 0x24 0x20 read-only 0x00000000 RDR Receive data value 0 9 0 511 TDR TDR Transmit data register 0x28 0x20 read-write 0x00000000 TDR Transmit data value 0 9 0 511 OPAMP Operational amplifiers OPAMP 0x40007800 0x0 0x400 registers OPAMP1_CSR OPAMP1_CSR OPAMP1 control/status register 0x0 0x20 read-write 0x00000000 OPAEN Operational amplifier Enable 0 1 OPAEN Disabled OpAmp disabled 0 Enabled OpAmp enabled 1 OPALPM Operational amplifier Low Power Mode 1 1 OPALPM NORMAL OpAmp in normal mode 0 LOW OpAmp in low power mode 1 OPAMODE Operational amplifier PGA mode 2 2 OPAMODE PGA_DISABLED internal PGA diabled 0 PGA_ENABLED internal PGA enabled, gain programmed in PGA_GAIN 2 FOLLOWER internal follower 3 PGA_GAIN Operational amplifier Programmable amplifier gain value 4 2 PGA_GAIN Gain2 Gain 2 0 Gain4 Gain 4 1 Gain8 Gain 8 2 Gain16 Gain 16 3 VM_SEL Inverting input selection 8 2 VM_SEL GPIO GPIO connectet to VINM 0 LOW_LEAKAGE Low leakage inputs connected (only available in certein BGA cases 1 PGA_MODE OPAMP in PGA mode 2 VP_SEL Non inverted input selection 10 1 VP_SEL GPIO GPIO connected to VINP 0 DAC DAC connected to VPINP 1 CALON Calibration mode enabled 12 1 CALON Disabled Normal mode 0 Enabled Calibration mode 1 CALSEL Calibration selection 13 1 CALSEL NMOS 0.2V applied to OPAMP inputs during calibration 0 PMOS VDDA-0.2V applied to OPAMP inputs during calibration" 1 USERTRIM allows to switch from AOP offset trimmed values to AOP offset 14 1 USERTRIM Factory Factory trim used 0 User User trim used 1 CALOUT Operational amplifier calibration output 15 1 0 1 OPA_RANGE Operational amplifier power supply range for stability 31 1 OPA_RANGE LOW low range (VDDA < 2.4V 0 HIGH low range (VDDA >2.4V 1 OPAMP1_OTR OPAMP1_OTR OPAMP1 offset trimming register in normal mode 0x4 0x20 read-write 0x00000000 TRIMOFFSETN Trim for NMOS differential pairs 0 5 0 31 TRIMOFFSETP Trim for PMOS differential pairs 8 5 0 31 OPAMP1_LPOTR OPAMP1_LPOTR OPAMP1 offset trimming register in low-power mode 0x8 0x20 read-write 0x00000000 TRIMLPOFFSETN Trim for NMOS differential pairs 0 5 0 31 TRIMLPOFFSETP Trim for PMOS differential pairs 8 5 0 31 OPAMP2_CSR OPAMP2_CSR OPAMP2 control/status register 0x10 0x20 read-write 0x00000000 OPAEN Operational amplifier Enable 0 1 OPALPM Operational amplifier Low Power Mode 1 1 OPAMODE Operational amplifier PGA mode 2 2 PGA_GAIN Operational amplifier Programmable amplifier gain value 4 2 PGA_GAIN Gain2 Gain 2 0 Gain4 Gain 4 1 Gain8 Gain 8 2 Gain16 Gain 16 3 VM_SEL Inverting input selection 8 2 VP_SEL Non inverted input selection 10 1 CALON Calibration mode enabled 12 1 CALSEL Calibration selection 13 1 USERTRIM allows to switch from AOP offset trimmed values to AOP offset 14 1 CALOUT Operational amplifier calibration output 15 1 OPAMP2_OTR OPAMP2_OTR OPAMP2 offset trimming register in normal mode 0x14 0x20 read-write 0x00000000 TRIMOFFSETN Trim for NMOS differential pairs 0 5 0 31 TRIMOFFSETP Trim for PMOS differential pairs 8 5 0 31 OPAMP2_LPOTR OPAMP2_LPOTR OPAMP2 offset trimming register in low-power mode 0x18 0x20 read-write 0x00000000 TRIMLPOFFSETN Trim for NMOS differential pairs 0 5 0 31 TRIMLPOFFSETP Trim for PMOS differential pairs 8 5 0 31 PWR Power control PWR 0x40007000 0x0 0x400 registers CR1 CR1 Power control register 1 0x0 0x20 read-write 0x00000200 LPR Low-power run 14 1 VOS Voltage scaling range selection 9 2 DBP Disable backup domain write protection 8 1 LPMS Low-power mode selection 0 3 CR2 CR2 Power control register 2 0x4 0x20 read-write 0x00000000 USV VDDUSB USB supply valid 10 1 PVME4 Peripheral voltage monitoring 4 enable: VDDA vs. 2.2V 7 1 PVME3 Peripheral voltage monitoring 3 enable: VDDA vs. 1.62V 6 1 PVME1 Peripheral voltage monitoring 1 enable: VDDUSB vs. 1.2V 4 1 PLS Power voltage detector level selection 1 3 PVDE Power voltage detector enable 0 1 CR3 CR3 Power control register 3 0x8 0x20 read-write 0x00008000 EIWUL Enable internal wakeup line 15 1 ENULP Enable ULP sampling of BOR and PVD 11 1 APC Apply pull-up and pull-down configuration 10 1 RRS SRAM2 retention in Standby mode 8 1 EWUP5 Enable Wakeup pin WKUP5 4 1 EWUP4 Enable Wakeup pin WKUP4 3 1 EWUP3 Enable Wakeup pin WKUP3 2 1 EWUP2 Enable Wakeup pin WKUP2 1 1 EWUP1 Enable Wakeup pin WKUP1 0 1 CR4 CR4 Power control register 4 0xC 0x20 read-write 0x00000000 EXT_SMPS_ON External SMPS On 13 1 VBRS VBAT battery charging resistor selection 9 1 VBE VBAT battery charging enable 8 1 WP5 Wakeup pin WKUP5 polarity 4 1 WP4 Wakeup pin WKUP4 polarity 3 1 WP3 Wakeup pin WKUP3 polarity 2 1 WP2 Wakeup pin WKUP2 polarity 1 1 WP1 Wakeup pin WKUP1 polarity 0 1 SR1 SR1 Power status register 1 0x10 0x20 read-only 0x00000000 WUFI Wakeup flag internal 15 1 EXT_SMPS_RDY External SMPS Ready 13 1 SBF Standby flag 8 1 WUF5 Wakeup flag 5 4 1 WUF4 Wakeup flag 4 3 1 WUF3 Wakeup flag 3 2 1 WUF2 Wakeup flag 2 1 1 WUF1 Wakeup flag 1 0 1 SR2 SR2 Power status register 2 0x14 0x20 read-only 0x00000000 PVMO4 Peripheral voltage monitoring output: VDDA vs. 2.2 V 15 1 PVMO3 Peripheral voltage monitoring output: VDDA vs. 1.62 V 14 1 PVMO1 Peripheral voltage monitoring output: VDDUSB vs. 1.2 V 12 1 PVDO Power voltage detector output 11 1 VOSF Voltage scaling flag 10 1 REGLPF Low-power regulator flag 9 1 REGLPS Low-power regulator started 8 1 SCR SCR Power status clear register 0x18 0x20 write-only 0x00000000 CSBF Clear standby flag 8 1 CWUF5 Clear wakeup flag 5 4 1 CWUF4 Clear wakeup flag 4 3 1 CWUF3 Clear wakeup flag 3 2 1 CWUF2 Clear wakeup flag 2 1 1 CWUF1 Clear wakeup flag 1 0 1 PUCRA PUCRA Power Port A pull-up control register 0x20 0x20 read-write 0x00000000 PU15 Port A pull-up bit y (y=0..15) 15 1 PU13 Port A pull-up bit y (y=0..15) 13 1 PU12 Port A pull-up bit y (y=0..15) 12 1 PU11 Port A pull-up bit y (y=0..15) 11 1 PU10 Port A pull-up bit y (y=0..15) 10 1 PU9 Port A pull-up bit y (y=0..15) 9 1 PU8 Port A pull-up bit y (y=0..15) 8 1 PU7 Port A pull-up bit y (y=0..15) 7 1 PU6 Port A pull-up bit y (y=0..15) 6 1 PU5 Port A pull-up bit y (y=0..15) 5 1 PU4 Port A pull-up bit y (y=0..15) 4 1 PU3 Port A pull-up bit y (y=0..15) 3 1 PU2 Port A pull-up bit y (y=0..15) 2 1 PU1 Port A pull-up bit y (y=0..15) 1 1 PU0 Port A pull-up bit y (y=0..15) 0 1 PDCRA PDCRA Power Port A pull-down control register 0x24 0x20 read-write 0x00000000 PD12 Port A pull-down bit y (y=0..15) 12 1 PD11 Port A pull-down bit y (y=0..15) 11 1 PD10 Port A pull-down bit y (y=0..15) 10 1 PD9 Port A pull-down bit y (y=0..15) 9 1 PD8 Port A pull-down bit y (y=0..15) 8 1 PD7 Port A pull-down bit y (y=0..15) 7 1 PD6 Port A pull-down bit y (y=0..15) 6 1 PD5 Port A pull-down bit y (y=0..15) 5 1 PD4 Port A pull-down bit y (y=0..15) 4 1 PD3 Port A pull-down bit y (y=0..15) 3 1 PD2 Port A pull-down bit y (y=0..15) 2 1 PD1 Port A pull-down bit y (y=0..15) 1 1 PD0 Port A pull-down bit y (y=0..15) 0 1 PUCRB PUCRB Power Port B pull-up control register 0x28 0x20 read-write 0x00000000 PU15 Port B pull-up bit y (y=0..15) 15 1 PU14 Port B pull-up bit y (y=0..15) 14 1 PU13 Port B pull-up bit y (y=0..15) 13 1 PU12 Port B pull-up bit y (y=0..15) 12 1 PU11 Port B pull-up bit y (y=0..15) 11 1 PU10 Port B pull-up bit y (y=0..15) 10 1 PU9 Port B pull-up bit y (y=0..15) 9 1 PU8 Port B pull-up bit y (y=0..15) 8 1 PU7 Port B pull-up bit y (y=0..15) 7 1 PU6 Port B pull-up bit y (y=0..15) 6 1 PU5 Port B pull-up bit y (y=0..15) 5 1 PU4 Port B pull-up bit y (y=0..15) 4 1 PU3 Port B pull-up bit y (y=0..15) 3 1 PU2 Port B pull-up bit y (y=0..15) 2 1 PU1 Port B pull-up bit y (y=0..15) 1 1 PU0 Port B pull-up bit y (y=0..15) 0 1 PDCRB PDCRB Power Port B pull-down control register 0x2C 0x20 read-write 0x00000000 PD15 Port B pull-down bit y (y=0..15) 15 1 PD14 Port B pull-down bit y (y=0..15) 14 1 PD13 Port B pull-down bit y (y=0..15) 13 1 PD12 Port B pull-down bit y (y=0..15) 12 1 PD11 Port B pull-down bit y (y=0..15) 11 1 PD10 Port B pull-down bit y (y=0..15) 10 1 PD9 Port B pull-down bit y (y=0..15) 9 1 PD8 Port B pull-down bit y (y=0..15) 8 1 PD7 Port B pull-down bit y (y=0..15) 7 1 PD6 Port B pull-down bit y (y=0..15) 6 1 PD5 Port B pull-down bit y (y=0..15) 5 1 PD3 Port B pull-down bit y (y=0..15) 3 1 PD2 Port B pull-down bit y (y=0..15) 2 1 PD1 Port B pull-down bit y (y=0..15) 1 1 PD0 Port B pull-down bit y (y=0..15) 0 1 PUCRC PUCRC Power Port C pull-up control register 0x30 0x20 read-write 0x00000000 PU15 Port C pull-up bit y (y=0..15) 15 1 PU14 Port C pull-up bit y (y=0..15) 14 1 PU13 Port C pull-up bit y (y=0..15) 13 1 PU12 Port C pull-up bit y (y=0..15) 12 1 PU11 Port C pull-up bit y (y=0..15) 11 1 PU10 Port C pull-up bit y (y=0..15) 10 1 PU9 Port C pull-up bit y (y=0..15) 9 1 PU8 Port C pull-up bit y (y=0..15) 8 1 PU7 Port C pull-up bit y (y=0..15) 7 1 PU6 Port C pull-up bit y (y=0..15) 6 1 PU5 Port C pull-up bit y (y=0..15) 5 1 PU4 Port C pull-up bit y (y=0..15) 4 1 PU3 Port C pull-up bit y (y=0..15) 3 1 PU2 Port C pull-up bit y (y=0..15) 2 1 PU1 Port C pull-up bit y (y=0..15) 1 1 PU0 Port C pull-up bit y (y=0..15) 0 1 PDCRC PDCRC Power Port C pull-down control register 0x34 0x20 read-write 0x00000000 PD15 Port C pull-down bit y (y=0..15) 15 1 PD14 Port C pull-down bit y (y=0..15) 14 1 PD13 Port C pull-down bit y (y=0..15) 13 1 PD12 Port C pull-down bit y (y=0..15) 12 1 PD11 Port C pull-down bit y (y=0..15) 11 1 PD10 Port C pull-down bit y (y=0..15) 10 1 PD9 Port C pull-down bit y (y=0..15) 9 1 PD8 Port C pull-down bit y (y=0..15) 8 1 PD7 Port C pull-down bit y (y=0..15) 7 1 PD6 Port C pull-down bit y (y=0..15) 6 1 PD5 Port C pull-down bit y (y=0..15) 5 1 PD4 Port C pull-down bit y (y=0..15) 4 1 PD3 Port C pull-down bit y (y=0..15) 3 1 PD2 Port C pull-down bit y (y=0..15) 2 1 PD1 Port C pull-down bit y (y=0..15) 1 1 PD0 Port C pull-down bit y (y=0..15) 0 1 PUCRD PUCRD Power Port D pull-up control register 0x38 0x20 read-write 0x00000000 PU15 Port D pull-up bit y (y=0..15) 15 1 PU14 Port D pull-up bit y (y=0..15) 14 1 PU13 Port D pull-up bit y (y=0..15) 13 1 PU12 Port D pull-up bit y (y=0..15) 12 1 PU11 Port D pull-up bit y (y=0..15) 11 1 PU10 Port D pull-up bit y (y=0..15) 10 1 PU9 Port D pull-up bit y (y=0..15) 9 1 PU8 Port D pull-up bit y (y=0..15) 8 1 PU7 Port D pull-up bit y (y=0..15) 7 1 PU6 Port D pull-up bit y (y=0..15) 6 1 PU5 Port D pull-up bit y (y=0..15) 5 1 PU4 Port D pull-up bit y (y=0..15) 4 1 PU3 Port D pull-up bit y (y=0..15) 3 1 PU2 Port D pull-up bit y (y=0..15) 2 1 PU1 Port D pull-up bit y (y=0..15) 1 1 PU0 Port D pull-up bit y (y=0..15) 0 1 PDCRD PDCRD Power Port D pull-down control register 0x3C 0x20 read-write 0x00000000 PD15 Port D pull-down bit y (y=0..15) 15 1 PD14 Port D pull-down bit y (y=0..15) 14 1 PD13 Port D pull-down bit y (y=0..15) 13 1 PD12 Port D pull-down bit y (y=0..15) 12 1 PD11 Port D pull-down bit y (y=0..15) 11 1 PD10 Port D pull-down bit y (y=0..15) 10 1 PD9 Port D pull-down bit y (y=0..15) 9 1 PD8 Port D pull-down bit y (y=0..15) 8 1 PD7 Port D pull-down bit y (y=0..15) 7 1 PD6 Port D pull-down bit y (y=0..15) 6 1 PD5 Port D pull-down bit y (y=0..15) 5 1 PD4 Port D pull-down bit y (y=0..15) 4 1 PD3 Port D pull-down bit y (y=0..15) 3 1 PD2 Port D pull-down bit y (y=0..15) 2 1 PD1 Port D pull-down bit y (y=0..15) 1 1 PD0 Port D pull-down bit y (y=0..15) 0 1 PUCRE PUCRE Power Port E pull-up control register 0x40 0x20 read-write 0x00000000 PU15 Port E pull-up bit y (y=0..15) 15 1 PU14 Port E pull-up bit y (y=0..15) 14 1 PU13 Port E pull-up bit y (y=0..15) 13 1 PU12 Port E pull-up bit y (y=0..15) 12 1 PU11 Port E pull-up bit y (y=0..15) 11 1 PU10 Port E pull-up bit y (y=0..15) 10 1 PU9 Port E pull-up bit y (y=0..15) 9 1 PU8 Port E pull-up bit y (y=0..15) 8 1 PU7 Port E pull-up bit y (y=0..15) 7 1 PU6 Port E pull-up bit y (y=0..15) 6 1 PU5 Port E pull-up bit y (y=0..15) 5 1 PU4 Port E pull-up bit y (y=0..15) 4 1 PU3 Port E pull-up bit y (y=0..15) 3 1 PU2 Port E pull-up bit y (y=0..15) 2 1 PU1 Port E pull-up bit y (y=0..15) 1 1 PU0 Port E pull-up bit y (y=0..15) 0 1 PDCRE PDCRE Power Port E pull-down control register 0x44 0x20 read-write 0x00000000 PD15 Port E pull-down bit y (y=0..15) 15 1 PD14 Port E pull-down bit y (y=0..15) 14 1 PD13 Port E pull-down bit y (y=0..15) 13 1 PD12 Port E pull-down bit y (y=0..15) 12 1 PD11 Port E pull-down bit y (y=0..15) 11 1 PD10 Port E pull-down bit y (y=0..15) 10 1 PD9 Port E pull-down bit y (y=0..15) 9 1 PD8 Port E pull-down bit y (y=0..15) 8 1 PD7 Port E pull-down bit y (y=0..15) 7 1 PD6 Port E pull-down bit y (y=0..15) 6 1 PD5 Port E pull-down bit y (y=0..15) 5 1 PD4 Port E pull-down bit y (y=0..15) 4 1 PD3 Port E pull-down bit y (y=0..15) 3 1 PD2 Port E pull-down bit y (y=0..15) 2 1 PD1 Port E pull-down bit y (y=0..15) 1 1 PD0 Port E pull-down bit y (y=0..15) 0 1 PUCRH PUCRH Power Port H pull-up control register 0x58 0x20 read-write 0x00000000 PU3 Port H pull-up bit y (y=0..1) 3 1 PU1 Port H pull-up bit y (y=0..1) 1 1 PU0 Port H pull-up bit y (y=0..1) 0 1 PDCRH PDCRH Power Port H pull-down control register 0x5C 0x20 read-write 0x00000000 PD3 Port H pull-down bit y (y=0..1) 3 1 PD1 Port H pull-down bit y (y=0..1) 1 1 PD0 Port H pull-down bit y (y=0..1) 0 1 RNG Random number generator RNG 0x50060800 0x0 0x400 registers RNG RNG global interrupt 80 CR CR control register 0x0 0x20 read-write 0x00000000 IE Interrupt enable 3 1 IE Disabled RNG interrupt is disabled 0 Enabled RNG interrupt is enabled 1 RNGEN Random number generator enable 2 1 RNGEN Disabled Random number generator is disabled 0 Enabled Random number generator is enabled 1 SR SR status register 0x4 0x20 0x00000000 CEIS Clock error interrupt status 5 1 read-write zeroToClear CEISW write Clear Clear flag 0 CEISR read Correct The RNG clock is correct 0 Slow The RNG has been detected too slow An interrupt is pending if IE = 1 in the RNG_CR register 1 SEIS Seed error interrupt status 6 1 read-write zeroToClear write SEISR read NoFault No faulty sequence detected 0 Fault At least one faulty sequence has been detected. See **SECS** bit description for details. An interrupt is pending if IE = 1 in the RNG_CR register. 1 SECS Seed error current status 2 1 read-only SECS NoFault No faulty sequence has currently been detected. If the SEIS bit is set, this means that a faulty sequence was detected and the situation has been recovered. 0 Fault At least one faulty sequence has been detected - see ref manual for details 1 CECS Clock error current status 1 1 read-only CECS Correct The RNG clock is correct. If the CEIS bit is set, this means that a slow clock was detected and the situation has been recovered. 0 Slow The RNG clock is too slow 1 DRDY Data ready 0 1 read-only DRDY Invalid The RNG_DR register is not yet valid, no random data is available 0 Valid The RNG_DR register contains valid random data. Once the RNG_DR register has been read, this bit returns to 0 until a new random value is generated. 1 DR DR data register 0x8 0x20 read-only 0x00000000 RNDATA Random data 0 32 0 4294967295 RTC Real-time clock RTC 0x40002800 0x0 0x400 registers RTC_TAMP_STAMP RTC Tamper or TimeStamp /CSS on LSE through EXTI line 19 interrupts 2 RTC_WKUP RTC Wakeup timer through EXTI line 20 interrupt 3 RTC_ALARM RTC alarms through EXTI line 18 interrupts 41 TR TR time register 0x0 0x20 read-write 0x00000000 PM AM/PM notation 22 1 PM AM AM or 24-hour format 0 PM PM 1 HT Hour tens in BCD format 20 2 0 3 HU Hour units in BCD format 16 4 0 15 MNT Minute tens in BCD format 12 3 0 7 MNU Minute units in BCD format 8 4 0 15 ST Second tens in BCD format 4 3 0 7 SU Second units in BCD format 0 4 0 15 DR DR date register 0x4 0x20 read-write 0x00002101 YT Year tens in BCD format 20 4 0 15 YU Year units in BCD format 16 4 0 15 WDU Week day units 13 3 1 7 MT Month tens in BCD format 12 1 0 1 MU Month units in BCD format 8 4 0 15 DT Date tens in BCD format 4 2 0 3 DU Date units in BCD format 0 4 0 15 SSR SSR RTC sub second register 0x8 0x20 read-only 0x00000000 SS Sub second value 0 16 0 65535 ICSR ICSR RTC initialization control and status register 0xC 0x20 0x00000007 2 0x1 A,B ALR%sWF Alarm %s write flag 0 1 read-only WUTWF Wakeup timer write flag 2 1 read-only WUTWFR UpdateNotAllowed Wakeup timer configuration update not allowed 0 UpdateAllowed Wakeup timer configuration update allowed 1 SHPF Shift operation pending 3 1 read-write SHPFR read NoShiftPending No shift operation is pending 0 ShiftPending A shift operation is pending 1 INITS Initialization status flag 4 1 read-only INITSR NotInitalized Calendar has not been initialized 0 Initalized Calendar has been initialized 1 RSF Registers synchronization flag 5 1 read-write zeroToClear RSFR read NotSynced Calendar shadow registers not yet synchronized 0 Synced Calendar shadow registers synchronized 1 RSFW write Clear This flag is cleared by software by writing 0 0 INITF Initialization flag 6 1 read-only INITFR NotAllowed Calendar registers update is not allowed 0 Allowed Calendar registers update is allowed 1 INIT Initialization mode 7 1 read-write INIT FreeRunningMode Free running mode 0 InitMode Initialization mode used to program time and date register (RTC_TR and RTC_DR), and prescaler register (RTC_PRER). Counters are stopped and start counting from the new value when INIT is reset. 1 RECALPF Recalibration pending Flag 16 1 read-only RECALPFR Pending The RECALPF status flag is automatically set to 1 when software writes to the RTC_CALR register, indicating that the RTC_CALR register is blocked. When the new calibration settings are taken into account, this bit returns to 0 1 PRER PRER prescaler register 0x10 0x20 read-write 0x007F00FF PREDIV_A Asynchronous prescaler factor 16 7 0 127 PREDIV_S Synchronous prescaler factor 0 15 0 32767 WUTR WUTR wakeup timer register 0x14 0x20 read-write 0x0000FFFF WUT Wakeup auto-reload value bits 0 16 0 65535 WUTOCLR Wakeup auto-reload output clear value 16 16 2 0x8 A,B ALRM%sR ALRM%sR Alarm %s register 0x40 0x20 read-write 0x00000000 MSK1 Alarm seconds mask 7 1 MSK1 Mask Alarm set if the date/day match 0 NotMask Date/day don’t care in Alarm comparison 1 MSK4 Alarm date mask 31 1 WDSEL Week day selection 30 1 WDSEL DateUnits DU[3:0] represents the date units 0 WeekDay DU[3:0] represents the week day. DT[1:0] is don’t care. 1 DT Date tens in BCD format 28 2 0 3 DU Date units or day in BCD format 24 4 0 15 MSK3 Alarm hours mask 23 1 PM AM/PM notation 22 1 PM AM AM or 24-hour format 0 PM PM 1 HT Hour tens in BCD format 20 2 0 3 HU Hour units in BCD format 16 4 0 15 MSK2 Alarm minutes mask 15 1 MNT Minute tens in BCD format 12 3 0 7 MNU Minute units in BCD format 8 4 0 15 ST Second tens in BCD format 4 3 0 7 SU Second units in BCD format 0 4 0 15 WPR WPR write protection register 0x24 0x20 write-only 0x00000000 KEY Write protection key 0 8 KEY Activate Activate write protection (any value that is not the keys) 0 Deactivate2 Key 2 83 Deactivate1 Key 1 202 SHIFTR SHIFTR shift control register 0x2C 0x20 write-only 0x00000000 ADD1S Add one second 31 1 ADD1SW Add1 Add one second to the clock/calendar 1 SUBFS Subtract a fraction of a second 0 15 0 32767 TSTR TSTR time stamp time register 0x30 TSDR TSDR time stamp date register 0x34 TSSSR TSSSR timestamp sub second register 0x38 CALR CALR RTC calibration register 0x28 0x20 read-write 0x00000000 CALP Increase frequency of RTC by 488.5 ppm 15 1 CALP NoChange No RTCCLK pulses are added 0 IncreaseFreq One RTCCLK pulse is effectively inserted every 2^11 pulses (frequency increased by 488.5 ppm) 1 CALW8 Use an 8-second calibration cycle period 14 1 CALW8 EightSeconds When CALW8 is set to ‘1’, the 8-second calibration cycle period is selected 1 CALW16 Use a 16-second calibration cycle period 13 1 CALW16 SixteenSeconds When CALW16 is set to ‘1’, the 16-second calibration cycle period is selected.This bit must not be set to ‘1’ if CALW8=1 1 CALM Calibration minus 0 9 0 511 LPCAL Calibration low-power mode 21 1 2 0x8 A,B ALRM%sSSR ALRM%sSSR Alarm %s sub-second register 0x44 0x20 read-write 0x00000000 MASKSS Mask the most-significant bits starting at this bit 24 4 SS Sub seconds value 0 15 0 32767 SR SR RTC status register 0x50 0x20 read-only 0x00000000 ITSF Internal timestamp flag 5 1 ITSF TimestampEvent This flag is set by hardware when a timestamp on the internal event occurs 1 TSOVF Timestamp overflow flag 4 1 TSOVF Overflow This flag is set by hardware when a time-stamp event occurs while TSF is already set 1 TSF Timestamp flag 3 1 TSF TimestampEvent This flag is set by hardware when a time-stamp event occurs 1 WUTF Wakeup timer flag 2 1 WUTF Zero This flag is set by hardware when the wakeup auto-reload counter reaches 0 1 2 0x1 A,B ALR%sF Alarm %s flag 0 1 ALRAF Match This flag is set by hardware when the time/date registers (RTC_TR and RTC_DR) match the Alarm register (RTC_ALRxBR) 1 MISR MISR RTC masked interrupt status register 0x54 0x20 read-only 0x00000000 ITSMF Internal timestamp masked flag 5 1 ITSMF TimestampEvent This flag is set by hardware when a timestamp on the internal event occurs 1 TSOVMF Timestamp overflow masked flag 4 1 TSOVMF Overflow This flag is set by hardware when a time-stamp event occurs while TSF is already set 1 TSMF Timestamp masked flag 3 1 TSMF TimestampEvent This flag is set by hardware when a time-stamp event occurs 1 WUTMF Wakeup timer masked flag 2 1 WUTMF Zero This flag is set by hardware when the wakeup auto-reload counter reaches 0 1 2 0x1 A,B ALR%sMF Alarm %s masked flag 0 1 ALRAMF Match This flag is set by hardware when the time/date registers (RTC_TR and RTC_DR) match the Alarm register (RTC_ALRMxR) 1 SCR SCR RTC status clear register 0x5C 0x20 write-only 0x00000000 CALRAF Clear alarm A flag 0 1 CALRAF Clear Clear interrupt flag 1 CITSF Clear internal timestamp flag 5 1 CTSOVF Clear timestamp overflow flag 4 1 CTSF Clear timestamp flag 3 1 CWUTF Clear wakeup timer flag 2 1 CALRBF Clear alarm B flag 1 1 CR CR RTC control register 0x18 0x20 0x00000000 OUT2EN RTC_OUT2 output enable 31 1 read-write OUT2EN Disabled RTC output 2 disable 0 Enabled RTC output 2 enable 1 TAMPALRM_TYPE TAMPALRM output type 30 1 read-write TAMPALRM_TYPE PushPull TAMPALRM is push-pull output 0 OpenDrain TAMPALRM is open-drain output 1 TAMPALRM_PU TAMPALRM pull-up enable 29 1 read-write TAMPALRM_PU NoPullUp No pull-up is applied on TAMPALRM output 0 PullUp A pull-up is applied on TAMPALRM output 1 TAMPOE Tamper detection output enable on TAMPALRM 26 1 read-write TAMPOE Disabled The tamper flag is not routed on TAMPALRM 0 Enabled The tamper flag is routed on TAMPALRM, combined with the signal provided by OSEL and with the polarity provided by POL 1 TAMPTS Activate timestamp on tamper detection event 25 1 read-write TAMPTS Disabled Tamper detection event does not cause a RTC timestamp to be saved 0 Enabled Save RTC timestamp on tamper detection event 1 ITSE timestamp on internal event enable 24 1 read-write ITSE Disabled Internal event timestamp disabled 0 Enabled Internal event timestamp enabled 1 COE Calibration output enable 23 1 read-write COE Disabled Calibration output disabled 0 Enabled Calibration output enabled 1 OSEL Output selection 21 2 read-write OSEL Disabled Output disabled 0 AlarmA Alarm A output enabled 1 AlarmB Alarm B output enabled 2 Wakeup Wakeup output enabled 3 POL Output polarity 20 1 read-write POL High The pin is high when ALRAF/ALRBF/WUTF is asserted (depending on OSEL[1:0]) 0 Low The pin is low when ALRAF/ALRBF/WUTF is asserted (depending on OSEL[1:0]) 1 COSEL Calibration output selection 19 1 read-write COSEL CalFreq_512Hz Calibration output is 512 Hz (with default prescaler setting) 0 CalFreq_1Hz Calibration output is 1 Hz (with default prescaler setting) 1 BKP Backup 18 1 read-write BKP DSTNotChanged Daylight Saving Time change has not been performed 0 DSTChanged Daylight Saving Time change has been performed 1 SUB1H Subtract 1 hour (winter time change) 17 1 write-only SUB1HW Sub1 Subtracts 1 hour to the current time. This can be used for winter time change outside initialization mode 1 ADD1H Add 1 hour (summer time change) 16 1 write-only ADD1HW Add1 Adds 1 hour to the current time. This can be used for summer time change outside initialization mode 1 TSIE Timestamp interrupt enable 15 1 read-write TSIE Disabled Time-stamp Interrupt disabled 0 Enabled Time-stamp Interrupt enabled 1 WUTIE Wakeup timer interrupt enable 14 1 read-write WUTIE Disabled Wakeup timer interrupt disabled 0 Enabled Wakeup timer interrupt enabled 1 2 0x1 A,B ALR%sIE Alarm %s interrupt enable 12 1 read-write ALRAIE Disabled Alarm Interrupt disabled 0 Enabled Alarm Interrupt enabled 1 TSE timestamp enable 11 1 read-write TSE Disabled Timestamp disabled 0 Enabled Timestamp enabled 1 WUTE Wakeup timer enable 10 1 read-write WUTE Disabled Wakeup timer disabled 0 Enabled Wakeup timer enabled 1 2 0x1 A,B ALR%sE Alarm %s enable 8 1 read-write ALRAE Disabled Alarm disabled 0 Enabled Alarm enabled 1 FMT Hour format 6 1 read-write FMT TwentyFourHour 24 hour/day format 0 AmPm AM/PM hour format 1 BYPSHAD Bypass the shadow registers 5 1 read-write BYPSHAD ShadowReg Calendar values (when reading from RTC_SSR, RTC_TR, and RTC_DR) are taken from the shadow registers, which are updated once every two RTCCLK cycles 0 BypassShadowReg Calendar values (when reading from RTC_SSR, RTC_TR, and RTC_DR) are taken directly from the calendar counters 1 REFCKON RTC_REFIN reference clock detection enable (50 or 60 Hz) 4 1 read-write REFCKON Disabled RTC_REFIN detection disabled 0 Enabled RTC_REFIN detection enabled 1 TSEDGE Timestamp event active edge 3 1 read-write TSEDGE RisingEdge RTC_TS input rising edge generates a time-stamp event 0 FallingEdge RTC_TS input falling edge generates a time-stamp event 1 WUCKSEL ck_wut wakeup clock selection 0 3 read-write WUCKSEL Div16 RTC/16 clock is selected 0 Div8 RTC/8 clock is selected 1 Div4 RTC/4 clock is selected 2 Div2 RTC/2 clock is selected 3 ClockSpare ck_spre (usually 1 Hz) clock is selected 4 ClockSpareWithOffset ck_spre (usually 1 Hz) clock is selected and 2^16 is added to the WUT counter value 6 SPI1 Serial peripheral interface/Inter-IC sound SPI 0x40013000 0x0 0x400 registers SPI1 SPI1 global interrupt 35 CR1 CR1 control register 1 0x0 0x10 read-write 0x00000000 BIDIMODE Bidirectional data mode enable 15 1 BIDIMODE Unidirectional 2-line unidirectional data mode selected 0 Bidirectional 1-line bidirectional data mode selected 1 BIDIOE Output enable in bidirectional mode 14 1 BIDIOE OutputDisabled Output disabled (receive-only mode) 0 OutputEnabled Output enabled (transmit-only mode) 1 CRCEN Hardware CRC calculation enable 13 1 CRCEN Disabled CRC calculation disabled 0 Enabled CRC calculation enabled 1 CRCNEXT CRC transfer next 12 1 CRCNEXT TxBuffer Next transmit value is from Tx buffer 0 CRC Next transmit value is from Tx CRC register 1 CRCL CRC length 11 1 CRCL EightBit 8-bit CRC length 0 SixteenBit 16-bit CRC length 1 RXONLY Receive only 10 1 RXONLY FullDuplex Full duplex (Transmit and receive) 0 OutputDisabled Output disabled (Receive-only mode) 1 SSM Software slave management 9 1 SSM Disabled Software slave management disabled 0 Enabled Software slave management enabled 1 SSI Internal slave select 8 1 SSI SlaveSelected 0 is forced onto the NSS pin and the I/O value of the NSS pin is ignored 0 SlaveNotSelected 1 is forced onto the NSS pin and the I/O value of the NSS pin is ignored 1 LSBFIRST Frame format 7 1 LSBFIRST MSBFirst Data is transmitted/received with the MSB first 0 LSBFirst Data is transmitted/received with the LSB first 1 SPE SPI enable 6 1 SPE Disabled Peripheral disabled 0 Enabled Peripheral enabled 1 BR Baud rate control 3 3 BR Div2 f_PCLK / 2 0 Div4 f_PCLK / 4 1 Div8 f_PCLK / 8 2 Div16 f_PCLK / 16 3 Div32 f_PCLK / 32 4 Div64 f_PCLK / 64 5 Div128 f_PCLK / 128 6 Div256 f_PCLK / 256 7 MSTR Master selection 2 1 MSTR Slave Slave configuration 0 Master Master configuration 1 CPOL Clock polarity 1 1 CPOL IdleLow CK to 0 when idle 0 IdleHigh CK to 1 when idle 1 CPHA Clock phase 0 1 CPHA FirstEdge The first clock transition is the first data capture edge 0 SecondEdge The second clock transition is the first data capture edge 1 CR2 CR2 control register 2 0x4 0x10 read-write 0x00000700 RXDMAEN Rx buffer DMA enable 0 1 RXDMAEN Disabled Rx buffer DMA disabled 0 Enabled Rx buffer DMA enabled 1 TXDMAEN Tx buffer DMA enable 1 1 TXDMAEN Disabled Tx buffer DMA disabled 0 Enabled Tx buffer DMA enabled 1 SSOE SS output enable 2 1 SSOE Disabled SS output is disabled in master mode 0 Enabled SS output is enabled in master mode 1 NSSP NSS pulse management 3 1 NSSP NoPulse No NSS pulse 0 PulseGenerated NSS pulse generated 1 FRF Frame format 4 1 FRF Motorola SPI Motorola mode 0 TI SPI TI mode 1 ERRIE Error interrupt enable 5 1 ERRIE Masked Error interrupt masked 0 NotMasked Error interrupt not masked 1 RXNEIE RX buffer not empty interrupt enable 6 1 RXNEIE Masked RXE interrupt masked 0 NotMasked RXE interrupt not masked 1 TXEIE Tx buffer empty interrupt enable 7 1 TXEIE Masked TXE interrupt masked 0 NotMasked TXE interrupt not masked 1 DS Data size 8 4 DS FourBit 4-bit 3 FiveBit 5-bit 4 SixBit 6-bit 5 SevenBit 7-bit 6 EightBit 8-bit 7 NineBit 9-bit 8 TenBit 10-bit 9 ElevenBit 11-bit 10 TwelveBit 12-bit 11 ThirteenBit 13-bit 12 FourteenBit 14-bit 13 FifteenBit 15-bit 14 SixteenBit 16-bit 15 FRXTH FIFO reception threshold 12 1 FRXTH Half RXNE event is generated if the FIFO level is greater than or equal to 1/2 (16-bit) 0 Quarter RXNE event is generated if the FIFO level is greater than or equal to 1/4 (8-bit) 1 LDMA_RX Last DMA transfer for reception 13 1 LDMA_RX Even Number of data to transfer for receive is even 0 Odd Number of data to transfer for receive is odd 1 LDMA_TX Last DMA transfer for transmission 14 1 LDMA_TX Even Number of data to transfer for transmit is even 0 Odd Number of data to transfer for transmit is odd 1 SR SR status register 0x8 0x10 0x00000002 RXNE Receive buffer not empty 0 1 read-only RXNE Empty Rx buffer empty 0 NotEmpty Rx buffer not empty 1 TXE Transmit buffer empty 1 1 read-only TXE NotEmpty Tx buffer not empty 0 Empty Tx buffer empty 1 CRCERR CRC error flag 4 1 read-write zeroToClear CRCERRR read Match CRC value received matches the SPIx_RXCRCR value 0 NoMatch CRC value received does not match the SPIx_RXCRCR value 1 CRCERRW write Clear Clear flag 0 MODF Mode fault 5 1 read-only MODFR NoFault No mode fault occurred 0 Fault Mode fault occurred 1 OVR Overrun flag 6 1 read-only OVRR NoOverrun No overrun occurred 0 Overrun Overrun occurred 1 BSY Busy flag 7 1 read-only BSYR NotBusy SPI not busy 0 Busy SPI busy 1 FRE Frame format error 8 1 read-only FRER NoError No frame format error 0 Error A frame format error occurred 1 FRLVL FIFO reception level 9 2 read-only FRLVLR Empty Rx FIFO Empty 0 Quarter Rx 1/4 FIFO 1 Half Rx 1/2 FIFO 2 Full Rx FIFO full 3 FTLVL FIFO transmission level 11 2 read-only FTLVLR Empty Tx FIFO Empty 0 Quarter Tx 1/4 FIFO 1 Half Tx 1/2 FIFO 2 Full Tx FIFO full 3 DR DR data register 0xC 0x10 read-write 0x00000000 DR Data register 0 16 0 65535 DR8 Direct 8-bit access to data register DR 0xC 0x8 read-write DR Data register 0 8 0 255 CRCPR CRCPR CRC polynomial register 0x10 0x10 read-write 0x00000007 CRCPOLY CRC polynomial register 0 16 0 65535 RXCRCR RXCRCR RX CRC register 0x14 0x10 read-only 0x00000000 RxCRC Rx CRC register 0 16 0 65535 TXCRCR TXCRCR TX CRC register 0x18 0x10 read-only 0x00000000 TxCRC Tx CRC register 0 16 0 65535 SPI2 0x40003800 SPI2 SPI2 global interrupt 36 SYSCFG System configuration controller SYSCFG 0x40010000 0x0 0x30 registers MEMRMP MEMRMP memory remap register 0x0 0x20 read-write 0x00000000 MEM_MODE Memory mapping selection 0 3 CFGR1 CFGR1 configuration register 1 0x4 0x20 read-write 0x7C000001 FPU_IE Floating Point Unit interrupts enable bits 26 6 I2C3_FMP I2C3 Fast-mode Plus driving capability activation 22 1 I2C2_FMP I2C2 Fast-mode Plus driving capability activation 21 1 I2C1_FMP I2C1 Fast-mode Plus driving capability activation 20 1 I2C_PB9_FMP Fast-mode Plus (Fm+) driving capability activation on PB9 19 1 I2C_PB8_FMP Fast-mode Plus (Fm+) driving capability activation on PB8 18 1 I2C_PB7_FMP Fast-mode Plus (Fm+) driving capability activation on PB7 17 1 I2C_PB6_FMP Fast-mode Plus (Fm+) driving capability activation on PB6 16 1 BOOSTEN I/O analog switch voltage booster enable 8 1 FWDIS Firewall disable 0 1 EXTICR1 EXTICR1 external interrupt configuration register 1 0x8 0x20 read-write 0x00000000 EXTI3 EXTI 3 configuration bits 12 3 EXTI2 EXTI 2 configuration bits 8 3 EXTI1 EXTI 1 configuration bits 4 3 EXTI0 EXTI 0 configuration bits 0 3 EXTICR2 EXTICR2 external interrupt configuration register 2 0xC 0x20 read-write 0x00000000 EXTI7 EXTI 7 configuration bits 12 3 EXTI6 EXTI 6 configuration bits 8 3 EXTI5 EXTI 5 configuration bits 4 3 EXTI4 EXTI 4 configuration bits 0 3 EXTICR3 EXTICR3 external interrupt configuration register 3 0x10 0x20 read-write 0x00000000 EXTI11 EXTI 11 configuration bits 12 3 EXTI10 EXTI 10 configuration bits 8 3 EXTI9 EXTI 9 configuration bits 4 3 EXTI8 EXTI 8 configuration bits 0 3 EXTICR4 EXTICR4 external interrupt configuration register 4 0x14 0x20 read-write 0x00000000 EXTI15 EXTI15 configuration bits 12 3 EXTI14 EXTI14 configuration bits 8 3 EXTI13 EXTI13 configuration bits 4 3 EXTI12 EXTI12 configuration bits 0 3 SCSR SCSR SCSR 0x18 0x20 0x00000000 SRAM2BSY SRAM2 busy by erase operation 1 1 read-only SRAM2ER SRAM2 Erase 0 1 read-write CFGR2 CFGR2 CFGR2 0x1C 0x20 0x00000000 SPF SRAM2 parity error flag 8 1 read-write ECCL ECC Lock 3 1 write-only PVDL PVD lock enable bit 2 1 write-only SPL SRAM2 parity lock bit 1 1 write-only CLL LOCKUP (Hardfault) output enable bit 0 1 write-only SWPR SWPR SWPR 0x20 0x20 write-only 0x00000000 P31WP SRAM2 page 31 write protection 31 1 P30WP P30WP 30 1 P29WP P29WP 29 1 P28WP P28WP 28 1 P27WP P27WP 27 1 P26WP P26WP 26 1 P25WP P25WP 25 1 P24WP P24WP 24 1 P23WP P23WP 23 1 P22WP P22WP 22 1 P21WP P21WP 21 1 P20WP P20WP 20 1 P19WP P19WP 19 1 P18WP P18WP 18 1 P17WP P17WP 17 1 P16WP P16WP 16 1 P15WP P15WP 15 1 P14WP P14WP 14 1 P13WP P13WP 13 1 P12WP P12WP 12 1 P11WP P11WP 11 1 P10WP P10WP 10 1 P9WP P9WP 9 1 P8WP P8WP 8 1 P7WP P7WP 7 1 P6WP P6WP 6 1 P5WP P5WP 5 1 P4WP P4WP 4 1 P3WP P3WP 3 1 P2WP P2WP 2 1 P1WP P1WP 1 1 P0WP P0WP 0 1 SKR SKR SKR 0x24 0x20 write-only 0x00000000 KEY SRAM2 write protection key for software erase 0 8 TIM1 Advanced-timers TIM 0x40012C00 0x0 0x400 registers CR1 CR1 control register 1 0x0 0x10 read-write 0x00000000 UIFREMAP UIF status bit remapping 11 1 CKD Clock division 8 2 CKD Div1 t_DTS = t_CK_INT 0 Div2 t_DTS = 2 × t_CK_INT 1 Div4 t_DTS = 4 × t_CK_INT 2 ARPE Auto-reload preload enable 7 1 ARPE Disabled TIMx_APRR register is not buffered 0 Enabled TIMx_APRR register is buffered 1 CMS Center-aligned mode selection 5 2 CMS EdgeAligned The counter counts up or down depending on the direction bit 0 CenterAligned1 The counter counts up and down alternatively. Output compare interrupt flags are set only when the counter is counting down. 1 CenterAligned2 The counter counts up and down alternatively. Output compare interrupt flags are set only when the counter is counting up. 2 CenterAligned3 The counter counts up and down alternatively. Output compare interrupt flags are set both when the counter is counting up or down. 3 DIR Direction 4 1 DIR Up Counter used as upcounter 0 Down Counter used as downcounter 1 OPM One-pulse mode 3 1 OPM Disabled Counter is not stopped at update event 0 Enabled Counter stops counting at the next update event (clearing the CEN bit) 1 URS Update request source 2 1 URS AnyEvent Any of counter overflow/underflow, setting UG, or update through slave mode, generates an update interrupt or DMA request 0 CounterOnly Only counter overflow/underflow generates an update interrupt or DMA request 1 UDIS Update disable 1 1 UDIS Enabled Update event enabled 0 Disabled Update event disabled 1 CEN Counter enable 0 1 CEN Disabled Counter disabled 0 Enabled Counter enabled 1 CR2 CR2 control register 2 0x4 0x20 read-write 0x00000000 MMS2 Master mode selection 2 20 4 6 0x2 1-6 OIS%s Output Idle state (OC%s output) 8 1 OIS1 Reset OCx=0 (after a dead-time if OCx(N) is implemented) when MOE=0 0 Set OCx=1 (after a dead-time if OCx(N) is implemented) when MOE=0 1 3 0x2 1-3 OIS%sN Output Idle state (OC%sN output) 9 1 OIS1N Reset OCxN=0 after a dead-time when MOE=0 0 Set OCxN=1 after a dead-time when MOE=0 1 TI1S TI1 selection 7 1 TI1S Normal The TIMx_CH1 pin is connected to TI1 input 0 XOR The TIMx_CH1, CH2, CH3 pins are connected to TI1 input 1 MMS Master mode selection 4 3 MMS Reset The UG bit from the TIMx_EGR register is used as trigger output 0 Enable The counter enable signal, CNT_EN, is used as trigger output 1 Update The update event is selected as trigger output 2 ComparePulse The trigger output send a positive pulse when the CC1IF flag it to be set, as soon as a capture or a compare match occurred 3 CompareOC1 OC1REF signal is used as trigger output 4 CompareOC2 OC2REF signal is used as trigger output 5 CompareOC3 OC3REF signal is used as trigger output 6 CompareOC4 OC4REF signal is used as trigger output 7 CCDS Capture/compare DMA selection 3 1 CCDS OnCompare CCx DMA request sent when CCx event occurs 0 OnUpdate CCx DMA request sent when update event occurs 1 CCUS Capture/compare control update selection 2 1 CCUS Sw When capture/compare control bits are preloaded (CCPC=1), they are updated by setting the COMG bit only 0 SwOrEdge When capture/compare control bits are preloaded (CCPC=1), they are updated by setting the COMG bit or when an rising edge occurs on TRGI 1 CCPC Capture/compare preloaded control 0 1 CCPC NotPreloaded CCxE, CCxNE and OCxM bits are not preloaded 0 Preloaded CCxE, CCxNE and OCxM bits are preloaded 1 SMCR SMCR slave mode control register 0x8 0x20 read-write 0x00000000 SMS_3 Slave mode selection - bit 3 16 1 ETP External trigger polarity 15 1 ETP NotInverted ETR is noninverted, active at high level or rising edge 0 Inverted ETR is inverted, active at low level or falling edge 1 ECE External clock enable 14 1 ECE Disabled External clock mode 2 disabled 0 Enabled External clock mode 2 enabled. The counter is clocked by any active edge on the ETRF signal. 1 ETPS External trigger prescaler 12 2 ETPS Div1 Prescaler OFF 0 Div2 ETRP frequency divided by 2 1 Div4 ETRP frequency divided by 4 2 Div8 ETRP frequency divided by 8 3 ETF External trigger filter 8 4 ETF NoFilter No filter, sampling is done at fDTS 0 FCK_INT_N2 fSAMPLING=fCK_INT, N=2 1 FCK_INT_N4 fSAMPLING=fCK_INT, N=4 2 FCK_INT_N8 fSAMPLING=fCK_INT, N=8 3 FDTS_Div2_N6 fSAMPLING=fDTS/2, N=6 4 FDTS_Div2_N8 fSAMPLING=fDTS/2, N=8 5 FDTS_Div4_N6 fSAMPLING=fDTS/4, N=6 6 FDTS_Div4_N8 fSAMPLING=fDTS/4, N=8 7 FDTS_Div8_N6 fSAMPLING=fDTS/8, N=6 8 FDTS_Div8_N8 fSAMPLING=fDTS/8, N=8 9 FDTS_Div16_N5 fSAMPLING=fDTS/16, N=5 10 FDTS_Div16_N6 fSAMPLING=fDTS/16, N=6 11 FDTS_Div16_N8 fSAMPLING=fDTS/16, N=8 12 FDTS_Div32_N5 fSAMPLING=fDTS/32, N=5 13 FDTS_Div32_N6 fSAMPLING=fDTS/32, N=6 14 FDTS_Div32_N8 fSAMPLING=fDTS/32, N=8 15 MSM Master/Slave mode 7 1 MSM NoSync No action 0 Sync The effect of an event on the trigger input (TRGI) is delayed to allow a perfect synchronization between the current timer and its slaves (through TRGO). It is useful if we want to synchronize several timers on a single external event. 1 TS Trigger selection 4 3 TS ITR0 Internal Trigger 0 (ITR0) 0 ITR1 Internal Trigger 1 (ITR1) 1 ITR2 Internal Trigger 2 (ITR2) 2 TI1F_ED TI1 Edge Detector (TI1F_ED) 4 TI1FP1 Filtered Timer Input 1 (TI1FP1) 5 TI2FP2 Filtered Timer Input 2 (TI2FP2) 6 ETRF External Trigger input (ETRF) 7 OCCS OCREF clear selection 3 1 SMS Slave mode selection 0 3 SMS Disabled Slave mode disabled - if CEN = ‘1 then the prescaler is clocked directly by the internal clock. 0 Encoder_Mode_1 Encoder mode 1 - Counter counts up/down on TI2FP1 edge depending on TI1FP2 level. 1 Encoder_Mode_2 Encoder mode 2 - Counter counts up/down on TI1FP2 edge depending on TI2FP1 level. 2 Encoder_Mode_3 Encoder mode 3 - Counter counts up/down on both TI1FP1 and TI2FP2 edges depending on the level of the other input. 3 Reset_Mode Reset Mode - Rising edge of the selected trigger input (TRGI) reinitializes the counter and generates an update of the registers. 4 Gated_Mode Gated Mode - The counter clock is enabled when the trigger input (TRGI) is high. The counter stops (but is not reset) as soon as the trigger becomes low. Both start and stop of the counter are controlled. 5 Trigger_Mode Trigger Mode - The counter starts at a rising edge of the trigger TRGI (but it is not reset). Only the start of the counter is controlled. 6 Ext_Clock_Mode External Clock Mode 1 - Rising edges of the selected trigger (TRGI) clock the counter. 7 DIER DIER DMA/Interrupt enable register 0xC 0x10 read-write 0x00000000 TDE Trigger DMA request enable 14 1 TDE Disabled Trigger DMA request disabled 0 Enabled Trigger DMA request enabled 1 COMDE COM DMA request enable 13 1 COMDE Disabled COM DMA request disabled 0 Enabled COM DMA request enabled 1 4 0x1 1-4 CC%sDE Capture/Compare %s DMA request enable 9 1 CC1DE Disabled CCx DMA request disabled 0 Enabled CCx DMA request enabled 1 UDE Update DMA request enable 8 1 UDE Disabled Update DMA request disabled 0 Enabled Update DMA request enabled 1 BIE Break interrupt enable 7 1 BIE Disabled Break interrupt disabled 0 Enabled Break interrupt enabled 1 TIE Trigger interrupt enable 6 1 TIE Disabled Trigger interrupt disabled 0 Enabled Trigger interrupt enabled 1 COMIE COM interrupt enable 5 1 COMIE Disabled COM interrupt disabled 0 Enabled COM interrupt enabled 1 4 0x1 1-4 CC%sIE Capture/Compare %s interrupt enable 1 1 CC1IE Disabled CCx interrupt disabled 0 Enabled CCx interrupt enabled 1 UIE Update interrupt enable 0 1 UIE Disabled Update interrupt disabled 0 Enabled Update interrupt enabled 1 SR SR status register 0x10 0x20 read-write 0x00000000 4 0x1 1-4 CC%sIF Capture/compare %s interrupt flag 1 1 zeroToClear CC1IFR read NoMatch No campture/compare has been detected 0 Match If CC1 is an output: The content of the counter TIMx_CNT matches the content of the TIMx_CCR1 register. If CC1 is an input: The counter value has been captured in TIMx_CCR1 register. 1 CC1IFW write Clear Clear flag 0 CC6IF Compare 6 interrupt flag 17 1 zeroToClear read write CC5IF Compare 5 interrupt flag 16 1 zeroToClear read write SBIF System Break interrupt flag 13 1 zeroToClear SBIFR read NoTrigger No break event occurred 0 Trigger An active level has been detected on the system break input. An interrupt is generated if BIE=1 in the TIMx_DIER register 1 SBIFW write Clear Clear flag 0 4 0x1 1-4 CC%sOF Capture/Compare %s overcapture flag 9 1 zeroToClear CC1OFR read NoOvercapture No overcapture has been detected 0 Overcapture The counter value has been captured in TIMx_CCRx register while CCxIF flag was already set 1 CC1OFW write Clear Clear flag 0 B2IF Break 2 interrupt flag 8 1 zeroToClear B2IFR read NoTrigger No break event occurred 0 Trigger An active level has been detected on the break 2 input. An interrupt is generated if BIE=1 in the TIMx_DIER register 1 B2IFW write Clear Clear flag 0 BIF Break interrupt flag 7 1 zeroToClear BIFR read NoTrigger No break event occurred 0 Trigger An active level has been detected on the break input. An interrupt is generated if BIE=1 in the TIMx_DIER register 1 BIFW write Clear Clear flag 0 TIF Trigger interrupt flag 6 1 zeroToClear TIFR read NoTrigger No trigger event occurred 0 Trigger Trigger interrupt pending 1 TIFW write Clear Clear flag 0 COMIF COM interrupt flag 5 1 zeroToClear COMIFR read NoCOM No COM event occurred 0 COM COM interrupt pending 1 COMIFW write Clear Clear flag 0 UIF Update interrupt flag 0 1 zeroToClear UIFR read NoUpdateOccurred No update occurred 0 UpdatePending Update interrupt pending 1 UIFW write Clear Clear flag 0 EGR EGR event generation register 0x14 0x10 write-only 0x00000000 B2G Break 2 generation 8 1 B2GW Trigger A break 2 event is generated. MOE bit is cleared and B2IF flag is set. Related interrupt can occur if enabled 1 BG Break generation 7 1 BGW Trigger A break event is generated. MOE bit is cleared and BIF flag is set. Related interrupt or DMA transfer can occur if enabled 1 TG Trigger generation 6 1 TGW Trigger The TIF flag is set in TIMx_SR register. Related interrupt or DMA transfer can occur if enabled. 1 COMG Capture/Compare control update generation 5 1 COMGW Trigger When CCPC bit is set, it allows CCxE, CCxNE and OCxM bits to be updated 1 4 0x1 1-4 CC%sG Capture/compare %s generation 1 1 CC1GW Trigger If CC1 is an output: CC1IF flag is set, Corresponding interrupt or DMA request is sent if enabled. If CC1 is an input: The current value of the counter is captured in TIMx_CCR1 register. 1 UG Update generation 0 1 UG Update Re-initializes the timer counter and generates an update of the registers. 1 CCMR1_Output CCMR1_Output capture/compare mode register 1 0x18 0x20 read-write 0x00000000 2 0x8 1-2 OC%sM_3 Output compare %s mode, bit 3 16 1 OC1M_3 Normal Normal output compare mode (modes 0-7) 0 Extended Extended output compare mode (modes 7-15) 1 2 0x8 1-2 OC%sCE Output compare %s clear enable 7 1 OC1CE Disabled OCxRef is not affected by the ETRF signal 0 Enabled OCxRef is cleared as soon as a High level is detected on ETRF signal 1 2 0x8 1-2 OC%sM Output compare %s mode 4 3 OC1M Frozen The comparison between the output compare register TIMx_CCRy and the counter TIMx_CNT has no effect on the outputs / OpmMode1: Retriggerable OPM mode 1 - In up-counting mode, the channel is active until a trigger event is detected (on TRGI signal). In down-counting mode, the channel is inactive 0 ActiveOnMatch Set channel to active level on match. OCyREF signal is forced high when the counter matches the capture/compare register / OpmMode2: Inversely to OpmMode1 1 InactiveOnMatch Set channel to inactive level on match. OCyREF signal is forced low when the counter matches the capture/compare register / Reserved 2 Toggle OCyREF toggles when TIMx_CNT=TIMx_CCRy / Reserved 3 ForceInactive OCyREF is forced low / CombinedPwmMode1: OCyREF has the same behavior as in PWM mode 1. OCyREFC is the logical OR between OC1REF and OC2REF 4 ForceActive OCyREF is forced high / CombinedPwmMode2: OCyREF has the same behavior as in PWM mode 2. OCyREFC is the logical AND between OC1REF and OC2REF 5 PwmMode1 In upcounting, channel is active as long as TIMx_CNT<TIMx_CCRy else inactive. In downcounting, channel is inactive as long as TIMx_CNT>TIMx_CCRy else active / AsymmetricPwmMode1: OCyREF has the same behavior as in PWM mode 1. OCyREFC outputs OC1REF when the counter is counting up, OC2REF when it is counting down 6 PwmMode2 Inversely to PwmMode1 / AsymmetricPwmMode2: Inversely to AsymmetricPwmMode1 7 2 0x8 1-2 OC%sPE Output compare %s preload enable 3 1 OC1PE Disabled Preload register on CCRx disabled. New values written to CCRx are taken into account immediately 0 Enabled Preload register on CCRx enabled. Preload value is loaded into active register on each update event 1 2 0x8 1-2 OC%sFE Output compare %s fast enable 2 1 OC1FE Disabled Fast output disabled 0 Enabled Fast output enabled 1 2 0x8 1-2 CC%sS Capture/Compare %s selection 0 2 CC1S Output CCx channel is configured as output 0 CCMR1_Input CCMR1_Input capture/compare mode register 1 (input mode) CCMR1_Output 0x18 0x20 read-write 0x00000000 2 0x8 1-2 IC%sF Input capture %s filter 4 4 ICFilter NoFilter No filter, sampling is done at fDTS 0 FCK_INT_N2 fSAMPLING=fCK_INT, N=2 1 FCK_INT_N4 fSAMPLING=fCK_INT, N=4 2 FCK_INT_N8 fSAMPLING=fCK_INT, N=8 3 FDTS_Div2_N6 fSAMPLING=fDTS/2, N=6 4 FDTS_Div2_N8 fSAMPLING=fDTS/2, N=8 5 FDTS_Div4_N6 fSAMPLING=fDTS/4, N=6 6 FDTS_Div4_N8 fSAMPLING=fDTS/4, N=8 7 FDTS_Div8_N6 fSAMPLING=fDTS/8, N=6 8 FDTS_Div8_N8 fSAMPLING=fDTS/8, N=8 9 FDTS_Div16_N5 fSAMPLING=fDTS/16, N=5 10 FDTS_Div16_N6 fSAMPLING=fDTS/16, N=6 11 FDTS_Div16_N8 fSAMPLING=fDTS/16, N=8 12 FDTS_Div32_N5 fSAMPLING=fDTS/32, N=5 13 FDTS_Div32_N6 fSAMPLING=fDTS/32, N=6 14 FDTS_Div32_N8 fSAMPLING=fDTS/32, N=8 15 2 0x8 1-2 IC%sPSC Input capture %s prescaler 2 2 ICPrescaler NoPrescaler No prescaler, capture is done each time an edge is detected on the capture input 0 TwoEvents Capture is done once every 2 events 1 FourEvents Capture is done once every 4 events 2 EightEvents Capture is done once every 8 events 3 CC2S Capture/Compare 2 selection 8 2 CC2S TI2 CC2 channel is configured as input, IC2 is mapped on TI2 1 TI1 CC2 channel is configured as input, IC2 is mapped on TI1 2 TRC CC2 channel is configured as input, IC2 is mapped on TRC 3 CC1S Capture/Compare 1 selection 0 2 CC1S TI1 CC1 channel is configured as input, IC1 is mapped on TI1 1 TI2 CC1 channel is configured as input, IC1 is mapped on TI2 2 TRC CC1 channel is configured as input, IC1 is mapped on TRC 3 CCMR2_Output CCMR2_Output capture/compare mode register 2 (output mode) 0x1C 0x20 read-write 0x00000000 2 0x8 3-4 OC%sM_3 Output compare %s mode, bit 3 16 1 2 0x8 3-4 OC%sCE Output compare %s clear enable 7 1 2 0x8 3-4 OC%sM Output compare %s mode 4 3 2 0x8 3-4 OC%sPE Output compare %s preload enable 3 1 2 0x8 3-4 OC%sFE Output compare %s fast enable 2 1 2 0x8 3-4 CC%sS Capture/Compare %s selection 0 2 CCMR2_Input CCMR2_Input capture/compare mode register 2 (input mode) CCMR2_Output 0x1C 0x20 read-write 0x00000000 2 0x8 3-4 IC%sF Input capture %s filter 4 4 2 0x8 3-4 IC%sPSC Input capture %s prescaler 2 2 CC4S Capture/Compare 4 selection 8 2 CC4S TI4 CC4 channel is configured as input, IC4 is mapped on TI4 1 TI3 CC4 channel is configured as input, IC4 is mapped on TI3 2 TRC CC4 channel is configured as input, IC4 is mapped on TRC 3 CC3S Capture/compare 3 selection 0 2 CC3S TI3 CC3 channel is configured as input, IC3 is mapped on TI3 1 TI4 CC3 channel is configured as input, IC3 is mapped on TI4 2 TRC CC3 channel is configured as input, IC3 is mapped on TRC 3 CCER CCER capture/compare enable register 0x20 0x20 read-write 0x00000000 6 0x4 1-6 CC%sP Capture/Compare %s output Polarity 1 1 CC1P RisingEdge Noninverted/rising edge 0 FallingEdge Inverted/falling edge 1 6 0x4 1-6 CC%sE Capture/Compare %s output enable 0 1 CC1E Disabled Capture disabled 0 Enabled Capture enabled 1 4 0x4 1-4 CC%sNP Capture/Compare %s output Polarity 3 1 CC1NP ActiveHigh OCxN active high 0 ActiveLow OCxN active low 1 3 0x4 1-3 CC%sNE Capture/Compare %s complementary output enable 2 1 CC1NE Disabled Complementary output disabled 0 Enabled Complementary output enabled 1 CNT CNT counter 0x24 0x20 read-write 0x00000000 UIFCPY UIF copy 31 1 CNT counter value 0 16 0 65535 CNT16 CNT16 16-bit counter register CNT 0x24 0x10 read-write 0x00000000 CNT counter value 0 16 read-write 0 65535 PSC PSC prescaler 0x28 0x10 read-write 0x00000000 PSC Prescaler value 0 16 0 65535 ARR ARR auto-reload register 0x2C 0x10 read-write 0x0000FFFF ARR Auto-reload value 0 16 0 65535 RCR RCR repetition counter register 0x30 0x20 read-write 0x00000000 REP Repetition counter value 0 16 0 65535 4 0x4 1-4 CCR%s CCR%s capture/compare register 0x34 0x10 read-write 0x00000000 CCR Capture/Compare value 0 16 0 65535 BDTR BDTR break and dead-time register 0x44 0x20 read-write 0x00000000 BKP Break polarity 13 1 BKP ActiveLow Break input BRKx is active low 0 ActiveHigh Break input BRKx is active high 1 BK2P Break 2 polarity 25 1 BKE Break enable 12 1 BKE Disabled Break function x disabled 0 Enabled Break function x enabled 1 BK2E Break 2 enable 24 1 BK2F Break 2 filter 20 4 BKF Break filter 16 4 MOE Main output enable 15 1 MOE DisabledIdle OC/OCN are disabled or forced idle depending on OSSI 0 Enabled OC/OCN are enabled if CCxE/CCxNE are set 1 AOE Automatic output enable 14 1 AOE Manual MOE can be set only by software 0 Automatic MOE can be set by software or automatically at the next update event (if none of the break inputs BRK and BRK2 is active) 1 OSSR Off-state selection for Run mode 11 1 OSSR HiZ When inactive, OC/OCN outputs are disabled 0 IdleLevel When inactive, OC/OCN outputs are enabled with their inactive level 1 OSSI Off-state selection for Idle mode 10 1 OSSI HiZ When inactive, OC/OCN outputs are disabled 0 IdleLevel When inactive, OC/OCN outputs are forced to idle level 1 LOCK Lock configuration 8 2 LOCK Off No bit is write protected 0 Level1 Any bits except MOE, OSSR, OSSI and LOCK in TIMx_BDTR register, OISx and OISxN bits in TIMx_CR2 register can no longer be written 1 Level2 LOCK Level 1 + CC Polarity bits (CCxP/CCxNP bits in TIMx_CCER register, as long as the related channel is configured in output through the CCxS bits) as well as OSSR and OSSI bits can no longer be written 2 Level3 LOCK Level 2 + CC Control bits (OCxM and OCxPE bits in TIMx_CCMRx registers, as long as the related channel is configured in output through the CCxS bits) can no longer be written 3 DTG Dead-time generator setup 0 8 0 255 DCR DCR DMA control register 0x48 0x10 read-write 0x00000000 DBL DMA burst length 8 5 0 18 DBA DMA base address 0 5 0 31 DMAR DMAR DMA address for full transfer 0x4C 0x20 read-write 0x00000000 DMAB DMA register for burst accesses 0 32 OR1 OR1 TIM1 option register 1 0x50 0x20 read-write 0x00000000 ETR_ADC1_RMP External trigger remap on ADC1 analog watchdog 0 2 ETR_ADC3_RMP External trigger remap on ADC3 analog watchdog 2 2 TI1_RMP Input Capture 1 remap 4 1 CCMR3_Output CCMR3_Output capture/compare mode register 2 (output mode) 0x54 0x20 read-write 0x00000000 2 0x8 5-6 OC%sM_3 Output compare %s mode, bit 3 16 1 2 0x8 5-6 OC%sCE Output compare %s clear enable 7 1 2 0x8 5-6 OC%sM Output compare %s mode 4 3 2 0x8 5-6 OC%sPE Output compare %s preload enable 3 1 2 0x8 5-6 OC%sFE Output compare %s fast enable 2 1 CCR5 CCR5 capture/compare register 0x58 0x20 read-write 0x00000000 CCR Capture/Compare value 0 16 0 65535 GC5C1 Group Channel 5 and Channel 1 29 1 GC5C2 Group Channel 5 and Channel 2 30 1 GC5C3 Group Channel 5 and Channel 3 31 1 CCR6 CCR6 capture/compare register 0x5C 0x10 read-write 0x00000000 CCR Capture/Compare value 0 16 0 65535 OR2 OR2 TIM1 option register 2 0x60 0x20 read-write 0x00000001 BKINE BRK BKIN input enable 0 1 BKCMP1E BRK COMP1 enable 1 1 BKCMP2E BRK COMP2 enable 2 1 BKDFBK0E BRK DFSDM_BREAK[0] enable 8 1 BKINP BRK BKIN input polarity 9 1 BKCMP1P BRK COMP1 input polarity 10 1 BKCMP2P BRK COMP2 input polarity 11 1 ETRSEL ETR source selection 14 3 OR3 OR3 TIM1 option register 3 0x64 0x20 read-write 0x00000001 BK2INE BRK2 BKIN input enable 0 1 BK2CMP1E BRK2 COMP1 enable 1 1 BK2CMP2E BRK2 COMP2 enable 2 1 BK2DFBK1E BRK2 DFSDM_BREAK[1] enable 8 1 BK2INP BRK2 BKIN input polarity 9 1 BK2CMP1P BRK2 COMP1 input polarity 10 1 BK2CMP2P BRK2 COMP2 input polarity 11 1 TIM15 General purpose timers TIM 0x40014000 0x0 0x400 registers TIM1_BRK_TIM15 Timer 15 global interrupt 24 CR1 CR1 control register 1 0x0 0x10 read-write 0x00000000 CEN Counter enable 0 1 CEN Disabled Counter disabled 0 Enabled Counter enabled 1 UDIS Update disable 1 1 UDIS Enabled Update event enabled 0 Disabled Update event disabled 1 URS Update request source 2 1 URS AnyEvent Any of counter overflow/underflow, setting UG, or update through slave mode, generates an update interrupt or DMA request 0 CounterOnly Only counter overflow/underflow generates an update interrupt or DMA request 1 OPM One-pulse mode 3 1 OPM Disabled Counter is not stopped at update event 0 Enabled Counter stops counting at the next update event (clearing the CEN bit) 1 ARPE Auto-reload preload enable 7 1 ARPE Disabled TIMx_APRR register is not buffered 0 Enabled TIMx_APRR register is buffered 1 CKD Clock division 8 2 CKD Div1 t_DTS = t_CK_INT 0 Div2 t_DTS = 2 × t_CK_INT 1 Div4 t_DTS = 4 × t_CK_INT 2 UIFREMAP UIF status bit remapping 11 1 CR2 CR2 control register 2 0x4 0x10 read-write 0x00000000 2 0x2 1-2 OIS%s Output Idle state (OC%s output) 8 1 OIS1 Reset OCx=0 (after a dead-time if OCx(N) is implemented) when MOE=0 0 Set OCx=1 (after a dead-time if OCx(N) is implemented) when MOE=0 1 1 0x0 1-1 OIS%sN Output Idle state (OC%sN output) 9 1 OIS1N Reset OCxN=0 after a dead-time when MOE=0 0 Set OCxN=1 after a dead-time when MOE=0 1 TI1S TI1 selection 7 1 MMS Master mode selection 4 3 CCDS Capture/compare DMA selection 3 1 CCDS OnCompare CCx DMA request sent when CCx event occurs 0 OnUpdate CCx DMA request sent when update event occurs 1 CCUS Capture/compare control update selection 2 1 CCUS Sw When capture/compare control bits are preloaded (CCPC=1), they are updated by setting the COMG bit only 0 SwOrEdge When capture/compare control bits are preloaded (CCPC=1), they are updated by setting the COMG bit or when an rising edge occurs on TRGI 1 CCPC Capture/compare preloaded control 0 1 CCPC NotPreloaded CCxE, CCxNE and OCxM bits are not preloaded 0 Preloaded CCxE, CCxNE and OCxM bits are preloaded 1 SMCR SMCR slave mode control register 0x8 0x20 read-write 0x00000000 SMS Slave mode selection 0 3 TS Trigger selection 4 3 MSM Master/slave mode 7 1 SMS_3 Slave mode selection - bit 3 16 1 DIER DIER DMA/Interrupt enable register 0xC 0x10 read-write 0x00000000 TDE Trigger DMA request enable 14 1 TDE Disabled Trigger DMA request disabled 0 Enabled Trigger DMA request enabled 1 COMDE COM DMA request enable 13 1 COMDE Disabled COM DMA request disabled 0 Enabled COM DMA request enabled 1 2 0x1 1-2 CC%sDE Capture/Compare %s DMA request enable 9 1 CC1DE Disabled CCx DMA request disabled 0 Enabled CCx DMA request enabled 1 UDE Update DMA request enable 8 1 UDE Disabled Update DMA request disabled 0 Enabled Update DMA request enabled 1 BIE Break interrupt enable 7 1 BIE Disabled Break interrupt disabled 0 Enabled Break interrupt enabled 1 TIE Trigger interrupt enable 6 1 TIE Disabled Trigger interrupt disabled 0 Enabled Trigger interrupt enabled 1 COMIE COM interrupt enable 5 1 COMIE Disabled COM interrupt disabled 0 Enabled COM interrupt enabled 1 2 0x1 1-2 CC%sIE Capture/Compare %s interrupt enable 1 1 CC1IE Disabled CCx interrupt disabled 0 Enabled CCx interrupt enabled 1 UIE Update interrupt enable 0 1 UIE Disabled Update interrupt disabled 0 Enabled Update interrupt enabled 1 SR SR status register 0x10 0x10 read-write 0x00000000 2 0x1 1-2 CC%sOF Capture/Compare %s overcapture flag 9 1 zeroToClear CC1OFR read NoOvercapture No overcapture has been detected 0 Overcapture The counter value has been captured in TIMx_CCRx register while CCxIF flag was already set 1 CC1OFW write Clear Clear flag 0 BIF Break interrupt flag 7 1 zeroToClear BIFR read NoTrigger No break event occurred 0 Trigger An active level has been detected on the break input. An interrupt is generated if BIE=1 in the TIMx_DIER register 1 BIFW write Clear Clear flag 0 TIF Trigger interrupt flag 6 1 zeroToClear TIFR read NoTrigger No trigger event occurred 0 Trigger Trigger interrupt pending 1 TIFW write Clear Clear flag 0 COMIF COM interrupt flag 5 1 zeroToClear COMIFR read NoCOM No COM event occurred 0 COM COM interrupt pending 1 COMIFW write Clear Clear flag 0 2 0x1 1-2 CC%sIF Capture/compare %s interrupt flag 1 1 zeroToClear CC1IFR read NoMatch No campture/compare has been detected 0 Match If CC1 is an output: The content of the counter TIMx_CNT matches the content of the TIMx_CCR1 register. If CC1 is an input: The counter value has been captured in TIMx_CCR1 register. 1 CC1IFW write Clear Clear flag 0 UIF Update interrupt flag 0 1 zeroToClear UIFR read NoUpdateOccurred No update occurred 0 UpdatePending Update interrupt pending 1 UIFW write Clear Clear flag 0 EGR EGR event generation register 0x14 0x10 0x00000000 BG Break generation 7 1 write-only BGW Trigger A break event is generated. MOE bit is cleared and BIF flag is set. Related interrupt or DMA transfer can occur if enabled 1 TG Trigger generation 6 1 write-only TGW Trigger The TIF flag is set in TIMx_SR register. Related interrupt or DMA transfer can occur if enabled. 1 COMG Capture/Compare control update generation 5 1 read-write COMGW write Trigger When CCPC bit is set, it allows CCxE, CCxNE and OCxM bits to be updated 1 2 0x1 1-2 CC%sG Capture/compare %s generation 1 1 write-only CC1GW Trigger If CC1 is an output: CC1IF flag is set, Corresponding interrupt or DMA request is sent if enabled. If CC1 is an input: The current value of the counter is captured in TIMx_CCR1 register. 1 UG Update generation 0 1 write-only UG Update Re-initializes the timer counter and generates an update of the registers. 1 CCMR1_Output CCMR1_Output capture/compare mode register (output mode) 0x18 0x20 read-write 0x00000000 2 0x8 1-2 OC%sM_3 Output compare %s mode, bit 3 16 1 OC1M_3 Normal Normal output compare mode (modes 0-7) 0 Extended Extended output compare mode (modes 7-15) 1 2 0x8 1-2 OC%sM Output compare %s mode 4 3 OC1M Frozen The comparison between the output compare register TIMx_CCRy and the counter TIMx_CNT has no effect on the outputs / OpmMode1: Retriggerable OPM mode 1 - In up-counting mode, the channel is active until a trigger event is detected (on TRGI signal). In down-counting mode, the channel is inactive 0 ActiveOnMatch Set channel to active level on match. OCyREF signal is forced high when the counter matches the capture/compare register / OpmMode2: Inversely to OpmMode1 1 InactiveOnMatch Set channel to inactive level on match. OCyREF signal is forced low when the counter matches the capture/compare register / Reserved 2 Toggle OCyREF toggles when TIMx_CNT=TIMx_CCRy / Reserved 3 ForceInactive OCyREF is forced low / CombinedPwmMode1: OCyREF has the same behavior as in PWM mode 1. OCyREFC is the logical OR between OC1REF and OC2REF 4 ForceActive OCyREF is forced high / CombinedPwmMode2: OCyREF has the same behavior as in PWM mode 2. OCyREFC is the logical AND between OC1REF and OC2REF 5 PwmMode1 In upcounting, channel is active as long as TIMx_CNT<TIMx_CCRy else inactive. In downcounting, channel is inactive as long as TIMx_CNT>TIMx_CCRy else active / Reserved 6 PwmMode2 Inversely to PwmMode1 / Reserved 7 2 0x8 1-2 OC%sPE Output compare %s preload enable 3 1 OC1PE Disabled Preload register on CCRx disabled. New values written to CCRx are taken into account immediately 0 Enabled Preload register on CCRx enabled. Preload value is loaded into active register on each update event 1 2 0x8 1-2 OC%sFE Output compare %s fast enable 2 1 OC1FE Disabled Fast output disabled 0 Enabled Fast output enabled 1 2 0x8 1-2 CC%sS Capture/Compare %s selection 0 2 CC1S Output CCx channel is configured as output 0 CCMR1_Input CCMR1_Input capture/compare mode register 1 (input mode) CCMR1_Output 0x18 0x20 read-write 0x00000000 2 0x8 1-2 IC%sF Input capture %s filter 4 4 ICFilter NoFilter No filter, sampling is done at fDTS 0 FCK_INT_N2 fSAMPLING=fCK_INT, N=2 1 FCK_INT_N4 fSAMPLING=fCK_INT, N=4 2 FCK_INT_N8 fSAMPLING=fCK_INT, N=8 3 FDTS_Div2_N6 fSAMPLING=fDTS/2, N=6 4 FDTS_Div2_N8 fSAMPLING=fDTS/2, N=8 5 FDTS_Div4_N6 fSAMPLING=fDTS/4, N=6 6 FDTS_Div4_N8 fSAMPLING=fDTS/4, N=8 7 FDTS_Div8_N6 fSAMPLING=fDTS/8, N=6 8 FDTS_Div8_N8 fSAMPLING=fDTS/8, N=8 9 FDTS_Div16_N5 fSAMPLING=fDTS/16, N=5 10 FDTS_Div16_N6 fSAMPLING=fDTS/16, N=6 11 FDTS_Div16_N8 fSAMPLING=fDTS/16, N=8 12 FDTS_Div32_N5 fSAMPLING=fDTS/32, N=5 13 FDTS_Div32_N6 fSAMPLING=fDTS/32, N=6 14 FDTS_Div32_N8 fSAMPLING=fDTS/32, N=8 15 2 0x8 1-2 IC%sPSC Input capture %s prescaler 2 2 ICPrescaler NoPrescaler No prescaler, capture is done each time an edge is detected on the capture input 0 TwoEvents Capture is done once every 2 events 1 FourEvents Capture is done once every 4 events 2 EightEvents Capture is done once every 8 events 3 CC2S Capture/Compare 2 selection 8 2 CC2S TI2 CC2 channel is configured as input, IC2 is mapped on TI2 1 TI1 CC2 channel is configured as input, IC2 is mapped on TI1 2 TRC CC2 channel is configured as input, IC2 is mapped on TRC 3 CC1S Capture/Compare 1 selection 0 2 CC1S TI1 CC1 channel is configured as input, IC1 is mapped on TI1 1 TI2 CC1 channel is configured as input, IC1 is mapped on TI2 2 TRC CC1 channel is configured as input, IC1 is mapped on TRC 3 CCER CCER capture/compare enable register 0x20 0x10 read-write 0x00000000 2 0x4 1-2 CC%sNP Capture/Compare %s output Polarity 3 1 CC1NP ActiveHigh OCxN active high 0 ActiveLow OCxN active low 1 2 0x4 1-2 CC%sP Capture/Compare %s output Polarity 1 1 CC1P RisingEdge Noninverted/rising edge 0 FallingEdge Inverted/falling edge 1 2 0x4 1-2 CC%sE Capture/Compare %s output enable 0 1 CC1E Disabled Capture disabled 0 Enabled Capture enabled 1 1 0x0 1-1 CC%sNE Capture/Compare %s complementary output enable 2 1 CC1NE Disabled Complementary output disabled 0 Enabled Complementary output enabled 1 CNT CNT counter 0x24 0x20 0x00000000 CNT counter value 0 16 read-write 0 65535 UIFCPY UIF Copy 31 1 read-only CNT16 CNT16 16-bit counter register CNT 0x24 0x10 read-write 0x00000000 CNT counter value 0 16 read-write 0 65535 PSC PSC prescaler 0x28 0x10 read-write 0x00000000 PSC Prescaler value 0 16 0 65535 ARR ARR auto-reload register 0x2C 0x10 read-write 0x0000FFFF ARR Auto-reload value 0 16 0 65535 RCR RCR repetition counter register 0x30 0x10 read-write 0x00000000 REP Repetition counter value 0 8 0 255 2 0x4 1-2 CCR%s CCR%s capture/compare register 0x34 0x10 read-write 0x00000000 CCR Capture/Compare value 0 16 0 65535 BDTR BDTR break and dead-time register 0x44 0x20 read-write 0x00000000 DTG Dead-time generator setup 0 8 0 255 LOCK Lock configuration 8 2 LOCK Off No bit is write protected 0 Level1 Any bits except MOE, OSSR, OSSI and LOCK in TIMx_BDTR register, OISx and OISxN bits in TIMx_CR2 register can no longer be written 1 Level2 LOCK Level 1 + CC Polarity bits (CCxP/CCxNP bits in TIMx_CCER register, as long as the related channel is configured in output through the CCxS bits) as well as OSSR and OSSI bits can no longer be written 2 Level3 LOCK Level 2 + CC Control bits (OCxM and OCxPE bits in TIMx_CCMRx registers, as long as the related channel is configured in output through the CCxS bits) can no longer be written 3 OSSI Off-state selection for Idle mode 10 1 OSSI HiZ When inactive, OC/OCN outputs are disabled 0 IdleLevel When inactive, OC/OCN outputs are forced to idle level 1 OSSR Off-state selection for Run mode 11 1 OSSR HiZ When inactive, OC/OCN outputs are disabled 0 IdleLevel When inactive, OC/OCN outputs are enabled with their inactive level 1 BKE Break enable 12 1 BKE Disabled Break function x disabled 0 Enabled Break function x enabled 1 BKP Break polarity 13 1 BKP ActiveLow Break input BRKx is active low 0 ActiveHigh Break input BRKx is active high 1 AOE Automatic output enable 14 1 AOE Manual MOE can be set only by software 0 Automatic MOE can be set by software or automatically at the next update event (if none of the break inputs BRK and BRK2 is active) 1 MOE Main output enable 15 1 MOE DisabledIdle OC/OCN are disabled or forced idle depending on OSSI 0 Enabled OC/OCN are enabled if CCxE/CCxNE are set 1 DCR DCR DMA control register 0x48 0x10 read-write 0x00000000 DBL DMA burst length 8 5 DBA DMA base address 0 5 DMAR DMAR DMA address for full transfer 0x4C 0x10 read-write 0x00000000 DMAB DMA register for burst accesses 0 16 OR1 OR1 TIM15 option register 1 0x50 0x20 read-write 0x00000000 TI1_RMP Input capture 1 remap 0 1 ENCODER_MODE Encoder mode 1 2 OR2 OR2 TIM15 option register 2 0x60 0x20 read-write 0x00000001 BKINE BRK BKIN input enable 0 1 BKCMP1E BRK COMP1 enable 1 1 BKCMP2E BRK COMP2 enable 2 1 BKDFBK0E BRK DFSDM_BREAK[0] enablee 8 1 BKINP BRK BKIN input polarity 9 1 BKCMP1P BRK COMP1 input polarity 10 1 BKCMP2P BRK COMP2 input polarity 11 1 TIM16 General purpose timers TIM 0x40014400 0x0 0x400 registers TIM1_TRG_COM TIM1 trigger and commutation interrupt 26 TIM1_CC TIM1 Capture Compare interrupt 27 CR1 CR1 control register 1 0x0 0x10 read-write 0x00000000 CEN Counter enable 0 1 CEN Disabled Counter disabled 0 Enabled Counter enabled 1 UDIS Update disable 1 1 UDIS Enabled Update event enabled 0 Disabled Update event disabled 1 URS Update request source 2 1 URS AnyEvent Any of counter overflow/underflow, setting UG, or update through slave mode, generates an update interrupt or DMA request 0 CounterOnly Only counter overflow/underflow generates an update interrupt or DMA request 1 OPM One-pulse mode 3 1 OPM Disabled Counter is not stopped at update event 0 Enabled Counter stops counting at the next update event (clearing the CEN bit) 1 ARPE Auto-reload preload enable 7 1 ARPE Disabled TIMx_APRR register is not buffered 0 Enabled TIMx_APRR register is buffered 1 CKD Clock division 8 2 CKD Div1 t_DTS = t_CK_INT 0 Div2 t_DTS = 2 × t_CK_INT 1 Div4 t_DTS = 4 × t_CK_INT 2 UIFREMAP UIF status bit remapping 11 1 CR2 CR2 control register 2 0x4 0x10 read-write 0x00000000 1 0x0 1-1 OIS%sN Output Idle state (OC%sN output) 9 1 OIS1N Reset OCxN=0 after a dead-time when MOE=0 0 Set OCxN=1 after a dead-time when MOE=0 1 1 0x0 1-1 OIS%s Output Idle state (OC%s output) 8 1 OIS1 Reset OCx=0 (after a dead-time if OCx(N) is implemented) when MOE=0 0 Set OCx=1 (after a dead-time if OCx(N) is implemented) when MOE=0 1 CCDS Capture/compare DMA selection 3 1 CCDS OnCompare CCx DMA request sent when CCx event occurs 0 OnUpdate CCx DMA request sent when update event occurs 1 CCUS Capture/compare control update selection 2 1 CCUS Sw When capture/compare control bits are preloaded (CCPC=1), they are updated by setting the COMG bit only 0 SwOrEdge When capture/compare control bits are preloaded (CCPC=1), they are updated by setting the COMG bit or when an rising edge occurs on TRGI 1 CCPC Capture/compare preloaded control 0 1 CCPC NotPreloaded CCxE, CCxNE and OCxM bits are not preloaded 0 Preloaded CCxE, CCxNE and OCxM bits are preloaded 1 DIER DIER DMA/Interrupt enable register 0xC 0x10 read-write 0x00000000 TDE Trigger DMA request enable 14 1 COMDE COM DMA request enable 13 1 1 0x0 1-1 CC%sDE Capture/Compare %s DMA request enable 9 1 CC1DE Disabled CCx DMA request disabled 0 Enabled CCx DMA request enabled 1 UDE Update DMA request enable 8 1 UDE Disabled Update DMA request disabled 0 Enabled Update DMA request enabled 1 BIE Break interrupt enable 7 1 BIE Disabled Break interrupt disabled 0 Enabled Break interrupt enabled 1 COMIE COM interrupt enable 5 1 COMIE Disabled COM interrupt disabled 0 Enabled COM interrupt enabled 1 1 0x0 1-1 CC%sIE Capture/Compare %s interrupt enable 1 1 CC1IE Disabled CCx interrupt disabled 0 Enabled CCx interrupt enabled 1 UIE Update interrupt enable 0 1 UIE Disabled Update interrupt disabled 0 Enabled Update interrupt enabled 1 SR SR status register 0x10 0x10 read-write 0x00000000 1 0x0 1-1 CC%sOF Capture/Compare %s overcapture flag 9 1 zeroToClear CC1OFR read NoOvercapture No overcapture has been detected 0 Overcapture The counter value has been captured in TIMx_CCRx register while CCxIF flag was already set 1 CC1OFW write Clear Clear flag 0 BIF Break interrupt flag 7 1 zeroToClear BIFR read NoTrigger No break event occurred 0 Trigger An active level has been detected on the break input. An interrupt is generated if BIE=1 in the TIMx_DIER register 1 BIFW write Clear Clear flag 0 COMIF COM interrupt flag 5 1 zeroToClear COMIFR read NoCOM No COM event occurred 0 COM COM interrupt pending 1 COMIFW write Clear Clear flag 0 1 0x0 1-1 CC%sIF Capture/compare %s interrupt flag 1 1 zeroToClear CC1IFR read NoMatch No campture/compare has been detected 0 Match If CC1 is an output: The content of the counter TIMx_CNT matches the content of the TIMx_CCR1 register. If CC1 is an input: The counter value has been captured in TIMx_CCR1 register. 1 CC1IFW write Clear Clear flag 0 UIF Update interrupt flag 0 1 zeroToClear UIFR read NoUpdateOccurred No update occurred 0 UpdatePending Update interrupt pending 1 UIFW write Clear Clear flag 0 EGR EGR event generation register 0x14 0x10 write-only 0x00000000 BG Break generation 7 1 BGW Trigger A break event is generated. MOE bit is cleared and BIF flag is set. Related interrupt or DMA transfer can occur if enabled 1 COMG Capture/Compare control update generation 5 1 COMGW Trigger When CCPC bit is set, it allows CCxE, CCxNE and OCxM bits to be updated 1 1 0x0 1-1 CC%sG Capture/compare %s generation 1 1 CC1GW Trigger If CC1 is an output: CC1IF flag is set, Corresponding interrupt or DMA request is sent if enabled. If CC1 is an input: The current value of the counter is captured in TIMx_CCR1 register. 1 UG Update generation 0 1 UG Update Re-initializes the timer counter and generates an update of the registers. 1 CCMR1_Output CCMR1_Output capture/compare mode register (output mode) 0x18 0x20 read-write 0x00000000 1 0x0 1-1 OC%sM_3 Output compare %s mode, bit 3 16 1 1 0x0 1-1 OC%sM Output compare %s mode 4 3 OC1M Frozen The comparison between the output compare register TIMx_CCRy and the counter TIMx_CNT has no effect on the outputs 0 ActiveOnMatch Set channel to active level on match. OCyREF signal is forced high when the counter matches the capture/compare register 1 InactiveOnMatch Set channel to inactive level on match. OCyREF signal is forced low when the counter matches the capture/compare register 2 Toggle OCyREF toggles when TIMx_CNT=TIMx_CCRy 3 ForceInactive OCyREF is forced low 4 ForceActive OCyREF is forced high 5 PwmMode1 In upcounting, channel is active as long as TIMx_CNT<TIMx_CCRy else inactive. In downcounting, channel is inactive as long as TIMx_CNT>TIMx_CCRy else active 6 PwmMode2 Inversely to PwmMode1 7 1 0x0 1-1 OC%sPE Output compare %s preload enable 3 1 OC1PE Disabled Preload register on CCRx disabled. New values written to CCRx are taken into account immediately 0 Enabled Preload register on CCRx enabled. Preload value is loaded into active register on each update event 1 1 0x0 1-1 OC%sFE Output compare %s fast enable 2 1 OC1FE Disabled Fast output disabled 0 Enabled Fast output enabled 1 1 0x0 1-1 CC%sS Capture/Compare %s selection 0 2 CC1S Output CCx channel is configured as output 0 CCMR1_Input CCMR1_Input capture/compare mode register 1 (input mode) CCMR1_Output 0x18 0x20 read-write 0x00000000 1 0x0 1-1 IC%sF Input capture %s filter 4 4 ICFilter NoFilter No filter, sampling is done at fDTS 0 FCK_INT_N2 fSAMPLING=fCK_INT, N=2 1 FCK_INT_N4 fSAMPLING=fCK_INT, N=4 2 FCK_INT_N8 fSAMPLING=fCK_INT, N=8 3 FDTS_Div2_N6 fSAMPLING=fDTS/2, N=6 4 FDTS_Div2_N8 fSAMPLING=fDTS/2, N=8 5 FDTS_Div4_N6 fSAMPLING=fDTS/4, N=6 6 FDTS_Div4_N8 fSAMPLING=fDTS/4, N=8 7 FDTS_Div8_N6 fSAMPLING=fDTS/8, N=6 8 FDTS_Div8_N8 fSAMPLING=fDTS/8, N=8 9 FDTS_Div16_N5 fSAMPLING=fDTS/16, N=5 10 FDTS_Div16_N6 fSAMPLING=fDTS/16, N=6 11 FDTS_Div16_N8 fSAMPLING=fDTS/16, N=8 12 FDTS_Div32_N5 fSAMPLING=fDTS/32, N=5 13 FDTS_Div32_N6 fSAMPLING=fDTS/32, N=6 14 FDTS_Div32_N8 fSAMPLING=fDTS/32, N=8 15 1 0x0 1-1 IC%sPSC Input capture %s prescaler 2 2 ICPrescaler NoPrescaler No prescaler, capture is done each time an edge is detected on the capture input 0 TwoEvents Capture is done once every 2 events 1 FourEvents Capture is done once every 4 events 2 EightEvents Capture is done once every 8 events 3 CC1S Capture/Compare 1 selection 0 2 CC1S TI1 CC1 channel is configured as input, IC1 is mapped on TI1 1 CCER CCER capture/compare enable register 0x20 0x10 read-write 0x00000000 1 0x0 1-1 CC%sNP Capture/Compare %s output Polarity 3 1 CC1NP ActiveHigh OCxN active high 0 ActiveLow OCxN active low 1 1 0x0 1-1 CC%sNE Capture/Compare %s complementary output enable 2 1 CC1NE Disabled Complementary output disabled 0 Enabled Complementary output enabled 1 1 0x0 1-1 CC%sP Capture/Compare %s output Polarity 1 1 CC1P RisingEdge Noninverted/rising edge 0 FallingEdge Inverted/falling edge 1 1 0x0 1-1 CC%sE Capture/Compare %s output enable 0 1 CC1E Disabled Capture disabled 0 Enabled Capture enabled 1 CNT CNT counter 0x24 0x20 0x00000000 CNT counter value 0 16 read-write 0 65535 UIFCPY UIF Copy 31 1 read-only CNT16 CNT16 16-bit counter register CNT 0x24 0x10 read-write 0x00000000 CNT counter value 0 16 read-write 0 65535 PSC PSC prescaler 0x28 0x10 read-write 0x00000000 PSC Prescaler value 0 16 0 65535 ARR ARR auto-reload register 0x2C 0x10 read-write 0x0000FFFF ARR Auto-reload value 0 16 0 65535 RCR RCR repetition counter register 0x30 0x10 read-write 0x00000000 REP Repetition counter value 0 8 0 255 1 0x2 1-1 CCR%s CCR%s capture/compare register 0x34 0x10 read-write 0x00000000 CCR Capture/Compare value 0 16 0 65535 BDTR BDTR break and dead-time register 0x44 0x20 read-write 0x00000000 DTG Dead-time generator setup 0 8 0 255 LOCK Lock configuration 8 2 LOCK Off No bit is write protected 0 Level1 Any bits except MOE, OSSR, OSSI and LOCK in TIMx_BDTR register, OISx and OISxN bits in TIMx_CR2 register can no longer be written 1 Level2 LOCK Level 1 + CC Polarity bits (CCxP/CCxNP bits in TIMx_CCER register, as long as the related channel is configured in output through the CCxS bits) as well as OSSR and OSSI bits can no longer be written 2 Level3 LOCK Level 2 + CC Control bits (OCxM and OCxPE bits in TIMx_CCMRx registers, as long as the related channel is configured in output through the CCxS bits) can no longer be written 3 OSSI Off-state selection for Idle mode 10 1 OSSI HiZ When inactive, OC/OCN outputs are disabled 0 IdleLevel When inactive, OC/OCN outputs are forced to idle level 1 OSSR Off-state selection for Run mode 11 1 OSSR HiZ When inactive, OC/OCN outputs are disabled 0 IdleLevel When inactive, OC/OCN outputs are enabled with their inactive level 1 BKE Break enable 12 1 BKE Disabled Break function x disabled 0 Enabled Break function x enabled 1 BKP Break polarity 13 1 BKP ActiveLow Break input BRKx is active low 0 ActiveHigh Break input BRKx is active high 1 AOE Automatic output enable 14 1 AOE Manual MOE can be set only by software 0 Automatic MOE can be set by software or automatically at the next update event (if none of the break inputs BRK and BRK2 is active) 1 MOE Main output enable 15 1 MOE DisabledIdle OC/OCN are disabled or forced idle depending on OSSI 0 Enabled OC/OCN are enabled if CCxE/CCxNE are set 1 DCR DCR DMA control register 0x48 0x10 read-write 0x00000000 DBL DMA burst length 8 5 DBA DMA base address 0 5 DMAR DMAR DMA address for full transfer 0x4C 0x10 read-write 0x00000000 DMAB DMA register for burst accesses 0 16 OR1 OR1 TIM16 option register 1 0x50 0x20 read-write 0x00000000 TI1_RMP Input capture 1 remap 0 2 OR2 OR2 TIM17 option register 1 0x60 0x20 read-write 0x00000001 BKINE BRK BKIN input enable 0 1 BKCMP1E BRK COMP1 enable 1 1 BKCMP2E BRK COMP2 enable 2 1 BKDFBK1E BRK DFSDM_BREAK[1] enable 8 1 BKINP BRK BKIN input polarity 9 1 BKCMP1P BRK COMP1 input polarity 10 1 BKCMP2P BRK COMP2 input polarit 11 1 TIM2 General-purpose-timers TIM 0x40000000 0x0 0x400 registers TIM16 Timer 16 global interrupt 25 CR1 CR1 control register 1 0x0 0x10 read-write 0x00000000 UIFREMAP UIF status bit remapping 11 1 CKD Clock division 8 2 CKD Div1 t_DTS = t_CK_INT 0 Div2 t_DTS = 2 × t_CK_INT 1 Div4 t_DTS = 4 × t_CK_INT 2 ARPE Auto-reload preload enable 7 1 ARPE Disabled TIMx_APRR register is not buffered 0 Enabled TIMx_APRR register is buffered 1 CMS Center-aligned mode selection 5 2 CMS EdgeAligned The counter counts up or down depending on the direction bit 0 CenterAligned1 The counter counts up and down alternatively. Output compare interrupt flags are set only when the counter is counting down. 1 CenterAligned2 The counter counts up and down alternatively. Output compare interrupt flags are set only when the counter is counting up. 2 CenterAligned3 The counter counts up and down alternatively. Output compare interrupt flags are set both when the counter is counting up or down. 3 DIR Direction 4 1 DIR Up Counter used as upcounter 0 Down Counter used as downcounter 1 OPM One-pulse mode 3 1 OPM Disabled Counter is not stopped at update event 0 Enabled Counter stops counting at the next update event (clearing the CEN bit) 1 URS Update request source 2 1 URS AnyEvent Any of counter overflow/underflow, setting UG, or update through slave mode, generates an update interrupt or DMA request 0 CounterOnly Only counter overflow/underflow generates an update interrupt or DMA request 1 UDIS Update disable 1 1 UDIS Enabled Update event enabled 0 Disabled Update event disabled 1 CEN Counter enable 0 1 CEN Disabled Counter disabled 0 Enabled Counter enabled 1 CR2 CR2 control register 2 0x4 0x10 read-write 0x00000000 TI1S TI1 selection 7 1 TI1S Normal The TIMx_CH1 pin is connected to TI1 input 0 XOR The TIMx_CH1, CH2, CH3 pins are connected to TI1 input 1 MMS Master mode selection 4 3 MMS Reset The UG bit from the TIMx_EGR register is used as trigger output 0 Enable The counter enable signal, CNT_EN, is used as trigger output 1 Update The update event is selected as trigger output 2 ComparePulse The trigger output send a positive pulse when the CC1IF flag it to be set, as soon as a capture or a compare match occurred 3 CompareOC1 OC1REF signal is used as trigger output 4 CompareOC2 OC2REF signal is used as trigger output 5 CompareOC3 OC3REF signal is used as trigger output 6 CompareOC4 OC4REF signal is used as trigger output 7 CCDS Capture/compare DMA selection 3 1 CCDS OnCompare CCx DMA request sent when CCx event occurs 0 OnUpdate CCx DMA request sent when update event occurs 1 SMCR SMCR slave mode control register 0x8 0x20 read-write 0x00000000 SMS_3 Slave mode selection - bit 3 16 1 ETP External trigger polarity 15 1 ETP NotInverted ETR is noninverted, active at high level or rising edge 0 Inverted ETR is inverted, active at low level or falling edge 1 ECE External clock enable 14 1 ECE Disabled External clock mode 2 disabled 0 Enabled External clock mode 2 enabled. The counter is clocked by any active edge on the ETRF signal. 1 ETPS External trigger prescaler 12 2 ETPS Div1 Prescaler OFF 0 Div2 ETRP frequency divided by 2 1 Div4 ETRP frequency divided by 4 2 Div8 ETRP frequency divided by 8 3 ETF External trigger filter 8 4 ETF NoFilter No filter, sampling is done at fDTS 0 FCK_INT_N2 fSAMPLING=fCK_INT, N=2 1 FCK_INT_N4 fSAMPLING=fCK_INT, N=4 2 FCK_INT_N8 fSAMPLING=fCK_INT, N=8 3 FDTS_Div2_N6 fSAMPLING=fDTS/2, N=6 4 FDTS_Div2_N8 fSAMPLING=fDTS/2, N=8 5 FDTS_Div4_N6 fSAMPLING=fDTS/4, N=6 6 FDTS_Div4_N8 fSAMPLING=fDTS/4, N=8 7 FDTS_Div8_N6 fSAMPLING=fDTS/8, N=6 8 FDTS_Div8_N8 fSAMPLING=fDTS/8, N=8 9 FDTS_Div16_N5 fSAMPLING=fDTS/16, N=5 10 FDTS_Div16_N6 fSAMPLING=fDTS/16, N=6 11 FDTS_Div16_N8 fSAMPLING=fDTS/16, N=8 12 FDTS_Div32_N5 fSAMPLING=fDTS/32, N=5 13 FDTS_Div32_N6 fSAMPLING=fDTS/32, N=6 14 FDTS_Div32_N8 fSAMPLING=fDTS/32, N=8 15 MSM Master/Slave mode 7 1 MSM NoSync No action 0 Sync The effect of an event on the trigger input (TRGI) is delayed to allow a perfect synchronization between the current timer and its slaves (through TRGO). It is useful if we want to synchronize several timers on a single external event. 1 TS Trigger selection 4 3 TS ITR0 Internal Trigger 0 (ITR0) 0 ITR1 Internal Trigger 1 (ITR1) 1 ITR2 Internal Trigger 2 (ITR2) 2 TI1F_ED TI1 Edge Detector (TI1F_ED) 4 TI1FP1 Filtered Timer Input 1 (TI1FP1) 5 TI2FP2 Filtered Timer Input 2 (TI2FP2) 6 ETRF External Trigger input (ETRF) 7 OCCS OCREF clear selection 3 1 SMS Slave mode selection 0 3 SMS Disabled Slave mode disabled - if CEN = ‘1 then the prescaler is clocked directly by the internal clock. 0 Encoder_Mode_1 Encoder mode 1 - Counter counts up/down on TI2FP1 edge depending on TI1FP2 level. 1 Encoder_Mode_2 Encoder mode 2 - Counter counts up/down on TI1FP2 edge depending on TI2FP1 level. 2 Encoder_Mode_3 Encoder mode 3 - Counter counts up/down on both TI1FP1 and TI2FP2 edges depending on the level of the other input. 3 Reset_Mode Reset Mode - Rising edge of the selected trigger input (TRGI) reinitializes the counter and generates an update of the registers. 4 Gated_Mode Gated Mode - The counter clock is enabled when the trigger input (TRGI) is high. The counter stops (but is not reset) as soon as the trigger becomes low. Both start and stop of the counter are controlled. 5 Trigger_Mode Trigger Mode - The counter starts at a rising edge of the trigger TRGI (but it is not reset). Only the start of the counter is controlled. 6 Ext_Clock_Mode External Clock Mode 1 - Rising edges of the selected trigger (TRGI) clock the counter. 7 DIER DIER DMA/Interrupt enable register 0xC 0x10 read-write 0x00000000 TDE Trigger DMA request enable 14 1 TDE Disabled Trigger DMA request disabled 0 Enabled Trigger DMA request enabled 1 4 0x1 1-4 CC%sDE Capture/Compare %s DMA request enable 9 1 CC1DE Disabled CCx DMA request disabled 0 Enabled CCx DMA request enabled 1 UDE Update DMA request enable 8 1 UDE Disabled Update DMA request disabled 0 Enabled Update DMA request enabled 1 TIE Trigger interrupt enable 6 1 TIE Disabled Trigger interrupt disabled 0 Enabled Trigger interrupt enabled 1 4 0x1 1-4 CC%sIE Capture/Compare %s interrupt enable 1 1 CC1IE Disabled CCx interrupt disabled 0 Enabled CCx interrupt enabled 1 UIE Update interrupt enable 0 1 UIE Disabled Update interrupt disabled 0 Enabled Update interrupt enabled 1 SR SR status register 0x10 0x10 read-write 0x00000000 4 0x1 1-4 CC%sOF Capture/Compare %s overcapture flag 9 1 zeroToClear CC1OFR read NoOvercapture No overcapture has been detected 0 Overcapture The counter value has been captured in TIMx_CCRx register while CCxIF flag was already set 1 CC1OFW write Clear Clear flag 0 TIF Trigger interrupt flag 6 1 zeroToClear TIFR read NoTrigger No trigger event occurred 0 Trigger Trigger interrupt pending 1 TIFW write Clear Clear flag 0 4 0x1 1-4 CC%sIF Capture/compare %s interrupt flag 1 1 zeroToClear CC1IFR read NoMatch No campture/compare has been detected 0 Match If CC1 is an output: The content of the counter TIMx_CNT matches the content of the TIMx_CCR1 register. If CC1 is an input: The counter value has been captured in TIMx_CCR1 register. 1 CC1IFW write Clear Clear flag 0 UIF Update interrupt flag 0 1 zeroToClear UIFR read NoUpdateOccurred No update occurred 0 UpdatePending Update interrupt pending 1 UIFW write Clear Clear flag 0 EGR EGR event generation register 0x14 0x10 write-only 0x00000000 TG Trigger generation 6 1 TGW Trigger The TIF flag is set in TIMx_SR register. Related interrupt or DMA transfer can occur if enabled. 1 4 0x1 1-4 CC%sG Capture/compare %s generation 1 1 CC1GW Trigger If CC1 is an output: CC1IF flag is set, Corresponding interrupt or DMA request is sent if enabled. If CC1 is an input: The current value of the counter is captured in TIMx_CCR1 register. 1 UG Update generation 0 1 UG Update Re-initializes the timer counter and generates an update of the registers. 1 CCMR1_Output CCMR1_Output capture/compare mode register 1 (output mode) 0x18 0x20 read-write 0x00000000 2 0x8 1-2 OC%sM_3 Output compare %s mode, bit 3 16 1 OC1M_3 Normal Normal output compare mode (modes 0-7) 0 Extended Extended output compare mode (modes 7-15) 1 2 0x8 1-2 OC%sCE Output compare %s clear enable 7 1 OC1CE Disabled OCxRef is not affected by the ETRF signal 0 Enabled OCxRef is cleared as soon as a High level is detected on ETRF signal 1 2 0x8 1-2 OC%sM Output compare %s mode 4 3 OC1M Frozen The comparison between the output compare register TIMx_CCRy and the counter TIMx_CNT has no effect on the outputs / OpmMode1: Retriggerable OPM mode 1 - In up-counting mode, the channel is active until a trigger event is detected (on TRGI signal). In down-counting mode, the channel is inactive 0 ActiveOnMatch Set channel to active level on match. OCyREF signal is forced high when the counter matches the capture/compare register / OpmMode2: Inversely to OpmMode1 1 InactiveOnMatch Set channel to inactive level on match. OCyREF signal is forced low when the counter matches the capture/compare register / Reserved 2 Toggle OCyREF toggles when TIMx_CNT=TIMx_CCRy / Reserved 3 ForceInactive OCyREF is forced low / CombinedPwmMode1: OCyREF has the same behavior as in PWM mode 1. OCyREFC is the logical OR between OC1REF and OC2REF 4 ForceActive OCyREF is forced high / CombinedPwmMode2: OCyREF has the same behavior as in PWM mode 2. OCyREFC is the logical AND between OC1REF and OC2REF 5 PwmMode1 In upcounting, channel is active as long as TIMx_CNT<TIMx_CCRy else inactive. In downcounting, channel is inactive as long as TIMx_CNT>TIMx_CCRy else active / AsymmetricPwmMode1: OCyREF has the same behavior as in PWM mode 1. OCyREFC outputs OC1REF when the counter is counting up, OC2REF when it is counting down 6 PwmMode2 Inversely to PwmMode1 / AsymmetricPwmMode2: Inversely to AsymmetricPwmMode1 7 2 0x8 1-2 OC%sPE Output compare %s preload enable 3 1 OC1PE Disabled Preload register on CCRx disabled. New values written to CCRx are taken into account immediately 0 Enabled Preload register on CCRx enabled. Preload value is loaded into active register on each update event 1 2 0x8 1-2 OC%sFE Output compare %s fast enable 2 1 OC1FE Disabled Fast output disabled 0 Enabled Fast output enabled 1 2 0x8 1-2 CC%sS Capture/Compare %s selection 0 2 CC1S Output CCx channel is configured as output 0 CCMR1_Input CCMR1_Input capture/compare mode register 1 (input mode) CCMR1_Output 0x18 0x20 read-write 0x00000000 2 0x8 1-2 IC%sF Input capture %s filter 4 4 ICFilter NoFilter No filter, sampling is done at fDTS 0 FCK_INT_N2 fSAMPLING=fCK_INT, N=2 1 FCK_INT_N4 fSAMPLING=fCK_INT, N=4 2 FCK_INT_N8 fSAMPLING=fCK_INT, N=8 3 FDTS_Div2_N6 fSAMPLING=fDTS/2, N=6 4 FDTS_Div2_N8 fSAMPLING=fDTS/2, N=8 5 FDTS_Div4_N6 fSAMPLING=fDTS/4, N=6 6 FDTS_Div4_N8 fSAMPLING=fDTS/4, N=8 7 FDTS_Div8_N6 fSAMPLING=fDTS/8, N=6 8 FDTS_Div8_N8 fSAMPLING=fDTS/8, N=8 9 FDTS_Div16_N5 fSAMPLING=fDTS/16, N=5 10 FDTS_Div16_N6 fSAMPLING=fDTS/16, N=6 11 FDTS_Div16_N8 fSAMPLING=fDTS/16, N=8 12 FDTS_Div32_N5 fSAMPLING=fDTS/32, N=5 13 FDTS_Div32_N6 fSAMPLING=fDTS/32, N=6 14 FDTS_Div32_N8 fSAMPLING=fDTS/32, N=8 15 2 0x8 1-2 IC%sPSC Input capture %s prescaler 2 2 ICPrescaler NoPrescaler No prescaler, capture is done each time an edge is detected on the capture input 0 TwoEvents Capture is done once every 2 events 1 FourEvents Capture is done once every 4 events 2 EightEvents Capture is done once every 8 events 3 CC2S Capture/compare 2 selection 8 2 CC2S TI2 CC2 channel is configured as input, IC2 is mapped on TI2 1 TI1 CC2 channel is configured as input, IC2 is mapped on TI1 2 TRC CC2 channel is configured as input, IC2 is mapped on TRC 3 CC1S Capture/Compare 1 selection 0 2 CC1S TI1 CC1 channel is configured as input, IC1 is mapped on TI1 1 TI2 CC1 channel is configured as input, IC1 is mapped on TI2 2 TRC CC1 channel is configured as input, IC1 is mapped on TRC 3 CCMR2_Output CCMR2_Output capture/compare mode register 2 (output mode) 0x1C 0x20 read-write 0x00000000 2 0x8 3-4 OC%sM_3 Output compare %s mode, bit 3 16 1 2 0x8 3-4 OC%sCE Output compare %s clear enable 7 1 2 0x8 3-4 OC%sM Output compare %s mode 4 3 2 0x8 3-4 OC%sPE Output compare %s preload enable 3 1 2 0x8 3-4 OC%sFE Output compare %s fast enable 2 1 2 0x8 3-4 CC%sS Capture/Compare %s selection 0 2 CCMR2_Input CCMR2_Input capture/compare mode register 2 (input mode) CCMR2_Output 0x1C 0x20 read-write 0x00000000 2 0x8 3-4 IC%sF Input capture %s filter 4 4 2 0x8 3-4 IC%sPSC Input capture %s prescaler 2 2 CC4S Capture/Compare 4 selection 8 2 CC4S TI4 CC4 channel is configured as input, IC4 is mapped on TI4 1 TI3 CC4 channel is configured as input, IC4 is mapped on TI3 2 TRC CC4 channel is configured as input, IC4 is mapped on TRC 3 CC3S Capture/Compare 3 selection 0 2 CC3S TI3 CC3 channel is configured as input, IC3 is mapped on TI3 1 TI4 CC3 channel is configured as input, IC3 is mapped on TI4 2 TRC CC3 channel is configured as input, IC3 is mapped on TRC 3 CCER CCER capture/compare enable register 0x20 0x10 read-write 0x00000000 4 0x4 1-4 CC%sNP Capture/Compare %s output Polarity 3 1 4 0x4 1-4 CC%sP Capture/Compare %s output Polarity 1 1 CC1P RisingEdge Noninverted/rising edge 0 FallingEdge Inverted/falling edge 1 4 0x4 1-4 CC%sE Capture/Compare %s output enable 0 1 CC1E Disabled Capture disabled 0 Enabled Capture enabled 1 CNT CNT counter 0x24 0x20 read-write 0x00000000 CNT Counter value 0 32 CNT32 CNT32 32-bit counter register CNT 0x24 0x20 read-write 0x00000000 CNT counter value 0 32 read-write 0 4294967295 PSC PSC prescaler 0x28 0x10 read-write 0x00000000 PSC Prescaler value 0 16 0 65535 ARR ARR auto-reload register 0x2C 0x20 read-write 0xFFFFFFFF ARR Auto-reload value 0 32 0 4294967295 4 0x4 1-4 CCR%s CCR%s capture/compare register 0x34 0x20 read-write 0x00000000 CCR Capture/Compare value 0 32 0 4294967295 DCR DCR DMA control register 0x48 0x10 read-write 0x00000000 DBL DMA burst length 8 5 0 18 DBA DMA base address 0 5 0 31 DMAR DMAR DMA address for full transfer 0x4C 0x10 read-write 0x00000000 DMAB DMA register for burst accesses 0 16 OR1 OR1 TIM2 option register 1 0x50 0x20 read-write 0x00000000 ITR1_RMP Internal trigger 1 remap 0 1 ETR1_RMP External trigger remap 1 1 TI4_RMP Input Capture 4 remap 2 2 OR2 OR2 TIM2 option register 2 0x60 0x20 read-write 0x00000000 ETRSEL ETR source selection 14 3 TIM6 Basic-timers TIM 0x40001000 0x0 0x400 registers TIM2 TIM2 global interrupt 28 CR1 CR1 control register 1 0x0 0x10 read-write 0x00000000 UIFREMAP UIF status bit remapping 11 1 ARPE Auto-reload preload enable 7 1 ARPE Disabled TIMx_APRR register is not buffered 0 Enabled TIMx_APRR register is buffered 1 OPM One-pulse mode 3 1 OPM Disabled Counter is not stopped at update event 0 Enabled Counter stops counting at the next update event (clearing the CEN bit) 1 URS Update request source 2 1 URS AnyEvent Any of counter overflow/underflow, setting UG, or update through slave mode, generates an update interrupt or DMA request 0 CounterOnly Only counter overflow/underflow generates an update interrupt or DMA request 1 UDIS Update disable 1 1 UDIS Enabled Update event enabled 0 Disabled Update event disabled 1 CEN Counter enable 0 1 CEN Disabled Counter disabled 0 Enabled Counter enabled 1 CR2 CR2 control register 2 0x4 0x10 read-write 0x00000000 MMS Master mode selection 4 3 MMS Reset Use UG bit from TIMx_EGR register 0 Enable Use CNT bit from TIMx_CEN register 1 Update Use the update event 2 DIER DIER DMA/Interrupt enable register 0xC 0x10 read-write 0x00000000 UDE Update DMA request enable 8 1 UDE Disabled Update DMA request disabled 0 Enabled Update DMA request enabled 1 UIE Update interrupt enable 0 1 UIE Disabled Update interrupt disabled 0 Enabled Update interrupt enabled 1 SR SR status register 0x10 0x10 read-write 0x00000000 UIF Update interrupt flag 0 1 zeroToClear UIFR read NoUpdateOccurred No update occurred 0 UpdatePending Update interrupt pending 1 UIFW write Clear Clear flag 0 EGR EGR event generation register 0x14 0x20 write-only 0x00000000 UG Update generation 0 1 UG Update Re-initializes the timer counter and generates an update of the registers. 1 CNT CNT counter 0x24 0x20 0x00000000 UIFCPY UIF Copy 31 1 read-only CNT Low counter value 0 16 read-write 0 65535 CNT16 CNT16 16-bit counter register CNT 0x24 0x10 read-write 0x00000000 CNT counter value 0 16 read-write PSC PSC prescaler 0x28 0x10 read-write 0x00000000 PSC Prescaler value 0 16 0 65535 ARR ARR auto-reload register 0x2C 0x10 read-write 0x0000FFFF ARR Prescaler value 0 16 0 65535 TSC Touch sensing controller TSC 0x40024000 0x0 0x400 registers TIM6_DACUNDER TIM6 global and DAC1 underrun error interrupts 54 CR CR control register 0x0 0x20 read-write 0x00000000 CTPH Charge transfer pulse high 28 4 CTPL Charge transfer pulse low 24 4 SSD Spread spectrum deviation 17 7 SSE Spread spectrum enable 16 1 SSE Disabled Spread spectrum disabled 0 Enabled Spread spectrum enabled 1 SSPSC Spread spectrum prescaler 15 1 PGPSC pulse generator prescaler 12 3 MCV Max count value 5 3 IODEF I/O Default mode 4 1 IODEF PushPull I/Os are forced to output push-pull low 0 Floating I/Os are in input floating 1 SYNCPOL Synchronization pin polarity 3 1 SYNCPOL FallingEdge Falling edge only 0 RisingEdge Rising edge and high level 1 AM Acquisition mode 2 1 AM Normal Normal acquisition mode (acquisition starts as soon as START bit is set) 0 Synchronized Synchronized acquisition mode (acquisition starts if START bit is set and when the selected signal is detected on the SYNC input pin) 1 START Start a new acquisition 1 1 START NoStarted Acquisition not started 0 Started Start a new acquisition 1 TSCE Touch sensing controller enable 0 1 TSCE Disabled Touch sensing controller disabled 0 Enabled Touch sensing controller enabled 1 IER IER interrupt enable register 0x4 0x20 read-write 0x00000000 MCEIE Max count error interrupt enable 1 1 MCEIE Disabled Max count error interrupt disabled 0 Enabled Max count error interrupt enabled 1 EOAIE End of acquisition interrupt enable 0 1 EOAIE Disabled End of acquisition interrupt disabled 0 Enabled End of acquisition interrupt enabled 1 ICR ICR interrupt clear register 0x8 0x20 read-write 0x00000000 MCEIC Max count error interrupt clear 1 1 EOAIC End of acquisition interrupt clear 0 1 ISR ISR interrupt status register 0xC 0x20 read-write 0x00000000 MCEF Max count error flag 1 1 EOAF End of acquisition flag 0 1 IOHCR IOHCR I/O hysteresis control register 0x10 0x20 read-write 0xFFFFFFFF 7 0x4 1-7 G%s_IO1 G%s_IO1 0 1 G1_IO1 Disabled Gx_IOy Schmitt trigger hysteresis disabled 0 Enabled Gx_IOy Schmitt trigger hysteresis enabled 1 7 0x4 1-7 G%s_IO4 G%s_IO4 3 1 7 0x4 1-7 G%s_IO3 G%s_IO3 2 1 7 0x4 1-7 G%s_IO2 G%s_IO2 1 1 IOASCR IOASCR I/O analog switch control register 0x18 0x20 read-write 0x00000000 7 0x4 1-7 G%s_IO1 G%s_IO1 0 1 G1_IO1 Disabled Gx_IOy analog switch disabled (opened) 0 Enabled Gx_IOy analog switch enabled (closed) 1 7 0x4 1-7 G%s_IO4 G%s_IO4 3 1 7 0x4 1-7 G%s_IO3 G%s_IO3 2 1 7 0x4 1-7 G%s_IO2 G%s_IO2 1 1 IOSCR IOSCR I/O sampling control register 0x20 0x20 read-write 0x00000000 7 0x4 1-7 G%s_IO1 G%s_IO1 0 1 G1_IO1 Disabled Gx_IOy unused 0 Enabled Gx_IOy used as sampling capacitor 1 7 0x4 1-7 G%s_IO4 G%s_IO4 3 1 7 0x4 1-7 G%s_IO3 G%s_IO3 2 1 7 0x4 1-7 G%s_IO2 G%s_IO2 1 1 IOCCR IOCCR I/O channel control register 0x28 0x20 read-write 0x00000000 7 0x4 1-7 G%s_IO1 G%s_IO1 0 1 G1_IO1 Disabled Gx_IOy unused 0 Enabled Gx_IOy used as channel 1 7 0x4 1-7 G%s_IO4 G%s_IO4 3 1 7 0x4 1-7 G%s_IO3 G%s_IO3 2 1 7 0x4 1-7 G%s_IO2 G%s_IO2 1 1 IOGCSR IOGCSR I/O group control status register 0x30 0x20 0x00000000 7 0x1 1-7 G%sS Analog I/O group x status 16 1 read-only G1S Ongoing Acquisition on analog I/O group x is ongoing or not started 0 Complete Acquisition on analog I/O group x is complete 1 7 0x1 1-7 G%sE Analog I/O group x enable 0 1 read-write G1E Disabled Acquisition on analog I/O group x disabled 0 Enabled Acquisition on analog I/O group x enabled 1 8 0x4 1-8 IOG%sCR IOG%sCR I/O group x counter register 0x34 0x20 read-only 0x00000000 CNT Counter value 0 14 USART1 Universal synchronous asynchronous receiver transmitter USART 0x40013800 0x0 0x400 registers TSC TSC global interrupt 77 CR1 CR1 Control register 1 0x0 0x20 read-write 0x00000000 M1 Word length 28 1 M1 M0 Use M0 to set the data bits 0 Bit7 1 start bit, 7 data bits, n stop bits 1 EOBIE End of Block interrupt enable 27 1 EOBIE Disabled Interrupt is inhibited 0 Enabled A USART interrupt is generated when the EOBF flag is set in the ISR register 1 RTOIE Receiver timeout interrupt enable 26 1 RTOIE Disabled Interrupt is inhibited 0 Enabled An USART interrupt is generated when the RTOF bit is set in the ISR register 1 DEAT Driver Enable assertion time 21 5 0 31 DEDT Driver Enable de-assertion time 16 5 0 31 OVER8 Oversampling mode 15 1 OVER8 Oversampling16 Oversampling by 16 0 Oversampling8 Oversampling by 8 1 CMIE Character match interrupt enable 14 1 CMIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated when the CMF bit is set in the ISR register 1 MME Mute mode enable 13 1 MME Disabled Receiver in active mode permanently 0 Enabled Receiver can switch between mute mode and active mode 1 M0 Word length 12 1 M0 Bit8 1 start bit, 8 data bits, n stop bits 0 Bit9 1 start bit, 9 data bits, n stop bits 1 WAKE Receiver wakeup method 11 1 WAKE Idle Idle line 0 Address Address mask 1 PCE Parity control enable 10 1 PCE Disabled Parity control disabled 0 Enabled Parity control enabled 1 PS Parity selection 9 1 PS Even Even parity 0 Odd Odd parity 1 PEIE PE interrupt enable 8 1 PEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever PE=1 in the ISR register 1 TXEIE interrupt enable 7 1 TXEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever TXE=1 in the ISR register 1 TCIE Transmission complete interrupt enable 6 1 TCIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever TC=1 in the ISR register 1 RXNEIE RXNE interrupt enable 5 1 RXNEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever ORE=1 or RXNE=1 in the ISR register 1 IDLEIE IDLE interrupt enable 4 1 IDLEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever IDLE=1 in the ISR register 1 TE Transmitter enable 3 1 TE Disabled Transmitter is disabled 0 Enabled Transmitter is enabled 1 RE Receiver enable 2 1 RE Disabled Receiver is disabled 0 Enabled Receiver is enabled 1 UESM USART enable in Stop mode 1 1 UESM Disabled USART not able to wake up the MCU from Stop mode 0 Enabled USART able to wake up the MCU from Stop mode 1 UE USART enable 0 1 UE Disabled UART is disabled 0 Enabled UART is enabled 1 CR2 CR2 Control register 2 0x4 0x20 read-write 0x00000000 ADD Address of the USART node 24 8 0 255 RTOEN Receiver timeout enable 23 1 RTOEN Disabled Receiver timeout feature disabled 0 Enabled Receiver timeout feature enabled 1 ABRMOD Auto baud rate mode 21 2 ABRMOD Start Measurement of the start bit is used to detect the baud rate 0 Edge Falling edge to falling edge measurement 1 Frame7F 0x7F frame detection 2 Frame55 0x55 frame detection 3 ABREN Auto baud rate enable 20 1 ABREN Disabled Auto baud rate detection is disabled 0 Enabled Auto baud rate detection is enabled 1 MSBFIRST Most significant bit first 19 1 MSBFIRST LSB data is transmitted/received with data bit 0 first, following the start bit 0 MSB data is transmitted/received with MSB (bit 7/8/9) first, following the start bit 1 DATAINV Binary data inversion 18 1 DATAINV Positive Logical data from the data register are send/received in positive/direct logic 0 Negative Logical data from the data register are send/received in negative/inverse logic 1 TXINV TX pin active level inversion 17 1 TXINV Standard TX pin signal works using the standard logic levels 0 Inverted TX pin signal values are inverted 1 RXINV RX pin active level inversion 16 1 RXINV Standard RX pin signal works using the standard logic levels 0 Inverted RX pin signal values are inverted 1 SWAP Swap TX/RX pins 15 1 SWAP Standard TX/RX pins are used as defined in standard pinout 0 Swapped The TX and RX pins functions are swapped 1 LINEN LIN mode enable 14 1 LINEN Disabled LIN mode disabled 0 Enabled LIN mode enabled 1 STOP STOP bits 12 2 STOP Stop1 1 stop bit 0 Stop0p5 0.5 stop bit 1 Stop2 2 stop bit 2 Stop1p5 1.5 stop bit 3 CLKEN Clock enable 11 1 CLKEN Disabled CK pin disabled 0 Enabled CK pin enabled 1 CPOL Clock polarity 10 1 CPOL Low Steady low value on CK pin outside transmission window 0 High Steady high value on CK pin outside transmission window 1 CPHA Clock phase 9 1 CPHA First The first clock transition is the first data capture edge 0 Second The second clock transition is the first data capture edge 1 LBCL Last bit clock pulse 8 1 LBCL NotOutput The clock pulse of the last data bit is not output to the CK pin 0 Output The clock pulse of the last data bit is output to the CK pin 1 LBDIE LIN break detection interrupt enable 6 1 LBDIE Disabled Interrupt is inhibited 0 Enabled An interrupt is generated whenever LBDF=1 in the ISR register 1 LBDL LIN break detection length 5 1 LBDL Bit10 10-bit break detection 0 Bit11 11-bit break detection 1 ADDM7 7-bit Address Detection/4-bit Address Detection 4 1 ADDM7 Bit4 4-bit address detection 0 Bit7 7-bit address detection 1 CR3 CR3 Control register 3 0x8 0x20 read-write 0x00000000 WUFIE Wakeup from Stop mode interrupt enable 22 1 WUFIE Disabled Interrupt is inhibited 0 Enabled An USART interrupt is generated whenever WUF=1 in the ISR register 1 WUS Wakeup from Stop mode interrupt flag selection 20 2 WUS Address WUF active on address match 0 Start WuF active on Start bit detection 2 RXNE WUF active on RXNE 3 SCARCNT Smartcard auto-retry count 17 3 0 7 DEP Driver enable polarity selection 15 1 DEP High DE signal is active high 0 Low DE signal is active low 1 DEM Driver enable mode 14 1 DEM Disabled DE function is disabled 0 Enabled The DE signal is output on the RTS pin 1 DDRE DMA Disable on Reception Error 13 1 DDRE NotDisabled DMA is not disabled in case of reception error 0 Disabled DMA is disabled following a reception error 1 OVRDIS Overrun Disable 12 1 OVRDIS Enabled Overrun Error Flag, ORE, is set when received data is not read before receiving new data 0 Disabled Overrun functionality is disabled. If new data is received while the RXNE flag is still set the ORE flag is not set and the new received data overwrites the previous content of the RDR register 1 ONEBIT One sample bit method enable 11 1 ONEBIT Sample3 Three sample bit method 0 Sample1 One sample bit method 1 CTSIE CTS interrupt enable 10 1 CTSIE Disabled Interrupt is inhibited 0 Enabled An interrupt is generated whenever CTSIF=1 in the ISR register 1 CTSE CTS enable 9 1 CTSE Disabled CTS hardware flow control disabled 0 Enabled CTS mode enabled, data is only transmitted when the CTS input is asserted 1 RTSE RTS enable 8 1 RTSE Disabled RTS hardware flow control disabled 0 Enabled RTS output enabled, data is only requested when there is space in the receive buffer 1 DMAT DMA enable transmitter 7 1 DMAT Disabled DMA mode is disabled for transmission 0 Enabled DMA mode is enabled for transmission 1 DMAR DMA enable receiver 6 1 DMAR Disabled DMA mode is disabled for reception 0 Enabled DMA mode is enabled for reception 1 SCEN Smartcard mode enable 5 1 SCEN Disabled Smartcard Mode disabled 0 Enabled Smartcard Mode enabled 1 NACK Smartcard NACK enable 4 1 NACK Disabled NACK transmission in case of parity error is disabled 0 Enabled NACK transmission during parity error is enabled 1 HDSEL Half-duplex selection 3 1 HDSEL NotSelected Half duplex mode is not selected 0 Selected Half duplex mode is selected 1 IRLP Ir low-power 2 1 IRLP Normal Normal mode 0 LowPower Low-power mode 1 IREN Ir mode enable 1 1 IREN Disabled IrDA disabled 0 Enabled IrDA enabled 1 EIE Error interrupt enable 0 1 EIE Disabled Interrupt is inhibited 0 Enabled An interrupt is generated when FE=1 or ORE=1 or NF=1 in the ISR register 1 UCESM USART Clock Enable in Stop mode 23 1 UCESM Disabled USART clock is disabled in STOP mode 0 Enabled USART clock is enabled in STOP mode 1 TCBGTIE Transmission complete before guard time interrupt enable 24 1 TCBGTIE Disabled Interrupt is inhibited 0 Enabled An USART interrupt is generated whenever TCBGT=1 in the ISR register 1 BRR BRR Baud rate register 0xC 0x20 read-write 0x00000000 BRR DIV_Mantissa 0 16 0 65535 GTPR GTPR Guard time and prescaler register 0x10 0x20 read-write 0x00000000 GT Guard time value 8 8 0 255 PSC Prescaler value 0 8 0 255 RTOR RTOR Receiver timeout register 0x14 0x20 read-write 0x00000000 BLEN Block Length 24 8 0 255 RTO Receiver timeout value 0 24 0 16777215 RQR RQR Request register 0x18 0x20 write-only 0x00000000 TXFRQ Transmit data flush request 4 1 TXFRQ Discard Set the TXE flags. This allows to discard the transmit data 1 RXFRQ Receive data flush request 3 1 RXFRQ Discard clears the RXNE flag. This allows to discard the received data without reading it, and avoid an overrun condition 1 MMRQ Mute mode request 2 1 MMRQ Mute Puts the USART in mute mode and sets the RWU flag 1 SBKRQ Send break request 1 1 SBKRQ Break sets the SBKF flag and request to send a BREAK on the line, as soon as the transmit machine is available 1 ABRRQ Auto baud rate request 0 1 ABRRQ Request resets the ABRF flag in the USART_ISR and request an automatic baud rate measurement on the next received data frame 1 ISR ISR Interrupt & status register 0x1C 0x20 read-only 0x020000C0 REACK REACK 22 1 TEACK TEACK 21 1 WUF WUF 20 1 RWU RWU 19 1 RWU Active Receiver in Active mode 0 Mute Receiver in Mute mode 1 SBKF SBKF 18 1 SBKF NoBreak No break character transmitted 0 Break Break character transmitted 1 CMF CMF 17 1 CMF NoMatch No Character match detected 0 Match Character match detected 1 BUSY BUSY 16 1 BUSY Idle USART is idle (no reception) 0 Busy Reception on going 1 ABRF ABRF 15 1 ABRE ABRE 14 1 EOBF EOBF 12 1 EOBF NotReached End of Block not reached 0 Reached End of Block (number of characters) reached 1 RTOF RTOF 11 1 RTOF NotReached Timeout value not reached 0 Reached Timeout value reached without any data reception 1 CTS CTS 10 1 CTS Set CTS line set 0 Reset CTS line reset 1 CTSIF CTSIF 9 1 CTSIF NotChanged No change occurred on the CTS status line 0 Changed A change occurred on the CTS status line 1 LBDF LBDF 8 1 LBDF NotDetected LIN break not detected 0 Detected LIN break detected 1 TXE TXE 7 1 TXE Full Transmit FIFO is full 0 NotFull Transmit FIFO is not full 1 TC TC 6 1 TC TxNotComplete Transmission is not complete 0 TxComplete Transmission is complete 1 RXNE RXNE 5 1 RXNE NoData Data is not received 0 DataReady Received data is ready to be read 1 IDLE IDLE 4 1 IDLE NoIdle No Idle Line is detected 0 Idle Idle Line is detected 1 ORE ORE 3 1 ORE NoOverrun No Overrun error 0 Overrun Overrun error is detected 1 NF NF 2 1 NF NoNoise No noise is detected 0 Noise Noise is detected 1 FE FE 1 1 FE NoError No Framing error is detected 0 Error Framing error or break character is detected 1 PE PE 0 1 PE NoError No parity error 0 Error Parity error 1 TCBGT Transmission complete before guard time completion 25 1 TCBGT NotCompleted Transmission not completed 0 Completed Transmission has completed 1 ICR ICR Interrupt flag clear register 0x20 0x20 write-only 0x00000000 WUCF Wakeup from Stop mode clear flag 20 1 oneToClear WUCF Clear Clears the WUF flag in the ISR register 1 CMCF Character match clear flag 17 1 oneToClear CMCF Clear Clears the CMF flag in the ISR register 1 EOBCF End of block clear flag 12 1 oneToClear EOBCF Clear Clears the EOBF flag in the ISR register 1 RTOCF Receiver timeout clear flag 11 1 oneToClear RTOCF Clear Clears the RTOF flag in the ISR register 1 CTSCF CTS clear flag 9 1 oneToClear CTSCF Clear Clears the CTSIF flag in the ISR register 1 LBDCF LIN break detection clear flag 8 1 oneToClear LBDCF Clear Clears the LBDF flag in the ISR register 1 TCCF Transmission complete clear flag 6 1 oneToClear TCCF Clear Clears the TC flag in the ISR register 1 IDLECF Idle line detected clear flag 4 1 oneToClear IDLECF Clear Clears the IDLE flag in the ISR register 1 ORECF Overrun error clear flag 3 1 oneToClear ORECF Clear Clears the ORE flag in the ISR register 1 NCF Noise detected clear flag 2 1 oneToClear NCF Clear Clears the NF flag in the ISR register 1 FECF Framing error clear flag 1 1 oneToClear FECF Clear Clears the FE flag in the ISR register 1 PECF Parity error clear flag 0 1 oneToClear PECF Clear Clears the PE flag in the ISR register 1 RDR RDR Receive data register 0x24 0x20 read-only 0x00000000 RDR Receive data value 0 9 0 511 TDR TDR Transmit data register 0x28 0x20 read-write 0x00000000 TDR Transmit data value 0 9 0 511 WWDG System window watchdog WWDG 0x40002C00 0x0 0x400 registers USART1 USART1 global interrupt 37 CR CR Control register 0x0 0x10 read-write 0x0000007F WDGA Activation bit 7 1 WDGA Disabled Watchdog disabled 0 Enabled Watchdog enabled 1 T 7-bit counter (MSB to LSB) 0 7 0 127 CFR CFR Configuration register 0x4 0x10 read-write 0x0000007F EWI Early wakeup interrupt 9 1 EWIW write Enable interrupt occurs whenever the counter reaches the value 0x40 1 WDGTB Timer base 7 2 WDGTB Div1 Counter clock (PCLK1 div 4096) div 1 0 Div2 Counter clock (PCLK1 div 4096) div 2 1 Div4 Counter clock (PCLK1 div 4096) div 4 2 Div8 Counter clock (PCLK1 div 4096) div 8 3 W 7-bit window value 0 7 0 127 SR SR Status register 0x8 0x10 read-write 0x00000000 EWIF Early wakeup interrupt flag 0 1 zeroToClear EWIFR read Finished The EWI Interrupt Service Routine has been serviced 0 Pending The EWI Interrupt Service Routine has been triggered 1 EWIFW write Finished The EWI Interrupt Service Routine has been serviced 0 QUADSPI QuadSPI interface QUADSPI 0xA0001000 0x0 0x400 registers USART2 USART2 global interrupt 38 CR CR control register 0x0 0x20 read-write 0x00000000 PRESCALER Clock prescaler 24 8 0 255 PMM Polling match mode 23 1 PMM AndMatch AND match mode. SMF is set if all the unmasked bits received from the Flash memory match the corresponding bits in the match register. 0 OrMatch OR match mode. SMF is set if any one of the unmasked bits received from the Flash memory matches its corresponding bit in the match register. 1 APMS Automatic poll mode stop 22 1 APMS NotStopOnMatch Automatic polling mode is stopped only by abort or by disabling the QUADSPI. 0 StopOnMatch Automatic polling mode stops as soon as there is a match. 1 TEIE Transfer error interrupt enable 16 1 TEIE Disabled Interrupt disable 0 Enabled Interrupt enabled 1 TOIE TimeOut interrupt enable 20 1 SMIE Status match interrupt enable 19 1 FTIE FIFO threshold interrupt enable 18 1 TCIE Transfer complete interrupt enable 17 1 FTHRES FIFO threshold level 8 4 SSHIFT Sample shift 4 1 SSHIFT NoShift No shift 0 OneHalfCycleShift 1/2 cycle shift 1 TCEN Timeout counter enable 3 1 TCEN Disabled Timeout counter is disabled, and thus the chip select (nCS) remains active indefinitely after an access in memory-mapped mode. 0 Enabled Timeout counter is enabled, and thus the chip select is released in memory-mapped mode after TIMEOUT[15:0] cycles of Flash memory inactivity. 1 DMAEN DMA enable 2 1 DMAEN Disabled DMA is disabled for indirect mode 0 Enabled DMA is enabled for indirect mode 1 ABORT Abort request 1 1 ABORT NoAbortRequested No abort requested 0 AbortRequested Abort requested 1 EN Enable 0 1 EN Disabled QUADSPI is disabled 0 Enabled QUADSPI is enabled 1 FSEL Flash memory selection 7 1 FSEL SelectFlash1 FLASH 1 selected 0 SelectFlash2 FLASH 2 selected 1 DFM Dual-flash mode 6 1 DFM Disabled Dual-flash mode disabled 0 Enabled Dual-flash mode enabled 1 DCR DCR device configuration register 0x4 0x20 read-write 0x00000000 FSIZE FLASH memory size 16 5 0 31 CSHT Chip select high time 8 3 0 7 CKMODE Mode 0 / mode 3 0 1 CKMODE Mode0 CLK must stay low while nCS is high (chip select released). This is referred to as mode 0. 0 Mode3 CLK must stay high while nCS is high (chip select released). This is referred to as mode 3. 1 SR SR status register 0x8 0x20 read-only 0x00000000 FLEVEL FIFO level 8 5 0 31 BUSY Busy 5 1 BUSY NotBusy 0 Busy 1 TOF Timeout flag 4 1 TOF NotTimeout 0 Timeout 1 SMF Status match flag 3 1 SMF NotMatched 0 Matched 1 FTF FIFO threshold flag 2 1 FTF NotReached 0 Reached 1 TCF Transfer complete flag 1 1 TCF NotComplete 0 Complete 1 TEF Transfer error flag 0 1 TEF NoError 0 Error 1 FCR FCR flag clear register 0xC 0x20 read-write 0x00000000 CTOF Clear timeout flag 4 1 CTOF Clear clears the TOF flag in the QUADSPI_SR register 1 CSMF Clear status match flag 3 1 CSMF Clear clears the SMF flag in the QUADSPI_SR register 1 CTCF Clear transfer complete flag 1 1 CTCF Clear clears the TCF flag in the QUADSPI_SR register 1 CTEF Clear transfer error flag 0 1 CTEF Clear clears the TEF flag in the QUADSPI_SR register 1 DLR DLR data length register 0x10 0x20 read-write 0x00000000 DL Data length 0 32 0 4294967295 CCR CCR communication configuration register 0x14 0x20 read-write 0x00000000 DDRM Double data rate mode 31 1 DDRM Disabled DDR Mode disabled 0 Enabled DDR Mode enabled 1 SIOO Send instruction only once mode 28 1 SIOO SendEveryTransaction Send instruction on every transaction 0 SendFirstCommand Send instruction only for the first command 1 FMODE Functional mode 26 2 FMODE IndirectWrite Indirect write mode 0 IndirectRead Indirect read mode 1 AutomaticPolling Automatic polling mode 2 MemoryMapped Memory-mapped mode 3 DMODE Data mode 24 2 DMODE NoData No data 0 SingleLine Data on a single line 1 TwoLines Data on two lines 2 FourLines Data on four lines 3 DCYC Number of dummy cycles 18 5 0 31 ABSIZE Alternate bytes size 16 2 ABSIZE Bit8 8-bit alternate byte 0 Bit16 16-bit alternate bytes 1 Bit24 24-bit alternate bytes 2 Bit32 32-bit alternate bytes 3 ABMODE Alternate bytes mode 14 2 ABMODE NoAlternateBytes No alternate bytes 0 SingleLine Alternate bytes on a single line 1 TwoLines Alternate bytes on two lines 2 FourLines Alternate bytes on four lines 3 ADSIZE Address size 12 2 ADSIZE Bit8 8-bit address 0 Bit16 16-bit address 1 Bit24 24-bit address 2 Bit32 32-bit address 3 ADMODE Address mode 10 2 ADMODE NoAddress No address 0 SingleLine Address on a single line 1 TwoLines Address on two lines 2 FourLines Address on four lines 3 IMODE Instruction mode 8 2 IMODE NoInstruction No instruction 0 SingleLine Instruction on a single line 1 TwoLines Instruction on two lines 2 FourLines Instruction on four lines 3 INSTRUCTION Instruction 0 8 0 255 DHHC DDR hold 30 1 DHHC NoDelay Delay the data output using analog delay 0 Delayed Delay the data output by 1/4 of a QUADSPI output clock cycle. 1 AR AR address register 0x18 0x20 read-write 0x00000000 ADDRESS Address 0 32 0 4294967295 ABR ABR ABR 0x1C 0x20 read-write 0x00000000 ALTERNATE ALTERNATE 0 32 0 4294967295 DR DR Data register: full word (32 bit) access 0x20 0x20 read-write 0x00000000 DATA Data 0 32 0 4294967295 DR16 Data register: half word (16 bit) access DR 0x20 0x10 DATA Data 0 16 0 65535 DR8 Data register: one byte (8 bit) access DR 0x20 0x8 DATA Data 0 8 0 255 PSMKR PSMKR polling status mask register 0x24 0x20 read-write 0x00000000 MASK Status mask 0 32 0 4294967295 PSMAR PSMAR polling status match register 0x28 0x20 read-write 0x00000000 MATCH Status match 0 32 0 4294967295 PIR PIR polling interval register 0x2C 0x20 read-write 0x00000000 INTERVAL Polling interval 0 16 0 65535 LPTR LPTR low-power timeout register 0x30 0x20 read-write 0x00000000 TIMEOUT Timeout period 0 16 0 65535 GPIOA General-purpose I/Os GPIO 0x48000000 0x0 0x400 registers USART3 USART3 global interrupt 39 MODER MODER GPIO port mode register 0x0 0x20 read-write 0xABFFFFFF 16 0x2 0-15 MODER%s Port x configuration pin %s 0 2 Mode Input Input mode (reset state) 0 Output General purpose output mode 1 Alternate Alternate function mode 2 Analog Analog mode 3 OTYPER OTYPER GPIO port output type register 0x4 0x20 read-write 0x00000000 16 0x1 0-15 OT%s Port x configuration pin %s 0 1 OutputType PushPull Output push-pull (reset state) 0 OpenDrain Output open-drain 1 OSPEEDR OSPEEDR GPIO port output speed register 0x8 0x20 read-write 0x0C000000 16 0x2 0-15 OSPEEDR%s Port x configuration pin %s 0 2 OutputSpeed LowSpeed Low speed 0 MediumSpeed Medium speed 1 HighSpeed High speed 2 VeryHighSpeed Very high speed 3 PUPDR PUPDR GPIO port pull-up/pull-down register 0xC 0x20 read-write 0x64000000 16 0x2 0-15 PUPDR%s Port x configuration pin %s 0 2 Pull Floating No pull-up, pull-down 0 PullUp Pull-up 1 PullDown Pull-down 2 IDR IDR GPIO port input data register 0x10 0x20 read-only 0x00000000 16 0x1 0-15 IDR%s Port input data pin %s 0 1 InputData Low Input is logic low 0 High Input is logic high 1 ODR ODR GPIO port output data register 0x14 0x20 read-write 0x00000000 16 0x1 0-15 ODR%s Port output data pin %s 0 1 OutputData Low Set output to logic low 0 High Set output to logic high 1 BSRR BSRR GPIO port bit set/reset register 0x18 0x20 write-only 0x00000000 16 0x1 0-15 BR%s Port x reset pin %s 16 1 BitReset Reset Resets the corresponding ODRx bit 1 16 0x1 0-15 BS%s Port x set pin %s 0 1 BitSet Set Sets the corresponding ODRx bit 1 LCKR LCKR GPIO port configuration lock register 0x1C 0x20 read-write 0x00000000 LCKK Port x lock bit y (y= 0..15) 16 1 LockKey NotActive Port configuration lock key not active 0 Active Port configuration lock key active 1 16 0x1 0-15 LCK%s Port x lock pin %s 0 1 Lock Unlocked Port configuration not locked 0 Locked Port configuration locked 1 AFRL AFRL GPIO alternate function low register 0x20 0x20 read-write 0x00000000 8 0x4 L0,L1,L2,L3,L4,L5,L6,L7 AFR%s Alternate function selection for port x bit y (y = 0..7) 0 4 AlternateFunction AF0 AF0 0 AF1 AF1 1 AF2 AF2 2 AF3 AF3 3 AF4 AF4 4 AF5 AF5 5 AF6 AF6 6 AF7 AF7 7 AF8 AF8 8 AF9 AF9 9 AF10 AF10 10 AF11 AF11 11 AF12 AF12 12 AF13 AF13 13 AF14 AF14 14 AF15 AF15 15 AFRH AFRH GPIO alternate function high register 0x24 0x20 read-write 0x00000000 8 0x4 H8,H9,H10,H11,H12,H13,H14,H15 AFR%s Alternate function selection for port x bit y (y = 8..15) 0 4 BRR BRR GPIO port bit reset register 0x28 0x20 read-write 0x00000000 16 0x1 0-15 BR%s Port x reset pin %s 0 1 BitReset write NoAction No action on the corresponding ODx bit 0 Reset Reset the ODx bit 1 GPIOB General-purpose I/Os GPIO 0x48000400 0x0 0x400 registers WWDG Window Watchdog interrupt 0 USB USB event interrupt through EXTI line 17 67 MODER MODER GPIO port mode register 0x0 0x20 read-write 0xFFFFFEBF 16 0x2 0-15 MODER%s Port x configuration pin %s 0 2 OTYPER OTYPER GPIO port output type register 0x4 OSPEEDR OSPEEDR GPIO port output speed register 0x8 0x20 read-write 0x00000000 16 0x2 0-15 OSPEEDR%s Port x configuration pin %s 0 2 PUPDR PUPDR GPIO port pull-up/pull-down register 0xC 0x20 read-write 0x00000100 16 0x2 0-15 PUPDR%s Port x configuration pin %s 0 2 IDR IDR GPIO port input data register 0x10 ODR ODR GPIO port output data register 0x14 BSRR BSRR GPIO port bit set/reset register 0x18 LCKR LCKR GPIO port configuration lock register 0x1C AFRL AFRL GPIO alternate function low register 0x20 AFRH AFRH GPIO alternate function high register 0x24 BRR BRR GPIO port bit reset register 0x28 GPIOC General-purpose I/Os GPIO 0x48000800 0x0 0x400 registers QUADSPI QUADSPI global interrupt 71 MODER MODER GPIO port mode register 0x0 0x20 read-write 0xFFFFFFFF 16 0x2 0-15 MODER%s Port x configuration pin %s 0 2 OTYPER OTYPER GPIO port output type register 0x4 OSPEEDR OSPEEDR GPIO port output speed register 0x8 0x20 read-write 0x00000000 16 0x2 0-15 OSPEEDR%s Port x configuration pin %s 0 2 PUPDR PUPDR GPIO port pull-up/pull-down register 0xC 0x20 read-write 0x00000000 16 0x2 0-15 PUPDR%s Port x configuration pin %s 0 2 IDR IDR GPIO port input data register 0x10 ODR ODR GPIO port output data register 0x14 BSRR BSRR GPIO port bit set/reset register 0x18 LCKR LCKR GPIO port configuration lock register 0x1C AFRL AFRL GPIO alternate function low register 0x20 AFRH AFRH GPIO alternate function high register 0x24 BRR BRR GPIO port bit reset register 0x28 GPIOD 0x48000C00 GPIOH General-purpose I/Os GPIO 0x48001C00 0x0 0x400 registers MODER MODER GPIO port mode register 0x0 0x20 read-write 0x0000000F 16 0x2 0-15 MODER%s Port x configuration pin %s 0 2 OTYPER OTYPER GPIO port output type register 0x4 OSPEEDR OSPEEDR GPIO port output speed register 0x8 0x20 read-write 0x00000000 16 0x2 0-15 OSPEEDR%s Port x configuration pin %s 0 2 PUPDR PUPDR GPIO port pull-up/pull-down register 0xC 0x20 read-write 0x00000000 16 0x2 0-15 PUPDR%s Port x configuration pin %s 0 2 IDR IDR GPIO port input data register 0x10 ODR ODR GPIO port output data register 0x14 BSRR BSRR GPIO port bit set/reset register 0x18 LCKR LCKR GPIO port configuration lock register 0x1C AFRL AFRL GPIO alternate function low register 0x20 AFRH AFRH GPIO alternate function high register 0x24 BRR BRR GPIO port bit reset register 0x28 RCC Reset and clock control RCC 0x40021000 0x0 0x400 registers RCC RCC global interrupt 5 CR CR Clock control register 0x0 0x20 0x00000000 PLLRDY Main PLL clock ready flag 25 1 read-only PLLON Main PLL enable 24 1 read-write CSSON Clock security system enable 19 1 write-only HSEBYP HSE crystal oscillator bypass 18 1 read-write HSERDY HSE clock ready flag 17 1 read-only HSEON HSE clock enable 16 1 read-write HSIASFS HSI automatic start from Stop 11 1 read-write HSIRDY HSI clock ready flag 10 1 read-only HSIKERON HSI always enable for peripheral kernels 9 1 read-write HSION HSI clock enable 8 1 read-write MSIRANGE MSI clock ranges 4 4 read-write MSIRANGE Range100K range 0 around 100 kHz 0 Range200K range 1 around 200 kHz 1 Range400K range 2 around 400 kHz 2 Range800K range 3 around 800 kHz 3 Range1M range 4 around 1 MHz 4 Range2M range 5 around 2 MHz 5 Range4M range 6 around 4 MHz 6 Range8M range 7 around 8 MHz 7 Range16M range 8 around 16 MHz 8 Range24M range 9 around 24 MHz 9 Range32M range 10 around 32 MHz 10 Range48M range 11 around 48 MHz 11 MSIRGSEL MSI clock range selection 3 1 write-only MSIPLLEN MSI clock PLL enable 2 1 read-write MSIRDY MSI clock ready flag 1 1 read-only MSION MSI clock enable 0 1 read-write ICSCR ICSCR Internal clock sources calibration register 0x4 0x20 0x00000000 HSITRIM HSI clock trimming 24 5 read-write HSICAL HSI clock calibration 16 8 read-only MSITRIM MSI clock trimming 8 8 read-write MSICAL MSI clock calibration 0 8 read-only CFGR CFGR Clock configuration register 0x8 0x20 0x00000000 MCOPRE Microcontroller clock output prescaler 28 3 read-only MCOSEL Microcontroller clock output 24 3 read-write STOPWUCK Wakeup from Stop and CSS backup clock selection 15 1 read-write PPRE2 APB high-speed prescaler (APB2) 11 3 read-write PPRE1 PB low-speed prescaler (APB1) 8 3 read-write HPRE AHB prescaler 4 4 read-write SWS System clock switch status 2 2 read-only SW System clock switch 0 2 read-write PLLCFGR PLLCFGR PLL configuration register 0xC 0x20 read-write 0x00001000 PLLR Main PLL division factor for PLLCLK (system clock) 25 2 PLLREN Main PLL PLLCLK output enable 24 1 PLLQ Main PLL division factor for PLLUSB1CLK(48 MHz clock) 21 2 PLLQEN Main PLL PLLUSB1CLK output enable 20 1 PLLP Main PLL division factor for PLLSAI3CLK (SAI1 and SAI2 clock) 17 1 PLLPEN Main PLL PLLSAI3CLK output enable 16 1 PLLN Main PLL multiplication factor for VCO 8 7 PLLM Division factor for the main PLL and audio PLL (PLLSAI1 and PLLSAI2) input clock 4 3 PLLSRC Main PLL, PLLSAI1 and PLLSAI2 entry clock source 0 2 PLLPDIV Main PLL division factor for PLLSAI2CLK 27 5 CIER CIER Clock interrupt enable register 0x18 0x20 read-write 0x00000000 LSECSSIE LSE clock security system interrupt enable 9 1 PLLRDYIE PLL ready interrupt enable 5 1 HSERDYIE HSE ready interrupt enable 4 1 HSIRDYIE HSI ready interrupt enable 3 1 MSIRDYIE MSI ready interrupt enable 2 1 LSERDYIE LSE ready interrupt enable 1 1 LSIRDYIE LSI ready interrupt enable 0 1 HSI48RDYIE HSI48 ready interrupt enable 10 1 CIFR CIFR Clock interrupt flag register 0x1C 0x20 read-only 0x00000000 LSECSSF LSE Clock security system interrupt flag 9 1 CSSF Clock security system interrupt flag 8 1 PLLRDYF PLL ready interrupt flag 5 1 HSERDYF HSE ready interrupt flag 4 1 HSIRDYF HSI ready interrupt flag 3 1 MSIRDYF MSI ready interrupt flag 2 1 LSERDYF LSE ready interrupt flag 1 1 LSIRDYF LSI ready interrupt flag 0 1 HSI48RDYF HSI48 ready interrupt flag 10 1 CICR CICR Clock interrupt clear register 0x20 0x20 write-only 0x00000000 LSECSSC LSE Clock security system interrupt clear 9 1 CSSC Clock security system interrupt clear 8 1 PLLRDYC PLL ready interrupt clear 5 1 HSERDYC HSE ready interrupt clear 4 1 HSIRDYC HSI ready interrupt clear 3 1 MSIRDYC MSI ready interrupt clear 2 1 LSERDYC LSE ready interrupt clear 1 1 LSIRDYC LSI ready interrupt clear 0 1 HSI48RDYC HSI48 oscillator ready interrupt clear 10 1 AHB1RSTR AHB1RSTR AHB1 peripheral reset register 0x28 0x20 read-write 0x00000000 TSCRST Touch Sensing Controller reset 16 1 CRCRST CRC reset 12 1 FLASHRST Flash memory interface reset 8 1 DMA2RST DMA2 reset 1 1 DMA1RST DMA1 reset 0 1 AHB2RSTR AHB2RSTR AHB2 peripheral reset register 0x2C 0x20 read-write 0x00000000 RNGRST Random number generator reset 18 1 ADCRST ADC reset 13 1 GPIOHRST IO port H reset 7 1 GPIOCRST IO port C reset 2 1 GPIOBRST IO port B reset 1 1 GPIOARST IO port A reset 0 1 AHB3RSTR AHB3RSTR AHB3 peripheral reset register 0x30 0x20 read-write 0x00000000 QSPIRST Quad SPI memory interface reset 8 1 APB1RSTR1 APB1RSTR1 APB1 peripheral reset register 1 0x38 0x20 read-write 0x00000000 LPTIM1RST Low Power Timer 1 reset 31 1 OPAMPRST OPAMP interface reset 30 1 PWRRST Power interface reset 28 1 USBFSRST USB FS reset 26 1 I2C3RST I2C3 reset 23 1 I2C2RST I2C2 reset 22 1 I2C1RST I2C1 reset 21 1 USART3RST USART3 reset 18 1 USART2RST USART2 reset 17 1 SPI2RST SPI2 reset 14 1 TIM2RST TIM2 timer reset 0 1 TIM6RST TIM6 timer reset 4 1 CRSRST CRS reset 24 1 TIM3RST TIM3 timer reset 1 1 read-write APB1RSTR2 APB1RSTR2 APB1 peripheral reset register 2 0x3C 0x20 read-write 0x00000000 LPTIM2RST Low-power timer 2 reset 5 1 LPUART1RST Low-power UART 1 reset 0 1 APB2RSTR APB2RSTR APB2 peripheral reset register 0x40 0x20 read-write 0x00000000 TIM16RST TIM16 timer reset 17 1 TIM15RST TIM15 timer reset 16 1 USART1RST USART1 reset 14 1 SPI1RST SPI1 reset 12 1 TIM1RST TIM1 timer reset 11 1 SYSCFGRST System configuration (SYSCFG) reset 0 1 AHB1ENR AHB1ENR AHB1 peripheral clock enable register 0x48 0x20 read-write 0x00000100 TSCEN Touch Sensing Controller clock enable 16 1 CRCEN CRC clock enable 12 1 FLASHEN Flash memory interface clock enable 8 1 DMA2EN DMA2 clock enable 1 1 DMA1EN DMA1 clock enable 0 1 AHB2ENR AHB2ENR AHB2 peripheral clock enable register 0x4C 0x20 read-write 0x00000000 RNGEN Random Number Generator clock enable 18 1 ADCEN ADC clock enable 13 1 ADCEN Disabled ADC clock disabled 0 Enabled ADC clock enabled 1 GPIOHEN IO port H clock enable 7 1 GPIOCEN IO port C clock enable 2 1 GPIOBEN IO port B clock enable 1 1 GPIOAEN IO port A clock enable 0 1 AHB3ENR AHB3ENR AHB3 peripheral clock enable register 0x50 0x20 read-write 0x00000000 QSPIEN QSPIEN 8 1 APB1ENR1 APB1ENR1 APB1ENR1 0x58 0x20 read-write 0x00000400 TIM2EN TIM2 timer clock enable 0 1 RTCAPBEN RTC APB clock enable 10 1 WWDGEN Window watchdog clock enable 11 1 USART2EN USART2 clock enable 17 1 USART3EN USART3 clock enable 18 1 I2C1EN I2C1 clock enable 21 1 I2C1EN Disabled I2C1 clock disabled 0 Enabled I2C1 clock enabled 1 I2C2EN I2C2 clock enable 22 1 I2C2EN Disabled I2C2 clock disabled 0 Enabled I2C2 clock enabled 1 I2C3EN I2C3 clock enable 23 1 I2C3EN Disabled I2C3 clock disabled 0 Enabled I2C3 clock enabled 1 CRSEN CRS clock enable 24 1 USBFSEN USB FS clock enable 26 1 PWREN Power interface clock enable 28 1 OPAMPEN OPAMP interface clock enable 30 1 LPTIM1EN Low power timer 1 clock enable 31 1 LPTIM1EN Disabled LPTIM1 clock disabled 0 Enabled LPTIM1 clock enabled 1 TIM6EN TIM6 timer clock enable 4 1 SPI2EN SPI2 clock enable 14 1 APB1ENR2 APB1ENR2 APB1 peripheral clock enable register 2 0x5C 0x20 read-write 0x00000000 LPTIM2EN LPTIM2EN 5 1 LPTIM2EN Disabled LPTIM2 clock disabled 0 Enabled LPTIM2 clock enabled 1 LPUART1EN Low power UART 1 clock enable 0 1 LPUART1EN Disabled LPUART1 clock disabled 0 Enabled LPUART1 clock enabled 1 APB2ENR APB2ENR APB2ENR 0x60 0x20 read-write 0x00000000 TIM16EN TIM16 timer clock enable 17 1 TIM15EN TIM15 timer clock enable 16 1 USART1EN USART1clock enable 14 1 USART1EN Disabled USART1 clock disabled 0 Enabled USART1 clock enabled 1 SPI1EN SPI1 clock enable 12 1 TIM1EN TIM1 timer clock enable 11 1 FIREWALLEN Firewall clock enable 7 1 SYSCFGEN SYSCFG clock enable 0 1 AHB1SMENR AHB1SMENR AHB1 peripheral clocks enable in Sleep and Stop modes register 0x68 0x20 read-write 0x00011303 TSCSMEN Touch Sensing Controller clocks enable during Sleep and Stop modes 16 1 CRCSMEN CRCSMEN 12 1 SRAM1SMEN SRAM1 interface clocks enable during Sleep and Stop modes 9 1 FLASHSMEN Flash memory interface clocks enable during Sleep and Stop modes 8 1 DMA2SMEN DMA2 clocks enable during Sleep and Stop modes 1 1 DMA1SMEN DMA1 clocks enable during Sleep and Stop modes 0 1 AHB2SMENR AHB2SMENR AHB2 peripheral clocks enable in Sleep and Stop modes register 0x6C 0x20 read-write 0x0005228F RNGSMEN Random Number Generator clocks enable during Sleep and Stop modes 18 1 ADCFSSMEN ADC clocks enable during Sleep and Stop modes 13 1 SRAM2SMEN SRAM2 interface clocks enable during Sleep and Stop modes 9 1 GPIOHSMEN IO port H clocks enable during Sleep and Stop modes 7 1 GPIODSMEN IO port D clocks enable during Sleep and Stop modes 3 1 GPIOCSMEN IO port C clocks enable during Sleep and Stop modes 2 1 GPIOBSMEN IO port B clocks enable during Sleep and Stop modes 1 1 GPIOASMEN IO port A clocks enable during Sleep and Stop modes 0 1 AHB3SMENR AHB3SMENR AHB3 peripheral clocks enable in Sleep and Stop modes register 0x70 0x20 read-write 0x00000100 QSPISMEN QSPISMEN 8 1 APB1SMENR1 APB1SMENR1 APB1SMENR1 0x78 0x20 read-write 0xD5E64C11 LPTIM1SMEN Low power timer 1 clocks enable during Sleep and Stop modes 31 1 OPAMPSMEN OPAMP interface clocks enable during Sleep and Stop modes 30 1 PWRSMEN Power interface clocks enable during Sleep and Stop modes 28 1 I2C3SMEN I2C3 clocks enable during Sleep and Stop modes 23 1 I2C2SMEN I2C2 clocks enable during Sleep and Stop modes 22 1 I2C1SMEN I2C1 clocks enable during Sleep and Stop modes 21 1 USART3SMEN USART3 clocks enable during Sleep and Stop modes 18 1 USART2SMEN USART2 clocks enable during Sleep and Stop modes 17 1 SPI2SMEN SPI2 clocks enable during Sleep and Stop modes 14 1 WWDGSMEN Window watchdog clocks enable during Sleep and Stop modes 11 1 TIM6SMEN TIM6 timer clocks enable during Sleep and Stop modes 4 1 TIM2SMEN TIM2 timer clocks enable during Sleep and Stop modes 0 1 RTCAPBSMEN RTC APB clock enable during Sleep and Stop modes 10 1 USBFSSMEN USB FS clock enable during Sleep and Stop modes 26 1 CRSSMEN CRS clock enable during Sleep and Stop modes 24 1 UART4SMEN UART4 clocks enable during Sleep and Stop modes 19 1 read-write APB1SMENR2 APB1SMENR2 APB1 peripheral clocks enable in Sleep and Stop modes register 2 0x7C 0x20 read-write 0x00000021 LPTIM2SMEN LPTIM2SMEN 5 1 LPUART1SMEN Low power UART 1 clocks enable during Sleep and Stop modes 0 1 APB2SMENR APB2SMENR APB2SMENR 0x80 0x20 read-write 0x00035801 TIM16SMEN TIM16 timer clocks enable during Sleep and Stop modes 17 1 TIM15SMEN TIM15 timer clocks enable during Sleep and Stop modes 16 1 USART1SMEN USART1clocks enable during Sleep and Stop modes 14 1 SPI1SMEN SPI1 clocks enable during Sleep and Stop modes 12 1 TIM1SMEN TIM1 timer clocks enable during Sleep and Stop modes 11 1 SYSCFGSMEN SYSCFG clocks enable during Sleep and Stop modes 0 1 CCIPR CCIPR CCIPR 0x88 0x20 read-write 0x00000000 CLK48SEL 48 MHz clock source selection 26 2 CLK48SEL HSI48 HSI48 clock selected (only for STM32L41x/L42x/L43x/L44x/L45x/L46x/L49x/L4Ax devices, otherwise no clock selected) 0 PLLSAI1 PLLSAI1 clock selected 1 PLL PLL clock selected 2 MSI MSI clock selected 3 LPTIM1SEL Low power timer 1 clock source selection 18 2 LPTIM1SEL PCLK PCLK clock selected 0 LSI LSI clock selected 1 HSI16 HSI16 clock selected 2 LSE LSE clock selected 3 LPTIM2SEL Low power timer 2 clock source selection 20 2 I2C1SEL I2C1 clock source selection 12 2 I2C1SEL PCLK PCLK clock selected 0 SYSCLK SYSCLK clock selected 1 HSI16 HSI16 clock selected 2 I2C3SEL I2C3 clock source selection 16 2 I2C2SEL I2C2 clock source selection 14 2 LPUART1SEL LPUART1 clock source selection 10 2 LPUART1SEL PCLK PCLK clock selected 0 SYSCLK SYSCLK clock selected 1 HSI16 HSI16 clock selected 2 LSE LSE clock selected 3 USART1SEL USART1 clock source selection 0 2 USART1SEL PCLK PCLK clock selected 0 SYSCLK SYSCLK clock selected 1 HSI16 HSI16 clock selected 2 LSE LSE clock selected 3 USART3SEL USART3 clock source selection 4 2 USART2SEL USART2 clock source selection 2 2 ADCSEL ADCSEL 28 2 ADCSEL NoClock No clock selected 0 PLLSAI1 PLLSAI1 clock selected 1 PLLSAI2 PLLSAI2 clock selected (only for STM32L47x/L48x/L49x/L4Ax devices) 2 SYSCLK SYSCLK clock selected 3 BDCR BDCR BDCR 0x90 0x20 0x00000000 LSCOSEL Low speed clock output selection 25 1 read-write LSCOEN Low speed clock output enable 24 1 read-write BDRST Backup domain software reset 16 1 read-write RTCEN RTC clock enable 15 1 read-write RTCEN Disabled RTC clock disabled 0 Enabled RTC clock enabled 1 RTCSEL RTC clock source selection 8 2 read-write RTCSEL NoClock No clock 0 LSE LSE oscillator clock selected 1 LSI LSI oscillator clock selected 2 HSE HSE oscillator clock divided by 32 selected 3 LSECSSD LSECSSD 6 1 read-only LSECSSON LSECSSON 5 1 read-write LSEDRV SE oscillator drive capability 3 2 read-write LSEBYP LSE oscillator bypass 2 1 read-write LSERDY LSE oscillator ready 1 1 read-only LSEON LSE oscillator enable 0 1 read-write CSR CSR CSR 0x94 0x20 0x0C000600 LPWRSTF Low-power reset flag 31 1 read-only WWDGRSTF Window watchdog reset flag 30 1 read-only IWDGRSTF Independent window watchdog reset flag 29 1 read-only SFTRSTF Software reset flag 28 1 read-only BORRSTF BOR flag 27 1 read-only PINRSTF Pin reset flag 26 1 read-only OBLRSTF Option byte loader reset flag 25 1 read-only FIREWALLRSTF Firewall reset flag 24 1 read-only RMVF Remove reset flag 23 1 read-write MSISRANGE SI range after Standby mode 8 4 read-write LSIRDY LSI oscillator ready 1 1 read-only LSION LSI oscillator enable 0 1 read-write CRRCR CRRCR Clock recovery RC register 0x98 0x20 0x00000000 HSI48CAL HSI48 clock calibration 7 9 read-only HSI48RDY HSI48 clock ready flag 1 1 read-only HSI48ON HSI48 clock enable 0 1 read-write CCIPR2 CCIPR2 Peripherals independent clock configuration register 0x9C 0x20 0x00000000 I2C4SEL_1 I2C4 clock source selection 1 1 read-only I2C4SEL_0 I2C4 clock source selection 0 1 read-write USB Universal serial bus full-speed device interface USB 0x40006800 0x0 0x800 registers USB_FS USB event interrupt through EXTI 67 8 0x4 0-7 EP%sR EP%sR endpoint %s register 0x0 0x10 read-write 0x00000000 EA Endpoint address 0 4 0 15 STAT_TX Status bits, for transmission transfers 4 2 read-write oneToToggle STAT_TXR read Disabled all transmission requests addressed to this endpoint are ignored 0 Stall the endpoint is stalled and all transmission requests result in a STALL handshake 1 Nak the endpoint is naked and all transmission requests result in a NAK handshake 2 Valid this endpoint is enabled for transmission 3 DTOG_TX Data Toggle, for transmission transfers 6 1 oneToToggle CTR_TX Correct Transfer for transmission 7 1 zeroToClear EP_KIND Endpoint kind 8 1 EP_TYPE Endpoint type 9 2 EP_TYPE Bulk Bulk endpoint 0 Control Control endpoint 1 Iso Iso endpoint 2 Interrupt Interrupt endpoint 3 SETUP Setup transaction completed 11 1 STAT_RX Status bits, for reception transfers 12 2 read-write oneToToggle STAT_RXR read Disabled all reception requests addressed to this endpoint are ignored 0 Stall the endpoint is stalled and all reception requests result in a STALL handshake 1 Nak the endpoint is naked and all reception requests result in a NAK handshake 2 Valid this endpoint is enabled for reception 3 DTOG_RX Data Toggle, for reception transfers 14 1 oneToToggle CTR_RX Correct transfer for reception 15 1 zeroToClear CNTR CNTR control register 0x40 0x10 read-write 0x00000003 FRES Force USB Reset 0 1 FRES NoReset Clear USB reset 0 Reset Force a reset of the USB peripheral, exactly like a RESET signaling on the USB 1 PDWN Power down 1 1 PDWN Disabled No power down 0 Enabled Enter power down mode 1 LPMODE Low-power mode 2 1 LPMODE Disabled No low-power mode 0 Enabled Enter low-power mode 1 FSUSP Force suspend 3 1 FSUSP NoEffect No effect 0 Suspend Enter suspend mode. Clocks and static power dissipation in the analog transceiver are left unaffected 1 RESUME Resume request 4 1 RESUME Requested Resume requested 1 L1RESUME LPM L1 Resume request 5 1 L1RESUME Requested LPM L1 request requested 1 L1REQM LPM L1 state request interrupt mask 7 1 L1REQM Disabled L1REQ Interrupt disabled 0 Enabled L1REQ Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set 1 ESOFM Expected start of frame interrupt mask 8 1 ESOFM Disabled ESOF Interrupt disabled 0 Enabled ESOF Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set 1 SOFM Start of frame interrupt mask 9 1 SOFM Disabled SOF Interrupt disabled 0 Enabled SOF Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set 1 RESETM USB reset interrupt mask 10 1 RESETM Disabled RESET Interrupt disabled 0 Enabled RESET Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set 1 SUSPM Suspend mode interrupt mask 11 1 SUSPM Disabled Suspend Mode Request SUSP Interrupt disabled 0 Enabled SUSP Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set 1 WKUPM Wakeup interrupt mask 12 1 WKUPM Disabled WKUP Interrupt disabled 0 Enabled WKUP Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set 1 ERRM Error interrupt mask 13 1 ERRM Disabled ERR Interrupt disabled 0 Enabled ERR Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set 1 PMAOVRM Packet memory area over / underrun interrupt mask 14 1 PMAOVRM Disabled PMAOVR Interrupt disabled 0 Enabled PMAOVR Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set 1 CTRM Correct transfer interrupt mask 15 1 CTRM Disabled Correct Transfer (CTR) Interrupt disabled 0 Enabled CTR Interrupt enabled, an interrupt request is generated when the corresponding bit in the USB_ISTR register is set 1 ISTR ISTR interrupt status register 0x44 0x10 0x00000000 EP_ID Endpoint Identifier 0 4 read-only 0 15 DIR Direction of transaction 4 1 read-only DIR To Data transmitted by the USB peripheral to the host PC 0 From Data received by the USB peripheral from the host PC 1 L1REQ LPM L1 state request 7 1 read-write zeroToClear L1REQR read NotReceived LPM command to enter the L1 state is not received 0 Received LPM command to enter the L1 state is successfully received and acknowledged 1 L1REQW write Clear Clear flag 0 ESOF Expected start frame 8 1 read-write zeroToClear ESOFR read NotExpectedStartOfFrame NotExpectedStartOfFrame 0 ExpectedStartOfFrame An SOF packet is expected but not received 1 ESOFW write Clear Clear flag 0 SOF start of frame 9 1 read-write zeroToClear SOFR read NotStartOfFrame NotStartOfFrame 0 StartOfFrame Beginning of a new USB frame and it is set when a SOF packet arrives through the USB bus 1 SOFW write Clear Clear flag 0 RESET reset request 10 1 read-write zeroToClear RESETR read NotReset NotReset 0 Reset Peripheral detects an active USB RESET signal at its inputs 1 RESETW write Clear Clear flag 0 SUSP Suspend mode request 11 1 read-write zeroToClear SUSPR read NotSuspend NotSuspend 0 Suspend No traffic has been received for 3 ms, indicating a suspend mode request from the USB bus 1 SUSPW write Clear Clear flag 0 WKUP Wakeup 12 1 read-write zeroToClear WKUPR read NotWakeup NotWakeup 0 Wakeup Activity is detected that wakes up the USB peripheral 1 WKUPW write Clear Clear flag 0 ERR Error 13 1 read-write zeroToClear ERRR read NotOverrun Errors are not occurred 0 Error One of No ANSwer, Cyclic Redundancy Check, Bit Stuffing or Framing format Violation error occurred 1 ERRW write Clear Clear flag 0 PMAOVR Packet memory area over / underrun 14 1 read-write zeroToClear PMAOVRR read NotOverrun Overrun is not occurred 0 Overrun Microcontroller has not been able to respond in time to an USB memory request 1 PMAOVRW write Clear Clear flag 0 CTR Correct transfer 15 1 read-only CTR Completed Endpoint has successfully completed a transaction 1 FNR FNR frame number register 0x48 0x10 read-only 0x00000000 FN Frame number 0 11 0 2047 LSOF Lost SOF 11 2 0 3 LCK Locked 13 1 LCK Locked the frame timer remains in this state until an USB reset or USB suspend event occurs 1 RXDM Receive data - line status 14 1 RXDM Received received data minus upstream port data line 1 RXDP Receive data + line status 15 1 RXDP Received received data plus upstream port data line 1 DADDR DADDR device address 0x4C 0x10 read-write 0x00000000 ADD Device address 0 7 0 127 EF Enable function 7 1 EF Disabled USB device disabled 0 Enabled USB device enabled 1 BTABLE BTABLE Buffer table address 0x50 0x10 read-write 0x00000000 BTABLE Buffer table 3 13 0 8191 LPMCSR LPMCSR LPM control and status register 0x54 0x10 0x00000000 BESL BESL value 4 4 read-only 0 15 REMWAKE RemoteWake value 3 1 read-only LPMACK LPM Token acknowledge enable 1 1 read-write LPMACK Nyet The valid LPM Token will be NYET 0 Ack The valid LPM Token will be ACK 1 LPMEN LPM support enable 0 1 read-write LPMEN Disabled No LPM transactions are handled 0 Enabled Enable the LPM support within the USB device 1 BCDR BCDR Battery charging detector 0x58 0x10 0x00000000 DPPU DP pull-up control 15 1 read-write DPPU Disabled signalize disconnect to the host when needed by the user software 0 Enabled enable the embedded pull-up on the DP line 1 PS2DET DM pull-up detection status 7 1 read-only PS2DET Normal Normal port detected 0 PS2 PS2 port or proprietary charger detected 1 SDET Secondary detection (SD) status 6 1 read-only SDET CDP CDP detected 0 DCP DCP detected 1 PDET Primary detection (PD) status 5 1 read-only PDET NoBCD no BCD support detected 0 BCD BCD support detected 1 DCDET Data contact detection (DCD) status 4 1 read-only DCDET NotDetected data lines contact not detected 0 Detected data lines contact detected 1 SDEN Secondary detection (SD) mode enable 3 1 read-write SDEN Disabled Secondary detection (SD) mode disabled 0 Enabled Secondary detection (SD) mode enabled 1 PDEN Primary detection (PD) mode enable 2 1 read-write PDEN Disabled Primary detection (PD) mode disabled 0 Enabled Primary detection (PD) mode enabled 1 DCDEN Data contact detection (DCD) mode enable 1 1 read-write DCDEN Disabled Data contact detection (DCD) mode disabled 0 Enabled Data contact detection (DCD) mode enabled 1 BCDEN Battery charging detector (BCD) enable 0 1 read-write BCDEN Disabled disable the BCD support 0 Enabled enable the BCD support within the USB device 1 COUNT0_TX COUNT0_TX Transmission byte count 0 0x52 0x10 read-write 0x00000000 COUNT0_TX Transmission byte count 0 10 COUNT1_TX COUNT1_TX Transmission byte count 0 0x5A 0x10 read-write 0x00000000 COUNT1_TX Transmission byte count 0 10 COUNT2_TX COUNT2_TX Transmission byte count 0 0x62 0x10 read-write 0x00000000 COUNT2_TX Transmission byte count 0 10 COUNT3_TX COUNT3_TX Transmission byte count 0 0x6A 0x10 read-write 0x00000000 COUNT3_TX Transmission byte count 0 10 COUNT4_TX COUNT4_TX Transmission byte count 0 0x72 0x10 read-write 0x00000000 COUNT4_TX Transmission byte count 0 10 COUNT5_TX COUNT5_TX Transmission byte count 0 0x7A 0x10 read-write 0x00000000 COUNT5_TX Transmission byte count 0 10 COUNT6_TX COUNT6_TX Transmission byte count 0 0x82 0x10 read-write 0x00000000 COUNT6_TX Transmission byte count 0 10 COUNT7_TX COUNT7_TX Transmission byte count 0 0x8A 0x10 read-write 0x00000000 COUNT7_TX Transmission byte count 0 10 ADDR2_TX ADDR2_TX Transmission buffer address 2 0x60 0x10 read-write 0x00000000 ADDR2_TX Transmission buffer address 1 15 ADDR3_TX ADDR3_TX Transmission buffer address 3 0x68 0x10 read-write 0x00000000 ADDR3_TX Transmission buffer address 1 15 ADDR4_TX ADDR4_TX Transmission buffer address 0 0x70 0x10 read-write 0x00000000 ADDR4_RX Transmission buffer address 1 15 ADDR5_TX ADDR5_TX Transmission buffer address 0 0x78 0x10 read-write 0x00000000 ADDR5_TX Transmission buffer address 1 15 ADDR6_TX ADDR6_TX Transmission buffer address 0 0x80 0x10 read-write 0x00000000 ADDR6_TX Transmission buffer address 1 15 ADDR7_TX ADDR7_TX Transmission buffer address 0 0x88 0x10 read-write 0x00000000 ADDR7_TX Transmission buffer address 1 15 ADDR0_RX ADDR0_RX Reception buffer address 0 LPMCSR 0x54 0x10 read-write 0x00000000 ADDR0_RX Reception buffer address 1 15 ADDR1_RX ADDR1_RX Reception buffer address 0 0x5C 0x10 read-write 0x00000000 ADDR1_RX Reception buffer address 1 15 ADDR2_RX ADDR2_RX Reception buffer address 0 0x64 0x10 read-write 0x00000000 ADDR2_RX Reception buffer address 1 15 ADDR3_RX ADDR3_RX Reception buffer address 0 0x6C 0x10 read-write 0x00000000 ADDR3_RX Reception buffer address 1 15 ADDR4_RX ADDR4_RX Reception buffer address 0 0x74 0x10 read-write 0x00000000 ADDR4_RX Reception buffer address 1 15 ADDR5_RX ADDR5_RX Reception buffer address 0 0x7C 0x10 read-write 0x00000000 ADDR5_RX Reception buffer address 1 15 ADDR6_RX ADDR6_RX Reception buffer address 0 0x84 0x10 read-write 0x00000000 ADDR6_RX Reception buffer address 1 15 ADDR7_RX ADDR7_RX Reception buffer address 0 0x8C 0x10 read-write 0x00000000 ADDR7_RX Reception buffer address 1 15 COUNT0_RX COUNT0_RX Reception byte count 0 0x56 0x10 0x00000000 COUNT0_RX Reception byte count 0 10 read-only NUM_BLOCK Number of blocks 10 5 read-write BL_SIZE Block size 15 1 read-write COUNT1_RX COUNT1_RX Reception byte count 0 0x5E 0x10 0x00000000 COUNT1_RX Reception byte count 0 10 read-only NUM_BLOCK Number of blocks 10 5 read-write BL_SIZE Block size 15 1 read-write COUNT2_RX COUNT2_RX Reception byte count 0 0x66 0x10 0x00000000 COUNT2_RX Reception byte count 0 10 read-only NUM_BLOCK Number of blocks 10 5 read-write BL_SIZE Block size 15 1 read-write COUNT3_RX COUNT3_RX Reception byte count 0 0x6E 0x10 0x00000000 COUNT3_RX Reception byte count 0 10 read-only NUM_BLOCK Number of blocks 10 5 read-write BL_SIZE Block size 15 1 read-write COUNT4_RX COUNT4_RX Reception byte count 0 0x76 0x10 0x00000000 COUNT4_RX Reception byte count 0 10 read-only NUM_BLOCK Number of blocks 10 5 read-write BL_SIZE Block size 15 1 read-write COUNT5_RX COUNT5_RX Reception byte count 0 0x7E 0x10 0x00000000 COUNT5_RX Reception byte count 0 10 read-only NUM_BLOCK Number of blocks 10 5 read-write BL_SIZE Block size 15 1 read-write COUNT6_RX COUNT6_RX Reception byte count 0 0x86 0x10 0x00000000 COUNT6_RX Reception byte count 0 10 read-only NUM_BLOCK Number of blocks 10 5 read-write BL_SIZE Block size 15 1 read-write COUNT7_RX COUNT7_RX Reception byte count 0 0x8E 0x10 0x00000000 COUNT7_RX Reception byte count 0 10 read-only NUM_BLOCK Number of blocks 10 5 read-write BL_SIZE Block size 15 1 read-write USART2 Universal synchronous asynchronous receiver transmitter USART 0x40004400 0x0 0x400 registers CR1 CR1 Control register 1 0x0 0x20 read-write 0x00000000 M1 Word length 28 1 M1 M0 Use M0 to set the data bits 0 Bit7 1 start bit, 7 data bits, n stop bits 1 EOBIE End of Block interrupt enable 27 1 EOBIE Disabled Interrupt is inhibited 0 Enabled A USART interrupt is generated when the EOBF flag is set in the ISR register 1 RTOIE Receiver timeout interrupt enable 26 1 RTOIE Disabled Interrupt is inhibited 0 Enabled An USART interrupt is generated when the RTOF bit is set in the ISR register 1 DEAT Driver Enable assertion time 21 5 0 31 DEDT Driver Enable de-assertion time 16 5 0 31 OVER8 Oversampling mode 15 1 OVER8 Oversampling16 Oversampling by 16 0 Oversampling8 Oversampling by 8 1 CMIE Character match interrupt enable 14 1 CMIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated when the CMF bit is set in the ISR register 1 MME Mute mode enable 13 1 MME Disabled Receiver in active mode permanently 0 Enabled Receiver can switch between mute mode and active mode 1 M0 Word length 12 1 M0 Bit8 1 start bit, 8 data bits, n stop bits 0 Bit9 1 start bit, 9 data bits, n stop bits 1 WAKE Receiver wakeup method 11 1 WAKE Idle Idle line 0 Address Address mask 1 PCE Parity control enable 10 1 PCE Disabled Parity control disabled 0 Enabled Parity control enabled 1 PS Parity selection 9 1 PS Even Even parity 0 Odd Odd parity 1 PEIE PE interrupt enable 8 1 PEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever PE=1 in the ISR register 1 TXEIE interrupt enable 7 1 TXEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever TXE=1 in the ISR register 1 TCIE Transmission complete interrupt enable 6 1 TCIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever TC=1 in the ISR register 1 RXNEIE RXNE interrupt enable 5 1 RXNEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever ORE=1 or RXNE=1 in the ISR register 1 IDLEIE IDLE interrupt enable 4 1 IDLEIE Disabled Interrupt is disabled 0 Enabled Interrupt is generated whenever IDLE=1 in the ISR register 1 TE Transmitter enable 3 1 TE Disabled Transmitter is disabled 0 Enabled Transmitter is enabled 1 RE Receiver enable 2 1 RE Disabled Receiver is disabled 0 Enabled Receiver is enabled 1 UESM USART enable in Stop mode 1 1 UESM Disabled USART not able to wake up the MCU from Stop mode 0 Enabled USART able to wake up the MCU from Stop mode 1 UE USART enable 0 1 UE Disabled UART is disabled 0 Enabled UART is enabled 1 CR2 CR2 Control register 2 0x4 0x20 read-write 0x00000000 ADD Address of the USART node 24 8 0 255 RTOEN Receiver timeout enable 23 1 RTOEN Disabled Receiver timeout feature disabled 0 Enabled Receiver timeout feature enabled 1 ABRMOD Auto baud rate mode 21 2 ABRMOD Start Measurement of the start bit is used to detect the baud rate 0 Edge Falling edge to falling edge measurement 1 Frame7F 0x7F frame detection 2 Frame55 0x55 frame detection 3 ABREN Auto baud rate enable 20 1 ABREN Disabled Auto baud rate detection is disabled 0 Enabled Auto baud rate detection is enabled 1 MSBFIRST Most significant bit first 19 1 MSBFIRST LSB data is transmitted/received with data bit 0 first, following the start bit 0 MSB data is transmitted/received with MSB (bit 7/8/9) first, following the start bit 1 DATAINV Binary data inversion 18 1 DATAINV Positive Logical data from the data register are send/received in positive/direct logic 0 Negative Logical data from the data register are send/received in negative/inverse logic 1 TXINV TX pin active level inversion 17 1 TXINV Standard TX pin signal works using the standard logic levels 0 Inverted TX pin signal values are inverted 1 RXINV RX pin active level inversion 16 1 RXINV Standard RX pin signal works using the standard logic levels 0 Inverted RX pin signal values are inverted 1 SWAP Swap TX/RX pins 15 1 SWAP Standard TX/RX pins are used as defined in standard pinout 0 Swapped The TX and RX pins functions are swapped 1 LINEN LIN mode enable 14 1 LINEN Disabled LIN mode disabled 0 Enabled LIN mode enabled 1 STOP STOP bits 12 2 STOP Stop1 1 stop bit 0 Stop0p5 0.5 stop bit 1 Stop2 2 stop bit 2 Stop1p5 1.5 stop bit 3 CLKEN Clock enable 11 1 CLKEN Disabled CK pin disabled 0 Enabled CK pin enabled 1 CPOL Clock polarity 10 1 CPOL Low Steady low value on CK pin outside transmission window 0 High Steady high value on CK pin outside transmission window 1 CPHA Clock phase 9 1 CPHA First The first clock transition is the first data capture edge 0 Second The second clock transition is the first data capture edge 1 LBCL Last bit clock pulse 8 1 LBCL NotOutput The clock pulse of the last data bit is not output to the CK pin 0 Output The clock pulse of the last data bit is output to the CK pin 1 LBDIE LIN break detection interrupt enable 6 1 LBDIE Disabled Interrupt is inhibited 0 Enabled An interrupt is generated whenever LBDF=1 in the ISR register 1 LBDL LIN break detection length 5 1 LBDL Bit10 10-bit break detection 0 Bit11 11-bit break detection 1 ADDM7 7-bit Address Detection/4-bit Address Detection 4 1 ADDM7 Bit4 4-bit address detection 0 Bit7 7-bit address detection 1 CR3 CR3 Control register 3 0x8 0x20 read-write 0x00000000 WUFIE Wakeup from Stop mode interrupt enable 22 1 WUFIE Disabled Interrupt is inhibited 0 Enabled An USART interrupt is generated whenever WUF=1 in the ISR register 1 WUS Wakeup from Stop mode interrupt flag selection 20 2 WUS Address WUF active on address match 0 Start WuF active on Start bit detection 2 RXNE WUF active on RXNE 3 SCARCNT Smartcard auto-retry count 17 3 0 7 DEP Driver enable polarity selection 15 1 DEP High DE signal is active high 0 Low DE signal is active low 1 DEM Driver enable mode 14 1 DEM Disabled DE function is disabled 0 Enabled The DE signal is output on the RTS pin 1 DDRE DMA Disable on Reception Error 13 1 DDRE NotDisabled DMA is not disabled in case of reception error 0 Disabled DMA is disabled following a reception error 1 OVRDIS Overrun Disable 12 1 OVRDIS Enabled Overrun Error Flag, ORE, is set when received data is not read before receiving new data 0 Disabled Overrun functionality is disabled. If new data is received while the RXNE flag is still set the ORE flag is not set and the new received data overwrites the previous content of the RDR register 1 ONEBIT One sample bit method enable 11 1 ONEBIT Sample3 Three sample bit method 0 Sample1 One sample bit method 1 CTSIE CTS interrupt enable 10 1 CTSIE Disabled Interrupt is inhibited 0 Enabled An interrupt is generated whenever CTSIF=1 in the ISR register 1 CTSE CTS enable 9 1 CTSE Disabled CTS hardware flow control disabled 0 Enabled CTS mode enabled, data is only transmitted when the CTS input is asserted 1 RTSE RTS enable 8 1 RTSE Disabled RTS hardware flow control disabled 0 Enabled RTS output enabled, data is only requested when there is space in the receive buffer 1 DMAT DMA enable transmitter 7 1 DMAT Disabled DMA mode is disabled for transmission 0 Enabled DMA mode is enabled for transmission 1 DMAR DMA enable receiver 6 1 DMAR Disabled DMA mode is disabled for reception 0 Enabled DMA mode is enabled for reception 1 SCEN Smartcard mode enable 5 1 SCEN Disabled Smartcard Mode disabled 0 Enabled Smartcard Mode enabled 1 NACK Smartcard NACK enable 4 1 NACK Disabled NACK transmission in case of parity error is disabled 0 Enabled NACK transmission during parity error is enabled 1 HDSEL Half-duplex selection 3 1 HDSEL NotSelected Half duplex mode is not selected 0 Selected Half duplex mode is selected 1 IRLP Ir low-power 2 1 IRLP Normal Normal mode 0 LowPower Low-power mode 1 IREN Ir mode enable 1 1 IREN Disabled IrDA disabled 0 Enabled IrDA enabled 1 EIE Error interrupt enable 0 1 EIE Disabled Interrupt is inhibited 0 Enabled An interrupt is generated when FE=1 or ORE=1 or NF=1 in the ISR register 1 UCESM USART Clock Enable in Stop mode 23 1 UCESM Disabled USART clock is disabled in STOP mode 0 Enabled USART clock is enabled in STOP mode 1 TCBGTIE Transmission complete before guard time interrupt enable 24 1 TCBGTIE Disabled Interrupt is inhibited 0 Enabled An USART interrupt is generated whenever TCBGT=1 in the ISR register 1 BRR BRR Baud rate register 0xC 0x20 read-write 0x00000000 BRR DIV_Mantissa 0 16 0 65535 GTPR GTPR Guard time and prescaler register 0x10 0x20 read-write 0x00000000 GT Guard time value 8 8 0 255 PSC Prescaler value 0 8 0 255 RTOR RTOR Receiver timeout register 0x14 0x20 read-write 0x00000000 BLEN Block Length 24 8 0 255 RTO Receiver timeout value 0 24 0 16777215 RQR RQR Request register 0x18 0x20 write-only 0x00000000 TXFRQ Transmit data flush request 4 1 TXFRQ Discard Set the TXE flags. This allows to discard the transmit data 1 RXFRQ Receive data flush request 3 1 RXFRQ Discard clears the RXNE flag. This allows to discard the received data without reading it, and avoid an overrun condition 1 MMRQ Mute mode request 2 1 MMRQ Mute Puts the USART in mute mode and sets the RWU flag 1 SBKRQ Send break request 1 1 SBKRQ Break sets the SBKF flag and request to send a BREAK on the line, as soon as the transmit machine is available 1 ABRRQ Auto baud rate request 0 1 ABRRQ Request resets the ABRF flag in the USART_ISR and request an automatic baud rate measurement on the next received data frame 1 ISR ISR Interrupt & status register 0x1C 0x20 read-only 0x020000C0 REACK REACK 22 1 TEACK TEACK 21 1 WUF WUF 20 1 RWU RWU 19 1 RWU Active Receiver in Active mode 0 Mute Receiver in Mute mode 1 SBKF SBKF 18 1 SBKF NoBreak No break character transmitted 0 Break Break character transmitted 1 CMF CMF 17 1 CMF NoMatch No Character match detected 0 Match Character match detected 1 BUSY BUSY 16 1 BUSY Idle USART is idle (no reception) 0 Busy Reception on going 1 ABRF ABRF 15 1 ABRE ABRE 14 1 EOBF EOBF 12 1 EOBF NotReached End of Block not reached 0 Reached End of Block (number of characters) reached 1 RTOF RTOF 11 1 RTOF NotReached Timeout value not reached 0 Reached Timeout value reached without any data reception 1 CTS CTS 10 1 CTS Set CTS line set 0 Reset CTS line reset 1 CTSIF CTSIF 9 1 CTSIF NotChanged No change occurred on the CTS status line 0 Changed A change occurred on the CTS status line 1 LBDF LBDF 8 1 LBDF NotDetected LIN break not detected 0 Detected LIN break detected 1 TXE TXE 7 1 TXE Full Transmit FIFO is full 0 NotFull Transmit FIFO is not full 1 TC TC 6 1 TC TxNotComplete Transmission is not complete 0 TxComplete Transmission is complete 1 RXNE RXNE 5 1 RXNE NoData Data is not received 0 DataReady Received data is ready to be read 1 IDLE IDLE 4 1 IDLE NoIdle No Idle Line is detected 0 Idle Idle Line is detected 1 ORE ORE 3 1 ORE NoOverrun No Overrun error 0 Overrun Overrun error is detected 1 NF NF 2 1 NF NoNoise No noise is detected 0 Noise Noise is detected 1 FE FE 1 1 FE NoError No Framing error is detected 0 Error Framing error or break character is detected 1 PE PE 0 1 PE NoError No parity error 0 Error Parity error 1 TCBGT Transmission complete before guard time completion 25 1 TCBGT NotCompleted Transmission not completed 0 Completed Transmission has completed 1 ICR ICR Interrupt flag clear register 0x20 0x20 write-only 0x00000000 WUCF Wakeup from Stop mode clear flag 20 1 oneToClear WUCF Clear Clears the WUF flag in the ISR register 1 CMCF Character match clear flag 17 1 oneToClear CMCF Clear Clears the CMF flag in the ISR register 1 EOBCF End of block clear flag 12 1 oneToClear EOBCF Clear Clears the EOBF flag in the ISR register 1 RTOCF Receiver timeout clear flag 11 1 oneToClear RTOCF Clear Clears the RTOF flag in the ISR register 1 CTSCF CTS clear flag 9 1 oneToClear CTSCF Clear Clears the CTSIF flag in the ISR register 1 LBDCF LIN break detection clear flag 8 1 oneToClear LBDCF Clear Clears the LBDF flag in the ISR register 1 TCCF Transmission complete clear flag 6 1 oneToClear TCCF Clear Clears the TC flag in the ISR register 1 IDLECF Idle line detected clear flag 4 1 oneToClear IDLECF Clear Clears the IDLE flag in the ISR register 1 ORECF Overrun error clear flag 3 1 oneToClear ORECF Clear Clears the ORE flag in the ISR register 1 NCF Noise detected clear flag 2 1 oneToClear NCF Clear Clears the NF flag in the ISR register 1 FECF Framing error clear flag 1 1 oneToClear FECF Clear Clears the FE flag in the ISR register 1 PECF Parity error clear flag 0 1 oneToClear PECF Clear Clears the PE flag in the ISR register 1 RDR RDR Receive data register 0x24 0x20 read-only 0x00000000 RDR Receive data value 0 9 0 511 TDR TDR Transmit data register 0x28 0x20 read-write 0x00000000 TDR Transmit data value 0 9 0 511 USART3 0x40004800 USART1 USART1 global interrupt 37