Fields In FLASH_ACR (0x40022000, 0x0000)

Field	Offset	Width	STM32F0x8	STM32F103	STM32F107	STM32F217	STM32F303	STM32F3x4	STM32F469	STM32F7x9
LATENCY	0	3	✘	✔	✔	✘	✔	✔	✘	✘
HLFCYA	3	1	✘	✔	✔	✘	✔	✔	✘	✘
PRFTBE	4	1	✘	✔	✔	✘	✔	✔	✘	✘
PRFTBS	5	1	✘	✔	✔	✘	✔	✔	✘	✘