block/FLASH:
  description: FLASH.
  items:
  - name: ACR
    description: Flash access control register.
    byte_offset: 0
    fieldset: ACR
  - name: KEYR
    description: Flash key register.
    byte_offset: 4
    access: Write
    fieldset: KEYR
  - name: OPTKEYR
    description: Flash option key register.
    byte_offset: 8
    access: Write
    fieldset: OPTKEYR
  - name: SR
    description: Status register.
    byte_offset: 12
    fieldset: SR
  - name: CR
    description: Control register.
    byte_offset: 16
    fieldset: CR
  - name: AR
    description: Flash address register.
    byte_offset: 20
    access: Write
    fieldset: AR
  - name: OBR
    description: Option byte register.
    byte_offset: 28
    access: Read
    fieldset: OBR
  - name: WRPR
    description: Write protection register.
    byte_offset: 32
    access: Read
    fieldset: WRPR
fieldset/ACR:
  description: Flash access control register.
  fields:
  - name: LATENCY
    description: Latency.
    bit_offset: 0
    bit_size: 3
    enum: LATENCY
  - name: HLFCYA
    description: Flash half cycle access enable.
    bit_offset: 3
    bit_size: 1
  - name: PRFTBE
    description: Prefetch buffer enable.
    bit_offset: 4
    bit_size: 1
  - name: PRFTBS
    description: Prefetch buffer status.
    bit_offset: 5
    bit_size: 1
fieldset/AR:
  description: Flash address register.
  fields:
  - name: FAR
    description: Flash Address.
    bit_offset: 0
    bit_size: 32
fieldset/CR:
  description: Control register.
  fields:
  - name: PG
    description: Programming.
    bit_offset: 0
    bit_size: 1
  - name: PER
    description: Page Erase.
    bit_offset: 1
    bit_size: 1
  - name: MER
    description: Mass Erase.
    bit_offset: 2
    bit_size: 1
  - name: OPTPG
    description: Option byte programming.
    bit_offset: 4
    bit_size: 1
  - name: OPTER
    description: Option byte erase.
    bit_offset: 5
    bit_size: 1
  - name: STRT
    description: Start.
    bit_offset: 6
    bit_size: 1
  - name: LOCK
    description: Lock.
    bit_offset: 7
    bit_size: 1
  - name: OPTWRE
    description: Option bytes write enable.
    bit_offset: 9
    bit_size: 1
  - name: ERRIE
    description: Error interrupt enable.
    bit_offset: 10
    bit_size: 1
  - name: EOPIE
    description: End of operation interrupt enable.
    bit_offset: 12
    bit_size: 1
fieldset/KEYR:
  description: Flash key register.
  fields:
  - name: KEY
    description: FPEC key.
    bit_offset: 0
    bit_size: 32
fieldset/OBR:
  description: Option byte register.
  fields:
  - name: OPTERR
    description: Option byte error.
    bit_offset: 0
    bit_size: 1
  - name: RDPRT
    description: Read protection.
    bit_offset: 1
    bit_size: 1
  - name: WDG_SW
    description: WDG_SW.
    bit_offset: 2
    bit_size: 1
  - name: nRST_STOP
    description: nRST_STOP.
    bit_offset: 3
    bit_size: 1
  - name: nRST_STDBY
    description: nRST_STDBY.
    bit_offset: 4
    bit_size: 1
  - name: Data0
    description: Data0.
    bit_offset: 10
    bit_size: 8
  - name: Data1
    description: Data1.
    bit_offset: 18
    bit_size: 8
fieldset/OPTKEYR:
  description: Flash option key register.
  fields:
  - name: OPTKEY
    description: Option byte key.
    bit_offset: 0
    bit_size: 32
fieldset/SR:
  description: Status register.
  fields:
  - name: BSY
    description: Busy.
    bit_offset: 0
    bit_size: 1
  - name: PGERR
    description: Programming error.
    bit_offset: 2
    bit_size: 1
  - name: WRPRTERR
    description: Write protection error.
    bit_offset: 4
    bit_size: 1
  - name: EOP
    description: End of operation.
    bit_offset: 5
    bit_size: 1
fieldset/WRPR:
  description: Write protection register.
  fields:
  - name: WRP
    description: Write protect.
    bit_offset: 0
    bit_size: 32
enum/LATENCY:
  bit_size: 3
  variants:
  - name: WS0
    description: Zero wait state, if 0 < SYSCLK≤ 24 MHz.
    value: 0
  - name: WS1
    description: One wait state, if 24 MHz < SYSCLK ≤ 48 MHz.
    value: 1
  - name: WS2
    description: Two wait states, if 48 MHz < SYSCLK ≤ 72 MHz.
    value: 2