block/IWDG:
  description: Independent watchdog.
  items:
  - name: KR
    description: Key register (IWDG_KR).
    byte_offset: 0
    access: Write
    bit_size: 16
    fieldset: KR
  - name: PR
    description: Prescaler register (IWDG_PR).
    byte_offset: 4
    bit_size: 16
    fieldset: PR
  - name: RLR
    description: Reload register (IWDG_RLR).
    byte_offset: 8
    bit_size: 16
    fieldset: RLR
  - name: SR
    description: Status register (IWDG_SR).
    byte_offset: 12
    access: Read
    bit_size: 16
    fieldset: SR
fieldset/KR:
  description: Key register (IWDG_KR).
  bit_size: 16
  fields:
  - name: KEY
    description: Key value.
    bit_offset: 0
    bit_size: 16
    enum: KEY
fieldset/PR:
  description: Prescaler register (IWDG_PR).
  bit_size: 16
  fields:
  - name: PR
    description: Prescaler divider.
    bit_offset: 0
    bit_size: 3
    enum: PR
fieldset/RLR:
  description: Reload register (IWDG_RLR).
  bit_size: 16
  fields:
  - name: RL
    description: Watchdog counter reload value.
    bit_offset: 0
    bit_size: 12
fieldset/SR:
  description: Status register (IWDG_SR).
  bit_size: 16
  fields:
  - name: PVU
    description: Watchdog prescaler value update.
    bit_offset: 0
    bit_size: 1
  - name: RVU
    description: Watchdog counter reload value update.
    bit_offset: 1
    bit_size: 1
enum/KEY:
  bit_size: 16
  variants:
  - name: Unlock
    description: Enable access to PR, RLR and WINR registers.
    value: 21845
  - name: Feed
    description: Feed watchdog with RLR register value.
    value: 43690
  - name: Start
    description: Start the watchdog.
    value: 52428
enum/PR:
  bit_size: 3
  variants:
  - name: DivideBy4
    description: Divider /4.
    value: 0
  - name: DivideBy8
    description: Divider /8.
    value: 1
  - name: DivideBy16
    description: Divider /16.
    value: 2
  - name: DivideBy32
    description: Divider /32.
    value: 3
  - name: DivideBy64
    description: Divider /64.
    value: 4
  - name: DivideBy128
    description: Divider /128.
    value: 5