block/AFIO:
  description: Alternate function I/O.
  items:
  - name: EVCR
    description: Event Control Register (AFIO_EVCR).
    byte_offset: 0
    fieldset: EVCR
  - name: MAPR
    description: AF remap and debug I/O configuration register (AFIO_MAPR).
    byte_offset: 4
    fieldset: MAPR
  - name: EXTICR1
    description: External interrupt configuration register 1 (AFIO_EXTICR1).
    byte_offset: 8
    fieldset: EXTICR1
  - name: EXTICR2
    description: External interrupt configuration register 2 (AFIO_EXTICR2).
    byte_offset: 12
    fieldset: EXTICR2
  - name: EXTICR3
    description: External interrupt configuration register 3 (AFIO_EXTICR3).
    byte_offset: 16
    fieldset: EXTICR3
  - name: EXTICR4
    description: External interrupt configuration register 4 (AFIO_EXTICR4).
    byte_offset: 20
    fieldset: EXTICR4
  - name: MAPR2
    description: AF remap and debug I/O configuration register.
    byte_offset: 28
    fieldset: MAPR2
fieldset/EVCR:
  description: Event Control Register (AFIO_EVCR).
  fields:
  - name: PIN
    description: Pin selection.
    bit_offset: 0
    bit_size: 4
  - name: PORT
    description: Port selection.
    bit_offset: 4
    bit_size: 3
  - name: EVOE
    description: Event Output Enable.
    bit_offset: 7
    bit_size: 1
fieldset/EXTICR1:
  description: External interrupt configuration register 1 (AFIO_EXTICR1).
  fields:
  - name: EXTI0
    description: EXTI0 configuration.
    bit_offset: 0
    bit_size: 4
    enum: EXTI0
fieldset/EXTICR2:
  description: External interrupt configuration register 2 (AFIO_EXTICR2).
  fields: []
fieldset/EXTICR3:
  description: External interrupt configuration register 3 (AFIO_EXTICR3).
  fields: []
fieldset/EXTICR4:
  description: External interrupt configuration register 4 (AFIO_EXTICR4).
  fields: []
fieldset/MAPR:
  description: AF remap and debug I/O configuration register (AFIO_MAPR).
  fields:
  - name: SPI1_REMAP
    description: SPI1 remapping.
    bit_offset: 0
    bit_size: 1
  - name: I2C1_REMAP
    description: I2C1 remapping.
    bit_offset: 1
    bit_size: 1
  - name: USART1_REMAP
    description: USART1 remapping.
    bit_offset: 2
    bit_size: 1
  - name: USART2_REMAP
    description: USART2 remapping.
    bit_offset: 3
    bit_size: 1
  - name: USART3_REMAP
    description: USART3 remapping.
    bit_offset: 4
    bit_size: 2
  - name: TIM1_REMAP
    description: TIM1 remapping.
    bit_offset: 6
    bit_size: 2
  - name: TIM2_REMAP
    description: TIM2 remapping.
    bit_offset: 8
    bit_size: 2
  - name: TIM3_REMAP
    description: TIM3 remapping.
    bit_offset: 10
    bit_size: 2
  - name: TIM4_REMAP
    description: TIM4 remapping.
    bit_offset: 12
    bit_size: 1
  - name: CAN_REMAP
    description: CAN remapping.
    bit_offset: 13
    bit_size: 2
  - name: PD01_REMAP
    description: Port D0/Port D1 mapping on OSCIN/OSCOUT.
    bit_offset: 15
    bit_size: 1
  - name: TIM5CH4_IREMAP
    description: Set and cleared by software.
    bit_offset: 16
    bit_size: 1
  - name: ADC1_ETRGINJ_REMAP
    description: ADC 1 External trigger injected conversion remapping.
    bit_offset: 17
    bit_size: 1
  - name: ADC1_ETRGREG_REMAP
    description: ADC 1 external trigger regular conversion remapping.
    bit_offset: 18
    bit_size: 1
  - name: ADC2_ETRGINJ_REMAP
    description: ADC 2 external trigger injected conversion remapping.
    bit_offset: 19
    bit_size: 1
  - name: ADC2_ETRGREG_REMAP
    description: ADC 2 external trigger regular conversion remapping.
    bit_offset: 20
    bit_size: 1
  - name: SWJ_CFG
    description: Serial wire JTAG configuration.
    bit_offset: 24
    bit_size: 3
fieldset/MAPR2:
  description: AF remap and debug I/O configuration register.
  fields:
  - name: TIM9_REMAP
    description: TIM9 remapping.
    bit_offset: 5
    bit_size: 1
  - name: TIM10_REMAP
    description: TIM10 remapping.
    bit_offset: 6
    bit_size: 1
  - name: TIM11_REMAP
    description: TIM11 remapping.
    bit_offset: 7
    bit_size: 1
  - name: TIM13_REMAP
    description: TIM13 remapping.
    bit_offset: 8
    bit_size: 1
  - name: TIM14_REMAP
    description: TIM14 remapping.
    bit_offset: 9
    bit_size: 1
  - name: FSMC_NADV
    description: NADV connect/disconnect.
    bit_offset: 10
    bit_size: 1
enum/EXTI0:
  bit_size: 4
  variants:
  - name: PA
    description: Select PAx as the source input for the EXTIx external interrupt.
    value: 0
  - name: PB
    description: Select PBx as the source input for the EXTIx external interrupt.
    value: 1
  - name: PC
    description: Select PCx as the source input for the EXTIx external interrupt.
    value: 2
  - name: PD
    description: Select PDx as the source input for the EXTIx external interrupt.
    value: 3
  - name: PE
    description: Select PEx as the source input for the EXTIx external interrupt.
    value: 4
  - name: PF
    description: Select PFx as the source input for the EXTIx external interrupt.
    value: 5
  - name: PG
    description: Select PGx as the source input for the EXTIx external interrupt.
    value: 6