block/STK:
  description: SysTick timer.
  items:
  - name: CTRL
    description: SysTick control and status register.
    byte_offset: 0
    fieldset: CTRL
  - name: LOAD_
    description: SysTick reload value register.
    byte_offset: 4
    fieldset: LOAD_
  - name: VAL
    description: SysTick current value register.
    byte_offset: 8
    fieldset: VAL
  - name: CALIB
    description: SysTick calibration value register.
    byte_offset: 12
    fieldset: CALIB
fieldset/CALIB:
  description: SysTick calibration value register.
  fields:
  - name: TENMS
    description: Calibration value.
    bit_offset: 0
    bit_size: 24
fieldset/CTRL:
  description: SysTick control and status register.
  fields:
  - name: ENABLE
    description: Counter enable.
    bit_offset: 0
    bit_size: 1
  - name: TICKINT
    description: SysTick exception request enable.
    bit_offset: 1
    bit_size: 1
  - name: CLKSOURCE
    description: Clock source selection.
    bit_offset: 2
    bit_size: 1
  - name: COUNTFLAG
    description: COUNTFLAG.
    bit_offset: 16
    bit_size: 1
fieldset/LOAD_:
  description: SysTick reload value register.
  fields:
  - name: RELOAD
    description: RELOAD value.
    bit_offset: 0
    bit_size: 24
fieldset/VAL:
  description: SysTick current value register.
  fields:
  - name: CURRENT
    description: Current counter value.
    bit_offset: 0
    bit_size: 24