block/VREFBUF:
  description: Voltage reference buffer.
  items:
  - name: CSR
    description: control and status register.
    byte_offset: 0
    fieldset: CSR
  - name: CCR
    description: calibration control register.
    byte_offset: 4
    fieldset: CCR
fieldset/CCR:
  description: calibration control register.
  fields:
  - name: TRIM
    description: Trimming code.
    bit_offset: 0
    bit_size: 6
fieldset/CSR:
  description: control and status register.
  fields:
  - name: ENVR
    description: Voltage reference buffer mode enable.
    bit_offset: 0
    bit_size: 1
  - name: HIZ
    description: High impedance mode.
    bit_offset: 1
    bit_size: 1
    enum: HIZ
  - name: VRS
    description: Voltage reference scale.
    bit_offset: 2
    bit_size: 1
    enum: VRS
  - name: VRR
    description: Voltage reference buffer ready.
    bit_offset: 3
    bit_size: 1
enum/HIZ:
  bit_size: 1
  variants:
  - name: Connected
    description: VREF+ pin is internally connected to the voltage reference buffer output.
    value: 0
  - name: HighZ
    description: VREF+ pin is high impedance.
    value: 1
enum/VRS:
  bit_size: 1
  variants:
  - name: Vref0
    description: Voltage reference set to VREF_OUT1 (around 2.048 V).
    value: 0
  - name: Vref1
    description: Voltage reference set to VREF_OUT2 (around 2.5 V).
    value: 1