block/VREFBUF:
  description: Voltage reference buffer.
  items:
  - name: CSR
    description: VREFBUF control and status register.
    byte_offset: 0
    fieldset: CSR
  - name: CCR
    description: VREFBUF calibration control register.
    byte_offset: 4
    fieldset: CCR
fieldset/CCR:
  description: VREFBUF calibration control register.
  fields:
  - name: TRIM
    description: 'Trimming code The TRIM code is a 6-bit unsigned data (minimum 000000, maximum 111111) that is set and updated according the mechanism described below. Reset: TRIM[5:0] is automatically initialized with the VRS = 0 trimming value stored in the Flash memory during the production test. VRS change: TRIM[5:0] is automatically initialized with the trimming value (corresponding to VRS setting) stored in the Flash memory during the production test. Write in TRIM[5:0]: User can modify the TRIM[5:0] with an arbitrary value. This is permanently disabling the control of the trimming value with VRS (until the device is reset). Note: If the user application performs the trimming, the trimming code must start from 000000 to 111111 in ascending order.'
    bit_offset: 0
    bit_size: 6
fieldset/CSR:
  description: VREFBUF control and status register.
  fields:
  - name: ENVR
    description: Voltage reference buffer mode enable This bit is used to enable the voltage reference buffer mode.
    bit_offset: 0
    bit_size: 1
  - name: HIZ
    description: High impedance mode This bit controls the analog switch to connect or not the VREF+ pin. Refer to for the mode descriptions depending on ENVR bit configuration.
    bit_offset: 1
    bit_size: 1
    enum: HIZ
  - name: VRR
    description: Voltage reference buffer ready.
    bit_offset: 3
    bit_size: 1
  - name: VRS
    description: 'Voltage reference scale These bits select the value generated by the voltage reference buffer. VRS = 000: VREFBUF0 voltage selected. VRS = 001: VREFBUF1 voltage selected. VRS = 010: VREFBUF2 voltage selected. VRS = 011: VREFBUF3 voltage selected. Others: Reserved Note: Refer to the product datasheet for each VREFBUFx voltage setting value. The software can program this bitfield only when the VREFBUF is disabled (ENVR=0).'
    bit_offset: 4
    bit_size: 3
    enum: VRS
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: 3
  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
  - name: Vref2
    description: Voltage reference set to VREF_OUT2 (around 2.5 V).
    value: 2
  - name: Vref3
    description: Voltage reference set to VREF_OUT2 (around 2.5 V).
    value: 3