TWI:
  _modify:
    TWCR:
      access: read-write
  TWCR:
    _modify:
      TWWC:
        access: read-only
  TWAMR:
    _modify:
      TWAM:
        description: "TWI (Slave) Address Mask Bits"
  TWSR:
    _modify:
      TWS:
        access: read-only
    TWPS:
      _replace_enum:
        PRESCALER_1: [0, "Prescaler Value 1"]
        PRESCALER_4: [1, "Prescaler Value 4"]
        PRESCALER_16: [2, "Prescaler Value 16"]
        PRESCALER_64: [3, "Prescaler Value 64"]