EXINT:
  _modify:
    GIFR:
      access: read-write
  MCUCR:
    _delete:
      ISC??:
    _add:
      ISC0:
        description: "Interrupt Sense Control 0 bits"
        bitOffset: 0
        bitWidth: 2
        access: read-write
    ISC0:
      _replace_enum:
        LOW: [0, "The low level of INTx generates an interrupt request"]
        TOGGLE: [1, "Any logical change on INTx generates an interrupt request"]
        FALLING: [2, "The falling edge of INTx generates an interrupt request"]
        RISING: [3, "The rising edge of INTx generates an interrupt request"]