typedef enum {
    MEIMotorTransceiverExtendedMaskD,
    MEIMotorTransceiverExtendedMaskE,
    MEIMotorTransceiverExtendedMaskF,
} MEIMotorTransceiverExtendedMask;

MotorTransceiverExtendedMask is an enumeration of Extended Transceiver I/O masks. Not valid on all XMP controllers.