REGISTER_SELECTION
#define SELECT_RLD u8_encode_bits(0x0, REGISTER_SELECTION)
#define SELECT_CMR u8_encode_bits(0x1, REGISTER_SELECTION)
#define SELECT_IOR u8_encode_bits(0x2, REGISTER_SELECTION)
#define SELECT_IDR u8_encode_bits(0x3, REGISTER_SELECTION)