IG4_REG_DATA_CMD
c = (uint8_t)reg_read(sc, IG4_REG_DATA_CMD);
reg_write(sc, IG4_REG_DATA_CMD, IG4_DATA_STOP);
reg_write(sc, IG4_REG_DATA_CMD, last);
reg_write(sc, IG4_REG_DATA_CMD, last);
reg_write(sc, IG4_REG_DATA_CMD, last);
reg_write(sc, IG4_REG_DATA_CMD, last);
reg_write(sc, IG4_REG_DATA_CMD, IG4_DATA_COMMAND_RD |
reg_write(sc, IG4_REG_DATA_CMD, cmd);
reg_write(sc, IG4_REG_DATA_CMD, IG4_DATA_COMMAND_RD);
(uint8_t)reg_read(sc, IG4_REG_DATA_CMD);