MMS_DATA
bus_space_write_1(sc->sc_iot, sc->sc_ioh, MMS_DATA, 0x09);
bus_space_write_1(iot, ioh, MMS_DATA, 0x29);
status = bus_space_read_1(iot, ioh, MMS_DATA);
dx = bus_space_read_1(iot, ioh, MMS_DATA);
dy = bus_space_read_1(iot, ioh, MMS_DATA);
bus_space_write_1(iot, ioh, MMS_DATA, 0x09);