RT_DATA_OFF
sc->lm.wzcl = RT_WREN_ON | RT_CLCK_OFF | RT_DATA_OFF;
sc->lm.wzch = RT_WREN_ON | RT_CLCK_ON | RT_DATA_OFF;
sc.lm.wzcl = RT_WREN_ON | RT_CLCK_OFF | RT_DATA_OFF;
sc.lm.wzch = RT_WREN_ON | RT_CLCK_ON | RT_DATA_OFF;