REG_DAT
return (nct_get_pin_reg(sc, REG_DAT, pin_num));
val = nct_get_pin_reg(sc, REG_DAT, pin_num);
sc->cache.out[gp->grpnum] = nct_read_reg(sc, REG_DAT, gp->grpnum);
case REG_DAT: return ("data");
nct_write_reg(sc, REG_DAT, group, sc->cache.out[group]);