ASC_IOP_CONFIG_LOW
#define ASC_GET_CHIP_CFG_LSW(iot, ioh) bus_space_read_2((iot), (ioh), ASC_IOP_CONFIG_LOW)
#define ASC_SET_CHIP_CFG_LSW(iot, ioh, data) bus_space_write_2((iot), (ioh), ASC_IOP_CONFIG_LOW, data)