PCPR_CLOCK_OFF
bus_space_write_2(iot, ioh, offset, d | PCPR_CLOCK_OFF);
bus_space_write_2(iot, ioh, offset, d | PCPR_CLOCK_OFF);
bus_space_write_2(iot, ioh, off, PCPR_CLOCK_OFF | wren | data);
bus_space_write_2(iot, ioh, off, PCPR_CLOCK_OFF | wren | data);
d |= PCPR_WREN_ON | PCPR_DATA_OFF | PCPR_CLOCK_OFF;
d |= PCPR_WREN_OFF | PCPR_DATA_OFF | PCPR_CLOCK_OFF;