DS1553_OFF_CONTROL
(*sc->sc_write)(dev, DS1553_OFF_CONTROL, control);
control = (*sc->sc_read)(dev, DS1553_OFF_CONTROL) | DS1553_BIT_WRITE;
(*sc->sc_write)(dev, DS1553_OFF_CONTROL, control);
(*sc->sc_write)(dev, DS1553_OFF_CONTROL, control);
control = (*sc->sc_read)(dev, DS1553_OFF_CONTROL) | DS1553_BIT_READ;
(*sc->sc_write)(dev, DS1553_OFF_CONTROL, control);