USS820_MCSR
temp = USS820_READ_1(sc, USS820_MCSR);
USS820_WRITE_1(sc, USS820_MCSR,
temp = USS820_READ_1(sc, USS820_MCSR);
USS820_WRITE_1(sc, USS820_MCSR, temp);
temp = USS820_READ_1(sc, USS820_MCSR);
USS820_WRITE_1(sc, USS820_MCSR, temp);