USS820_TXCON
temp = USS820_READ_1(sc, USS820_TXCON);
USS820_WRITE_1(sc, USS820_TXCON, temp);
USS820_WRITE_1(sc, USS820_TXCON, temp);
USS820_WRITE_1(sc, USS820_TXCON, temp);
temp = USS820_READ_1(sc, USS820_TXCON);
USS820_WRITE_1(sc, USS820_TXCON, temp);
USS820_WRITE_1(sc, USS820_TXCON, temp);