ATMEGA_UEINTX
temp = ATMEGA_READ_1(sc, ATMEGA_UEINTX);
ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, 0);
ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, ~ATMEGA_UEINTX_RXSTPI);
temp = ATMEGA_READ_1(sc, ATMEGA_UEINTX);
ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, ATMEGA_UEINTX_RXOUTI ^ 0xFF);
ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, ATMEGA_UEINTX_FIFOCON ^ 0xFF);
temp = ATMEGA_READ_1(sc, ATMEGA_UEINTX);
ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, 0xFF ^ ATMEGA_UEINTX_TXINI);
ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, 0xFF ^ ATMEGA_UEINTX_FIFOCON);
temp = ATMEGA_READ_1(sc, ATMEGA_UEINTX);