ATMEGA_UEINTX_FIFOCON
if (!(temp & (ATMEGA_UEINTX_FIFOCON |
ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, ATMEGA_UEINTX_FIFOCON ^ 0xFF);
ATMEGA_WRITE_1(sc, ATMEGA_UEINTX, 0xFF ^ ATMEGA_UEINTX_FIFOCON);