URE_PLA_TXFIFO_CTRL
ure_write_4(sc, URE_PLA_TXFIFO_CTRL, URE_MCU_TYPE_PLA, URE_TXFIFO_THR_NORMAL2);
ure_write_2(sc, URE_PLA_TXFIFO_CTRL, URE_MCU_TYPE_PLA, URE_TXFIFO_THR_NORMAL2);
ure_write_2(sc, URE_PLA_TXFIFO_CTRL, URE_MCU_TYPE_PLA, 0x0008);
ure_write_4(sc, URE_PLA_TXFIFO_CTRL, URE_MCU_TYPE_PLA,