URE_PLA_CPCR
cpcr = ure_read_2(sc, URE_PLA_CPCR, URE_MCU_TYPE_PLA);
ure_write_2(sc, URE_PLA_CPCR, URE_MCU_TYPE_PLA, cpcr);
URE_CLRBIT_2(sc, URE_PLA_CPCR, URE_MCU_TYPE_PLA, URE_CPCR_RX_VLAN);