URE_PLA_RCR
rxmode = ure_read_4(un, URE_PLA_RCR, URE_MCU_TYPE_PLA);
ure_write_4(un, URE_PLA_RCR, URE_MCU_TYPE_PLA, rxmode);
rxmode = ure_read_4(un, URE_PLA_RCR, URE_MCU_TYPE_PLA);
ure_write_4(un, URE_PLA_RCR, URE_MCU_TYPE_PLA, rxmode);