625Chapter 15 Asynchronous Serial Interface C (UARTC)User’s Manual U16580EE3V1UD0015.4 Interrupt RequestsThe following three interrupt requests are generated from UARTCn.• Receive error interrupt (INTUCnRE)• Reception complete interrupt (INTUCnR)• Transmission enable interrupt (INTUCnT)The default priority for these three interrupt requests is highest for the receive error interrupt, followedby the reception complete interrupt, and the transmission enable interrupt.(1) Receive error interrupt (INTUCnRE)A receive error interrupt is generated when one or more of the three types of receive errors (parityerror, framing error, or overrun error) occur. (refer to 15.3 (6) UARTCn status register (UCnSTR))(2) Reception complete interrupt (INTUCnR)A reception complete interrupt is output when data is shifted into the UARTCn receive shiftregister and transferred to the UCnRX register in the reception enabled status.A reception complete interrupt will not be generated when a reception error has occurred.No reception complete interrupt is generated in the reception disabled status.(3) Transmission enable interrupt (INTUCnT)A transmission enable interrupt is generated when transmit data is transferred from the UCnTXregister to the UARTCn transmit shift register in the transmission enabled status.Table 15-2: Default Priorities of UARTCn InterruptsInterrupt PriorityReceive error (INTUCnRE) HighReception complete (INTUCnR) ↓Transmission enable (INTUCnT) Low
