38.11.5 Interrupt Flags

Table 1-13 summarizes all interrupt flags and lists how interrupts are cleared.

Table 38-13. Interrupt Flags
Flags Registers Categories Cleared by Module(1) Cleared by Application Read-Only(2) Description
RFFIF, RFHIF, RFNIF CxFIFOSTAy FIFO X - - RX FIFO
TFNIF, TFHIF, TFEIF CxFIFOSTAy FIFO X - - TX FIFO
TXQNIF, TXQEIF CxTXQSTA TXQ X - - Transmit Queue
RXOVIF CxFIFOSTAy FIFO - X - RX Overrun
TXATIF CxFIFOSTAy, CxTXQSTA FIFO, TXQ - X - TX Attempt
TEFFIF, TEFHIF, TEFNEIF CxTEFSTA FIFO X - - TEF
TEFOVIF CxTEFSTA FIFO - X - TEF Overrun
RFIF[3:1] CxRXIF Combined - - X All RX FIFOs
TFIF[3:1] CxTXIF Combined - - X All TX FIFOs
RFOVIF[3:1] CxRXOVIF Combined - - X All RX FIFO Overruns
TFATIF[3:0] CxTXATIF Combined - - X All TX FIFO Attempts
RXIF CxINT Main - - X RX
TXIF CxINT Main - - X TX
RXOVIF CxINT Main - - X RX Overrun
TXATIF CxINT Main - - X TX Attempt
TEFIF CxINT Main - - X TEF
IVMIF CxINT Main - X - Invalid Message
WAKIF CxINT Main - X - Wake-up
CERRIF CxINT Main - X - CAN Bus Error
MODIF CxINT Main - X - Mode Change
TBCIF CxINT Main - X - Time Base Counter
SERRIF CxINT Main - X - System Error
Note:
  1. The flags will be cleared when the condition of the FIFO terminates, initiated by the UINC bit (CxFIFOCONy[8]).
  2. The flags need to be cleared in the preceding hierarchies.