11.6.11.2 Interrupt Status Register

The interrupt status register stores internal interrupt events. Once a bit is set, it remains set until it is cleared by writing 1 to it. The interrupt enable register has no effect on the interrupt status register. The following table provides INT_STATUS register bit descriptions. A pending interrupt indicates that its respective flag is set to 1. In order for an interrupt to be acknowledged, set its flag to 1.

Table 11-29. INT_STATUS
Bit Number	Name	Description
[31:16]	Reserved	Reserved
15	SST_FAILURE	Single-shot transmission failure 0: Normal operation 1: A buffer set for single-shot transmission experienced an arbitration loss or a bus error during transmission.
14	STUCK_AT_0	Stuck at dominant error 0: Normal operation 1: Indicates if receive (RX) input remains stuck at 0 (dominant level) for more than 11 consecutive bit times.
13	RTR_MSG	RTR auto-reply message sent 0: Normal operation 1: Indicates that a RTR auto-reply message was sent.
12	RX_MSG	Receive message available 0: Normal operation 1: Indicates a new message was successfully received and stored in a receive buffer which has its RxIntEbl flag asserted.
11	TX_MSG	Message transmitted 0: Normal operation 1: Indicates a message was successfully sent from a transmit buffer which has its TxIntEbl flag asserted.
10	RX_MSG_LOSS	Received message lost 0: Normal operation 1: Indicates a newly received message couldn't be stored because the target message buffer was full (for example, its MsgAv flag was set).
9	BUS_OFF	Bus Off 0: Normal operation 1: Indicates that the CAN controller entered the bus-off error state.
8	CRC_ERR	CRC error 0: Normal operation 1: Indicates that a CAN CRC error is detected.
7	FORM_ERR	Format error 0: Normal operation 1: Indicates that a CAN format error is detected.
6	ACK_ERR	Acknowledge error 0: Normal operation 1: Indicates that a CAN message acknowledgment error is detected.
5	STUFF_ERR	Bit stuffing error 0: Normal operation 1: Indicates that a CAN bit stuffing error is detected.
4	BIT_ERR	Bit error 0: Normal operation 1: Indicates that a CAN bit error is detected.
3	OVR_LOAD	Overload message detected 0: Normal operation 1: Indicates that a CAN overload message is detected.
2	ARB_LOSS	Arbitration loss 0: Normal operation 1: The message arbitration was lost while sending a message. The message transmission is retried once the CAN bus is idle again.
[1:0]	Reserved	Reserved