Datasheet

932
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
• SLEEP: CAN controller in Low power Mode
0: CAN controller is not in low power mode.
1: CAN controller is in low power mode.
This flag is automatically reset when Low power mode is disabled
• WAKEUP: CAN controller is not in Low power Mode
0: CAN controller is in low power mode.
1: CAN controller is not in low power mode.
When a WAKEUP event occurs, the CAN controller is synchronized with the bus activity. Messages can be transmitted or
received. The CAN controller clock must be available when a WAKEUP event occurs. This flag is automatically reset when the
CAN Controller enters Low Power mode.
• TOVF: Timer Overflow
0: The timer has not rolled-over FFFFh to 0000h.
1: The timer rolls-over FFFFh to 0000h.
This flag is automatically cleared by reading CAN_SR register.
• TSTP Timestamp
0: No bus activity has been detected.
1: A start of frame or an end of frame has been detected (according to the TEOF field in the CAN_MR register).
This flag is automatically cleared by reading the CAN_SR register.
• CERR: Mailbox CRC Error
0: No CRC error occurred during a previous transfer.
1: A CRC error occurred during a previous transfer.
A CRC error has been detected during last reception.
This flag is automatically cleared by reading CAN_SR register.
• SERR: Mailbox Stuffing Error
0: No stuffing error occurred during a previous transfer.
1: A stuffing error occurred during a previous transfer.
A form error results from the detection of more than five consecutive bit with the same polarity.
This flag is automatically cleared by reading CAN_SR register.
• AERR: Acknowledgment Error
0: No acknowledgment error occurred during a previous transfer.
1: An acknowledgment error occurred during a previous transfer.
An acknowledgment error is detected when no detection of the dominant bit in the acknowledge slot occurs.
This flag is automatically cleared by reading CAN_SR register.
• FERR: Form Error
0: No form error occurred during a previous transfer
1: A form error occurred during a previous transfer
A form error results from violations on one or more of the fixed form of the following bit fields: