50.9.8 CAN Timestamp Register

This field carries the value of the internal CAN controller 16-bit timer value at the start or end of frame.

If CAN_MR.TEOF is cleared, the internal Timer Counter value is captured in the MTIMESTAMP field at each start of frame, else the value is captured at each end of frame. When the value is captured, the TSTP flag is set in CAN_SR. If the TSTP mask in CAN_IMR is set, an interrupt is generated while the TSTP flag is set. The TSTP flag is cleared by reading CAN_SR.