50.8.4.2 Time-Triggered Mode

In Time-triggered mode, basic cycles can be split into several time windows. A basic cycle starts with a reference message. Each time a window is defined from the reference message, a transmit operation should occur within a predefined time window. A mailbox must not win the arbitration in a previous time window, and it must not be retried if the arbitration is lost in the time window.

Figure 50-20. Time-Triggered Principle

Time-triggered mode is enabled by setting the CAN_MR.TTM bit. In Time-triggered mode, as in Timestamp mode, the CAN_TIMESTP field captures the values of the internal counter, but the CAN_MSRx.MTIMESTAMP fields are not active and are read at 0.