SH7052 Datasheet, PDF (570/919 Pages) Renesas Technology Corp – SuperHTM RISC engine

However, a transmit wait message cannot be canceled at the following times:
a. During internal arbitration or CAN bus arbitration
b. During data frame or remote frame transmission
Also, transmission cannot be canceled by clearing the transmit wait register (TXPR). Figure
15.8 shows a flowchart of transmit message cancellation.
4. Message retransmission
If transmission of a transmit message is aborted in the following cases, the message is
retransmitted automatically:
a. CAN bus arbitration failure (failure to acquire the bus)
b. Error during transmission (bit error, stuff error, CRC error, frame error, ACK error)
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