When the CAN module transmits information onto its bus, it can also monitor the bus to ensure that the transmitted information is appearing as expected on the bus. If the expected values are not read back from the bus, the hardware can flag the error and signal an interrupt to the CPU. This feature must be enabled and configured in software.

LIN module supports detection of bit error condition. An error flag bit is set when there has been a bit error detected by the bit monitor in TED (TXRX Error Detector sub-module). A bit error indicates that a collision has happened on the LIN bus, for example, the bit value that is monitored is different from the bit value that is sent. When bit error is detected the transmission is aborted no later than the next byte