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Original question:

TMS570LC4357: DCAN Bit Error Detection to ESM

TMS570LC4357: Difference between CAN3 and CAN13?

Max Wittekind
Expert 1875 points
Part Number: TMS570LC4357

Hi experts,

The Safety Manual of TMS570LC4357 mentions CAN13 - Bit Error Detection and CAN3 - DCAN SRAM Data ECC.

(Q1) Is CAN13 referring to Bit1 Error and Bit0 Error? If that is the case, why does the Safety Manual mention that this needs to be enabled and configured?

Thank you and best regards,
Max

  • +1
    TI__Guru**** 197356 points

    Hi Max,

    DCAN13 is for bit 0 error and bit 1 error. 

    DCAN nodes which transmit a message to the CAN bus also monitor the bus and compare the transmitted level with the corresponding level on the CAN bus bit by bit. If the transmitted bit level differs from the the read back or monitored bus level, a Bit Error is signaled. (No bit error is raised during the arbitration process.)

    This monitoring feature is part of CAN error detection mechanism, and enabled by default.