What should I do"CAN6","ETH6" ?

Hello Arriy,

The difference between the periodic check of DCAN SRAM and Ethernet SRAM content is different from the in message CRC in that the in message CRC is usually to cover issues during transmission and is handled by Hardware. The in message CRC generally covers the message when it is being received but not while it is already received and stored in the CAN or Ethernet SRAM/receive buffers. The periodic check of DCAN and Ethernet SRAM would only be effective if there was sufficient enough time to check the SRAM content before other messages are received or if it only is used to check the static portion of the SRAM message buffers. This could, for example be used to check a block of messages that come in periodically where there is time to calculate the updated CRC and then again when the data is to be used. The intent of the CAN6 and ETH6 diagnostic measures are to catch potential transient or permanent faults in the SRAMs. Note that the DCAN SRAM is protected by Parity which would be a much more effective measure than the CRC check.