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TCAN4550-Q1: What pins are necessary?

Roy Hsu
Genius 9390 points
Part Number: TCAN4550-Q1

Hi Team,

Could you advise the highlighted pins are required or not? Customer would like to know if they can save some pins if those are optional.

Thanks!

Roy

  • 0
    TI__Guru 74282 points

    Roy,

    Thanks for bringing this question to E2E.

    GPIO1 and GPO2 are not required pins and can be left floating, this is the same for nWKRQ. nWKRQ is a logic-level signal that indicates a wake-up request has been received by the CAN transceiver, so while it is not required, it is a very useful function.

    Technically nINT is not required, but it is a fairly important pin as it notifies the MCU when any interrupt is asserted. This is important because it can be used to detect any errors/faults, but also notify the MCU when a new CAN message has been received, plus many other important device updates. The other option is polling the interrupt registers which may be taxing to the overall software throughput.

    RST is not required to be used but it is not recommended to leave this floating. I would recommend connecting this to the MCU to be monitored or connecting it to ground.

    Please let me know if you have any other questions.

    Regards,