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SN65HVD1040-Q1: Wake up based on message rate

John Fedak
Expert 6715 points
Part Number: SN65HVD1040-Q1
Other Parts Discussed in Thread: SN65HVD1040

Hi Team,

My customer is looking at the SN65HVD1040 and has a question around the wake-up side.

I was looking at TI’s SN65HVD1040 Low-Power CAN Bus Transceiver as a potential part [for our OBD2 Port Application]. (open to other possibilities)

Can this chip wake up from a threshold message rate?  There are some slow pace messages present at the port from door open/remote unlock/etc (that we would prefer to ignore) then considerably more traffic when the vehicle is actually keyed on and running (which we would want to take action on).


Regards,

~John

  • 0
    TI__Guru 59030 points
    Hey John,

    I've assigned this thread to one of our engineers however he is currently on business travel, please excuse any delay in getting back to you.

    Thanks,
    -Bobby
  • 0 in reply to BOBBY
    TI__Guru 69972 points
    John,

    The bus must be held dominant for 5us for the low-power bus monitor to register a bus wake-up. This equates to a speed of 200kHz, what kind of data rates is the customer considering for "slow pace" and when the vehicle is "actually keyed on and running"?

    Regards,