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TCAN4550-Q1: RST, GPIO1, GPIO2, INH, NINT and NWKRQ unused

Ue
Genius 16475 points
Part Number: TCAN4550-Q1

Hi all

My customer has a design with the TCAN4550-Q1 and is not using the RST, GPIO1, GPIO2, INH, NINT and NWKRQ pins.

Can they leave these pins open / floating ?

Best regards

Ueli

  • 0
    TI__Guru 65932 points

    Ueli,

    All of these pins can technically be left floating, but I'd recommend connecting RST to GND if it is truly not being used to avoid any unwanted device resets from noise coupling to the pin. 

    How is the customer using this device? RST, INH and nINT are fairly crucial in using this device for CAN communication and state recognition. nINT specifically will indicate any interrupts that are asserted due to sending/receiving CAN frames, so if they aren't using this pin, how exactly are they monitoring the reception and transmission of CAN messages? Just through polling the registers?

    Regards,

    Eric Hackett 

  • 0 in reply to Eric Hackett
    TI__Genius 16475 points

    Eric

    Thank you for the quick reply / clarification.

    I will check with the customer as to the specific use case.

    Best regards

    Ueli

  • 0 in reply to Ue
    TI__Guru 65932 points

    Ueli,

    I received your email and responded, thanks for reaching out and following up. I'll be closing this thread for now.

    Regards,

    Eric Hackett