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TCAN4550: The watchdog whether be impacted when GPO1, GPO2 is not connected

Eric Lai
Expert 4940 points
Part Number: TCAN4550

Hi Expert,

In customer's design, the GPO1, GPO2 of TCAN4550 is not connected.

The engineer is asking the impact of watchdog function?

Thanks

Eric

  • 0
    TI__Mastermind 32970 points

    Hi Eric,

    If they want to use the watchdog function, there are two ways of setting the trigger bit.  The GPIO1 pin can be configured to reset the timer on a rising or falling edge.  The other option is a SPI write to 0x0800[18].

    If the GPIO1 pin is not connected, and they want to use the watchdog function, they will have to use the SPI option for resetting the timer.

    Regards,

    Jonathan