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Original question:

TP5010 Startup- RSTn

TPL5010: Watchdog issue with Done held low

John Shen1
Prodigy 60 points
Part Number: TPL5010

We have TPL5010 Done pin connected to MCU 430. This MR pin of the watchdog is connected to a 10k Ohm resistor, which corresponds to 8s reset time. The Done pin is held low all the time.  In this case the RST pin of the  watchdog  outputs a periodic signal with a period of about 8s. However after a day we saw the period drifted away and eventually the RST signal is gone, becoming flat.

Could you please let us know how to solve this issue?

Regards

John

  • 0
    TI__Mastermind 28550 points

    Hello,

    How many devices to you see this on?

    When you say the period drifted away, did it slowly increase from 8 second to 10 seconds to 12 seconds, etc.?

    When the RST became flat, was it constantly high or low?

    Can you advise the state of the WAKE pin during this state/as the period of nRST drifts away?

    73,
    Timothy