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AM625: Watchdog Funcnality

Aditya Singh
Intellectual 280 points
Part Number: AM625

Hi E2E Team,

After going through section 12.7.2.2.2 of AM625 TRM we came to below conclusion-

After enabling the DWD by software and writing the 12-bit preload value stored in register, if DWD Down Counter is decremented to 0 the AM625 will reset itself.

Please let us know in case of any discrepancy.

Regards,

Aditya

  • 0
    TI__Guru** 123628 points

    Hello Aditya,

    Thank you for the query.

    Please share some details on the development environment you are using.

    Regards,

    Sreenivasa

  • 0 in reply to Kallikuppa Sreenivasa
    Intellectual 280 points

    Hi Sreenivasa,

    Thanks for your response.

    We are analyzing weather we need external watchdog IC to reset the AM625 processor or it can be achieved using internal RTI digital watchdog in case application becomes unresponsive .

    As per AM625 TRM section 12.7.2.2.2 once DWD is enabled by software it will start counting down from preload value. The DWD preload resister can be configured at any time by the application according to the desired time-out period.

    Once application becomes unresponsive it will not reload the DWD resister and when counter reaches 0 it will reset the AM625 processor. Hence no need of external watchdog IC.

    Please let us know your thoughts on the same.

    Regards,

    Aditya

  • 0 in reply to Aditya Singh
    TI__Guru** 123628 points

    Hello Aditya

    Thank you for the inputs.

    Please note the performance provided by external reset and internal reset is not same.

    The external reset would ensure the watchdog availability and improve device performance.

    The above implementation could be an option but this is not going to be a same functionally and performance wise like using external reset.

    Regards,

    Sreenivasa

  • 0 in reply to Kallikuppa Sreenivasa
    TI__Guru** 123628 points

    Hello Aditya

    I have not heard from you and will close the thread for now.

    Please reopen the thread in case you have inputs or queries.

    Regards,

    Sreenivasa