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AM2634: PORz reset usage

Samuel G
Prodigy 50 points
Part Number: AM2634

Tool/software:

I am looking for the different reset sources available on this controller. I need a software-independent reset source for the external watchdog reset. The only option without software intervention seems to be PORz. Is it possible to use it in this way? Can anyone confirm this?

  • 0
    TI__Expert 4266 points

    Hello,

    Could you please confirm under what conditions you would want to assert this reset from the external watchdog? Warm Reset is also another software-independent reset source that can be used, so you can choose either PORz or Warm reset.

    Thanks,

    Sahana

  • 0 in reply to Sahana H G
    Prodigy 50 points

    Thanks for responding  , I want to use this watchdog reset in case of a software hang or unrecoverable condition. I believe a warm reset still requires modifying some register values to change certain default configurations for a reset request. What I want to confirm is whether it is possible to use PORz in this scenario. Will it cause any damage or other issues with the controller?

  • +1 in reply to Samuel G
    TI__Expert 4266 points

    No, PORz will not cause any damage or any other issues. Only point is to note that PORz performs a reset of all the logic in the controller (including memories), and initiates the Boot process again. You can go ahead with this approach if it is okay for you.

    The configuration needed for the Warm Reset can be done in the start of your Secondary Bootloader and/or application, so that it can also be asserted any time it is required. In case you want to retain your memories or other registers (which are only sensitive to PORz), you can use the Warm Reset pin.

    Please refer to chapter 6.3 in the device TRM for understanding the different resets present in the controller AM263x SitaraTm Microcontroller Technical Reference Manual (Rev. H) (ti.com).

    Thanks,

    Sahana

  • 0 in reply to Sahana H G
    Prodigy 50 points

    Thank you  , This resolved my query. I appreciate your quick response and support.