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RM57L843: Programming while asserting nRST

Barrett Bryan
Intellectual 1010 points
Part Number: RM57L843


Is there a way to configure the hercules such that reprogramming can occur while an external watchdog circuit is asserting the nRST pin?

  • 0
    TI__Guru* 84565 points

    Hi Barrett

    Have assigned this to Hercules subject matter expert and also will be looping in an emulation expert.

    Regards

    Mukul 

  • 0 in reply to Mukul Bhatnagar
    TI__Mastermind 49120 points

    Hi Barrett,

    A warm reset driven from an external circuit also causes the CPU to be reset, thereby not allowing the Flash memory to be programmed or erased using a JTAG based tool. If this is a requirement, the customer needs to explore how to lengthen the watchdog timeout period, or identify another mechanism to prevent the external circuit from asserting the warm reset.

    Can you send me more information about the watchdog circuit? You can email this to me internally and not upload it to e2e.

    Regards,

    Sunil

  • 0 in reply to Sunil Oak
    TI__Mastermind 49120 points

    Hi Barrett,

    I presume this is closed per our email exchange. The solution is to disable the external watchdog without any MCU control so that flash operations can occur. Please let me know if you have any questions about the options provided.

    Regards,

    Sunil