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  • [ABANDONED] Atmel SAMD21E16B lockup in STANDBY mode: What does "could not power-up debug port" mean?

    pieterc - - J-Link/Flasher related

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    Hi there! I am trying to debug a very tricky problem. Under rare circumstances the Atmel SAMD21E16B locks up and does not want to wake up from STANDBY sleep mode from an external interrupt source. It does not look like any code is executed, not even the interrupt handler code, because I toggle a debug pin in the interrupt handlers and the main code. I tried debugging using a J-Link, but I get the following error message: "Error: SAMD (connect): Could not power-up debug port". It does report howe…