[SOLVED] Erase a secured ATSAM device

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  • [SOLVED] Erase a secured ATSAM device

    Hi,


    I'm trying to flash a secured ATSAME51G19A using SWD. When I connect, I'm notified that the device is secured and that it needs to be unsecured
    using a mass erase of the internal flash. It seems to do something for a couple of minutes, repeating "Mass erase done!" but then fails at the
    end.

    I'm using a J-Link plus and J-Link 7.82c

    Is there another way I could unsecure the device to allow for flashing?

    There was a former post which is marked as [SOLVED], but i can't find the solution in it.

    [SOLVED] Erase a secured ateml SAMD device

    thanks and regards

    Michael

  • Hi Michael,
    We answered you via the the case you opened in the ticket system.

    For completeness the most important points:
    - The unsecure works fine on our side.
    - Please note that the unsecure is only possible, if the device can be mass erased via the DSU.
    - The device can NOT be unsecured if the mass erase was disabled via the CELCK command (NVMCTRL register).
    - It is the responsibility of the target application (user responsibility) to make sure that the device is in a state where the mass erase is not disabled.

    So, either you do have a way to make the application on the device issue the CEULCK command, thus re-enabling
    the mass erase via DSU, or the device cannot be unlocked and is "bricked".

    Regarding the J-Link Commander output:
    We will revisit the device specific connect of these devices and improve the output/functionality as follows:
    - The user will be notified in case mass erase is disabled.
    - A loop where "Mass erase done!" is printed again and again, even though it is clearly not will be prevented.

    BR
    Fabian
    Please read the forum rules before posting.

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