[ABANDONED] Failed to erase sectors @ address 0x0 (Algo91: Flash protection violation. Flash is write-protected.)

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  • [ABANDONED] Failed to erase sectors @ address 0x0 (Algo91: Flash protection violation. Flash is write-protected.)

    After flashing my NXP S32K144-Q100 (firmware: J-Link OpenSDA, built on 2019-05-27) with a program I accidentaly linked incorrectly, I'm no longer able to flash a program onto the board. Using your J-Link GDB Server V6.54c, `load` in gdb silently fails with `ERROR: Failed to erase sectors 0 @ address 0x00000000 (Algo91: Flash protection violation. Flash is write-protected.)`. Looking at the program flash protection (FPROT) registers I see

    Source Code

    1. J-Link>mem 408 4
    2. 00000408 = 0A F0 C3 F9
    where I expect to read `FF FF FF FF`. I tried with a

    Source Code

    1. J-Link>w4 408 FFFFFFFF
    which does not fail, but after a power cycle the registers still read `0A F0 C3 F9`.

    How do I unlock all flash regions again?

    Thanks in advance.
  • Hi,
    Thank you for your inquiry.

    Have you tried the FlashEraseAllUnsecure command?
    It is documented in the reference manual for this device.

    Best regards,
    Fabian
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