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a new 28335 cannot be unlocked

qiang wu 1
Prodigy 50 points


a new 28335,when I clicked the tool "Open F28xx on chip programmer", a dialog box said that:

the partid for this processor resides in a flash location that is currently locked

enter the flash code security password and press unlock to unlock the flash.

  • 0
    Guru 17055 points

    The error message is a typical message when the flash is locked or got locked.

    The following reasons could lead to the fact that the clear operation fails:

    - The  power  was not stable and therefore the clearing operation was stopped.

    - If you had set a breakpoint during previous debugging, it could happen that the flash APIs stop at this breakpoint and stopping the clearing operation.

    Please have a look to the Vcc pin to figure out if there is any instability on this pin.

    An other possibility would be to exchange the DSP by another one on your EVM to check if the issue still exists.

  • 0 回复 Forrest
    Guru 17055 points

    By the way ,below link may help you on this issue,please refer:

    bbs.eeworld.com.cn/thread-318121-1-1.html

  • 0
    TI__Genius 13420 points

    1. 检查电源，可能是电源的问题，特别是3.3V和1.8V引脚。

    1.8V的每个引脚要有1.2uf以上电容。

    2. 请确认购买渠道是TI正规代理商。