Reprogram the flash protection keys on TMS470

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The TMS470 devices flash memory is protected from unauthorized erasures or writes with the four 32-bit protection keys. The flash protection keys are modified by writing to the last four words of the first sector in flash.

The process flow is:

  1. The flash must be unlocked by matching the protection keys.
  2. The flash protection keys are modified by writing to the flash protection key locations in flash.

Please refer to the document for more information related the process flow involved to reprogram the flash protection keys.


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