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PIC Burnout: Dumping Protected OTP Memory in Microchip PIC MCUs

  • An exploit named PIC Burnout allows for dumping the One Time Programming (OTP) memory in certain Microchip PIC MCUs with code protection enabled.
  • This exploit damages the memory contents, meaning only one attempt can likely be made to dump the OTP data before the memory is 'burned out'.
  • The exploit involves using excessively high programming voltage and duration to circumvent the scrambled OTP data, and requires multiple checks to ensure successful data readouts.
  • While this method can affect the entire flash bit column, it is harsh on memory cells and may take hours to obtain a good dump. Knowledge of the scrambling method used is also necessary.

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