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TM4C123GH6PM: secure software in microcontroller

Rich Birett
Prodigy 10 points
Part Number: TM4C123GH6PM

Is there a feature in the TM4C123GH6PM that will lock the code loaded in it so it cannot be downloaded and copied? ie fusable link that is controlled when it is programmed.

  • 0
    TI__Guru**** 191346 points

    Hi,

      Yes, please refer to the BOOTCFG register for detail. BOOTCFG is a non-volatile register. You can program the DBG1 and DBG0 bits to non-10 combinations and lock the debugger from JTAG access. Please bear in mind that this is irreversible meaning once programmed, the only way to unlock for debugger access is to first unlock the device which will mass-erase the flash to its factory setting.