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Does Secure Mode/Secure User Memory prevent debugger connection under reset?

Pavel A.
Evangelist III

I'm going to play with "Secure User Memory" and RSS feature (explained here) on STM32H753 ,and wonder if it is possible to reset the secure mode using debugger.

Of course, unless RDP level 2 is active.

Is there a window of time after power-up for a debugger to break in and do full erase of the MCU, or the secure mode will disable debugger interface immediately?

-- pa

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