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K21 Tamper question from AN4733

Question asked by Alex Schepps on Jun 5, 2015
Latest reply on Jun 14, 2015 by Kan_Li

Looking at AN4733 figure 1, it looks like the Tamper inputs are in the VBAT power domain but I don’t see a path to clear the key.  It doesn’t look like the tamper
pins can erase the key.  Are these pins only useful if main power is on?