K21 Tamper question from AN4733

[PHXFAE]

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?

[Kan_Li]

Hi Alex,

I just got the feedback, the expert told me there is some issue for Figure 1, which is not complete/accurate, but she assured me that the tamper inputs are connected to the key erase logic.

Hope that helps,

Have a great day,
Kan

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[Kan_Li]

Hi Alex,

I am checking with the DryIce expert, and will let you known when I have any more information.

Thanks for your patience!

Have a great day,
Kan