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K21 secure storage

Question asked by Alex Schepps on Apr 23, 2015
Latest reply on Apr 28, 2015 by Alex Schepps

I have a customer who is using the K21 with the tamper protection.


They are at the point of wanting to use the K21 32 bytes of secure storage.

The data sheet says the minimum Vbat is 1.71V.  Is this the minimum to preserve the data in the 32 bytes?

What is the Vbat voltage to guarantee the 32 bytes of secure storage is cleared?


With the K21 unpowered except Vbat can a tamper event clear the 32 bytes?

Is the only way to clear the 32 bytes of secure storage to lower Vbat?


Thx for the help.