S32K146-Get current key counter value

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S32K146-Get current key counter value

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sochoi
Contributor III

I want to get the counter value of the key currently stored in the security flash.

I checked the reference manual and documents explaining various CSE, flash memory, etc.

However, I couldn't find a way to get the key counter value.

I understand that key update can be executed only when the key counter value is known.

Please tell me how to get the current key counter value required for Key update.

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lukaszadrapa
NXP TechSupport
NXP TechSupport

Hi @sochoi 

It's not possible to read the counter value. This would violate SHE specification. It's up to user to track the counter values on application level.

Regards,

Lukas

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