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Current consumption during the secured key and encrypted data programming

Pero_K
Beginner
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Hello,

 

on my Arria 10 GX board, I am experiencing a strange issue: during the secure key programming (volatile) or during the encrypted configuration data programming, the voltage at IO supply (1.8V) glitches for a couple of milliseconds for cca 120mV and power manager triggers a shutdown.

 

The power delivery was designed based off the EPE and we had no issues running the non-encrypted data. Actually, we managed to run the non-ecrypted FW that was way beyond the EPE. However, during the secured design implementation, the whole thing becomes quite unstable. 

 

We are using the AS configuration scheme, with x4 datawidth.

 

What could be the reason for this? What could be the solution?

 

Best regards, 

 

P.

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