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Enabling tamper protection bit after having programmed non-volatile security key?

EmmaT
Beginner
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I have a Cyclone V device already programmed with a non-volatile key. I now want to set the tamper protection bit. I have tried programming a .ekp that sets the relevant bit but the operation failed (because a non-volatile key was already present on the device). Is there another way?

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YuanLi_S_Intel
Employee
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Hi,


Yes, non-volatile programming key is a one time programming only. I think there is no way to program the key already once non-volatile key is programmed.

https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/hb/cyclone-v/cv_5v2.pdf (Page 287)


Regards,

Bruce


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