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SPols's avatar
SPols
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5 years ago

Cyclone V GT Init/Config Issues

We have a custom FPGA board with the Cyclone V GT device. Part number 5CGTFD9EF35. What Happens: There is a rare issue that occurs where the device periodically goes through the init and config ...
Ash_R_Altera's avatar
Ash_R_Altera
Icon for Regular Contributor rankRegular Contributor
5 years ago

Hi Stephen,


The problems you had mentioned can occur due to improper terminations on the board.

Please check if the board connections are as per the Cyclone V Pin Connection Guildelines: https://www.intel.com/content/dam/www/programmable/us/en/pdfs/literature/dp/cyclone-v/pcg-01014.pdf


Also check recommendations in the following Knowledge base:

https://www.intel.com/content/www/us/en/programmable/support/support-resources/knowledge-base/solutions/rd03312011_647.html


Please let us know your observations.


Regards.



SPols's avatar
SPols
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5 years ago

Hi Ash,

We found several instances of incorrect termination of the related pins in the document you linked to. After correcting these, the severity of the issue may have been marginally reduced but it is not eliminated completely.

We have been trying different configuration settings and different configuration devices with no luck. The longer the board is powered, the worse this issue gets. Not only does the issue happen more frequently over time, but the amount of time it spends trying to configure increases as well.

The duration of the time spent trying to config is also very random. Ranging from 1 to 40 seconds.

Do you happen to have any more insights or data points we could get?

Thanks