Programmable Devices
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VREFB pin is open! Is it possible?

schlee68
Beginner
544 Views

Hi Everyone

 

I recently changed jobs.
I received a schematic that was already made.
It's an Arria 10AX027H4 circuit, and there's something strange about it.
The VREFB pins are all open, and yet this board works fine.
This board uses only tx transceiver ip.

Is this possible?

 

Thanks!

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3 Replies
FvM
Valued Contributor III
524 Views

Pin connection guideline directs you to connect unused VREFB to GND or VCCIO. However, it doesn't tell if ignoring this rule prevents FPGA operation. I guess that increased current consumption may occur, don't know if even damage of the FPGA may happen.

If you plan a board redesign, you should definitely fix the point.

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Fakhrul
Employee
489 Views

Hi schlee68,


What has been said by FvM is correct. Nevertheless, you should follow the Intel® Arria® 10 GX, GT, and SX Device Family Pin provided by Intel.



Regrads,

Fakhrul


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Fakhrul
Employee
457 Views

Please be advised that due to the absence of a response from you regarding the previous notification we provided, we will be transitioning this thread to community support. If you have any new questions or concerns, we kindly suggest opening a new thread to receive assistance from Intel experts. However, if you do not have any further inquiries, the community users will be available to assist you on this thread. Thank you for your understanding.


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