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Valued Contributor III
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How to connect unused GXB_TX pins in an ARRIA GX device

I am trying to figure out how to terminate unused GXB_TXp and GXB_TXn pins in an Arria V GX device. 

 

 

Thanks, 

Dan
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Valued Contributor III
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Dan - 

 

Have you read the Arria V pin connection guidelines? 

 

https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/dp/arria-v/pcg-01013.pdf 

 

This is a very important document for all families. It says to leave all unused GXB_TX pins floating. No need to terminate. 

 

Bob
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Valued Contributor III
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--- Quote Start ---  

Dan - 

 

Have you read the Arria V pin connection guidelines? 

 

https://www.altera.com/content/dam/altera-www/global/en_us/pdfs/literature/dp/arria-v/pcg-01013.pdf 

 

This is a very important document for all families. It says to leave all unused GXB_TX pins floating. No need to terminate. 

 

Bob 

--- Quote End ---  

 

 

Thank you for the response. 

Yes, I did read that document. 

 

It says "Leave all unused GXB_TXp pins floating", which seems to inply to float just the "p" pins. 

Hence my confusion. 

 

 

Dan
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Valued Contributor III
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--- Quote Start ---  

Thank you for the response. 

Yes, I did read that document. 

 

It says "Leave all unused GXB_TXp pins floating", which seems to inply to float just the "p" pins. 

Hence my confusion. 

 

 

Dan 

--- Quote End ---  

 

 

I see what you mean. It's a typo. Leave both pins floating. You should let Altera know about this. Check the PCG for Cyclone V, Arria 10, etc. They correctly say to leave both pins floating. 

 

Bob
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