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Visitor railcannon
Visitor
76 Views
Registered: ‎04-17-2019

GTX RX pin grounded then RX_CM_SEL Floating or Ground?

Hello 

I have a single simple question about RX_CM_SEL 

I build FPGA PCB  with GTX RX pins directly tied to ground because I'm not using GTX RX pins.

Datasheet saids if a receiver is not used and not biased, connect the RX pin pair to ground.

 

Then what should I set the RX_CM_SEL to make not biased.

GND or FLOATING?

I think both are correct configuration.

Am I right?

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1 Reply
Xilinx Employee
Xilinx Employee
28 Views
Registered: ‎10-19-2011

Re: GTX RX pin grounded then RX_CM_SEL Floating or Ground?

Hi @railcannon ,

as you clearly do not want to use these inputs, do not instantiate anything on that location in your design. You do not need to set anything.

Please also have a look at AR71407.

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