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sharifanali
Visitor
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Registered: ‎06-18-2013

Spartan-6 GTP bypass

Is there any way to bypass the GTP receiver and get the serial input signal on the fgpa interface?

I have a serial signal with 125MHz bitrate which goes to MGTRXP/N pins, I want to receive this signal at my FPGA interfaece without any deserialization. Is there any settings in the GTP to accomplish that?

 

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austin
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Registered: ‎02-27-2008

s,

 

I do not think so.  If you wired it to the wrong pins, you may need to change your design.

 

You could over-sample.  Running the GTP at a multiple of the input rate allows you to recover the clock and data, but you have to undo the orver-sampling.

 

xapp224

 

http://www.google.com/url?sa=t&rct=j&q=xapp%20224&source=web&cd=1&cad=rja&ved=0CCwQFjAA&url=http%3A%2F%2Fepp.fnal.gov%2FDocDB%2F0002%2F000227%2F001%2Fxapp224.pdf&ei=0H7AUfimIYTiiALxyoDIBQ&usg=AFQjCNFlj2zX2rvw__PxdSQDD3Q9ur5oBA&bvm=bv.47883778,d.cGE

 

 

Austin Lesea
Principal Engineer
Xilinx San Jose
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sharifanali
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Registered: ‎06-18-2013

Thanks for the app note Austin. Its actually not a mistake. I have designed a board which receives 3G video signal on BNC and it utilizes GTP to deserialize that signal and it works fine. I am just researching the possibility of receiving a MADI signal (125MHz) on the same BNC. I guess I should start looking into oversampling.

by any chance do you know any ap note for MADI? I couldn't find any on the website.

 

Thanks anyways.

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