Spartan-6 GTP bypass

[sharifanali]

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?

[austin]

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

[sharifanali]

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.