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FMCADC2 - Changing polarity of JESD204B receive transceivers

Question asked by MalcolmC on Nov 16, 2016
Latest reply on Nov 18, 2016 by MalcolmC

We are currently using the FMCADC2 reference design and are starting to use it on a new base card of our own design.  For routing purposes the differential lines for each JESD204B rx pair have been reversed.

 

Xilinx indicates that the polarity of the GT transceivers can be changed in HW (eg. Verilog), however I can't figure out which of the following blocks such a change would be made in:  util_ad9625_gt, axi_9625_gt or axi_ad9625_jesd

 

Any help would be appreciated.

 

Note - I think the polarity can also be changed in SW, but it doesn't look like the ADI driver supports this.

 

Thanks!

 

Malcolm

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