I am trying to replicate the project using AX7203 board with Artix-7 FPGA in it. It uses 200MHz differential clock. How to make MMCM module to take in differential clock and produce output ?

[kavyash15]

clk_mmcm_inst in the fpga.v has 2 clk_in in it (clk_in1, clk_in2). Are these differential pairs ?

[alexforencich]

No, they are so you can feed in two different clocks and pick which one you want the mmcm to use. For a differential input, you'll want an ibufgds. Some of the other example designs have a differential clock input with this setup, for example I think the ZCU102 and ZCU106.