Cyclone V active serial configuration w/ EPCS128 failure.

Thanks Pete.

I have looked at my DCLK, and there was some ringing on it. I was able to insert a termination resistor at the pin of the EPCS and that cleaned up the clock. I am still having the same problem though. I have tried several IC's and several boards to ensure that that was not the issue. It is consistent across all five of them. I tried adding both series and parallel capacitance to slow down the edges, but that just made it worse.

At this point, I am stumped.

Gavin