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1. Set the VCCIO jumper to 2.5V to allow LVDS constraint on the HSMC pins.
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I was reading the tutorial that came along with the software; I thought the input signals should be 1.5V (both digital and analog), so I set everything to 1.5V. Only the analog signals are 1.5V. I have changed the jumpers to 2.5V again.
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2. Manually solder the 100-ohm terminations onto the board.
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I am fearful of soldering anything to the FPGA because it may be used for many other projects. My pin planner looks like garbage. I think there are 3 levels of (n)s. However, the darn thing works. I tested the speeds up to 50 MHz in (300 MHz out) and without using termination, the signals appear to arrive at the FPGA correctly. After the code is complete I will do extensive testing, and if we require 100 Ohm resistors, we will (painfully) attach them.
Again, thank you for your help. I don't know how it's working, like I said pin planner looks like garbage. But it is. Moving on. Not touching it.
-Joe
Honored Contributor
