Nexys Video override constraints for Vadj

[tommymc]

I am using the Nexys Video with my own custom FMC board that needs Vadj at 2.5V

I am using block design with the Digilent board file and I added XDC constraints file for the FMC connector but I am getting an IOSTANDARD conflict.

This is because the pin map from the Nexys Video board file sets the IOSTANDARD differently for switches and buttons which share the bank powered with Vadj.

What is the best way to resolve this conflict?  Do I need to move the buttons and switches over to my own constraints? (Digilent board IP won't match then)

Can I somehow override the IOSTANDARD constraint but keep the Digilent board file IP and pin map?

[Bianca]

Hi @tommymc,

If you want to use VADJ at 2.5 you have to change the IOSTANDARD to LVCMOS25, for everything in that bank, in the XDC file.

Best regards,

Bianca