CPLDs

[andrewpervez]

cool runner utility runs OK...Not able to load a different .jed file from this utility to cool runner cpld

[johndap]

My board won't program via JTAG unless I have the USB port plugged in AND power on J3. 

John D

[jheslip]

I assume the board you are referring to is the Diligent board?

There are the following ARs: http://www.xilinx.com/support/answers/39262.htm

http://www.xilinx.com/support/answers/40166.htm

http://www.xilinx.com/support/answers/44436.htm

If they do not help, bear in mind Digilent provide the support for this board, if you can provide more details on eh failure such as error messages etc..