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Altera_Forum
Honored Contributor
16 years agoVery interesting project do you have here...
I suppose the 3.3V are for powering out a DS card. In this case, as you have an already powered board, you can leave it unconnected. The GND pins should be connected, however, or you will have floating grounds. Check also the voltage levels of any I/O going from/to the FPGA when making pin assignments in Quartus.