Forum Discussion
Altera_Forum
Honored Contributor
10 years ago --- Quote Start --- I have tried to set "as output driving ground" to all unused pins, but when I do it, the programmer tool fails to program my device. I can't quite understand whether unused pins, are all those pins that are assigned in pin planner but not wired on board, or those are pins that are not assigned in pin planner at all? I mean, I want to use pin as ordinary input but when I unplug connector to it, the pin value should be 0. And unfortunately there is no pull-down resistor. --- Quote End --- Unconnected pins are those not used by you (not wired internally) so the unused options don't apply to your case. You can apply '0' internally provided you have some switch tied up to the connector. when connector is in it drives the pin else it is driven internally by your logic.