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Altera_Forum's avatar
Altera_Forum
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13 years ago

Warning (169174): The Reserve All Unused Pins setting has not been specified

Hi, I am getting this annoying warning when my design is compiled: Warning (169174): The Reserve All Unused Pins setting has not been specified, and will default to 'As output driving ground'. ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

It can actually be a good idea to use this setting, if those pins are also connected to ground on your PCB, as it can help reduce ground bounce. Now I'm non really sure on how much it helps, and if the effect is measurable, but it can't do anything wrong!

As you said though, you should make sure that those pins are indeed not externally connected to something else than ground, or bad things can happen.