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Altera_Forum's avatar
Altera_Forum
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17 years ago

unused pins setting option in project settings

Could anybody point me to the documentation relating to the unused pins setting in the device and pin options of the project settings. My code started working when i changed the setting from the defa...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

To my opinion, the options are self-explanatory. Setting unused pins to output has a danger to short some signals, that are connected to optional inputs but not yet defined as pins. Input with weak pull-up or hold is a safe option.

The purpose of setting unused pins as outputs is mainly in providing additonal ground pins to reduce ground bounce, partiularly with large PQFP packages.