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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

Technically they aren't ground pins. But setting them as output driving ground connect them to the FPGA ground through a MOSFet. It is not as good as a real ground pin, but it can still help to decrease the total impedance (especially inductance) between the FPGA ground and the PCB ground plane, thus limiting the ground bounce.