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Altera_Forum
Honored Contributor
Honored ContributorCyclone V LVDS differential termination
In the pin planner I specified input termination as differential for LVDS inputs. Do I need to specify for both positive and negative signals or just one? It seems to work both ways which bother...
Altera_ForumHonored Contributor
Honored ContributorSounds unlikely. Up to now, the basic method with differential I/O standards has been to assign the non-inverted pin and also specifiy additional I/O features for thi spin.
The pin planner tool is primarly a wrapper around the pin assignments, but does some things on it's own by e.g. displaying the inverted pins along with the (primarly assigned) non-inverted pins. In case of doubt, I would check the actual pin assignments, in assignment editor or *.qsf file.
