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Altera_Forum
Honored Contributor
Honored ContributorCyclone III LVDS
I'm designing with LVDS for the first time and want to make sure I don't overlook something simple. It looks like 2.5V VCCIO is mandatory. The EP3C5 pinout document tells me which pins can be LVDS....
Altera_ForumHonored Contributor
Honored ContributorThe best way is to assign all your pins and their io standards then run analysis tool to check your early pin planning. You don't need logic but you must define pin direction and may insert dummy logic e.g. inputs driving outputs. You better insert all your PLLs and any IP cores needed for io(DDR, tranceivers...).
devices differ and some pins support input lvds but not output or the reverse. some plls favour specific clock pins. some diff pins support specific types of voltages...
