Description
When Cyclone II dedicated clock input pins are configured for the LVDS or LVPECL I/O standard for input operations, the differential buffer is powered by VCCINT, not VCCIO. Thus, the VCCIO does not have to be 2.5V when you use LVDS or LVPECL I/O standards on the dedicated clock input pins for input operations.
Environment
BUILT IN - ARTICLE INTRO SECOND COMPONENT