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Altera_Forum
Honored Contributor
16 years agoI don't see how it can work with Cyclone IV GX. CDR is only available for Gigabit receivers, they don't work at 324 MBps. Unlike Arria II GX, the device has no soft CDR for LVDS receivers.
Depending on the signal specification, it may be possible however to perform the clock recovery with a simplified soft CDR based on PLL dynamic phase shift with Cyclone III or IV. There's no Altera IP for it, but the feature is present by design. A Cyclone III SERDES has to be built in logic cells, so it's no problem to design it for an abitrary word length.