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Honored Contributor
Honored ContributorStratix III LVDS OCT
Hello! I am using stratix III and I have a few questions about LVDS and OCT in stratix III and I/O buffers. 1. If we want to use dynamic termination, can we use differential mode? a. ...
Altera_ForumHonored Contributor
Honored ContributorHi,
I have been studying this area recently and so I am unsure as you are and hope the gurus will step in. Here are my views: 1) my understanding is that LVDS needs parallel 100 ohm at input only. It does not need anything else. Remember LVDS is one type of differential io standards. Since output drivers don't need termination with LVDS then you don't need to think of dynamic OCT. 2) Some other differential schemes use two single ended lines and need their own termination. I believe dynamic OCT applies here. 3) already answered. 4) the 14 bits are control words that are generated by altoct and fed into altiobuf. You can study altoct and altiobuf user guide examples. Both modules are used together as pair to do OCT with calibration or dynamic OCT
