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Altera_Forum
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16 years ago

LVDS Tx drive strength and slew rate?

I'm trying to clean up some of my compilation warnings and one I don't quite understand is "Some pins have incompelete I/O assignments ..." When I go the "I/O Assignment Warnings" report, the only ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

There are no editable parameters for LVDS outputs. The "incomplete I/O assignments" warning is usually given together with these:

--- Quote Start ---

Warning: Pin "LVDS1" is a differential I/O pin but does not have its complement pin. Hence, fitter automatically created the complement pin "LVDS1(n)"

--- Quote End ---

The fitter reminds you to check, if you selected the correct (n) pins for differential pairs.