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Altera_Forum's avatar
Altera_Forum
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8 years ago

Quartus 2 and .LVDS

I have an easy question for one of the experts. I am using Quartus 2 13.1 and trying to program a Terasic DE3. This is the board with the 4 HSTC connectors, connected to the pads that support LVD...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

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You did everything correctly. The available termination options for LVDS input are "differential" or no termination. Differential is 100 ohm.

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Thanks. But how come for some pins I select LVDS as the I/O Standard but the termination options do not include “Dofferential”? They only include the others as detailed above? Under what circumstances does the tool do this?

thanks again!