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Altera_Forum
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16 years ago

Is it possible to use same LVDS tx clock on different pins at same time?

I am playing with EP2C5T144 chip. I have two Cat5 cables to two slave devices. For my data I am using two LVDS pairs for data and one pair for transmit clock. As it is small device I am using same LV...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
16 years ago

This is probably a limitation of the soft LVDS Megafunction, that uses DDIO cells for both data and clock outputs for optimal performance. The DDIO cells are located inside the MegaFunction and the designer most likely didn't provide an option to duplicate them. A modfied soft LVDS logic would be needed. Basically you can build it yourself using DDIO primitives.