Generate LVDS diff pair output

I suggest you read up on the ALTLVDS_TX module, details of which can be found here: lvds serdes transmitter/receiver (http://www.altera.com/literature/ug/ug_altlvds.pdf)

It's a very comprehensive document and, perhaps, a little daunting. So, I'll draw your attention to the deserialization factor discussed on page 3. Valid input clock rates are briefly discussed on page 4 and in more detail further into the document.

Alternatively, if you simply want and LVDS compliant pin pair, you can simply specify this in the pin planner. You need only use the ALTLVDS_TX megafunction if you need the deserialization facility.

Regards,

Alex