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Altera_Forum
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12 years ago

LVDS_TX no output

Hi, I have a problem with the mega function LVDS_TX. Nothing is coming out of it! I check with SignalTap the "in" signal and they are good. It's for a DAC3282. I have 32 bit input,...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
12 years ago

I tried with and without the external PLL, same result.

SignalTap show me all the signal correctly (also the other clock from the PLL), all exept the signals going out of the LVDS_TX.

I also tried with the megafunction DDIO.

The LVDS pin should be ok as I have Dataclkp/n and framep/n generated by a PLL. (read with a external oscilloscope).

And if I put the output of a fifo on the 8 pin of the LVDS, I have something.

I should miss something with this LVDS_TX.