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MinzhiWang's avatar
MinzhiWang
Icon for Occasional Contributor rankOccasional Contributor
2 years ago
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Why do i get this error when I use lvds?

Hello guys, My device is 10CX220YF780E5G and the Quartus is QPP23.4. I implemented one channel LVDS receiver in my project. External PLL was checked. After full complilation, I found LVDS module was...
Generic Io
  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    1 year ago

    Hi,


    Yes, I found it in Volume 2, pages 4-18, from the link I provided earlier.

    Let me know if you can't find it.


    Regards,

    Aqid


AqidAyman_Altera's avatar
AqidAyman_Altera
Icon for Regular Contributor rankRegular Contributor
1 year ago

I also agree differential termination should be used, but it is up to you to figure out what is stable for your system. If you don’t use on-chip termination and it is working okay on this board, I can understand you may have concern for building a larger volume of boards and it continuing to be stable. It “should” work with on-chip differential termination.

Technically, the general purpose I/O pins do not support CML, that is typically a standard used with the transceivers with AC coupling.