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TerraX's avatar
TerraX
Icon for New Contributor rankNew Contributor
3 years ago
Solved

Cyclone V - Differential Pair Pin Assignment 1.5V PCML fitter error

When creating a new Quartus project similar to a demo example, I am trying to place XCVR pins in a blank project and getting an error from the 1.5V PMCL differential pins (HSMC_GXB_RX_p0 and HSMC_GXB...
  • Kshitij_Intel's avatar
    Kshitij_Intel
    3 years ago

    Hi Terra,


    I have told you earlier, you cannot directly connect, Please design custom logic to reconstruct the word. First correct your design then try to compile.


    Thank you

    Kshitij Goel


Kshitij_Intel's avatar
Kshitij_Intel
Icon for Frequent Contributor rankFrequent Contributor
3 years ago

Hi,


Few question for you.


Q1. What are you feeding to TX as an input, there must be some initial value?

Q2. If there is how are you feeding it?


Even though you feed some constant value to the transmit, there is higher probability you will see the bit shift at the receiver. You need to reconstruct the word or design a word aligner in the FPGA fabric.


On top of everything, you should not try in this way of looping back.


Thank you

Kshitij Goel