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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


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

OK, using the REFCLK_p0 is one step further. I can compile it now when I replace the xcvr_refclk input from the PLL to the REFCLK_p0 pin. I believe on the C5G starter kit board the REFCLK_p0 pin is fixed at 125MHz. The project however still does not work as intended. The signal going into the RX pin is not coming out the TX pin. Here is the newer updated QAR attached.

Here is a picture of the RTL viewer:

I had hooked the "Tx_dataout_valid" signal right back into the "tx_datain_valid" signal but I'm not sure if that is right.

Please help.