Forum Discussion

BQi's avatar
BQi
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

What IO standard would be used for reference clock?

Cyclone V GX,

xvr is 1.2v LVPECL

what IO standard would be used the ref clk ? 2.5v lvds or 1.2v lvpecl?

1 Reply

  • CheepinC_altera's avatar
    CheepinC_altera
    Icon for Regular Contributor rankRegular Contributor
    5 years ago

    Hi,

    As I understand it, you have some inquiries on the support IO standard for CV XCVR refclk. For your information, you can choose either of 1.2 V PCML, 1.5 V PCML, 2.5 V PCML, Differential LVPECL, and LVDS IO standards. You may refer to the CV device datasheet -> "Reference Clock Specifications for GX, GT, SX, and ST Devices" section for more details.

    Note that you can use HCSL only for PCIe application.

    Please let me know if there is any concern. Thank you.

    Best regards,

    Chee Pin