Forum Discussion

dncmrc1's avatar
dncmrc1
Icon for New Contributor rankNew Contributor
1 month ago
Solved

Agilex 7 slew rate reconfiguration

We need to change dynamically (reconfigure) the transceiver TX slew rate.

How can that be done?

 

Transceiver
  • CheepinC_altera's avatar
    CheepinC_altera
    30 days ago

    Hi,

     

    For configuring TX Equalization on the Agilex™ 7 FGT PMA, you can use register 0x47830, which controls the TX EQ parameters. You may also refer to the proc set_txeq_settings procedure in the file ttk_helper_ftile_9_25.tcl, as it provides an example of how these settings are applied.

     

    Feel free to let me know if you have any further questions. Thank you.

10 Replies

  • dncmrc1's avatar
    dncmrc1
    Icon for New Contributor rankNew Contributor
    1 month ago

    Hi,

    I am referring to L_ and H-tiles, not F.

    We are already reconfiguring pre-emphasis and VOD, no issue with them.

    What I am asking here is about TX slew rate. We are already doing that with e.g. Arria 10 but now we need to do it also with Agilex 7. I am pretty sure there must be there as well a register for reconfiguring it.

    Regards

    • CheepinC_altera's avatar
      CheepinC_altera
      Icon for Regular Contributor rankRegular Contributor
      1 month ago

       

      Hi,

       

      Thanks for the update. From your description, I understand you are referring to L/H tiles. Could you please confirm if you are talking about Stratix 10 devices, which support L/H tiles?

       

      Thank you.

      • dncmrc1's avatar
        dncmrc1
        Icon for New Contributor rankNew Contributor
        1 month ago

        Hi,

         

        Sorry, my bad. I am referring to F-tiles and Agilex 7.

        I got confused since I have another issue related to Stratix 10 and L/H tile.

        But this issue is indeed referring to F-tiles and Agilex 7, sorry.

        Regards

  • CheepinC_altera's avatar
    CheepinC_altera
    Icon for Regular Contributor rankRegular Contributor
    1 month ago

    Hi,

     

    From your inquiry, I understand that you are looking into reconfiguring the TX slew rate for the Agilex 7 XCVR. Please correct me if my assumption is incorrect, but I am presuming you are referring to the F‑tile transceiver.

     

    For your information, after reviewing the F‑Tile Architecture and PMA and FEC Direct PHY IP User Guide, I was not able to locate any specific info or configurable parameters related to TX slew‑rate control. Could you confirm whether you are instead referring to other PMA analog settings, such as TX pre‑emphasis?

     

    Please let me know if you have any concerns or if you can share more context about your requirement. Thank you.

    • CheepinC_altera's avatar
      CheepinC_altera
      Icon for Regular Contributor rankRegular Contributor
      1 month ago

      Hi,

       

      Thanks for your clarification that you are referring to F-tile. As per my previous note, there is no configurable parameters related to TX slew‑rate control. Could you confirm whether you are instead referring to other PMA analog settings, such as TX pre‑emphasis? Thank you.

      • dncmrc1's avatar
        dncmrc1
        Icon for New Contributor rankNew Contributor
        1 month ago

        Hi,

        I meant namely the slew rate. But we will need to change also some other of the PMA settings (like pre-emphasis, yes).  Can you please provide a list of the registers where these parameters can be reconfigured?

  • CheepinC_altera's avatar
    CheepinC_altera
    Icon for Regular Contributor rankRegular Contributor
    1 month ago

    Hi,

     

    Thank you for filing this case and sharing the details. I appreciate your patience. Please allow me some time to review the information, and I’ll get back to you as soon as possible.