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lambert_yu's avatar
lambert_yu
Icon for Contributor rankContributor
4 years ago
Solved

about xcvr_vccr_vcct_voltage set

Hi all,

I have one question:

if the Vccr_GXB = 1.07v, so the xcvr_vccr_vcct_voltage is 1_0V or 1_1V? Which one will be the best setting? If I set xcvr_vccr_vcct_voltage to 1_0V is okay? For data rate = 12Gbps, will I need to set xcvr_vccr_vcct_voltage to 1_1V?

FPGA TYPE : arria 10, 10ax115n2f45e1sg

Brs,

Lambert

  • Deshi_Intel's avatar
    Deshi_Intel
    4 years ago

    Welcome.


    So, if your on board power supply typical value is 1.03V and may fluctuate till max 1.06V/1.07v then maybe still fine but if your typical value is already 1.06v/1.07v then it's a bit high and out of recommended operation condition from Arria 10 datasheet.


5 Replies

  • Deshi_Intel's avatar
    Deshi_Intel
    Icon for Regular Contributor rankRegular Contributor
    4 years ago

    HI Lambert,


    FPGA TYPE : arria 10, 10ax115n2f45e1sg


    Quartus setting of 0.9V, 1.0V and 1.1V basically correspond to on board supply of 0.95V, 1.03V and 1.12V.

    • 1.1V/1.12V setting is only applicable to GT channel only while I presume you are using GX channel


    For GX channel, Transceiver speedgrade of 2, data rate = 12G,


    In general, you can always refer to A10 datasheet doc for the guidance of correct transceiver power supply to be used.


    Thanks.


    Regards,

    dlim



    • lambert_yu's avatar
      lambert_yu
      Icon for Contributor rankContributor
      4 years ago

      Hi dlim,

      Thanks for your help, just because I provide one very close value to 1.06v(maximum, 1.07v just because of the power accuracy adjustment). And from your information, I got the indication of 0_9v, 1_0v, 1_1v, thanks.

      Brs,

      Lambert

  • Deshi_Intel's avatar
    Deshi_Intel
    Icon for Regular Contributor rankRegular Contributor
    4 years ago

    Welcome.


    So, if your on board power supply typical value is 1.03V and may fluctuate till max 1.06V/1.07v then maybe still fine but if your typical value is already 1.06v/1.07v then it's a bit high and out of recommended operation condition from Arria 10 datasheet.