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PBCAN's avatar
PBCAN
Icon for New Contributor rankNew Contributor
1 year ago

Power Sequencing of DK-SI-AGI027FA - FMC-B Connector

Hi,

I have a question regarding the Agilex 7 Development Kit (DK-SI-AGI027FA). Specifically, I need to confirm whether the +12V, +3.3V, and P1V2_IO (FMC_B_ADJ) power rails on the J9 (FMC-B) connector power up simultaneously.

I've reviewed the power tree and power sequence timing diagrams in the user guide (721605). However, I've noticed some inconsistencies between them:

  • According to the power tree and its color coding:

    • The FMC_B_12V rail becomes available during FPGA Power Group 3 stage (LTC4211).
    • The +3.3V@8.3A rail becomes available during FPGA Power Group 1 stage (LTC4365).
    • The P1V2_IO (FMC_B_ADJ) rail becomes available during FPGA Power Group 3 stage (LTM4677).

  • However, according to the power sequence timing diagram, the FMC_B_12V, P1V2_IO, and 3V3_Flash rails all become available during Group 3 stage.

I've attached .JPG files of both the power tree and the timing diagrams for your reference.

Additionally, could you clarify why the color of the FMC+ Card B matches the -1 Power Group stage?

I would greatly appreciate any assistance you can provide on this matter.

Thank you for your time and help.

Best regards,

Board Debug

2 Replies

  • NazrulNaim_Intel's avatar
    NazrulNaim_Intel
    Icon for Regular Contributor rankRegular Contributor
    1 year ago

    We sincerely apologize for the inconvenience caused by the delay in addressing your Forum queries. Due to an unexpected back-end issue in our system, your Forum cases, along with others, did not get through as intended. As a result, we have a backlog of cases that we are currently working through one by one.

    Please be assured that we are doing everything we can to resolve this issue as quickly as possible. However, this process will take some time, and we kindly ask for your patience and understanding during this period. The cases will be attended by AE shortly.

    We appreciate your patience and understanding, and we are committed to providing you with the best support possible.

    Thank you for your understanding.


  • Farabi's avatar
    Farabi
    Icon for Regular Contributor rankRegular Contributor
    1 year ago

    Hello,


    The power sequencing must follow GROUP 1 > GROUP 2 > GROUP 3. Otherwise the device will not boot up successfully.

    FMC connector powers only available during user mode.


    regards,

    Farabi