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DP83867CS: How to enhance RGMII signal

Cickey Xu
Intellectual 806 points

Part Number: DP83867CS

Dear Support team

please help how should i enhance RGMII signal ?

DP83867ISRGZ_RGMII&SGMII question .pdf 

  • 0
    TI__Mastermind 43555 points

    Hello,

    To answer your questions:

    - The RX_CLK looks to have significant signal integrity issues, but some of this can be brought on by measurement acquisition. Typically having a longer ground on the scope probe can cause distortion especially at high frequency signaling. We have also seen insufficient probing (low input range) also cause measurement issues. Before diving into debug, are you seeing application-related behaviors that are a byproduct of this?

    - RX_D3 looks to be cleaner, but having different issues SI-side from the scope grab. Is this also operating at 1G RGMII in the capture provided?

    - The SGMII doesn't look too bad from what was provided. Is there application issues here?

    Sincerely,

    Gerome