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DP83822I: LINK Issue

Kenji Hayashi
Prodigy 35 points
Part Number: DP83822I
I am using DP83822.
Sometimes the link does not work when the power is turned on.
The registers for linking and not linking are attached.
Please tell me the cause.
PHY register.xlsx
  • 0
    TI__Genius 11725 points

    Hi Kenji-san,

    The register dump tells me that in the cases with no link, the link partner does not show auto-negotiation capabilities (registers 0x0005 and 0x0006). 

    Can you clarify how you are powering the device? The table suggests that you are supplying the device with 3.3V but detecting 1.8V. Am I correct to assume this refers to the VDDIO rails? How are you detecting 1.8V?

    I believe I am already in contact with Motoyasu-san from your team. For better continuity, we may continue this discussion via email. 

    Thank you,

    Nikhil

  • 0 in reply to Nikhil Menon
    TI__Genius 11725 points

    Hi Kenji-san,

    I see you have opened a new thread in regards to this issue. For better continuity I will close this thread and continue the conversation here: https://e2e.ti.com/support/interface/f/138/t/881526.

    Thank you,

    Nikhil