• State TI Thinks Resolved
  • Locked Locked
  • Replies 3 replies
  • Answers 1 answer
  • Subscribers 32 subscribers
  • Views 142 views
  • Users 0 members are here
Support feedback
Options
Options
Similar topics

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

DP83867ERGZ-S-EVM: DP83867ERGZ-S-EVM

Nilima Chandratre
Prodigy 20 points
Part Number: DP83867ERGZ-S-EVM

DP83867ERGZ-S-EVM is interfaced with switch's MAC using SIN+/- , SOUT+/- SGMII lines. The EVM RJ45 connector is connected to Router.When I am checking the logs on the MAC side,it shows no connection.

There is no activity LED on the developemnt board.

Does the board is configured as SGMII to copper at power up?

To work it in this mode,I am not using CLK signals. DOes the board require any register configurations through MDIO?

  • 0
    TI__Mastermind 27905 points

    Hello,

    The PHY should be configured automatically to SGMII. The activity LED on the board is actually for MDI activity. While register configurations arent needed, MDIO might be extremely helpful to see what is going on in the SGMII register (0x37[1:0]). Please note that this register is outside of normal register field, so extended register read (outlined in datasheet) is needed.

    SGMII Clock is optional, not required.

    What is the cables you are using to connect SGMII to MAC? How long are the cables? Are they length matched?

    Sincerely,

    Gerome

  • 0 in reply to Gerome Cacho
    Prodigy 20 points

    Hi Gerome! Thank you for your quick response!

    We are using SMA coaxial cables. The length of the cables is approx 20cm. The cable length is not exactly matched.

    We do not have any adapter to read the activity on the MDIO bus.

  • 0 in reply to Nilima Chandratre
    TI__Mastermind 27905 points

    Hello,

    20 cm is sufficient for SGMII, however the cables must be length matched between positive and negative pairs for this communication to work. I would suggest obtaining different cables that would meet this requirement. If there is further debugging required, it would be recommended to have SMI connectivity to further debug the PHY.

    Sincerely,

    Gerome