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DP83869HM: Bridging from SGMII to MII?

Andreas65932
Intellectual 280 points
Part Number: DP83869HM
Other Parts Discussed in Thread: DP83869EVM, DP83869

Hi!

Looking for a bridging / media-converter solution I found the DP83869HM.
I have a MAC that comes with SGMII and a special 10Mbps-PHY with MII.
Both parts, MAC and PHY, are mandatory and fixed, I cannot switch these interfaces (okay, for the PHY maybe I could switch to RMII).

I'd like to use the DP83869HM as a converter in a structure like this:

MAC with SGMII <-> DP83869HM <-> PHY with MII

Would that be possible?
How to configure registers and straps?
Does the DP83869EVM support this kind of application?

Thank you and best regards!

Andreas

  • 0
    TI__Genius 9920 points

    Hi Andreas,

    From your MAC to DP83869 you can transfer data via SGMII. However, with the PHY with MII, you would have to transfer data from the cable side or the MDI side and NOT MII. 

    Conversely, you can transfer data from PHY to PHY with MII but then that leaves you unable to connect to the MAC. 

    Hope that makes sense. Let me know if you need more clarity.

    Thanks,

    Cecilia