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DP83867IS: Auto MDI-X support in Mirror mode

Part Number: DP83867IS

Hello, 

We want to use Mirror mode in 10/100 configuration. 

so, in this case, as mentioned in datasheet - A map with D and B map with C. 

We want to map - A with C and B with D. is this possible? 

is this Auto MDI-X applicable for mirror mode also? 

Thanks and Regards

Tarang Jindal

  • Hi Tarang,

    Auto-MDIX works in mirror mode, as well as forced MDI/MDI-X mode. I believe this will solve your connections needs.

    Best Regards,
    Rob

    Rob Rodrigues

    EFL (Ethernet & FPD Link) Applications Engineer

  • In reply to Rob Rodrigues:

    Hello Rob, 

    so, as per your statement, if we can  connect "PHY MDI pair C to RJ-45 pair A" and "PHY MDI pair D to RJ-45 pair B". the only thing we need to assure that the PHY should be configured in mirror mode. 

    I got confused from the datasheet statement in section 8.4.6.7 (attached snapshot). As with this statement in MDI and MDI-X both configuration A is map with D and B is mapped with C.  

    Please just reconfirm this. 

    Thanks and Regards

    Tarang Jindal

  • In reply to Tarang Jindal68:

    Hi Tarang,

    The table is slightly confusing in that it shows the connections of the drivers inside of the PHY only related to the port mirroring option.

    The MDI/MDIX mux is post port mirroring, and as such, channel A will still act as channel B when in MDIX mode.

    I think this section of the DS can be clarified and I will queue that change.

    Best Regards,

    Rob Rodrigues

    EFL (Ethernet & FPD Link) Applications Engineer