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Original question:

DP83TG720S-Q1: PHY Comm direct without MCU?

DP83TG720S-Q1: DP83TG720S-Q1 direct comm

Chen Alex1
Expert 2055 points
Part Number: DP83TG720S-Q1

HI sir

We design a circuit , DP83TG720S-Q1 direct comm as below, but comm still fail. did you have any suggestion?

thanks

  • 0
    TI__Genius 17355 points

    Hi Alex,

    I need a clarification on how do you connect 720 PHYs to the RJ45 wire because 720 PHYs does not support RJ45 cable. Did you used a media converter?

    --

    Regards,

    Hillman Lin

  • 0
    Prodigy 10 points

    Hi Hillman,

    We connect DP83848CVV to 720 PHY on our PCBA, so one side is "RJ45" from DP83848CVV usage, the other side is automotive 1000BASE-T1 (TRD_M/P) from 720PHY.

    We set one PCBA as a master, the other is a slave, then connect Master's TRD_M/P to Slave's TRD_M/P.  If this connection is acceptable, we use 2 PC like above fig., set the IP properly, it should be possible to ping each others.

    Thank you.

  • 0 in reply to Jyun-yu Chen
    TI__Genius 17355 points

    Hi Chen,

    • Have you test the link up with two 720 PHYs only?
    • Have you also try the link up between PC and 848 PHY only?

    --

    Regards,

    Hillman Lin