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Interfacing 100BaseT and 1000BaseT ethernet Communication

Karthikeyan Kasi Vishwanathan
Expert 1265 points
Other Parts Discussed in Thread: TMS570LC4357

Hi TI,

I am using TMS570LC4357. With this Micro Controller I established 100BaseT ethernet communication. And my aim is to interface this 100BaseT ethernet node with 1000BaseT ethernet node. Whether this kind of interface is possible? Or else Should I compulsorily increase my TMS570LC4357 ethernet module to 1000BaseT so that both nodes can communicate further?

Please anybody guide me in this.

Thanks,

Regards,

Karthikeyan.K.

  • 0
    TI__Guru**** 197036 points

    Hi Karthikeyan,

    I don't think you can connect 100BaseT to 1000BaseT node. Cat 5 network cable has 4 pairs, 100BaseT only uses two paires signals (pin 1-2,3-6) to operate, but 1000BaseT requires all 4 pairs (1-2, 3-6, 4-5, 7-8). 100BaseT TX sends 2 different volatages: -1V, 0V, and+1V; but 1000BaseT uses 5 voltages: -1, -0.5, 0, +0.5, and +1V. 

    Regards,

    QJ