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Query regarding the DP83640 PHY

Other Parts Discussed in Thread: DP83640

Hi

Currently in our Zynq FPGA, 2.5V & 1.8V I/P's only available to interface the PHY device. We planned to use the DP83640 device with 2.5V VDD I/O to connect to the FPGA.  Also 3.3V analog voltage planned to use on the Fiber section. Here application is a 10/100Mbps Fiber mode.

Please let us know suggestions  to  implement this solution.

  • Hi Penchalaiah,

    The DP83640 supports this solution you describe. There is a recommended fiber network described in section 6.2.1.2 in the datasheet. In section 3.10 we have a description of different strap options you can use so that software configuration can be reduced/eliminated to get 100Base-FX operation. Also, this EVM has an example layout/BOM for fiber implementation (www.ti.com/.../dp83640t-evk).

    Kind regards,
    Ross