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the MDIO is a shared bus. You can have a signgle MDC and a single MDIO pin on the FPGA, connected to both MDC and MDIO pins on the PHY chips.
If they are already connected separately, then you'll have to write a little logic to merge them into a single bus inside the FPGA. The MDC is output only so you can just duplicate the signal. The MDIO is bidirectionnal though, so you need a bit more. When used as an output you can duplicate it to both PHYs too, and when used as an input, just do an AND between the two inputs from the PHYs before feeding it to the TSE.
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Hi,
Thank you very much for your prompt & valuable reply.
We would like to confirm the connection between the TSE MAC & the 2 PHYs, so kindly check the attached image.
I thought that we may need OR not AND between the inputs from the two PHYs, so kindly explain.
Best Regards.
Honored Contributor
