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Honored Contributor
Honored ContributorTSE MAC and Marvell 88E1111
I'm having trouble to bring up the TSE MAC to Ethernet interface on the Stratix II GX PCIe board. I was able to instantiate a triple speed Ethernet MAC and build logic around it. The loopback at the ...
Altera_ForumHonored Contributor
Honored Contributor --- Quote Start --- 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. --- Quote End --- 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.
