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bkzshabbaz

Arty Board with RMII?

Question

Is there anything physically preventing me from putting the PHY on the Arty board in RMII mode?  I'm generating a 50MHz eth ref clock using an MMCM , I'm driving the MII_MODE (G16) pin high to strap it to RMII.  What else do I need to do?

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Hi @bkzshabbaz,

I don't believe there is anything preventing you from doing this, though I would probably use the MII to RMII IP that Xilinx has available, much like this tutorial does for the Nexys 4 DDR. Naturally, you would need to change the xdc pin to match the ETH_REF_CLK to match the one for whichever Arty board you happen to be using.

Let me know if you have any questions about this.

Thanks,
JColvin

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I think I have all the pin constraints correct.  Unfortunately, my IP is RMII so that Xilinx MII to RMII IP won't work.  I would need a RMII to MII IP.  I guess I'll move forward with my application and see if it works.

Edited by bkzshabbaz

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