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Altera_Forum's avatar
Altera_Forum
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13 years ago

MDIO module

Hello all, I am trying to access registers in a device communicating with my CycloneIV through MDIO clause 22. I added the "Ethernet MDIO" module in my QSys design along with Nios. My ques...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

The MDIO module from Altera only supports clause 45, as you discovered. To use clause 22, you will need either to do it yourself in VHDL, or use a complete MAC. The Triple Speed Ethernet MAC from Altera includes a clause 22 MDIO module. Now that said it could be a bit overkill to put a full MAC component just to use the MDIO part ;)