Problems with the MDIO - 4.1 English

GMII to RGMII Product Guide (PG160)

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4.1 English

   Ensure that the MDIO is driven properly. See MDIO Management System for detailed information about performing MDIO transactions.

   Check that the mdc clock is running and that the frequency is 2.5 MHz or less.

   Check that the PHYAD field placed into the MDIO frame matches the attribute value C_PHYADDR of the core.