The Ethernet MII management interface signal ports are described in the following table.
| Signal Name | Direction | Initial Status | Description |
|---|---|---|---|
| mdc | Out | 0 | TEMAC to PHY MII management bus clock. |
| mdio | In/Out | 1 | 3-stateable bidirectional MII Management data bus. If the MDIO interface of AXI Ethernet is not used, the MDIO_I signal must be tied High to allow MDIO communication to the internal Ethernet MAC. In all modes, individual mdio_i (input) mdio_o (output) and mdio_t (3-state enable) signals are provided. |