32.6.20 PHY Interface

Different PHY interfaces are supported by the Ethernet MAC:

• GMII
• MII
• RMII

The MII interface is provided for 10/100 operation and uses TXD[3:0] and RXD[3:0]. The RMII interface is provided for 10/100 operation and uses TXD[1:0] and RXD[1:0].

The GMII should only be used for 1000 Mbps operation and it uses TXD[7:0] and RXD[7:0].