Embedded Tri-Mode Ethernet MAC User Guide www.xilinx.com 99UG074 (v2.2) February 22, 2010RChapter 4Physical InterfaceThe following sections describe the design considerations when using the Ethernet MACfor the supported interfaces. The wrapper for the different physical interfaces are providedin the Xilinx® CORE Generator™ tool. The interfaces are available in both VHDL andVerilog. The wrapper files created by the CORE Generator tool will contain the clockinglogic. By using the CORE Generator tool, the time required to instantiate the EthernetMAC into a usable design is greatly reduced. See “Using the Embedded Ethernet MAC,”page 167. The # in the following sections denotes either EMAC0 or EMAC1.Media Independent Interface (MII)MII is designed to IEEE Std 802.3-2002, Clause 22. It is used for 10 Mb/s and 100 Mb/s.MII InterfaceFigure 4-1 shows the Ethernet MAC configured with MII as the physical interface. In thisinterface, not all the ports of the Ethernet MAC are used.www.BDTIC.com/XILINX
