The interface is defined in IEEE 802.3-2000. Gmii interface data structure conforms to IEEE Ethernet standard. At the same time, it is compatible with the 10 / 100 Mbps working mode specified by MII. Gmii uses 8-bit interface data, working clock 125MHz, so the transmission rate can reach 1000Mbps. The network controller can use the same hardware interface with any PHY The MII bus specified in IEEE802.3 is a general bus used to connect different phys with the same network controller (MAC).
The equivalent interfaces of MII at other rates are AUI (10M Ethernet), gmii (Gigabit Ethernet) and XAUI (10 Gigabit Ethernet).
MII CHANNEL THEME SLOWED MAC
MII standard interface is used to connect Fast Ethernet MAC block and PHY“ “Media independent” indicates that any PHY device can work normally without redesigning or replacing MAC hardware. The configuration and status data is written/read to/from the PHY via the MDIO signal. MII management interface has only two signal lines. Through the management interface, the upper layer can monitor and control PHY. Management interface is a dual signal interface: one is clock signal, the other is data signal. A total of 16 signals are required for the MII data interface. Each channel has its own data, clock and control signal.
The data interface includes two independent channels for transmitter and receiver respectively. It includes a data interface and a management interface between MAC and PHY (Figure 1). MII is the media independent interface, which is the Ethernet industry standard defined by ieee-802.3.