Freescale Semiconductor TWR-MCF52259-Ethenet manual Media Independent Interface MII

*Media Independent Interface (MII)

• The MII links the Ethernet MAC with	Typical	MII Interface
the PHY.
• An MII may support both 10-Mb/s and
				Magnetics/FiberTransceiver
	MediaAccess Controller (MAC)		TXDn_<3:0>
(0.5m) MII cable.
100-Mb/s operation, allowing network			TX_ERn
devices to connect to both 10BASE-T			TX_ENn
			TX_CLKn
and 100BASE-T media segments.			RXDn_<3:0>
			RXDVn
• The MII electronics may be linked to			RX_ERn
			RX_CLKn
an outboard transceiver through a			CRSn
40-pin MII connector and a short			COLn PHY
			with
			MII

•The MII is internally connected to the EPHY on the MCF5223x

￿4-bit wide Tx and Rx data @2.5MHz or 25MHz

￿TTL signal levels

￿Full duplex

￿Media status signals:

￿Carrier Presence & Collision

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