Freescale Semiconductor TWR-MCF52259-Ethenet User Manual page 18

• The MII links the Ethernet MAC with
the PHY.
• An MII may support both 10-Mb/s and
100-Mb/s operation, allowing network
devices to connect to both 10BASE-T
and 100BASE-T media segments.
• The MII electronics may be linked to
an outboard transceiver through a
40-pin MII connector and a short
(0.5m) MII cable.
• The MII is internally connected to the
EPHY on the MCF5223x
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*Media Independent Interface (MII)
4-bit wide Tx and Rx data @2.5MHz or 25MHz
TTL signal levels
Full duplex
Media status signals:
Carrier Presence & Collision
Typical MII Interface
TXD n_<3:0>
TX_ERn
TX_ENn
TX_CLKn
RXD n_<3:0>
RXDVn
RX_ER n
RX_CLK n
CRS n
COL n
PHY
with
MII
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TM