Freescale Semiconductor TWR-MCF52259-Ethenet - Manual (Page 18)

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• 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
M
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d
ia
A
c
c
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s
s
C
o
n
tr
o
ll
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r
(M
A
C
)
TX_ERn
RXDn_<3:0>
Typical MII Interface
PHY
with
MII
M
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tic
s
/F
ib
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r T
ra
n
s
c
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iv
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TXDn_<3:0>
TX_ENn
RXDVn
RX_ER
n
RX_CLK n
TX_CLKn
CRSn
COLn
*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