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10/100 Fast Ethernet Switch User’s Guide
MII Connector Specifications
69
MII Connector Pin Assignment
Contact MII
Signal
Signal Name Contact MII Signal Signal Name
1 +5 V Voltage 21 +5 V Voltage
2 MDIO MAC Data Input
Output
22 --- Ground
3 MDC MAC Data Clock 23 --- Ground
4 RXD<3> Receive Data 3 bit 24 --- Ground
5 RXD<2> Receive Data 2 bit 25 --- Ground
6 RXD<1> Receive Data 1 bit 26 --- Ground
7 RXD<0> Receive Data 0 bit 27 --- Ground
8 RX_DV Receive Data
Valid
28 --- Ground
9 RX_CLK Receive Clock 29 --- Ground
10 RX_ER Receive Error 30 --- Ground
11 NOT USED Not Used 31 --- Ground
12 TX_CLK Transmit Clock 32 --- Ground
13 TX_EN Transmit Enable 33 --- Ground
14 TXD<0> Transmit Data 0
bit
34 --- Ground
15 TXD<1> Transmit Data 1
bit
35 --- Ground
16 TXD<2> Transmit Data 2
bit
36 --- Ground
17 TXD<3> Transmit Data 3
bit
37 --- Ground