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Cables and Connectors
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
18 COL Collision 38 --- Ground
19 CRS Carry Sense 39 --- Ground