Installation guide

Cabling Specifications A-83
Ethernet Cable Pinouts
Figure A-20 MII Connection (Female)
Table A-32 lists the MII connector pinouts and signals. MII cables are available
commercially.
1. Any pins not indicated are not used.
2. Tx_CLK and Rx_CLK are generated by the external transceiver.
Table A-32 MII Connector Pinouts and Signals
Pin
1
In Out In/Out Description
14–17 – Yes – Transmit Data (TxD)
12 Yes – – Transmit Clock (Tx_CLK)
2
11 – Yes – Transmit Error (Tx_ER)
13 – Yes – Transmit Enable (Tx_EN)
3 – Yes – MII Data Clock (MDC)
4–7 Yes – – Receive Data (RxD)
9 Yes – – Receive Clock (Rx_CLK)
10 Yes – – Receive Error (Rx_ER)
8 Yes – – Receive Data Valid (Rx_DV)
18 Yes – – Collision (COL)
19 Yes – – Carrier Sense (CRS)
2 – – Yes MII Data Input/Output (MDIO)
22–39 – – – Common (ground)
1, 20, 21, 40 – – – +5.0 volts (V)
Jackscrew Pin 21
Pin 1
H7057