Connector - Media Independent Interface (MII)40 PIN HI-DENSITY D-SUB FEMALE at the network device. 40 PIN HI-DENSITY D-SUB MALE at the transciever. | (at the network device). |  | (at the transciever). |
| Pin | Name | Direction | Description |
|---|
| 1 | V | --- | +5 Vdc/ 3.3 Vdc | | 2 | MDIO | --- | MII Data Input/Output | | 3 | MDC | Output | MII Data Clock | | 4 | RxD | Input | Rx Data | | 5 | RxD | Input | Rx Data | | 6 | RxD | Input | Rx Data | | 7 | RxD | Input | Rx Data | | 8 | Rx_DV | Input | Rx Data Valid | | 9 | Rx_CLK | Input | Rx Clock | | 10 | Rx_ER | Input | Rx Error | | 11 | Tx_ER | Output | Tx Error | | 12 | Tx_CLK | Input | Tx Clock | | 13 | Tx_EN | Output | Tx Enable | | 14 | TxD | Output | Tx Data | | 15 | TxD | Output | Tx Data | | 16 | TxD | Output | Tx Data | | 17 | TxD | Output | Tx Data | | 18 | COL | Input | Collision | | 19 | CRS | Input | Carrier Sense | | 20 | V | --- | +5 Vdc/ +3.3 Vdc | | 21 | V | --- | +5 Vdc/ +3.3 Vdc | | 22 | GND | --- | Ground | | 23 | GND | --- | Ground | | 24 | GND | --- | Ground | | 25 | GND | --- | Ground | | 26 | GND | --- | Ground | | 27 | GND | --- | Ground | | 28 | GND | --- | Ground | | 29 | GND | --- | Ground | | 30 | GND | --- | Ground | | 31 | GND | --- | Ground | | 32 | GND | --- | Ground | | 33 | GND | --- | Ground | | 34 | GND | --- | Ground | | 35 | GND | --- | Ground | | 36 | GND | --- | Ground | | 37 | GND | --- | Ground | | 38 | GND | --- | Ground | | 39 | GND | --- | Ground | | 40 | V | --- | +5 Vdc/ +3.3 Vdc |
Note: Direction is DTE (Network device) relative DCE (Transciever).
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