pinout (распиновка)

Media Independent Interface (MII) Connector

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40 pin HI-DENSITY D-SUB female connector  at the network device

Pin Name Dir Description 1 V +5 Vdc/ 3.3 Vdc 2 MDIO MII Data Input/Output 3 MDC MII Data Clock 4 RxD Rx Data 5 RxD Rx Data 6 RxD Rx Data 7 RxD Rx Data 8 Rx_DV Rx Data Valid 9 Rx_CLK Rx Clock 10 Rx_ER Rx Error 11 Tx_ER Tx Error 12 Tx_CLK Tx Clock 13 Tx_EN Tx Enable 14 TxD Tx Data 15 TxD Tx Data 16 TxD Tx Data 17 TxD Tx Data 18 COL Collision 19 CRS 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

40 pin HI-DENSITY D-SUB male connector  at the transciever

Note: Direction is DTE (Network device) relative DCE (Transciever)

Источник: Ethernet (IEEE802.3) page at Connectivity Knowledge Platform (Made IT)