Media Independent Interface (MII) 40 pin

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Image:connector_dsubhi40f.png 40 pin hi-density D-SUB female connector at the network device.

Image:connector_dsubhi40m.png 40 pin hi-density D-SUB male connector at the transciever.

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

Notes

  • Direction is DTE (Network device) relative DCE (Transciever)

References

Category: Networking Connectors

 

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