Media Independent Interface (MII)

Pin	Name	Dir	Description
1	V		+5 Vdc/ 3.3 Vdc
2	MDIO		Management Data I/O
3	MDC		Management 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

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