10/100 Fast Ethernet Switch User’s Guide
MII Connector Specifications
75
MII Connector Pin Assignment
Contact
MII
Signal
Signal Name
Contact
MII
Signal
Signal Name
1
+5 V
Voltage
21
+5 V
Voltage
2
MDIO
MAC Data
Input Output
22
---
Ground
3
MDC
MAC Data
Clock
23
---
Ground
4
RXD<3>
Receive Data 3
bit
24
---
Ground
5
RXD<2>
Receive Data 2
bit
25
---
Ground
6
RXD<1>
Receive Data 1
bit
26
---
Ground
7
RXD<0>
Receive Data 0
bit
27
---
Ground
8
RX_DV
Receive Data
Valid
28
---
Ground
9
RX_CLK
Receive Clock
29
---
Ground
10
RX_ER
Receive Error
30
---
Ground
11
NOT
USED
Not Used
31
---
Ground
12
TX_CLK
Transmit Clock
32
---
Ground
13
TX_EN
Transmit
Enable
33
---
Ground
14
TXD<0>
Transmit Data 0
bit
34
---
Ground
15
TXD<1>
Transmit Data 1
bit
35
---
Ground