3-22
Cisco 12404 Internet Router Installation and Configuration Guide
OL-11636-01
Chapter 3 Installing the Cisco 12404 Internet Router
Connecting to the Console Port and Auxiliary Ports
Figure 3-11
Ethernet MII Receptacle
shows the Ethernet RJ-45 receptacle.
Table 3-5
Ethernet MII Pin Configuration
Pin
1
1.
Pins not listed are not in use.
In
Out
Input/Output
Description
Code
14 to17
–
Yes
–
Transmit Data
(TxD)
12
Yes
–
–
Transmit Clock
(Tx_CLK)
2
2.
Tx_CLK and Rx_CLK are provided by the external transceiver.
11
–
Yes
–
Transmit Error
(Tx_ER)
13
–
Yes
–
Transmit Enable
(Tx_EN)
3
–
Yes
–
MII Data Clock
(MDC)
4 to 7
Yes
–
–
Receive Data
(RxD)
9
Yes
–
–
Receive Clock
(Rx_CLK)
10
Yes
–
–
Receive Error
(Rx_ER)
8
Yes
–
–
Receive Data Valid (Rx_DV)
18
Yes
–
–
Collision
(COL)
19
Yes
–
–
Carrier Sense
(CRS)
2
–
–
Yes
MII Data
Input/Output
(MDIO)
22 to 39
–
–
–
Common
(Ground)
1, 20, 21,
40
–
–
–
+5.0 V
(V)
Jackscrew
Pin 21
Pin 1
H6538
todd.book Page 22 Tuesday, November 27, 2007 6:02 PM
