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Chapter 5 Input/Output Interfaces
Compaq Deskpro 4000N and 4000S Personal Computers
First Edition – September 1997
5-36
5.7.1 NIC CONFIGURATION/CONTROL
The NIC is a PCI device and configured through PCI configuration space registers. The NIC is
controlled through I/O registers mapped in the 300h-30Fh range.
5.7.2 NIC CONNECTORS
The network interface provides two choices of connection to a LAN system as shown in the
following figures.
Figure 5–9
. Ethernet AUI Connector (DB-15, viewed from rear)
Figure 5–10
. Ethernet RJ-45 Connector
12438765
Pin Description
1 Transmit
2 Transmit Low
3 Receive
6 Receive Low
1
15
Pin Description Pin Description
1 Ground 9 Control In RTN
2 Control In 10 TX Data RTN
3 TX Data 11 Ground
4 Ground 12 RX Data RTN
5 RX Data 13 +12 VDC
6 Ground 14 Ground
7 n/c 15 n/c
8 Ground