Product Description
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1.9.3 LAN Subsystem Software
LAN software and drivers are available from Intel’s World Wide Web site.
For information about Refer to
Obtaining LAN software and drivers Section 1.2, page 16
1.10 CNR (Optional)
The CNR connector provides an interface that supports the audio, modem, USB, and LAN
interfaces of the Intel 850 chipset. Figure 5 shows the signal interface between the riser and the
ICH2.
Intel 82801BA
I/O Controller Hub
(ICH2)
Communication and
Networking Riser
(Up to two AC ’97 codecs
and one LAN device)
CNR Connector
AC ’97 Interface
LAN Interfaces
SMBus
Power
OM10412
USB
Figure 5. ICH2 and CNR Signal Interface
The interfaces supported by the CNR include the following:
• AC ’97 interface: supports audio and/or modem functions on the CNR board.
• LAN interfaces: provides one of two LAN interfaces for networking functions. Interfaces
include an eight-pin interface for use with Platform LAN Connection (PLC) based devices, and
a 17-pin interface for Media Independent Interface (MII) based devices (commonly referred to
as a PHY).
• SMBus interface: provides Plug-and-Play functionality for the CNR board.
• USB interface: provides a USB interface for the CNR board.
The CNR connector includes power signals required for power management and for CNR board
operation. To learn more about the CNR, refer to the CNR specification.
For information about Refer to
Obtaining the CNR specification Section 1.3, page 16
CAUTION
Do not install a LAN CNR board if the D850GB already has onboard LAN subsystem. Doing so
could prevent the board from connecting to the LAN.
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