Lan Subsystem; Intel ® 82562Et Physical Layer Interface Device; Lan Connector With Integrated Leds; Lan Connector Led Locations - Intel D845PEBT2 Specification

1.13 LAN Subsystem

The network interface controller subsystem consists of the ICH4 with integrated LAN Media
Access Controller (MAC) and a physical layer interface device. Features of the LAN subsystem
include:
•
PCI bus master interface
•
CSMA/CD protocol engine
•
Serial CSMA/CD unit interface that supports the 82562ET (10/100 Mbits/sec Ethernet)
•
PCI power management
 Supports ACPI technology
 Supports LAN wake capabilities
1.13.1 Intel ® 82562ET Physical Layer Interface Device
The Intel 82562ET component provides an interface to the back panel RJ-45 connector with
integrated LEDs.
The Intel 82562ET provides the following functions:
•
Basic 10/100 Ethernet LAN connectivity
•
Supports RJ-45 connector with status indicator LEDs on the back panel
•
Full device driver compatibility
•
ACPI support
•
Programmable transit threshold
•
Configuration EEPROM that contains the MAC address
1.13.2 RJ-45 LAN Connector with Integrated LEDs
Two LEDs are built into the RJ-45 LAN connector (shown in Figure 7 below).
Table 5 describes the LED states when the Desktop Board is powered up and the LAN subsystem
is operating.
Table 5.

LAN Connector LED States

LED Color LED State
Green Off
On
Yellow Off
On (steady state)
On (brighter and pulsing)
Green LED
Figure 7. LAN Connector LED Locations
Condition
10 Mbits/sec data rate is selected.
100 Mbits/sec data rate is selected.
LAN link is not established.
LAN link is established.
The computer is communicating with another computer on
the LAN.
Product Description
Yellow LED
OM15076
33