LAN Subsystem
The LAN subsystem consists of the following:
•
Intel® 82579LM Gigabit Ethernet Controller (10/100/1000 Mb/s)
o
10/100/1000 BASE-T IEEE 802.3 compliant
o
Energy Efficient Ethernet (EEE) IEEE 802.3az support (Low Power Idle (LPI) mode)
o
Dual interconnect between the Integrated LAN Controller and the Physical Layer (PHY):
PCI Express-based interface for active state operation (S0) state
SMBUS for host and management traffic (Sx low power state)
o
Compliant to IEEE 802.3x flow control support
o
802.1p and 802.1q
o
TCP, IP, and UDP checksum offload (for IPv4 and IPv6)
o
Full device driver compatibility
•
Intel® QS77 Express Chipset
•
RJ-45 LAN connector with integrated status LEDs
Additional features of the LAN subsystem include:
•
CSMA/CD protocol engine
•
Jumbo frame support
•
LAN connect interface between the PCH and the LAN controller
•
Power management capabilities
− ACPI technology support
− LAN wake capabilities
•
LAN subsystem software
Two LEDs are built into the RJ-45 LAN connector. The below table describes the LED states when the board is powered up
and the LAN subsystem is operating
LAN Connector LED States
LED
LED Color
LED State
Condition
Link
Green
Off
On
Blinking
LAN link is not established
LAN link is established
LAN activity is occurring
Data Rate
Green / Yellow
Off
Green
Yellow
10 Mb/s data rate is selected
100 Mb/s data rate is selected
1000 Mb/s data rate is selected
Hardware Management Subsystem
The hardware management features enable the board to be compatible with the Wired for Management (WfM) specification.
The board has several hardware management features, including thermal and voltage monitoring.
The hardware monitoring and fan control subsystem is based on a Nuvoton NCT5577D embedded controller, which support
the following:
•
Processor and system ambient temperature monitoring
•
Chassis fan speed monitoring
•
Voltage monitoring of +12V, +5V, +3.3V, Memory Vcc (V_SM), +Vccp, PCH VCC
•
SMBus interface
Fan monitoring can be implemented using third-party software.
Power Management
Power Management is implemented at several levels including:
•
Software support through Advanced Configuration and Power Interface (ACPI)
•
Hardware support:
− Power Input
− Instantly Available PC technology
− LAN wake capabilities
− Wake from USB
− WAKE# signal wake-up support
− Wake from S5
− Wake from CIR
− +5 V Standby Power Indicator LED
