NH82801HBM S LB9A Intel, NH82801HBM S LB9A Datasheet - Page 123

• Manufacturer Part Number: NH82801HBM S LB9A
• Description: CONTROLLER HUB, ICH8M, I/O, 82801HBM
• Manufacturer: Intel

Specifications of NH82801HBM S LB9A

• Power Dissipation Pd: 2.4W
• Digital Ic Case Style: BGA
• No. Of Pins: 676
• Pci Bus Type: I/O Controller Hub
• Pci Express Base Spec: PCIe 1.1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Functional Description
5.3.6.1
5.3.6.1.1
5.3.6.1.2
5.3.6.2
Intel
®
ICH8 Family Datasheet
Partial and Full Power Down Options
Intel Auto Connect Battery Saver has two power saving implementations: partial or full
power down of the PLC device. Both options require an external discrete energy
detection circuit and the use of the ICH8M ENERGY_DETECT signal.
Partial Power Down: Upon link loss the LAN controller sends an in-band message to
power down the internal 1.8V and 1.0V voltage regulators of the PLC device.
Full Power Down: The LAN PHY Power Control feature can be used to signal to an
external power supply controller or a FET switch to power down all the externally
supplied voltage rails of the PLC device.
Energy Detect
Energy Detection is essential to Intel ACBS operation. Energy Detection uses an on-
board discrete circuit to indicate a link partner is connected to the LAN cable. When in
Intel ACBS mode and a link is reestablished the ENERGY_DETECT signal will indicate to
the ICH8M Gigabit LAN Controller (GPIO13 input) to exit Intel ACBS mode and restore
power to the PLC device using the LAN PHY power control feature. Refer to Mobile
Design Guides for further information on the Energy Detection circuit.
LAN PHY Power Control
The LAN PHY Power Control function controls the power supplies to the PLC device. The
LAN PHY Power Control function can be routed to a power supply controller or FET
switch using either the ICH8M GLAN_DOCK# or SPI_CS1# signals configured by the
appropriate soft straps described in Section 24.2.5. The polarity of the signal
associated with the LAN PHY Power Control function can be configured in the NVM, refer
to the Intel
Application Note (AP-496) for details. The LAN PHY power control feature is required to
fully power down the PLC device. This feature is also used to restore power to the PLC
device when the ENERGY_DETECT signal is asserted and the PLC device is in Intel ACBS
mode.
A platform designer may choose to implement Intel ACBS without the LAN PHY Power
Control feature. In such a case, the PLC device will only be able to be partially powered
down when the internal voltage regulators are used.
Intel
Both partial and full power down implementations of Intel ACBS require the use of
GPIO13 of the ICH8M as the ENERGY_DETECT signal. There are no additional ICH8M
configuration requirements for partial power down functionality.
For full power down capability two configurations are available for implementation of
Intel ACBS:
Both configurations are set by the use of ICH8M soft straps located in the Flash
Descriptor Memory Mapped Configuration Registers. See Section 24.2.5.1. If both
GLAN_DOCK# and SPI_CS1# are required signals, only Intel ACBS with partial power
down functionality can be enabled.
1. The recommended implementation is to use the GLAN_DOCK# signal for LAN PHY
2. If GLAN_DOCK# is a required signal, SPI_CS1# can be configured to support the
Power Control functionality.
LAN PHY Power control feature.
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ACBS Signal Configurations
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I/O Controller Hub 8 (ICH8) NVM Map and Programming Information
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