Intel D845HV Product Specification - Page 37

Power Management

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Product Description 1.13.3 Chassis Intrusion and Detection The boards support a chassis security feature that detects if the chassis cover is removed. For the chassis intrusion circuit to function, the chassis' power supply must be connected to AC power. The security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion connector. The mechanical switch is closed for normal computer operation. For information about The location of the chassis intrusion connector The signal names of the chassis intrusion connector Refer to Figure 12, page 58 Table 33, page 60  NOTE Chassis intrusion detection may be implemented using third-party software. 1.14 Power Management Power management is implemented at several levels, including: • Software support through Advanced Configuration and Power Interface (ACPI) • Hardware support:  Power connector  Fan connectors  LAN wake capabilities  Instantly Available PC technology  Resume on Ring  Wake from USB  Wake from PS/2 devices  Power Management Event (PME#) wake-up support 1.14.1 ACPI ACPI gives the operating system direct control over the power management and Plug and Play functions of a computer. The use of ACPI with the D845HV and D845WN boards requires an operating system that provides full ACPI support. ACPI features include: • Plug and Play (including bus and device enumeration) • Power management control of individual devices, add-in boards (some add-in boards may require an ACPI-aware driver), video displays, and hard disk drives • Methods for achieving less than 15-watt system operation in the power-on/standby sleeping state • A Soft-off feature that enables the operating system to power-off the computer • Support for multiple wake-up events (see Table 10 on page 40) • Support for a front panel power and sleep mode switch. Table 8 lists the system states based on how long the power switch is pressed, depending on how ACPI is configured with an ACPI-aware operating system. 37

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Product Description
37
1.13.3
Chassis Intrusion and Detection
The boards support a chassis security feature that detects if the chassis cover is removed.
For the
chassis intrusion circuit to function, the chassis’ power supply must be connected to AC power.
The security feature uses a mechanical switch on the chassis that attaches to the chassis intrusion
connector.
The mechanical switch is closed for normal computer operation.
For information about
Refer to
The location of the chassis intrusion connector
Figure 12, page 58
The signal names of the chassis intrusion connector
Table 33, page 60
NOTE
Chassis intrusion detection may be implemented using third-party software.
1.14 Power Management
Power management is implemented at several levels, including:
•
Software support through Advanced Configuration and Power Interface (ACPI)
•
Hardware support:
Power connector
Fan connectors
LAN wake capabilities
Instantly Available PC technology
Resume on Ring
Wake from USB
Wake from PS/2 devices
Power Management Event (PME#) wake-up support
1.14.1
ACPI
ACPI gives the operating system direct control over the power management and Plug and Play
functions of a computer.
The use of ACPI with the D845HV and D845WN boards requires an
operating system that provides full ACPI support.
ACPI features include:
•
Plug and Play (including bus and device enumeration)
•
Power management control of individual devices, add-in boards (some add-in boards may
require an ACPI-aware driver), video displays, and hard disk drives
•
Methods for achieving less than 15-watt system operation in the power-on/standby
sleeping state
•
A Soft-off feature that enables the operating system to power-off the computer
•
Support for multiple wake-up events (see Table 10 on page 40)
•
Support for a front panel power and sleep mode switch.
Table 8 lists the system states based on how long the power switch is pressed, depending on how
ACPI is configured with an ACPI-aware operating system.