Intel Desktop Board D810E2CA3 Technical Product Specification
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1.13.1.2 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 this board requires the support of an operating
system that provides full ACPI functionality. ACPI features include:
•
Plug and Play (including bus and device enumeration) and APM support normally contained in
the BIOS.
•
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, and less than 5-watt system operation in the Suspend to Disk sleeping state.
•
A Soft-off feature that enables the operating system to power-off the computer.
•
Support for multiple wake up events (see Table 11 on page 37).
•
Support for a front panel power and sleep mode switch. Table 9 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.
Table 9.
Effects of Pressing the Power Switch
If the system is in this state…
…and the power switch is
pressed for
…the system enters this state
Off
(ACPI G2/G5 – Soft off)
Less than four seconds
Power-on
(ACPI G0 – working state)
On
(ACPI G0 – working state)
Less than four seconds
Soft-off/Standby
(ACPI G1 – sleeping state)
On
(ACPI G0 – working state)
More than four seconds
Fail safe power-off
(ACPI G2/G5 – Soft off)
Sleep
(ACPI G1 – sleeping state)
Less than four seconds
Wake up
(ACPI G0 – working state)
Sleep
(ACPI G1 – sleeping state)
More than four seconds
Power-off
(ACPI G2/G5 – Soft off)
✏
NOTE
The optional Wake on LAN technology connector at location J7A1 is provided to support wake up
from a LAN adapter in APM mode. Wake on LAN technology in ACPI mode is supported by the
PME# signal on the PCI connector.
For information about
Refer to
The board’s compliance level with ACPI
Section 1.3, page 16
1.13.1.2.1
System States and Power States
Under ACPI, the operating system directs all system and device power state transitions. The
operating system puts devices in and out of low-power states based on user preferences and
knowledge of how devices are being used by applications. Devices that are not being used can be
turned off. The operating system uses information from applications and user settings to put the
system as a whole into a low-power state.