Intel® Desktop Board DQ67OW Technical ... - Viglen Download

Intel Desktop Board DQ67OW Technical Product Specification1.16.1 ACPIACPI gives the operating system direct control over the power management and Plugand Play functions of a computer. The use of ACPI with this board requires anoperating 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-inboards 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/standbysleeping state• A Soft-off feature that enables the operating system to power-off the computer• Support for multiple wake-up events (see Table 7 on page 36)• Support for a front panel power and sleep mode switchTable 5 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 5. Effects of Pressing the Power SwitchIf the system is in thisstate…Off(ACPI G2/G5 – Soft off)On(ACPI G0 – working state)On(ACPI G0 – working state)Sleep(ACPI G1 – sleeping state)Sleep(ACPI G1 – sleeping state)…and the power switch ispressed forLess than four secondsLess than four secondsMore than six secondsLess than four secondsMore than six seconds…the system enters this statePower-on(ACPI G0 – working state)Soft-off/Standby (note)(ACPI G1 – sleeping state)Fail safe power-off(ACPI G2/G5 – Soft off)Wake-up(ACPI G0 – working state)Power-off(ACPI G2/G5 – Soft off)Note: System can only enter Standby state if power switch action is properly configured by theoperating system.34