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Ordinateurs - Intel® Desktop Board DX58SO2 (866.22 kb)
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Table 6. 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 six 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 six seconds Power-off (ACPI G2/G5 – Soft off) 1.13.1.1 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. Intel Desktop Board DX58SO2 Technical Product Specification Table 7 lists the power states supported by the board along with the associated system power targets. See the ACPI specification for a complete description of the various system and power states. Table 7. Power States and Targeted System Power Global States Sleeping States Processor States Device States Targeted System Power (Note 1) G0 – working state S0 – working C0 – working D0 – working state. Full power > 30 W G1 – sleeping state S1 – Processor stopped C1 – stop grant D1, D2, D3 – device specification specific. 5 W < power < 52.5 W G1 – sleeping state S3 – Suspend to RAM. Context saved to RAM. No power D3 – no power except for wake-up logic. Power < 5 W (Note 2) G1 – sleeping state S4 – Suspend to disk. Context saved to disk. No power D3 – no power except for wake-up logic. Power < 5 W (Note 2) G2/S5 S5 – Soft off. Context not saved. Cold boot is required. No power D3 – no power except for wake-up logic. Power < 5 W (Note 2) G3 – mechanical off AC power is disconnected from the computer. No power to the system. No power D3 – no power for wake-up logic, except when provided by battery or external source. No power to the system. Service can be performed safely. Notes: 1. Total system power is dependent on the system configuration, including add-in boards and peripherals powered by the system chassis’ power supply. 2. Dependent on the standby power consumption of wake-up devices used in the system. Product Description 1.13.1.2 Wake-up Devices and Events Table 8 lists the devices or specific events that can wake the computer from specific states. Table 8. Wake-up Devices and Events These devices/events can wake up the computer… …from this state LAN S1, S3, S4, S5 (Note 1) PME# signal S1, S3, S4, S5 (Note 1) Power switch S1, S3, S4, S5 RTC alarm S1, S3, S4, S5 USB S1, S3 WAKE# S1, S3, S4, S5 Consumer IR S1, S3 (S4 and S5)(Note 2) Note 1: For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program. Setting this option to Power On will enable a wake-up event from LAN in the S5 state. Note 2: Wake from S4 and S5 is optional by the specification. .. NOTE The use of these wake-up events from an ACPI state requires an operating system that provides full ACPI support. In addition, software, drivers, and peripherals must fully support ACPI wake events. Intel Desktop Board DX58SO2 Technical Product Specification 1.13.2 Hardware Support CAUTION Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and Instantly Available PC technology features are used. Failure to do so can damage the power supply. The total amount of standby current required depends on the wake devices supported and manufacturing options. The board provides several power management hardware features, including: • Power connector • Fan headers • LAN wake capabilities • Instantly Available PC technology • Wake from USB • PME# signal wake-up support • WAKE# signal wake-up support • Wake from Consumer IR LAN wake capabilities and Instantly Available PC technology require power from the +5 V standby line. .. NOTE The use of Wake from USB from an ACPI state requires an operating system that provides full ACPI support. 1.13.2.1 Power Connector ATX12V-compliant power supplies can turn off the system power through system control. When an ACPI-enabled system receives the correct command, the power supply removes all non-standby voltages. When resuming from an AC power failure, the computer returns to the power state it was in before power was interrupted (on or off). The computer’s response can be set using the Last Power State feature in the BIOS Setup program’s Boot menu. For information about Refer to The location of the main power connector Figure 11, page 43 The signal names of the main power connector Table 19, page 49 Product Description 1.13.2.2 Fan Headers The function/operation of the fan headers ...