Transition To S1 Or S3; Transition To S4; Transition To S5; Transition To Full-On - Intel 915GME User Manual

Theory of Operation—Mobile Intel
Table 5 lists the power management states that have been identified for the Mobile
®
Intel 915GME Express Chipset Platform.
Table 5. Mobile Intel
State
G0/S0/C0
G0/S0/C2
G0/S0/C3
G0/S0/C4
G1/S3_HOT
G1/S3_COLD
G1/S4
G2/S5
G3
3.6.1

Transition to S1 or S3

If enabled, the transition to S1 or S3 from the full-on state can be accomplished in the
following ways:
• The OS performs the transition through software.
• Press the front panel power button for less than four seconds (assuming the OS
power management support has been enabled).
3.6.2

Transition to S4

"Wake on S4" (Suspend to disk) is controlled by the operating system.
3.6.3

Transition to S5

The transition to S5 is accomplished by the following means:
• Press the front panel power button for less than four seconds (if enabled through
the OS).
• Press the front panel power button for more than four seconds to activate power
button override.
3.6.4

Transition to Full-On

The transition to the Full-On state can be from S1, S3, or S5. The transition from S1 or
S3 is a low latency transition that is triggered by one of the following wake events:
• Power management timer expiration
• Real Time Clock (RTC) triggered alarm
• Power button activation
• USB device interrupt
• PME# assertion
• Mouse/Keyboard movement (Applies only to S1 Transition)
• AC power loss
April 2007
Order Number: 317230-001US
®
915GME Express Chipset
®

915GME Express Chipset Power Management States

Full On
STPCLK# signal active
Deep Sleep: DPSLP# signal active
Deeper Sleep: DPRSLP# signal active
Suspend to RAM (all S3 rails are turned on except processor power rails)
Suspend to RAM (all S3 rails are turned off)
Suspend to Disk
Soft Off
Mechanical Off
Description
®
Mobile Intel
Development Kit User's Manual
915GME Express Chipset
29