Power Management - HP Compaq d330 DT Technical Reference Manual

Chapter 7 Power and Signal Distribution

7.2.3 POWER MANAGEMENT

These systems include power management functions designed to conserve energy. These
functions are provided by a combination of hardware, firmware (BIOS) and software. The system
provides the following power management features:
ACPI v1.0b compliant (ACPI modes C1, C2, S1, and S3, )
APM 1.2 compliant
U.S. EPA Energy Star compliant
Table 7-4 shows the comparison in power states.
Table 7-4. System Power States
Power
State
G0, S0, D0
G1, S1, C1, D1
G1, S2/3, C2,
D2 (Standby/
suspend)
G1, S4, D3
(Hibernation)
G2, S5, D3
cold
G3
NOTES:
Gn = Global state.
Sn = Sleep state.
Cn = ACPI state.
Dn = PCI state.
[1] Power cord is disconnected for this condition.
[2] Actual transition time dependent on OS and/or application software.
7-6 hp compaq d330 and d530 Series of Personal Computers
Featuring the Intel Pentium 4 Processor
System Power States
System Condition
System fully on. OS and application
is running, all components.
System on, CPU is executing and
data is held in memory. Some
peripheral subsystems may be on
low power. Monitor is blanked.
System on, CPU not executing,
cache data lost. Memory is holding
data, display and I/O subsystems on
low power.
System off. CPU, memory, and
most subsystems shut down.
Memory image saved to disk for
recall on power up.
System off. All components either
completely shut down or receiving
minimum power to perform system
wake-up.
System off (mechanical). No power
to any internal components except
RTC circuit. [1]
First Edition - June 2003
Table 7-4.
Power
Consumption
Maximum
Low
Low
Low
Minimum
None
Transition OS Restart
To S0 by [2] Required
N/A No
< 2 sec after No
keyboard or
pointing device
action
< 5 sec. after No
keyboard,
pointing device,
or power button
action
<25 sec. after Yes
power button
action
<35 sec. after Yes
power button
action
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