Power Management - HP Compaq dc7100 DT Technical Reference Manual

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 7-5 shows the comparison in power states.
Power
State
G0, S0, D0
G1, S1, C1, D1 System on, CPU is executing and
G1, S2/3, C2,
D2 (Standby/or
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.
Technical Reference Guide
System Power States
System Condition
System fully on. OS and
application is running, all
components.
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]
Table 7-5.
Power
Consumption
Maximum
Low
Low
Low
Minimum
None
361834-002
Power and Signal Distribution
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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