Power Management - HP Compaq D315 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, )
API 1.2 compliant (D315 only)
U.S. EPA Energy Star compliant
Table 7-2 shows the comparison in power states.
Table 7-3. System Power States
Power
State
G0, S0, D0
G1, S1, C1, D1
G1, S2/3, C2,
D2 (Stand by/
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.
Table 7-2.
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 save d to disk for
recall on power up.
System off. All components either
completely shut down or receiving
minimum po wer to perform system
wake-up.
System off (mechanical). No power
to any internal components except
RTC circuit. [1]
Second Edition - April 2003
Power
Consumption To S0 by [2]
Maximum
Low < 2 sec after
keyboard or
pointing device
Low < 5 sec. after
pointing device,
or power button
Low <25 sec. after
pow
Minimum <35 sec. after
pow
None
Compaq D315 and hp d325 Personal Computers
Featuring the AMD Athlon XP Processor
Technical Reference Guide
Transition OS Restart
Required
N/A No
No
action
No
keyboard,
action
Yes
er butt on
action
Yes
er butt on
action
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