HP D315 manual System Power States, Power Transition OS Restart State System Condition

Technical Reference Guide

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

Table 7-2.

System Power States

Power		Power	Transition	OS Restart
State	System Condition	Consumption	To S0 by [2]	Required
G0, S0, D0	System fully on. OS and application	Maximum	N/A	No
	is running, all components.
G1, S1, C1, D1 System on, CPU is executing and		Low	< 2 sec after	No
	data is held in memory. Some		keyboard or
	peripheral subsystems may be on		pointing device
	low power. Monitor is blanked.		action
G1, S2/3, C2,	System on, CPU not executing,	Low	< 5 sec. after	No
D2 (Standby/	cache data lost. Memory is holding		keyboard,
suspend)	data, display and I/O subsystems on		pointing device,
	low power.		or power button
			action
G1, S4, D3	System off. CPU, memory, and	Low	<25 sec. after	Yes
(Hibernation)	most subsystems shut down.		power button
	Memory image saved to disk for		action
	recall on power up.
G2, S5, D3cold	System off. All components either	Minimum	<35 sec. after	Yes
	completely shut down or receiving		power button
	minimum power to perform system		action
	wake-up.
G3	System off (mechanical). No power	None	—	—
	to any internal components except
	RTC circuit. [1]

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.

Compaq D315 and hp d325 Personal Computers 7-5

Featuring the AMD Athlon XP Processor

Second Edition - April 2003