S875WP1-E TPS
Functional Architecture
Revision 4.0
25
Global States
Sleeping States
Processor
States
Device States
Targeted System
Power (Note 1)
G3 – mechanical
off
AC power is
disconnected
from the
computer.
No power to the
system.
No power
D3 – no power for
wake-up logic,
except when
provided by battery
or external source.
No power to the system.
Service can be performed
safely.
Notes:
1.
Total system power is dependent on the system configuration, including add-in boards and peripherals
powered
by the system chassis’ power supply.
2.
Dependent on the standby power consumption of wake-up devices used in the system.
3.6.1.2
Wake-up Devices and Events
Table 7 lists the devices or specific events that can wake the computer from specific states.
Table 7. Wake-up Devices and Events
These devices/events can wake up the
computer…
…from this state
LAN
S1, S3, S4, S5 (Note)
Modem (back panel Serial Port A)
S1, S3
PME#
S1, S3, S4, S5 (Note)
Power switch
S1, S3, S4, S5
PS/2 devices
S1, S3
RTC alarm
S1, S3, S4, S5
USB S1,
S3
NOTE
•
For LAN and PME#, S5 is disabled by default in the BIOS Setup program. Setting this
option to Power On will enable a wake-up event from LAN in the S5 state.
•
The use of these wake-up events from an ACPI state requires an operating system that
provides full ACPI support. In addition, software, drivers, and peripherals must fully
support ACPI wake events.
3.6.1.3 Plug
and
Play
In addition to power management, ACPI provides control information so that operating systems
can facilitate Plug and Play. ACPI is used only to configure devices that do not use other
hardware configuration standards. PCI devices for example, are not configured by ACPI.