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The 7403 does not support the S4 (Suspend to Disk) sleeping state. Reference the ACPI
Specification for details.
Peripherals: ACPI defines power states for peripherals which are separate from the system
power state. The device power states range from D0 (fully-on) to D3 (off) It is the
responsibility of the driver developer for each peripheral to define and support the available
power states.
Power State
Supported: Y / N
Description
Power Supply Status
Power Consumption*
Wake Options:
Power Switch
Touch
Motion
USB Keyboard
USB Mouse
LAN (magic packet)
RTC Alarm
Serial Port (RI)
* Power consumption based on the following configuration with no peripherals
(Celeron 575 , one 512MB DIMM, one HDD)
S3 (Suspend to Ram): The S3 sleeping state is a low wake latency sleeping state. This
state is similar to the S1 sleeping state except that the CPU and system cache context is
lost (the OS is responsible for maintaining the caches and CPU context). Control starts
from the processor's reset vector after the wake event. In NCR systems, during S3, power
is only provided to the on-board USB ports.
Requirements for S3 support:
O/S must be built on a system with S3 enabled in the BIOS
–
Some peripherals may not be S3 capable, which can prevent the system from entering
–
S3 state.
S3 Standby state is not compatible with UPS support.
–
S4 (Suspend to Disk): The S4 state is the lowest power, longest wake latency sleeping
state supported by ACPI. In order to reduce power to a minimum, it is assumed that the
hardware platform has powered off all devices. Platform context is maintained.
S1
S0
Standby
Working
Y
Y
Fully
-Video back
Functional
light off
-HDD off
-Cache Flush
- CPU halted
On
On
TBD
TBD
N/A
Y
N/A
Y
N/A
Y
N/A
Y
N/A
Y
N/A
Y
N/A
Y
N/A
Y
S3
S2
Suspend to
RAM
N
Y
-Video back
-Video back
light off
light off
-HDD off
-HDD off
-Cache Flush
-Cache Flush
-Memory in
-Memory data
slow refresh
to HDD
Powered
Down**
TBD
Y
Y
N
Per O/S
Per O/S
Y
Y
Y
Chapter 1: Overview 1-27
S4
S5
Hibernate
Soft Off
Y
Y
Some devices
remain powered
by standby
voltage (LAN,
ME-AMT, USB)
to allow wake-up
Powered
Powered
Down**
Down**
TBD
TBD
Y
Y
N
N
N
N
N
N
N
N
Y
Y
Y
Y
Y
Y
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