FIC MB05W Service Manual
FIC MB05 Service Manual
1-51
S3 Sleeping State:
The S3 sleeping state is a low wake-up latency sleeping state where all system context is
lost except system memory. CPU, cache, and chip set context are lost in this state.
Hardware maintains memory context and restores some CPU and L2 configuration context.
Control starts from the processor
’
s reset vector after the wake-up event.
S4 Sleeping State:
The S4 sleeping state is the lowest power, longest wake-up 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 saved in disk.
S5 Soft Off State:
The S5
state is similar to the S4 state except the OS does not save any context nor
enable any devices to wake the system. The system is in the
“
SOFT
”
off state and requires a
complete boot when awakened. Software uses a different state value to distinguish between
the S5 state and the S4 state to allow for initial boot operations within the BIOS to
distinguish whether or not the boot is going to wake from a saved
memory image.
System Power Plane
The system components are grouped as the following parties to let the system to control the
On/Off of power under different power management modes.
3.4.1
System Power Plane
The system components are grouped as the following parties to let the system to control the
On/Off of power under different power management modes.
The power plane is divided as following:
Power Group Power
Control
Pin
Controlled Devices
+B
Nil
IMM, (9V~20V)
+3VA
Nil
RTC I/F, PMU08
+12V
PWRON
PCMCIA Card, AC97 Codec
+5V
PWRON
PCMCIA Slot 5V
+3V
PWRON
VGA, PCMCIA, PCMCIA Slot 3V, DRAM, Twister(DRAM I/F),
M3885x, MAX3243
+5VS
SUSB#
FLASH ROM, HDD, CD-ROM, USB, Internal K/B, Glide Pad,
Audio AMP, Fan
+3VS
SUSB#
ISA I/F Power, Clock Generator & Buffer (W137)
+RTCVCCS
Nil
RTC
3.4.2
Power Management Mode Transition Flow Chart
From a user-visible level, the system can be thought of as being one of the states in the
following diagram:
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