GPIO C2 CHGLED
Charge Battery indicator :
1 : charging Battery
0 : Stop charging Battery
GPIO C3 N.C.
--
--
No Use
GPIO C0 N.C.
--
--
No Use
3.4
ACPI
General Requirements
The BIOS must meet the following general Power Management requirements:
Refers to the portion of the firmware that is compatible with the ACPI 1.0b specifications.
Support for Power ON(S0 state), Suspend-to-RAM (S3 state) , Suspend-to-Disk mode (S4
state) and Soft OFF(S5 state).
Global System State Definitions
Global system states (Gx states) apply to the entire system and are visible to the user.
Following is a list of the system states:
G0/S0 - Working:
A computer state where the system dispatches user mode (application) threads and
they execute. In this state, devices (peripherals) are dynamically having their power
state changed. The user will be able to select (through some user interface) various
performance/power characteristics of the system to have the software optimize for
performance or battery life. The system responds to external events in real time. It is
not safe to disassemble the machine in this state.
G1 - Sleeping:
A computer state where the computer consumes a small amount of power, user
mode threads are not being executed, and the system
“
appears
”
to be off (from an
end user
’
s perspective, the display is off, etc.). Latency for returning to the Working
state varies on the wakeup environment selected prior to entry of this state (for
example, should the system answer phone calls, etc.). Work can be resumed without
rebooting the OS because large elements of system context are saved by the
hardware and the rest by system software. It is not safe to disassemble the machine
in this state.
G2/S5 - Soft Off:
A computer state where the computer consumes a minimal amount of power. No
user mode or system mode code is run. This state requires a large latency in order to
return to the Working state. The system
’
s context will not be preserved by the
hardware. The system must be restarted to return to the Working state.
It is not safe
to disassemble the machine.
G3
–
Mechanical Off:
A computer state that is entered and left by a mechanical means. It is implied by
the entry of this off state through a mechanical means that the no electrical current is
TECHNICAL SERVICE MANUAL
Prestigio Cavaliere 142
43
