Power Management - Prestigio VISCONTE 1300 Technical & Service Manual

TECHNICAL SERVICE MANUAL
IDSEL PCI Device
Bus#
0
0
0
0
0
0
0
0
0
AD20 1
AD26 1
SMBus Devices
The SMBus is a two-wire interface through which the system can communicate with power-related chips. The BIOS
should initialize the SMBus devices during POST.
SMBus Device
ICH-M
SO-DIMM SPD

2.3 Power Management

2.3.1General Requirement
The purpose of the Power Management (PM) is that trying to reduce the power consumption in the system then extent the
battery life, increase the time to use without recharging the battery. The Advanced Configuration and Power Interface (ACPI)
specification is the latest and better PM method and will replace the traditional APM and PNP functions. ACPI is a kind of
Operating System Directed Power Management (OSPM), that is, the OS will control the system/devices to enter proper
power-saving mode and determine when to do it.
The BIOS should provide the ACPI table that is written by ASL language, to tell the OS how to setup and control the
system/devices' the configuration and the power-saving mode. So the system H/W, BIOS and drivers must be meet the ACPI
specification:
ACPI 1.0b compliant
Supporting processor power state C0, C1 and C2
Supporting system state S0, S3, S4 and S5
First of all, the next section will depict the power management state transition, then describe the definition
for each system state
Device# Func# INT Pin Device Name
0 0
1 0
31 2
31 3
27 0
29 0
29 1
29 2
29 7
4 0
10 0
Host/Slave
Host
Slave
Intel 945GM
Intel GMCH Main Memory Control
IDE
SMBUS Controller
HD Audio Codec Controller
USB 1.0 Controller #1
USB 1.0 Controller #2
USB 1.0 Controller #3
USB 2.0 Controller
CareBus Bridge
IEEE1394
Address
10h
A2h
8
Prestigio Visconte 1300