FIC a440 Manual Do Serviço

 

Hardware Functional Overview 

 

FIC A440 Series Service Manual                                                                  4-23 

 
 

 

The BIOS must meet the following general Power Management requirements: 

  Refers to the portion of the firmware that is compatible with the ACPI specifications. 

  Support for Suspend-to-RAM (S3 state) and Suspend-to-Disk mode (S4 state). 

  Support the Wake up event from Modem Ring in S2~S5 state. This is enabled by a ACPI driver or application. 

  Support the Wake up event from RTC Time/Date alarm in S2~S5 state. This is enabled by a CMOS Setup option. 

  Power Management must not substantially affect or degrade system performance. 

 

Global system states (Gx states) apply to the entire system and are visible to the user.  

Following is a list of the system states: 

Power is removed from most of system components except Suspend wakeup logic in PIC and RTC. 

CPU in stop clock mode (core logic in stop clock mode also) 

Clock chip in Power down Mode 

VGA chip enter suspend mode, LCD power is removed, 

PCMCIA chip enter sleep mode, 

Hard disk enter sleep mode, 

CD-ROM enter sleep mode, 

Modem in power down mode, 

LAN is in power down mode 

G0 - 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. 

 

Sleeping states (Sx states) are types of sleeping states within the global sleeping state, G1. The Sx states are briefly defined 
below. For a detailed definition of the system behavior within each Sx state, refer to ACPI specification section 7.5.2. For a 
detailed definition of the transitions between each of the Sx states, refer to ACPI specification section 9.1.