FIC M295 User Manual

 

Software Functional Overview 

3.5 

Power Management 

This section provides the Power Management software function of the notebook. 

3.5.1  General Requirements 

The BIOS meet the following general Power Management requirements:

 

Refers to the portion of the firmware that is compatible with the ACPI 1.0 specifications. 
 
Support for Suspend-to-RAM (S3 state) and Suspend-to-Disk mode (S4 state). 
 
Support the Wake up event from Modem Ring in S3~S4 state. This is enabled by a CMOS 
Setup option. 
 
Support the Wake up event from RTC Time/Date alarm in S3~S4 state. This is enabled by 
a CMOS Setup option. 
 
Power Management must not substantially affect or degrade system performance. 

3.5.2  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: 
 

+B Nil 

IMM, 

(9V~20V) 

+3VA 

Nil 

SIS961 (RTC I/F), Internal Modem Ring, PMU08 

+12V 

PWRON 

PCMCIA Card, AC97 Codec 

+5V 

PWRON 

PCMCIA Slot 5V 

+3V 

PWRON 

VGA, PCMCIA, PCMCIA Slot 3V, DRAM, 
Twister(DRAM I/F), M38869M8, MAX3243 

+5VS 

SUSB# 

FLASH ROM, HDD, CD-ROM, USB, Internal K/B, 
Glide Pad, External P/S2 Mouse, FDD, Audio AMP, 
Fan 

+3VS 

SUSB# 

SIS961 (ISA I/F Power), Clock Generator & Buffer 
(W137) 

+RTCVCCS Nil SIS961 

(RTC) 

3.5.3  Power Management Mode 

 

z 

Full On Mode 

 
      

 

The system state where no devices are power managed and the system can respond to 

applications with maximum performance. 
 

z 

Doze mode 

 

 
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FIC M295 / M296 Service Manual