User Guide

Software Functional Overview
FIC M785 Service Manual 3-17
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:
• Compliant with ACPI 1.0B / ACPI 2.0 Specification
• Support for Suspend-to-RAM and Suspend-to-Disk mode
• Support for Resume on External Modem Ring while in S3 Mode
• Support for Resume on Internal Modem Ring while in S3 / S4 Mode
• Support for LAN Remote Power while in S3 / S4 Mode
• Power Management must not substantially affect or degrade system performance
• Power Management must be OS independent
• Support resume on Time/Date
• Support Wireless LAN wake up
• Support Internet / Mail button wake up
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:
Power Group Power Control Pin Controlled Devices
+B Nil IMM, (9V~20V)
+3VA Nil SIS962 (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), ENE KB3886, MAX3243
+5VS SUSB# FLASH ROM, HDD, CD-ROM, USB, Internal K/B,
Glide Pad, External P/S2 Mouse, Audio AMP, Fan
+3VS SUSB# SIS962 (ISA I/F Power), Clock Generator & Buffer
(W137)
+RTCVCCS Nil SIS962 (RTC)
3.5.3 Power Management Mode
l Full On Mode
The system state where no devices are power managed and the system can respond to
applications with maximum performance.
l Doze mode
The CPU clock is slow down and all other devices are full-on.
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