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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:
Power Group Power Control Pin Controlled Devices
+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
3-18 FIC M295 / M296 Service Manual