FIC M296 Stand by mode, Suspend to RAM mode STR, Suspend to Disk mode STD, Soft off mode Soff

Software Functional Overview

The CPU clock is slow down and all other devices are full-on.

zStand by mode

A suspend state where all motherboard components are still powered-on except for the system clock generator device. The PCI and CPU buses are driven to the inactive idle state. The system memory is powered and refreshed by the memory bridge, and the graphics frame buffer is powered and refreshed by the graphic chip. The system provides a 32Khz clock (SUSCLK) in this suspend mode to support refresh of these memory subsystems. Only an enabled “resume event” can bring the system out of the stand by state. The SIS 961 also provides a resume timer that allows the system to resume after a programmed time has elapsed.

zSuspend to RAM mode (STR)

A suspend state where all motherboard components are powered-off. The CPU/L2 and PCI busses are powered off. All devices connected to the CPU/L2 and PCI busses must either be powered-off or isolate their bus interfaces. The system memory is powered and refreshed by the memory bridge, and the graphics frame buffer is powered and refreshed by the graphics chip. The system provides a 32 kHz clock (SUSCLK) in this suspend mode to support refresh of these memory subsystems. Only an enabled “resume event” can bring the platform out of the suspend to RAM (STR) state.

zSuspend to Disk mode (STD)

A suspend state where the context of the entire system is saved to disk, all motherboard components are powered-off, and all clocks are stopped. Any enabled “resume event”, such as PowerBTN or RTC, can bring the platform out of the suspend to disk (STD) state.

zSoft off mode (SOFF)

The This is the same as suspend to disk except the context of memory is not saved. The system will resume from Soft Off as if a hard reset had occurred.

zMechanical off mode

All power except the RTC has been removed from the system.

FIC M295 / M296 Service Manual 3-19