Asus Eee PC 4G Service Overview page 74

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.
6.2.5 Suspend 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 Power switch or RTC, can
bring the platform out of the suspend to disk (STD) state.
6.2.6 Soft off mode (SOFF)
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.
6.2.7 Mechanical off mode (MOFF)
All power except the RTC has been removed from the system.
6.3 PMU mode transition event
The following table summarizes the entry events and wake-up events of each power management mode.
Power State Entry Event
Doze Doze Time out
Stand by Stand by Time out
Stand by hot key pressed
STR Suspend Time out
STR hot key pressed
Suspend button
Battery Low
STD Suspend Time out
STD hot key pressed
Hibernate
Battery Low
Soft Off Power button
Execute
command
Wake up Event
Predefined Memory/IO range access
Ring Indicator Keystroke
Mouse movement
IRQ 1-15
Predefined Memory/IO range access
Battery Warning
Battery Low
Ring Indicator
Keystroke
Mouse movement
Schedule Alarm
Power Button
Ring Indicator
Keystroke (Int. KB)
Schedule Alarm
Power Button
Schedule Alarm
Power Button
Windows shutdown Schedule Alarm
5-32
Hardware Technical Specification