Chapter 3
Hardware
ReadyBoard 910
Reference Manual
37
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3rd state is Suspend to RAM or Standby [Windows] (S3).
In this state, main memory (RAM) and the internal RTC (Real Time Clock) are the only devices where
power is maintained. This state (Suspend to RAM) stores the state of the operating system prior to
shutdown including all open applications and open documents, etc. in main memory. This allows users
to resume their work exactly where they left off just prior to entering this state (S3) when the system
restores power and the contents of main memory.
This state takes longer to restore and uses less power than S1 or S2, but if AC power is completely lost,
the contents of main memory (RAM), including any changes to documents or data stored in RAM
during S3, is also lost.
♦
To enter the Suspend to RAM (S3) or Standby state, the computer must be fully powered on and
the OS transitions the computer into this sleep state under user control.
♦
To exit this sleep state, typically pressing the Power On switch for less then 4 seconds (default) will
restore full operation.
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4
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state is a hibernate or suspend-to-disk state (S4).
In this state, no internal operations take place, except for the internal RTC. This includes no activity for
the CPU, CD-ROM, or hard disk drives. The ReadyBoard 910 appears to be off, including the external
Power-On LED if connected. Your system will take longer to wake-up in this sleep state, however,
since your data is saved to the disk, it is more secure and should not be lost in the event of a power
failure.
♦
To enter a hibernate or suspend-to-disk state, the ReadyBoard 910 must be fully powered on while
the OS transitions the ReadyBoard 910 into this sleep state (S4) under user control.
♦
To exit this sleep state, typically pressing the power switch for less than 4 seconds (default) will
restore full operation.
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5
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state is the normal power off or shutdown (S5).
All activity stops, except the internal clock, if there is a backup battery installed. Removing the power
cord from the power source ensures all activity is stopped, except the internal clock.
♦
To go to a fully powered down state, the ReadyBoard 910 must either be powered on, or in a
sleep state, and then the Power On/Off switch is pressed for more than 4 seconds.
♦
To go to a fully powered up state, press the power switch for less than 4 seconds (default) and
full operation is restored.
The OS may provide additional programming features to change the activation time for each state, and to
shutdown or transition the ReadyBoard 910 at certain times, depending on the way the OS interface is
programmed. Refer to the OS vender’s documentation for power management under the ACPI standard.
NOTE
Some operating systems use the keyboard, mouse, Wake-on-Ring (serial port),
and Wake-on-LAN (Ethernet port) as an activity to wake up the system from a
sleep state. Refer to
for the wake up activity conditions supported by
the ReadyBoard 910.
