Ampro Corporation XTX 820 - Manual (Page 66)

Chapter 3 Hardware
60 Reference Manual XTX 820
• 4th state is a hibernate or suspend-to-disk state (S4).
In this state there are no internal operations taking place, except for the internal RTC. This
includes no activity for the RAM, CPU, CD-ROM, or hard disk drives. The XTX 820 appears to
be off, including any power LED indicators. 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 XTX 820 must be fully powered on and the
OS transitions the XTX 820 into this sleep state (S4) under user control.
♦ To exit this sleep state a wake up event, such as the Power-On switch, is used to wake up the
XTX 820 and restore full operation, including any power LED indicators. Typically, pressing
the Power-On switch for less than 4 seconds (default) will restore full operation.
• 5th state is the normal power Off or shutdown (S5).
All activity stops except the internal clock, unless the power cord is removed from the power source.
♦ To go to a fully powered down state (soft off), the XTX 820 must either be powered On, or in
a sleep state, and then the Power-On switch is pressed for more than 4-to-6 seconds.
♦ To go to a fully powered up state, press the Power-On 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 XTX 820 at certain times. Refer to the OS vender’s documentation for power
management under the ACPI standard.
Wake Up Activities
The wake up events listed in Table 3-31 can be used to wake up the XTX 820 from S3 or any of the
other states mentioned.
Table 3-31. Wake Up Activities and Conditions
Signal/Device Condition
SMBALRT* When set to Always
GEP2* (RI*) If this pin is configured as Sleep button in BIOS Setup.
GEP1* If this pin is configured as a LID switch in BIOS Setup and used to transition
to S3. A release of this signal wakes the system from S3.
PCE_WAKE* When set to Always
Integrated LAN The LAN driver configuration allows the system to wake from S3/S4 and
even S5 through direct addressing, magic packets, or link status changes.
PS/2 Keyboard &
Mouse If powered by standby voltage on baseboard.
Integrated USB If configured as S3/S4 wake device in BIOS Setup and if powered by
standby voltage. Example, USB mouse could wake the system.
PME* Activated by Windows ACPI system if the PCI driver indicates that it
manages a device capable of waking up the system.
Note: The signals marked with * = Negative true logic.