Product Description 
 39 
1.14.1.2  Wake-up Devices and Events 
Table 8 lists the devices or specific events that can wake the computer from specific states. 
Table 8.  Wake-up Devices and Events 
These devices/events can wake up the computer…  …from this state 
LAN   S1, S3, S4, S5 
(Note)
 
Modem (back panel Serial Port A)  S1, S3 
PME# signal  S1, S3, S4, S5 
(Note)
 
Power switch  S1, S3, S4, S5 
PS/2 devices  S1, S3 
RTC alarm  S1, S3, S4, S5 
USB S1, S3 
WAKE#  S1, S3, S4, S5 
Note:  For LAN and PME# signal, S5 is disabled by default in the BIOS Setup program.  Setting this option to Power On 
will enable a wake-up event from LAN in the S5 state. 
 
NOTE 
The use of these wake-up events from an ACPI state requires an operating system that provides full 
ACPI support.  In addition, software, drivers, and peripherals must fully support ACPI wake 
events. 
1.14.2 Hardware Support 
 CAUTION 
Ensure that the power supply provides adequate +5 V standby current if LAN wake capabilities and 
Instantly Available PC technology features are used.  Failure to do so can damage the power 
supply.  The total amount of standby current required depends on the wake devices supported and 
manufacturing options.   
The board provides several power management hardware features, including: 
•  Power connector 
•  Fan connectors 
•  LAN wake capabilities 
•  Instantly Available PC technology 
•  Resume on Ring 
•  Wake from USB 
•  Wake from PS/2 keyboard 
•  PME# signal wake-up support 
•  WAKE# signal wake-up support 
LAN wake capabilities and Instantly Available PC technology require power from the +5 V 
standby line. 
Resume on Ring enables telephony devices to access the computer when it is in a power-managed 
state.  The method used depends on the type of telephony device (external or internal).