Product Description 
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1.15.1.2  Wake-up Devices and Events 
Table 7 lists the devices or specific events that can wake the computer from specific 
states. 
Table 7.  Wake-up Devices and Events 
These devices/events can wake up the computer…  …from this state 
Power switch  S1, S3, S4, S5 
RTC alarm  S1, S3, S4, S5 
LAN   S1, S3, S4, S5 
USB S1, S3 
PME# signal  S1, S3, S4, S5 
WAKE# signal  S1, S3, S4, S5 
PS/2  S1, S3, S4, S5 
Serial S1, S3 
Notes: 
•  S4 implies operating system support only. 
•  USB ports are turned off during S4/S5 states. 
 
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.