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24 Chapter 1
System LED Indicator
Power Specification
Mechanical off is a condition where all power except the RTC battery has been removed from the system.
1. Initial to On state: When the AC adapter or Battery pack has been plugged into the system, the WPCE781
will be reset and initial all output pins then the system goes into Initial state and waiting for power on event. If
the power button is pressed then the system will go into the ON state.
2. ON to Standby state: The system will go into the Standby state when PCH receives the Standby command.
3. ON to Suspend state: The system will go into Suspend state when PCH receives the Suspend command.
4. ON to Hibernate state: The system will go into Hibernate state when PCH receives the Hibernat command.
5. ON to Soft Off state: The system will go into Soft Off state when PCH receives the Soft off command.
6. Standby to ON state: The system will go into ON state when the system receives any wake up events, for
example, keyboard and mouse.
7. Suspend to ON state: The system will go into ON state when the power button is pressed.
8. Hibernate to ON state: The system will go into ON state when the power button is pressed.
9. Soft Off to ON state: The system will go into ON state when the power button is pressed.
Item Specification
Lock Indicates lock status for Caps lock and Num lock
System state • Green color (and blue color) solid on: System on
• Green color (and blue color) and amber color off: System off
• Amber color blinking: S3 state
HDD access state Reflects the activities of the HDD
Wireless state Blue (or amber) color if a wireless device is active
Power button backlight • Green color (and blue color) solid on: System on
• Green color (and blue color) and amber color off: System off
• Amber color blinking: S3 state
Battery state Charging
• Amber solid on - Battery charging with AC
• Green (or blue) color solid on - Battery full
• Amber blinking - Battery abnormal stop charge or batter in low
power state
Discharging
• Amber and blinking - Battery in critical low state
• Amber color off - Discharging state
Item
Specification
Initial On
Stand
by
Suspend Hibernate Soft Off
Initial 1
ON (S0) 2 3 4 5
Standby (S1) 6
Suspend (S3) 7
Hibernate (S4) 8
Soft Off (S5) 9