
APC-3X18 User Manual
Pin1+ Ground: HDD LED, They are used to connect hard disk activity LED. The
LED blinks when the hard disk is reading or writing data.
Pin2+Pin4: POWER LED, They are used to connect power LED. When the
system is powered on or under S0/S1 state, the LED is normally on, when the
system is under S4/S5 state, the LED is off.
Pin3: USB01 OC-, “USB01_OC-“ Signal.
Pin5: USB23 OC-, “USB23_OC-“ Signal.
Pin7+Ground: RESET Button, They are used to connect reset button. The two
pins are disconnected under normal condition. You may short them
temporarily to realize system reset.
Pin6+Pin8: POWER on/off Button, They are used to connect power switch
button. The two pins are disconnected under normal condition. You may short
them temporarily to realize system startup & shutdown or awaken the system
from sleep state.
Pin9+Pin10: BUZZER, They are used to connect an external buzzer.
Pin11~Pin18: GPIO IN/GPIO OUT, General-purpose input/output port, it
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