Asus P5-99B - Manual (Page 37)

III. HARDWARE SETUP
ASUS P5-99B User’s Manual 37
13. ATX Power Switch/Soft Power Switch Lead (PWR, 2 pins)
The system power can be controlled by a momentary switch connected to this
lead. Pushing the button once will switch the system between ON and SLEEP.
Pushing the switch while in the ON mode for more than 4 seconds will turn the
system off. The system power LED shows the status of the system’s power.
14. System Management Interrupt Switch Lead (SMI, 2 pins)
This allows the user to manually place the system into a suspend mode or “Green”
mode where system activity is decreased to save electricity and expand the life
of certain components when the system is not in use. This 2-pin connector con-
nects to the case-mounted suspend switch. If you do not have a switch for the
connector, you may use the “Turbo Switch”. SMI is activated when it detects a
short to open moment and therefore leaving it shorted will not cause any prob-
lems. This may require one or two presses depending on the position of the
switch. Wake-up can be controlled by settings in the BIOS but the keyboard will
always allow wake-up (the SMI lead cannot wake up the system). If you want to
use this connector, set “Suspend Mode” under Power Management Setup of
BIOS SETUP section to the preferred time after which the system must go into
suspend mode when you press the switch.
15. System Power LED Lead (PLED, 2 pins)
This 3-pin connector connects the system power LED, which lights when the
system is powered on and blinks when it is in sleep mode.
16. Reset Switch Lead (RESET, 2 pins)
This 2-pin connector connects to the case-mounted reset switch for rebooting
your computer without having to turn off your power switch This is a preferred
method of rebooting in order to prolong the life of the system’s power supply.
17. Message LED Lead (MLED, 2 pins)
This indicates whether a message has been received from a fax/modem. The
LED will remain lit when there is no signal and blink when there is data transfer
or messages waiting in the inbox. This function requires ACPI OS support.
18. Keyboard Lock Switch Lead (KEYLOCK, 2 pins)
This 2-pin connector connects to the case-mounted key switch to allow key-
board locking.
19. Speaker Connector (SPEAKER, 4 pins)
This 4-pin connector connects to the case-mounted speaker.
P5-99B System Panel Connections
* Requires an ATX power supply.
PLED
Ground
TB_LED
PWR
+5 V Keylock +5V Speaker
Speaker
Connector
Power LED
Ground
+5 V
Reset SW
SMI Lead
Message LED
ExtSMI#
Ground Reset
Ground Ground Ground
Keyboard Lock
ATX Power
Switch*
0 1
Connectors
III. H/W SETUP