The
AZZA
P4X2-A MAINBOARD SERIES
Page 21
2.4.12. SMB (System Management Bus) Connector
Connector:
CN 42
Type:
4 pin
The SMB is a 2-wire specification which allows for communications between an external UPS
or other power devices and a computer. Each P4X2-A mainboard has a SMB connector on-
board, which can be connected to other SMB devices .
2.5.1 PW: Power On / Off and External Suspend Switch Connector
The Power On/Off connector has two functions. It can be the Power Switch or Suspend
Switch of your PC system. You can either choose “
Delay 4 Sec or Instant OFF
” (Please
refer to the Award BIOS setup instructions in Chapter 3).
Option 1:
If you choose “
Delay 4 Sec.
” In the BIOS CMOS Setup, the function of “PW”
will be:
A. When the system power is "OFF", press this switch, the system will power on.
B. When system power is "ON”, you can select two different modes: -
Mode 1:
Press and hold the Power ON button for less than 4 seconds and then release it.
The system will be turned into Suspend mode (turned into the GREEN mode) When the
system is in the Suspend mode:-
!""
Press the Power on button (less than 4 seconds), the system will return to Full-ON
mode.
2.5. System Panel Buttons and LED Connectors
The following System Panel Buttons and LED
Connectors can be found at the front of the
mainboard on the left hand side.
PW
= Power On/Off and
Suspend Switch Connector
S5L
= Standby LED Connector
HL
= HDD LED Connector
RS
= Reset Button LED Connector
PIN 1
S5L:
HL:
+5V DC Pull Up Ground
RS:
Reset Control
PW:
+5V DC Pull Up
Ground
Ground
Top View of the System
Panel and LED Connectors
Clock
Ground
Data
+ 5V
1 Clock
2 No Connection
3 Ground
4 Data
5 +5V DC
Top View of an SMB Connector
Front View of an SMB Connector
Hard
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Hardware Installation
