4.4
Connectors
This section describes and illustrates the connectors on the motherboard.
See page 19 for the description of rear panel connectors.
1.
Front panel USB connector (10-1 pin USB56)
The USB56 header is connected to the USB_2 connector of the front panel I/O daughterboard.
USB56
10
5
6
1
®
P4R8T
P4R8T USB Port
2.
CPU and chassis fan connectors (3-pin CPU_FAN, CHA_FAN)
The fan connectors support the proprietary CPU fan and chassis fan.
Connect the fan cable to the connector matching the black wire to the ground pin.
52
CHA_FAN
GND
+12V
Rotation
CPU_FAN
Rotation
+12V
GND
®
P4R8T
P4R8T 12-Volt Cooling Fan Power
Do not forget to connect the fan cables to the fan connectors. Lack of sufficient air flow within the system may damage the motherboard components. These are not jumpers! DO NOT place jumper caps on the fan connectors!
Chapter 4: Motherboard info
3.
IDE connectors (40-1 pin PRI_IDE, SEC_IDE)
The PRI_IDE connector is for the UltraATA100 IDE hard disk ribbon cable. Connect the cable’s blue connector to the IDE connector, then connect the gray connector to a secondary master device (optical drive) and the black connector to the UltraATA100 primary master device (hard disk drive). Configure the hard disk drive and the optical drive as primary/secondary master device by adjusting their jumper settings. Refer to their respective documentation for details.
Pin 20 on the IDE connector is removed to match the covered hole on the UltraATA cable connector. This prevents incorrect orientation when you connect the cables.
For UltraATA133 IDE devices, use an 80-conductor IDE cable.
NOTE: Orient the red markings
(usually zigzag) on the IDE ribbon cable to PIN 1.
®
P4R8T
P4R8T IDE Connectors
PIN 1
4.
Internal audio connectors (4-pin AUX1, CD1)
These connectors allow you to receive stereo audio input from sound sources such as a CD-ROM, TV tuner, or MPEG card.
®
P4R8T
P4R8T Internal Audio Connectors
Left Audio Channel
Ground
Right Audio Channel
AUX(White) CD(Black)
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5.
Floppy disk drive connector (34-1 pin FLOPPY1)
This connector supports the provided floppy drive ribbon cable. After connecting one end to the motherboard, connect the other end to the floppy disk drive. (Pin 5 is removed to prevent incorrect insertion when using ribbon cables with pin 5 plug).
FLOPPY
54
®
P4R8T
P4R8T Floppy Disk Drive Connector
PIN 1
NOTE: Orient the red markings on the floppy ribbon cable to PIN 1.
6.
ATX power connectors (20-pin ATXPWR, 4-pin ATX12V)
These connectors are for the 20-pin and 4-pin power plugs from the power supply unit. The plugs from the power supply unit are designed to fit these connectors in only one orientation. Find the proper orientation and push down firmly until the connectors completely fit.
See page 39 for details on the power supply unit.
ATXPWR
+12.0Volts
+5V Standby
Power Good
Ground
+5.0 Volts
Ground
+5.0 Volts
Ground
+3.3 Volts
+3.3 Volts
+5.0 Volts
+5.0 Volts
-5.0 Volts
Ground
Ground
Ground
Power Supply On
Ground
-12.0Volts
+3.3Volts
ATX12V
+12V DC COM
®
P4R8T
P4R8T ATX Power Connector
+12V DC COM
Chapter 4: Motherboard info
7.
Front panel audio connector (10-1 pin FP_AUDIO)
This interface is connected to the J1 connector in the front panel I/O daugtherboard to support the front panel audio I/O ports.
FP_AUDIO
®
P4R8T
P4R8T Front Panel Audio Connector
8.
Digital audio connector (4-1 pin SPDIF_OUT)
The SPDIF_OUT is connected to the SPDIF_OUT2 connector in the front panel I/O daughterboard to support the optical S/PDIF port.
SPDIF OUT
®
P4R8T
P4R8T Digital Audio Connector
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56
9.
I/O extension module (22-pin IOC_MB)
This connector is for the CGAEX extension module.
COM1
CGAEX
IOC_DC
®
GAME
®
P4R8T
P4R8T IOC_MB Connector
10. Optional modem connector (10-1 pin MDC)
This interface connects to the JP2 connector in the optional modem module.
®
P4R8T
P4R8T MDC Connector
MDC
GND
+3VSB
AC_RST#
AC_SDOUT
1
PHONE
AC_SYNC
AC_SDIN1
GND
MDC_BITCLK
Chapter 4: Motherboard info
11. System panel connector (8-1 pin PANEL)
This connector accommodates several system front panel functions.
IDE_LED
Power LED
PANEL
®
P4R8T
P4R8T System Panel Connector
ATX Power
Switch*
*
Requires an ATX power supply.
• Power LED Lead
This 2-pin connector connects to the system power LED. The LED lights up when you turn on the system power, and blinks when the system is in sleep mode.
• ATX Power Switch
This connector connects a switch that controls the system power.
Pressing the power switch turns the system between ON and SLEEP, or ON and SOFT OFF, depending on the BIOS or OS settings.
Pressing the power switch while in the ON mode for more than 4 seconds turns the system OFF.
• IDE LED Lead
This 2-pin connector supplies power to the hard disk drive activity
LED. The read or write activities of any device connected to the primary or secondary IDE connector cause this LED to light up.
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58 Chapter 4: Motherboard info
Chapter 5
This chapter tells how to change system settings through the BIOS
Setup menus and describes the
BIOS parameters.
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