FCC Information and CopyrightThis equipment has been tested and found to comply with thelimits of a Class B digital device, pursuant to Part 15 of the FCC
Rules. These limits are designed to provide reasonable protection
against harmful interference in a residential installation. Thisequipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions, may cause
harmful interference to radio
communications. There is no guarantee that interference will notoccur in a particular installation.
The vendor makes no representations or warranties with respect
to the contents here of and specially disclaims any implied
warranties of merchantability or fitness for any purpose. Further
the vendor reserves the right to revise this publication and to
make changes to the contents here of without obligation to notify
any party beforehand.
Duplication of this publication, in part or in whole, is not allowed
without first obtaining the vendor’s approval in writing.
The content of this user’s manual is subject to be changed without
notice and we will not be responsible for any mistakes found in
this user’s manual. All the brand and product names aretrademarks of their respective companies.

Table of Contents
Notice .............................................................................................1
Mainboard Features ...............................................................2
1. Features Introduction......................................................................... 2
1-1. Hardware............................................................................................................ 2
1-2. BIOS & Software............................................................................................ 5
1-3. Package Contents.......................................................................................... 5
2. Mainboard Configuration................................................................... 6
2-1. Layout of U8568 ............................................................................................ 6
2-2. Component Index ......................................................................................... 7
3. CPU Configuration ............................................................................... 8
3-1. CPU Socket 478 Configuration Steps:............................................... 8
3-2. CPU Fan Header: JCFAN1....................................................................... 10
3-3. System Fan Header: JSFAN1 (Optional) ....................................... 10
3-4. Frequency Selection: JCLK1.................................................................. 10
3-5. Clock Ratio Selection: JCLK2................................................................ 10
4. Jumpers, Headers & Connectors.................................................. 11
4-1. Front Panel Connector: JPANEL1 ....................................................... 12
4-2. ATX 20-pin Power Connector: JATXPWR1.................................... 14
4-3. ATX 12V Power Connector: JATXPWR2 ......................................... 14
4-4. Hard Disk Connectors: IDE1/IDE2.................................................... 15
4-5. Floppy Disk Connector: FDD1.............................................................. 15
4-6. Wake On LAN Header: JWOL1 ............................................................ 15
4-7. Clear CMOS Jumper: JCMOS1............................................................. 16iTable of Contents
4-8. CNR Codec Primary/Secondary Selection: JCODECSEL....... 16
4-9. Front USB Header: JUSB20B (with USB2.0 spe) (Optional)174-10. Front USB Header: JUSB3 (with USB1.0 spe)......................... 17
5. RAM Module Configuration ............................................................. 18
5-1. DIMM Features.............................................................................................. 18
5-2. DIMM Module Configuration.................................................................. 19
6. Peripheral Port Features ................................................................. 21
6-1. PS/2 Mouse / Keyboard Connector: JKBMS1 ............................. 21
6-2. USB & LAN Port Connectors: JUSBLAN1 ....................................... 22
6-3. Serial and Parallel Interface Ports...................................................... 24
6-4. Game (Joystick/MIDI) Port Connector: JAUD_GAME ............ 26
6-5. Audio Port Connectors: JSPKR1/JLIN1/JMIC1............................ 26
6-6. Audio Subsystem......................................................................................... 27ii

Mainboard Features

NoticeIntroduction of system
This mainboard is designed to take advantage of the latest industry
technology to provide you with the ultimate solution in dataprocessing. In the tradition of its predecessors, this mainboard
continues a commitment to reliability and performance and strives
for full compliance and compatibility with industry software andhardware standards.

U8568 Features:
1.Contains on board I/O facilities that include two serial ports, a parallel
port, a PS/2 mouse port, a PS/2 keyboard port, audio ports, USB
ports and a game port.
2.Contains on board IDE facilities for IDE devices such as hard disks
and CD-ROM Drives.
3.Supports the Intel Pentium ® 4 processor, a leading edge processor.
Complies with PC ATX form factor specifications.
4.Supports popular operating systems such as Windows NT, Windows
2000, Windows ME, Windows XP, Novell, LINUX and SCO UNIX.

1

Mainboard Features

Mainboard Features
1. Features Introduction
1-1. Hardware
CPU:
1.Provides Socket-478.
®
2.Supports the Intel Pentium 4 processor providing the new generation power
for high-end workstations and servers.

Speed:
1.Running at 400/533 MHz Front Side Bus frequency, use chipset VT8753E(P4X266E) (Optional).
2.Running at 400 MHz Front Side Bus frequency, use chipset VT8753(P4X266).
3.Supports up to 2.53 GHz CPU core speeds.
4.The 33MHz 32 bit PCI 2.2 compliant.
5.The 66MHz AGP 2.0 compliant interface supports 1x, 2x and 4x data transfer
mode.

Chipset:1.Chipset – North Bridge: VIA VT8753/ E (P4X266/ E)
South Bridge: VIA VT8233A.
2.Chipset – Winbond W83697HF.

DRAM Memory:
1.Supports 100MHz or 133MHz SDRAM devices
2.Supports 200MHz, 266MHz DDR SDRAM devices.
3.Supports 64Mb, 128Mb, 256Mb and 512Mb technologies for x8 and 16
devices.
4.Max of 2 Double-Sided DIMMs SDRAM or DDR SDRAM with unbuffered /Registered.
5.The largest memory capacity is 2 GB.

2Mainboard Features

Shadow RAM:
Motherboard is equipped with a memory controller providing shadow RAM andsupport for ROM BIOS.

Green Functionality:
1.Supports Award BIOS ™ power management functionality.
2.Has a power down timer from 1 to 15 minutes.
3.Wakes from power saving sleep mode with any keyboard or mouse activity.

BUS Slots:
1.Contains 1 AGP slot.
2.Contains 1 CNR slot.
3.Contains 1 ACR slot
4.Contains 5 32-bit PCI bus slots

Flash Memory:
1.Supports flash memory functionality.
2.Supports ESCD functionality.

Built in IDE Facilities:
1.Supports four IDE hard disk drives.
2.Supports PIO Mode 4, Master Mode, and high performance hard disk drives.
3.Supports disk transfer rates up to 133 MB/second.
4.Supports Ultra DMA 33, Ultra DMA 66, Ultra DMA 100, Ultra DMA 133 Bus
Master Modes.
5.Supports IDE interface with CD-ROM.
6.Supports high capacity hard disk drives.
7.Supports LBA mode.

3

Mainboard Features

AC’97 Sound Codec Onboard:
1.AC-LINK protocol comfliance.
2.Compliant with AC’97 2.2 specification.
3.18-bit full duplex stereo ADC, DACs.
4.SNR>95 Bb throughmixer and DAC.
5.AC-3 playback required for PVD applications.

I/O facilities:
1.One multi-mode Parallel Port capable of supporting the following
specifications:Standard & Bidirection Parallel Port.
Enhanced Parallel Port (EPP).
Extended Capabilities Port (ECP).
Normal2.Supports two serial ports, 16550 UART.
3.Supports Infrared Data Transmission using IrDA.
4.Supports PS/2 mouse and PS/2 keyboard.
5.Supports 360KB, 720KB, 1.2MB, 1.44MB, and 2.88MB floppy disk drives.

Universal Serial Bus:
1.Supports two back panel Universal Serial Bus Ports and two front panel
Universal Serial Bus Ports.
2.Supports 480 MHz USB (2.0) (optional).

Hardware Monitor Function:
1.Monitors CPU Fan Speed.
2.Monitors System Voltage (optional).

Dimensions (ATX form-factor):
24.5cm x 30.5cm (WxL)

4

Mainboard Features

1-2. BIOS & Software
1.Award legal BIOS.
2.Supports APM1.2.
3.Supports USB Function.
4.Supports ACPI.
Operating System:
Offers the highest performance for MS-DOS, Windows NT, Windows 2000,
Windows ME, Windows XP, Novell, LINUX, and SCO UNIX etc.

1-3. Package Contents
1.HDD Cable.
2.FDD Cable.
3.Flash Memory Writer for BIOS Update.
4.USB Cable (Optional).
5.Rear I/O Panel for ATX Case (Optional).
6.Fully Setup Driver CD.

5

Mainboard Features

2. Mainboard Configuration
2-1. Layout of U8568
JKBMS1
Mouse &KB

JUSBLAN1

CPU1

Socket 478

USB & LANJCOM1JPRNT 1

DDR1
DDR2
SDR1
SDR2

Parallel Port

CPU

Game Port

MIC Line SpeakerIn
In O ut

JCOM2
JVGA1
JATXPWR2

U13
JATXPWR1
2
1

VT8753/ E(P4X266/ E)

43

JAUD_GAME
U16

Realtek
RTL 8100

JAUDIO1
2
1

10
9

AGP SLOT
PCI1

PCI SLOT

JUSB3

PCI2
JCDIN2

1

1

1

PCI SLOT

VT8233AJTAD1JCDIN1

2
1

U19

PRIMARY IDE CONN.

PCI3

1

PCI SLOT

109SECONDA RY IDE CONN.

JCLK2
PCI4

BIOS

PCI SLOTFLOPPY DISK CONN.

PCI5

PCI SLOT
Winbond
W83697HF

VT6202USB2.0JUSB20B

ACR1

CNR SLOT

1091

AGP SLOT
CNR1

2JCMOS1 1

JCODECSEL
1
JWOL1
1

6

JSFAN1BAT1
2
1JPANEL1 24
23

1

Mainboard Features

2-2. Component Index

7

Mainboard Features

3. CPU Configuration
3-1. CPU Socket 478 Configuration Steps:
CPU FanCPU

1.

Pull the lever sideways away from the socket then raise thelever up to a 90-degree angle.

2.

Locate Pin A in the socket and look for the white dot or cutedge in the CPU. Match Pin A with the white dot/cut edge
then insert the CPU.

3.

Press the lever down. Then Put the fan on the CPU and buckle
it and put the fan’s power port into the JCFAN1, then tocomplete the installation.

8

Mainboard Features

CPU Configuration Layout

2
1

4
3

JCLK2
1

JSFAN119Mainboard Features

3-2. CPU Fan Header: JCFAN1
Pin No.

Assignment

1

Ground

2

+12V

3

Sense

3-3. System Fan Header: JSFAN1(Optional)
Pin No.

Assignment

1

Ground

2

+12V

3

Sense

3-4. Frequency Selection: JCLK1 (Optional)
CPU ClockPIN 1-2

PIN 3-4

100MHzOFF

ON

133MHzONOFF

3-5. Clock Ratio Selection: JCLK2(Optional)
JCLK2
1

Assignment
3

100 MHz

1-2 Closed
1

3

133 MHz

2-3 Closed

10

Mainboard Features

4. Jumpers, Headers & Connectors

JATXPWR1
JATXPWR2

2
1

10
JUSB3
9

IDE 1-2
FDD1

JUSB20B
2
10

1

BAT1

JCODECSEL

1
2
1

JWOL1

JCMOS1

1

1

11

9

JPANEL1

24
23

Mainboard Features

4-1. Front Panel Connector: JPANEL1
Pin Assignment Function Pin Assignment
No.
No.

Function

1

+5V

2

Sleep Control

Sleep

3

NA

Speaker

4

GroundButton5NAConnector

6

NA

NA

7

Speaker

8Power LED (+)

9

HDD LED (+)

Hard Drive

10 Power LED (+)

POWER

11

HDD LED (-)

LED

12 Power LED (-)

LED

13

GroundReset

14Power Button

Power-on

15

Reset Control

Button16

GroundButton

17

NA

18

KEY

19

NA

IrDA

20

KEY

IrDA

21

VCC5

Connector

22

GroundConnector

23

IRTX

24

IRRX

SPK (Speaker Connector)
An offboard speaker can be installed on the motherboard as amanufacturing option. An offboard speaker can be connected tothe motherboard at the front panel connector. The speaker(onboard or offboard) provides error beep code information during
the Power On Self-Test when the computer cannot use the videointerface. The speaker is not connected to the audio subsystemand does not receive output from the audio subsystem.

RST (Reset Button)
This connector can be attached to a momentary SPST switch. This
switch is usually open and when closed will cause themotherboard to reset and run the POST (Power On Self Test).

12

Mainboard Features

POW-LED (Power LED Connector)
This connector can be attached to an LED on the front panel of acomputer case. The LED will illuminate while the computer ispowered on.

HLED (Hard Drive LED Connector)
This connector can be attached to an LED on the front panel of acomputer case. The LED will flicker during disk activity. This disk
activity only applies to those IDE drives directly attached to thesystem board.

IR (Infrared Connector)
This connector is used to attach to an infrared sensing device.
After the IrDA interface is configured, connectionless data transfer
to and from portable devices such as laptops, PDAs is possible.

SLP (Sleep/Green Button)
This connector is used to conserve energy by powering down themonitor and the hard disk when not in use. To configure thisoption, you need to connect a button from the front panel to thisconnector. Depressing the button will power down the monitor
and hard drives until the system is invoked by any keyboard
activity, mouse activity,
modem activity or when the sleep
button is depressed again. APM (Advanced Power Management)
must be enabled in the system BIOS and the APM driver must be
loaded.

ON/OFF (Power Button)
This connector can be attached to a front panel power switch. The
switch must pull the Power Button pin to ground for at least 50 ms
to signal the power supply to switch on or off. (The time requiredis due to internal debounce circuitry on the system board). At
least two seconds must pass before the power supply willrecognize another on/off signal.

13

Mainboard Features

4-2. ATX 20-pin Power Connector:
JATXPWR1PIN

Assignment

PIN

Assignment

1

3.3V

11

3.3V

2

3.3V

12

-12V

3

Ground13

Ground

4

5V

14

PS_ON

5

Ground15

Ground65V

16Ground7

Ground17

Ground

8

PW_OK

18

-5V

9

5V_SB

19

5V

10

12V

20

5V

4-3. ATX 12V Power Connector: JATXPWR2
PIN

Assignment

PIN

Assignment

1

12V

3

Ground2

12V

4Ground14

Mainboard Features

4-4. Hard Disk Connectors: IDE1/IDE2
This mainboard has a 32-bit Enhanced PCI IDE Controller thatprovides PIO Mode 0~4, Bus Master, and Ultra DMA / 33, Ultra
DMA / 66,Ultra DMA / 100 functionality.
It has two HDD
connectors IDE1 (primary) and IDE2 (secondary).

• IDE1 (Primary IDE Connector)
The first hard drive should always be connected to IDE1. IDE1
can connect a Master and a Slave drive. You must configure thesecond hard drive on IDE1 to Slave mode by setting the jumper
accordingly.

• IDE2 (Secondary IDE Connector)
The IDE2 controller can also support a Master and a Slave drive.
The configuration is similar to IDE1. The second drive on thiscontroller must be set to slave mode.

4-5. Floppy Disk Connector: FDD1
The motherboard provides a standard floppy disk connector (FDC)
that supports 360K, 720K, 1.2M, 1.44M and 2.88M floppy disk
types. This connector supports the provided floppy drive ribbon
cables.

4-6. Wake On LAN Header: JWOL1Pin No.

Assignment

1

5V SB

2

Ground3

Wake up15

Mainboard Features

4-7. Clear CMOS Jumper: JCMOS1JCMOS1
1

Assignment
3

1-2 Closed
1

Normal Operation (default)

3

Clear CMOS Data

2-3 Closed

The following procedures are for resetting
the BIOS password. It is important tofollow these instructions closely.

※ Clear CMOS Procedures:
1. Remove AC power line.
2. Make JCMOS1 (2-3) closed.
3. Wait for five seconds.
4. Make JCMOS1 (1-2) closed.
5. Let AC power on.
6. Reset your desired password or clear the CMOS data.

4-8. CNR Codec Primary/Secondary
Selection: JCODECSELPin No.

Assignment

1-2On-board Primary Codec

2-3

CNR Primary Codec

16

Mainboard Features

4-9. Front USB Header: JUSB20B (withUSB2.0 spe) (Optional)(JUSB20B)
Pin
Assignment
1+5V(fused)3
USBP35
USBP3+
7
Ground
9
KEY

Pin
2
4
6
8
10

Assignment+5V(fused)
USBP4USBP4+
GroundNC

4-10. Front USB Header: JUSB3 (with USB1.0
spe)(JUSB3)
Pin
1
3
5
7
9

Assignment+5V(fused)
USBP2USBP2+
Ground
KEY

Pin
2
4
6
8
10

17

Assignment+5V(fused)
USBP3USBP3+
GroundNC

Mainboard Features

5. RAM Module Configuration
5-1. DIMM Features

DRAM Access Time: 2.5V DDR SDRAM PC1600/ PC2100 Typerequired.
or
3.3V SDR SDRAM PC100/PC133 Typerequired.

DDR
Devices used on

DIMM 1

DIMM

DIMM 2(2 Rows) (2 Rows)

x64/ x72 x64/ x72
64M (4Mx4x4banks)
256 M
256 M
64M (2Mx8x4banks)
128 M
128 M
64M (1Mx16x4banks)
64 M
64 M
128M (8Mx4x4banks)
512 M
512 M
128M (4Mx8x4banks)
256 M
256 M
128M (2Mx16x4banks) 128 M
128 M
256M (8Mx8x4banks)
512 M
512 M
256M (4Mx16x4banks) 256 M
256 M
512M (8Mx16x4banks) 512 M
512 M

SDR
Devices used on

DIMM 1

DIMM 2DIMM(2 Rows) (2 Rows)

64M (4Mx4x4banks)
64M (2Mx8x4banks)
64M (1Mx16x4banks)
128M (8Mx4x4banks)
128M (4Mx8x4banks)
128M (2Mx16x4banks)
256M (8Mx8x4banks)
256M (4Mx16x4banks)
512M (8Mx16x4banks)

x64/ x72 x64/ x72
256 M
256 M
128 M
128 M
64 M
64 M
512 M
512 M
256 M
256 M
128 M
128 M
512 M
512 M
256 M
256 M
512 M
512 M

18

Mainboard Features

5-2. DIMM Module Configuration

1.

The DIMM socket has a “Plastic Safety Tab” and the DIMM
memory module has an asymmetrical notch”, so the DIMM
memory module can only fit into the slot in one direction.

2.

Push the tabs out. Insert the DIMM memory modules into thesocket at a 90-degree angle then push down vertically so that it
will fit into place.

3.

The Mounting Holes and plastic tabs should fit over the edge
and hold the DIMM memory modules in place.
SDR

19

Mainboard Features

DDR

20

Mainboard Features

6. Peripheral Port FeaturesJKBMS1
PS/2
Mouse

PS/2
Keyboard

JUSBLAN1
LAN (Optional)USB

JPRNT1

JAUD_GAME

ParallelGame Port

COM1

COM2

JCOM1

JCOM2

SpeakerOutLine InMic
In

JSPKR1 JLIN1 JMIC1

6-1. PS/2 Mouse / Keyboard Connector:
JKBMS1
The motherboard provides a standard PS/2 mouse / Keyboard
mini DIN connector for attaching a PS/2 mouse. You can plug a
PS/2 mouse / Keyboard directly into this connector. The connector
location and pin definition are shown below:
PS/2 Mouse / Keyboard Connectors

Pin

Assignment

1

Data

2

No connect

3

Ground4+5 V (fused)

5

Clock

6

No connect21

Mainboard Features

6-2. USB & LAN Port Connectors: JUSBLAN1
6-2-1. USB Connectors:

USB Connector (the below one)

Pin

Assignment

1+5 V (fused)2

USBP1-

3

USBP1+

4

GroundUSB Connector (the above one)

Pin

Assignment

5+5 V (fused)

6

USBP2-

7

USBP2+

8

Ground22

Mainboard Features

6-2-2. LAN Port Connector: (Optional)
This connector allows you to connect to the Internet through a
Local Area Network (LAN). You can set up the connection byentering account information provided by your ISP.

LAN Port Connector

Pin

Assignment

9

VCC3

10

TD+

11

TD-

12

RD+

13

RD-

14

NC

23

Mainboard Features

6-3. Serial and Parallel Interface Ports
This system comes equipped with two serial ports and one parallel
port. Both types of interface ports will be explained in thischapter.

6-3-1. The Serial Interface: JCOM1/ JCOM2
The serial interface port is sometimes referred to as an RS-232
port or an asynchronous communication port. Mice, printers,
modems and other peripheral devices can be connected to a serial
port. The serial port can also be used to connect your computerwith another computer system.
Connectivity
The serial ports can be used in many ways, and it may benecessary to become familiar with the pinout diagram. The
following chart gives you the function of each pin on the 9-pin
connector and some of the 25-pin connector. This information canbe used when configuring certain software programs to work withthe serial ports.
SignalName

DB9 PIN

DB25 PIN

DCD

Data Carrier Detect

1

8

RX

Receive Data

2

3

TX

Transmit Data

3

2

DTR

Data Terminal Ready

4

20

GND

Signal Ground

5

7

DSR

Data Set Ready

6

6

RTS

Request to Send

7

4

CTS

Clear to Send

8

5

RI

Ring Indicator

9

22

24

Mainboard Features

6-3-2. Parallel Interface Port: JPRNT1
Unlike the serial ports, parallel interface port has beenstandardized and should not present any difficulty interfacing
peripherals to your system. Sometimes called centronics port, theparallel port is almost exclusively used with printers. The parallel
port on your system has a 25-pin, DB25 connector. The pinout forthe parallel port are shown in the table below.

Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25

Signal-StrobeData 0
Data 1
Data 2
Data 3
Data 4
Data 5
Data 6
Data 7-Ack
Busy
Paper Empty+Select-Auto FDXT
-Error-Init-SLCTN
GroundGroundGroundGroundGroundGroundGroundGround25

Mainboard Features

6-4. Game (Joystick/MIDI) Port Connector:
JAUD_GAMEThis connector allows you to connect a joystick or game pad forplaying computer games. Also, you may play or edit professionalmusic by connecting MIDI devices.

Game/Joystick/MIDI

6-5. Audio Port Connectors:
JSPKR1/JLIN1/JMIC1

Speaker Out

Line InMic In1. Speaker Out is used to connect speakers or headphones foraudio output.
2. Line In can be connected to the external CD player, Tape
player or other audio devices for audio input.
3. Mic In is used to connect a microphone, which allows you to
input sounds and voices.

26

Mainboard Features

6-6. Audio Subsystem

JAUDIO1
2
1

10
9

JTAD1
1

JCDIN2

1

1
JCDIN127

Mainboard Features

6-6-1. CD-ROM Audio-In Header: JCDIN1
Pin No.

Assignment

1

Left Channel Input

2

Ground3

Ground4

Right Channel Input

6-6-2. CD-ROM Audio-In Header: JCDIN2
Pin No.

Assignment

1

Left Channel Input

2

Ground3

Right Channel Input

4

Ground

6-6-3. Front Panel Audio Header: JAUDIO1
Pin No.

Assignment

Pin No.

Assignment

1

Mic In2

Ground3

Mic Power

4

Audio Power5

RT Line Out

6

RT Line Out

7

Reserved

8

9

LFT Line Out

10

LFT Line Out

6-6-4. Telephony Audio Header: JTAD1
Pin No.

Assignment

1

PHONE

2

Ground3

Ground4

MONO_OUT28

10/01/2002