VIA Technologies NAB-7500 User manual

User’s Manual
NAB-7500
Version 1.01
December 17, 2007

ii
Copyright
Copyright © 2007 VIA Technologies Incorporated. All rights reserved.
No part of this document may be reproduced, transmitted, transcribed, stored in a retrieval system, or
translated into any language, in any form or by any means, electronic, mechanical, magnetic, optical,
chemical, manual or otherwise without the prior written permission of VIA Technologies, Incorporated.
Trademarks
All trademarks are the property of their respective holders. PS/2 is a registered trademark of IBM
Corporation.
Disclaimer
No license is granted, implied or otherwise, under any patent or patent rights of VIA Technologies. VIA
Technologies makes no warranties, implied or otherwise, in regard to this document and to the products
described in this document. The information provided in this document is believed to be accurate and
reliable as of the publication date of this document. However, VIA Technologies assumes no responsibility
for the use or misuse of the information in this document and for any patent infringements that may arise
from the use of this document. The information and product specifications within this document are subject
to change at any time, without notice and without obligation to notify any person of such change.
FCC-B Radio Frequency Interference Statement
This equipment has been tested and found to comply with the limits for a class B digital device, pursuant to
part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful
interference when the equipment is operated in a commercial environment. This equipment generates, uses
and can radiate radio frequency energy and, if not installed and used in accordance with the instruction
manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference, in which case the user will be required to correct the
interference at his personal expense.
Notice 1
The changes or modifications not expressly approved by the party responsible for compliance could void the
user's authority to operate the equipment.
Notice 2
Shielded interface cables and A.C. power cord, if any, must be used in order to comply with the emission
limits.
Tested To Comply
With FCC Standards
FOR HOME OR OFFICE USE

iii
S AFETY I NSTRUCTIONS
 Always read the safety instructions carefully.
 Keep this User's Manual for future reference.
 Keep this equipment away from humidity.
 Lay this equipment on a reliable flat surface before setting it up.
 The openings on the enclosure are for air convection hence protects the
equipment from overheating. Do not cover the openings.
 Make sure the voltage of the power source and adjust properly 110/220V
before connecting the equipment to the power inlet.
 Place the power cord in such a way that people cannot step on it. Do not
place anything over the power cord.
 Always unplug the power cord before inserting any add-on card or module.
 All cautions and warnings on the equipment should be noted.
 Never pour any liquid into the opening. Liquid can cause damage or
electrical shock.
 If any of the following situations arises, get the equipment checked by a
service personnel:
The power cord or plug is damaged.
Liquid has penetrated into the equipment.
The equipment has been exposed to moisture.
The equipment has not worked well or you cannot get it work
according to User's Manual.
The equipment has dropped and damaged.
If the equipment has obvious sign of breakage.
 Do not leave this equipment in an environment unconditioned or in a
storage temperature above 60oC (140oF). The equipment may be damaged.
Caution:
Explosion or serious damage may occur if the battery is incorrectly
replaced. Replace only with the same or equivalent battery type
recommended by the manufacturer.

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T ABLE OF C ONTENTS
Safety Instructions ........................................................................................................iii
Table of Contents..........................................................................................................iv
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Specifications..............................................................................................1
Mainboard Specifications.......................................................................................2
Mainboard Layout.....................................................................................................4
Back Panel Layout .....................................................................................................5
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Installation ...................................................................................................6
CPU.................................................................................................................................7
CPU Fan and System Fan: CPUFAN and SYSFAN .....................................7
Memory Module Installation ................................................................................8
Memory Slot: DDR2 DIMM...............................................................................8
DDR2 SDRAM Module Installation Procedures ........................................8
Available DDR2 SDRAM Configurations......................................................9
Connecting the Power Supply........................................................................... 10
ATX 20-Pin Power Connector ....................................................................... 10
Back Panel Ports ..................................................................................................... 11
12V DC Power Jack (manufacturing option) ........................................... 11
Serial port: COM................................................................................................ 11
USB Ports.............................................................................................................. 11
Gigabit LAN Ports ............................................................................................. 11
Connectors ............................................................................................................... 12
VGA Connector: VGA ....................................................................................... 12
Serial ATA II Connectors: SATA1 to SATA4.............................................. 12
IDE Connector: IDE ........................................................................................... 13
USB Pin Connector: USB_2/3 and USB_4/5.............................................. 14
LAN Activity Led Connector: LAN_LED...................................................... 14
Digital I/O Connector: DIO ............................................................................ 15
System Management Bus Connector: SMBUS ....................................... 15
Serial Port Connector: COM2........................................................................ 15
Case Connector: F_PANEL.............................................................................. 16
Power LED (PWR_LED)..................................................................................... 16
HDD LED (HD_LED)........................................................................................... 16
Power Switch (PW_BN).................................................................................... 16
Speaker (SPEAK) ................................................................................................ 16
Reset Switch (RST_SW).................................................................................... 16
Sleep LED (SLEEP_LED) .................................................................................... 16
KBMS Connector: KB/MS................................................................................ 17
INTRUDER ............................................................................................................ 17
12V DC Connector (manufacturing option) ............................................ 17
Jumpers...................................................................................................................... 18

v
Clear CMOS Connector: CLEAR_CMOS ..................................................... 18
Master/Slave Setting for CF Connector: MS_CF_SEL............................ 18
Voltage Selector for CF Connector: V_CF_SEL ........................................ 18
Voltage Selector for COM2 Connector: 5V-12V .................................... 19
BIOS Write Protect: WP-1............................................................................... 19
EEPROM Write Protect: WP-2....................................................................... 19
LAN Bypass: BYPASS ........................................................................................ 19
Slots............................................................................................................................. 20
Mini Peripheral Component Interconnect: MiniPCI.............................. 20
PCI Interrupt Request Routing ..................................................................... 20
Compact Flash Type II Connector: CF........................................................ 20
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3BIOS Setup................................................................................................ 21
Entering the BIOS Setup Menu ......................................................................... 22
Control Keys............................................................................................................. 23
Navigating the BIOS Menus............................................................................... 24
Getting Help............................................................................................................. 25
Main Menu ............................................................................................................... 26
Standard CMOS Features............................................................................... 26
Advanced BIOS Features ................................................................................ 26
Advanced Chipset Features........................................................................... 26
Integrated Peripherals..................................................................................... 26
Security Chip Configuration.......................................................................... 26
Power Management Setup............................................................................ 26
PnP/PCI Configurations .................................................................................. 27
PC Health Status................................................................................................ 27
Frequency/Voltage Control ........................................................................... 27
Load Fail-Safe Defaults ................................................................................... 27
Load Optimized Defaults................................................................................ 27
Set Supervisor Password ................................................................................ 27
Set User Password ............................................................................................ 27
Save & Exit Setup.............................................................................................. 27
Exit Without Saving .......................................................................................... 27
Standard CMOS Features.................................................................................... 28
Date........................................................................................................................ 28
Time ....................................................................................................................... 28
Halt On.................................................................................................................. 28
IDE Drives.................................................................................................................. 29
IDE Channel 0 Master ...................................................................................... 29
IDE Channel 0 Slave.......................................................................................... 29
Advanced BIOS Features ..................................................................................... 31
Virus Warning..................................................................................................... 31
Quick Power On Self-Test .............................................................................. 31
First Boot Device ............................................................................................... 32

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Second Boot Device ......................................................................................... 32
Third Boot Device.............................................................................................. 32
Boot Other Device ............................................................................................ 33
Boot Up NumLock Status............................................................................... 33
Typematic Rate Setting................................................................................... 33
Typematic Rate (Chars/Sec)........................................................................... 33
Typematic Delay (Msec).................................................................................. 33
Security Option.................................................................................................. 33
MPS Version Control for OS.......................................................................... 33
OS Select for DRAM > 64MB........................................................................ 34
Baud Rate............................................................................................................. 34
Agent after Boot................................................................................................ 34
Video BIOS Shadow ......................................................................................... 34
Full Screen Logo Show.................................................................................... 34
Summary Screen Show ................................................................................... 34
CPU Features............................................................................................................ 35
Delay Prior to Thermal .................................................................................... 35
Thermal Management..................................................................................... 35
Hard Disk Boot Priority ........................................................................................ 36
Network Boot Priority........................................................................................... 37
Advanced Chipset Features................................................................................ 38
Video RAM Cacheable..................................................................................... 38
VIA Wireless LAN Support ............................................................................. 38
Disabled LAN Bypass ....................................................................................... 38
AGP & P2P Bridge Control ................................................................................. 39
AGP Aperture Size ............................................................................................ 39
AGP3.0 Mode...................................................................................................... 39
VGA Share Memory Size................................................................................. 39
Direct Frame Buffer .......................................................................................... 39
CPU & PCI Bus Control ........................................................................................ 40
VLink Mode Selection...................................................................................... 40
VLink 8X Support............................................................................................... 40
VIA PWR Management ................................................................................... 40
Integrated Peripherals.......................................................................................... 41
Onboard IDE Channel 0.................................................................................. 41
IDE HDD Block Mode....................................................................................... 41
SATA Controller ................................................................................................. 41
SATA Controller Mode .................................................................................... 41
OnBoard LAN Boot ROM ............................................................................... 42
Watch Dog Timer Select................................................................................. 42
SuperIO Device ....................................................................................................... 43
Onboard Serial Port 1...................................................................................... 43
Onboard Serial Port 2...................................................................................... 43

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VIA OnChip IDE Device ........................................................................................ 44
IDE Prefetch Mode............................................................................................ 44
CF Card UDMA66 .............................................................................................. 44
IDE DMA Transfer Access............................................................................... 44
USB Device Setting................................................................................................ 45
USB 1.0 Controller............................................................................................. 45
USB 2.0 Controller............................................................................................. 45
USB Operation Mode ...................................................................................... 45
USB Keyboard Function .................................................................................. 45
USB Mouse Function........................................................................................ 46
USB Storage Function...................................................................................... 46
Security Chip Configuration ............................................................................... 47
Security Chip....................................................................................................... 47
Power Management Setup................................................................................. 48
ACPI Suspend Type .......................................................................................... 48
HDD Power Down............................................................................................. 48
Power Management Timer ............................................................................ 48
Video Off Option............................................................................................... 49
Video Off Method............................................................................................. 49
Soft-Off by PWRBTN........................................................................................ 49
Run VGABIOS if S3 Resume........................................................................... 49
AC Loss Auto Restart ....................................................................................... 49
Peripherals Activities............................................................................................. 50
USB Resume........................................................................................................ 50
PowerOn by PCI Card ...................................................................................... 50
RTC Alarm Resume........................................................................................... 50
PnP/PCI Configurations ....................................................................................... 51
Init Display First ................................................................................................. 51
PNP OS Installed................................................................................................ 51
Reset Configuration Data............................................................................... 51
Resources Controlled By................................................................................. 52
Assign IRQ for VGA .......................................................................................... 52
Assign IRQ for USB ........................................................................................... 52
Maximum Payload Size................................................................................... 52
PC Health Status..................................................................................................... 53
Frequency/Voltage Control ................................................................................ 54
DRAM Clock ........................................................................................................ 54
DRAM Timing ..................................................................................................... 54
Auto Detect PCI Clk.......................................................................................... 54
Spread Spectrum............................................................................................... 54
Load Fail-Safe Defaults ........................................................................................ 55
Load Optimized Defaults..................................................................................... 56
Set Supervisor/User Password........................................................................... 57

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Set Supervisor..................................................................................................... 57
User Password.................................................................................................... 57
Save & Exit Setup................................................................................................... 59
Exit Without Saving ............................................................................................... 60
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4Driver Installation ................................................................................... 61
Driver Utilities.......................................................................................................... 62
Getting Started................................................................................................... 62
Running the Driver Utilities CD.................................................................... 63
CD Content............................................................................................................... 64

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1
S PECIFICATIONS
The compact and highly integrated VIA NAB-7500 mainboard comes
with an integrated VIA C7
®
NanoBGA2 processor, boasting of ultra-low
power consumption and cool operation.

2
Mainboard Specifications
CPU
•VIA C7
®
1.5GHz NanoBGA2 processor
(2.0GHz and 1.0GHz options are also available)
Chipset
•VIA CN896 North Bridge
•VIA VT8251 South Bridge
Graphics
•Integrated VIA Chrome9™ HC Integrated Graphics with 2D/3D
and Video Acceleration
Memory
•Two DDR2 667/533 DIMM slots (up to 3.5 GB)
Expansion Slot
•One 32-bit Mini-PCI Type III socket
(available for NAB-7500-15TLG)
•One 33MHz 32-bit PCI Golden Finger
IDE
•One UltraDMA 133/100/66 connector (44 pin)
LAN
•Four VIA VT6130 PCI Express Gigabit Ethernet Controller
•One VIA VT6122 Gigabit Ethernet Controller
(available for NAB-7500-15TLG)
Note:
System resources (such as BIOS, PCI, etc.) require physical memory
address locations that reduce available memory addresses above 3 GB.
This may result in less than 4 GB of memory being available to the
operating system and applications.

3
Back Panel I/O Ports
•One DB-9 serial port
•Five (NAB-7500-15TLG) or four (NAB-7500-15LG) RJ-45 LAN
ports
•Two USB 2.0 ports
Onboard I/O Connectors
•One VGA pin connector
•One Digital I/O pin connector
•One PS/2 keyboard/mouse pin connector
•One Front Panel pin connector
•One Front Panel LAN LED pin connector for monitoring LAN
activity
•Two fan connectors for CPU and System fans
•Four S-ATA II connectors
•One Type II Compact Flash slot
•Two USB pin connectors for four additional USB 2.0 ports
•One serial port pin connector (5V/12V selectable)
•One HDD power pin connector (+5V, +12V)
•One ATX power connector
•One 12V DC jack (optional)
•One 1x4 pin 12V DC connector (optional)
Onboard TPM (Trust Platform Module)
•Infineon SLB9635TT 1.2 (available for NAB-7500-15TLG)
Super IO
•Winbond W83697HG
BIOS
•Award BIOS with LPC 4/8Mbit flash memory capacity
Form Factor
•228.6mm X 180mm (six layer)

4
Mainboard Layout

5
Back Panel Layout

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2
I NSTALLATION
This chapter provides you with information about hardware installation
procedures. It is recommended to use a grounded wrist strap before
handling computer components. Electrostatic discharge (ESD) can
damage some components.

7
CPU
The VIA NAB-7500 mainboard is packaged with a standard VIA C7
®
1.5GHz NanoBGA2 processor. Other processor speeds (i.e., 2.0GHz and
1.0GHz) are also available as manufacturing options. The VIA C7
®
1.5GHz processor requires a heatsink with fan to provide sufficient
cooling.
CPU Fan and System Fan: CPUFAN and SYSFAN
The CPU_FAN (CPU fan) and SYS_FAN (system fan) run on +12V and
maintain system cooling. When connecting the wire to the connectors,
always be aware that the red wire (positive wire) should be connected to
the +12V. The black wire is Ground and should always be connected to
GND.
Pin Signal
1 FANIO
2 +12V
3 GND
CPU
_
FAN SYS_FAN

8
Memory Module Installation
Memory Slot: DDR2 DIMM
The VIA NAB-7500 mainboard provides two 240-DIMM slots for DDR2
667/533 SDRAM memory modules and supports memory sizes up to
3.5GB.
DDR2 SDRAM Module Installation Procedures
•Locate the DIMM slot in the motherboard.
•Unlock a DIMM slot by pressing the retaining clips outward.
•Align a DIMM on the socket such that the notch on the DIMM
matches the break on the slot.
•Firmly insert the DIMM into the slot until the retaining clips
snap back in place and the DIMM is properly seated.

9
Available DDR2 SDRAM Configurations
Refer to the table below for available DDR2 SDRAM configurations on
the mainboard.
Slot Module Size Total
DIMM1 64MB, 128MB, 256MB, 512MB, 1GB, 2GB 64MB-2GB
DIMM2 64MB, 128MB, 256MB, 512MB, 1GB, 2GB 64MB-2GB
Maximum supported system memory 64MB-4GB

10
Connecting the Power Supply
The VIA NAB-7500 mainboard supports a conventional ATX power
supply for the power system. Before inserting the power supply
connector, always make sure that all components are installed correctly
to ensure that no damage will be caused.
ATX 20-Pin Power Connector
To connect the power supply, make sure the power plug is inserted in
the proper orientation and the pins are aligned. Then push down the
plug firmly into the connector.
Pin Signal Pin Signal
1 +3.3V 11 +3.3V
2 +3.3V 12 -12V
3 GND 13 GND
4 +5V 14 Power Supply On
5 GND 15 GND
6 +5V 16 GND
7 GND 17 GND
8 Power Good 18 -5V
9 +5V Standby 19 +5V
10 +12V 20 +5V

11
Back Panel Ports
The back panel has the following ports:
12V DC Power Jack (manufacturing option)
The DC power jack is used to connect an external AC adapter as the
power source instead of using an ATX power supply.
Serial port: COM
The 9-pin COM port is for pointing devices or other serial devices.
USB Ports
Two standard USB 2.0 ports are provided on the back panel.
Gigabit LAN Ports
The mainboard provides four PCIe Gigabit Ethernet ports controlled with
separate VIA VT6130 PCIe Gigabit Ethernet controllers and one Gigabit
Ethernet port (available on NAB-7500-15TLG) controlled by a VIA
VT6122 Gigabit Ethernet controller.

12
Connectors
VGA Connector: VGA
This is an interface for connecting the included VGA pin connector cable.
Pin Signal Pin Signal
1 GND 2 +5V
3 R 4 VGA_SPD2
5 G 6 VGA_SPCLK2
7 B 8 VGA_HS
9 GND 10 VGA_VS
11 GND 12 GND
13 GND 14 KEY
Serial ATA II Connectors: SATA1 to SATA4
These next generation connectors support the right angle Serial ATA
cables for primary internal storage devices. The current Serial ATA
interface allows up to 300MB/s data transfer rate, faster than the
standard parallel ATA with 133 MB/s (Ultra DMA).