Advantech SOM-4475 User manual

SOM-4475 ETX Module
Intel® Pentium® III/Celeron®
SOM-ETX CPU Module with
CPU, VGA/LCD/LVDS/LAN/
Audio Interface
User's Manual

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Copyright notice
This document is copyrighted, 2002, by Advantech Co., Ltd. All rights
are reserved. The original manufacturer reserves the right to make
improvements to the products described in this manual at any time
without notice.
No part of this manual may be reproduced, copied, translated or trans-
mitted in any form or by any means without the prior written permis-
sion of the original manufacturer. Information provided in this manual
is intended to be accurate and reliable. However, the original manufac-
turer assumes no responsibility for its use, nor for any infringements
upon the rights of third parties which may result from its use.
Acknowledgements
SOM and DTOS are trademarks of Advantech Co., Ltd.
AMD is a trademark of Advanced Micro Devices, Inc.
Award is a trademark of Award Software International, Inc.
Cyrix is a trademark of Cyrix Corporation.
IBM, PC/AT, PS/2 and VGA are trademarks of International Business
Machines Corporation.
Intel and Pentium are trademarks of Intel Corporation.
Microsoft Windows® is a registered trademark of Microsoft Corp.
RTL is a trademark of Realtek Semiconductor Co., Ltd.
C&T is a trademark of Chips and Technologies, Inc.
UMC is a trademark of United Microelectronics Corporation.
Winbond is a trademark of Winbond Electronics Corp.
STPC is a trademark of SGS Thomson Corp.
For more information on this and other Advantech products, please
visit our website at: http://www.advantech.com
For technical support and service, please visit our support website at:
http://support.advantech.com
This manual is for the SOM-4475
Part No. 2000000038
1st Edition Printed in Taiwan Oct 2003

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Packing list
Before you begin installing your card, please make sure that the fol-
lowing materials have been shipped:
• 1 SOM-4475 System On Module CPU module
• CD-ROM or Disks for utility, drivers, and manual (in PDF for
mat.
• Heatsink
If any of these items are missing or damaged, contact your distributor
or sales representative immediately.
Additional Information and Assistance
1. Visit the Advantech web site at WWW.advantech.com where you
can nd the latest information about the product.
2. Contact your distributor, sales representative, or Advantech's
customer service center for technical support if you need additional
assistance.
Please have the following information ready before you call:
. Product name and serial number
. Description of your peripheral attachments
. Description of your software (operating system, version, application
software, etc.)
. A complete description of the problem
. The exact wording of any error messages

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Version History
October, 2003 (manual no. 2000000038)
SOM-4475 User’s Manual, Ed.1

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Contents
Chapter 1 General Information...................................... 2
1.1 Introduction ........................................................................2
1.2 Specications.......................................................................3
1.2.1 Standard System On Module functions.......................3
1.2.2 VGA/at panel Interface .............................................4
1.2.3 Audio function ............................................................4
1.2.4 TV-out function ..........................................................4
1.2.5 PCI bus Ethernet interface..........................................5
1.2.6 Mechanical and environmental ..................................5
1.3 Board dimensions ...............................................................6
Chapter 2 Connector Assignments ............................ 10
2.1 Connector Locations ........................................................10
2.2 Pin Assignments for X1, X2, X3, X4 connectors............ 11
2.3 Safety precautions ............................................................ 11
Chapter 3 Software Conguration .............................. 14
3.1 Introduction ......................................................................14
3.2 Utility CD disk ..................................................................14
3.3 VGA display software conguration...............................14
Table 3-1: Connections for Toshiba LTM10C042 ...........................................
3.4 Connections for two standard LCDs ..............................16
3.4.1 Connections for Toshiba LTM10C042(640 x 480 TFT
color LCD) .........................................................................16
Table 3-1: Connections for Toshiba LTM10C042 .......................................16
3.4.2 Connections for Toshiba LTM12C275A (800 x 600
TFT color LCD) .................................................................17
Table 3-2: Connections for Toshiba LTM12C275A.....................................17
Appendix A Watchdog Timer....................................... 20
A.1 Programming the watchdog timer .................................. 20

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Appendix B System Assignments .............................. 24
B.1 System I/O ports ...............................................................24
Table B-1: System I/O ports .......................................................................24
B.2 DMA channel assignments...............................................25
Table B-2: DMA channel assignments .......................................................25
B.3 Interrupt assignments ......................................................26
Table B-3: Interrupt assignments ...............................................................26
B.4 1st MB memory map........................................................27
Table B-4: 1st MB memory map.................................................................27

CHAPTER
1
General Information
This chapter gives background infor-
mation on the SOM-4475 CPU System
On Module.
Sections include:
• Introduction
• Specications
• Board Dimensions

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Chapter 1 General Information 3
Chapter 1 General Information
1.1 Introduction
The SOM-4475 is an Intel Low Voltage Intel® Pentium® III/
Celeron® processor System On Module (SOM) with audio controller,
a 4X AGP SVGA controller, a PCI 10/100Base-T Ethernet interface.
Using an Intel PIII/Celeron processor, the SOM-4475 achieves quite
good performance on the SOM-ETX CPU module. On-board features
include two serial ports, one multi-mode parallel (ECP/EPP/SPP) port,
four USB (Universal Serial Bus) ports, a oppy drive controller, and
a keyboard/PS/2 mouse interface. The built-in high-speed PCI IDE
controller supports both PIO and UDMA/33 bus master modes. Up to
two IDE devices can be connected, including large hard disks, CD-
ROM drives, and tape backup drives. The SOM-4475 features power
management to minimize power consumption. It complies with the
"Green Function" standard and supports Doze, Standby and Suspend
modes. In addition, the board's watchdog timer can automatically reset
the system or generate an interrupt if the system stops due to a pro-
gram bug or EMI.The small size (95 mm x 114 mm) and use of four
high capacity connectors based on the proven SOM-ETX form factor,
allow the SOM-ETX modules to be easily and securely mounted onto
a customized solution board or our standard SOM-DB4400 devel-
opment board.
The SOM-4475 is a highly integrated multimedia SOM that combines
audio, video, and network functions. It provides 16-bit half-duplex,
8-bit full-duplex, integrated 3D audio, and up to 1024 x 768 resolution
@ 16.8 M colors with 8/16/32 MB system memory. Major on-board
devices adopt PCI technology, to achieve outstanding computing per-
formance when used with Intel® Pentium® III/Celeron® processors.
The SOM-4475 also supports TV-out that supports NTSC/PAL format
for multimedia applications.

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Chapter 1 General Information 3
1.2 Specications
1.2.1 Standard System On Module functions
• CPU:
Intel® Pentium® III 933 MHz (SOM-4475FR0A1& SOM-4475FL-
R0A1)
Intel® Celeron® 650 MHz processor (SOM-4475F-M0A1& SOM-
4475FL-M0A1)
Intel® Celeron® 400 MHz processor (SOM-4475F-J0A1&SOM-
4475FL-J0A1)
• BIOS: Award 256KB Flash memory
• Chipset: VIA PN133 chipset, VT8606T(TwisterT) & VT82C686B
• Cache memory: Intel ®Pentium®III 512KB L2 cache memory;
Celeron® 256KB L2 cache memory on the processor
• System memory: One 144-pin SO-DIMM socket accepts 64 ~ 512
MB SDRAM
• Power management: Supports power saving modes including
Normal/Standby/Suspend modes. APM1.2/ACPI 1.0 compliant
• Enhanced IDE interface: 2 EIDE channels support up
to 4 IDE devices. BIOS auto-detect, PIO Mode3 or Mode4,
UDMA/33 transfer
• FDD interface/Parallel port: Both of two interface can’t co-exist,
Parallel port is default use for designer, FDD interface hardware
design is required to be modied, for detailed information, please
refer to our website .http://service.advantech.com.tw/
• Infrared: One 115 Kbps infrared port, IrDA compliant
• Serial port: two serial ports, COM 1: RS-232 and COM 2 : RS-232
(TTL Output)
• Watchdog timer: 62 level timer intervals.
Generates system reset and jumperless selection and
software enabled/disabled

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Chapter 1 General Information 5
• Keyboard/mouse connector: Supports standard PC/AT keyboard
and PS/2 mouse interface
• USB interface: Four USB connectors compliant with
USB Spec. Rev. 1.1
1.2.2 VGA/at panel Interface
• Chipset: VIA Twister chip with integrated Savage4 2D/3D/Video
Accelerator
• Frame buffer: Supports 8/16/32 MB frame buffer with system
memory
• Display type: Simultaneously supports CRT and at panel
displays. Also supports up to 18-bit TFT LCD panels (SOM-4475F-
J0A1, SOM-4475F-M0A1 &SOM-4475F-R0A1) and 2 Channel
LVDS interface (SOM-4475FL-R0A1, SOM-4475FL-M0A1 &
SOM-4475FL-J0A1 )
• Display mode: CRT Mode: 1280 x 1024 @ 32bpp (60Hz), 1024
x 768 @ 32bpp(85Hz); LCD/Simultaneous Modes: 1280 x 1024
@16bpp(60Hz), 1024 x 768 @16bpp(60Hz)
1.2.3 Audio function
• Chipset: VIA 82C686 South Bridge
• Audio controller: AC97 Ver. 2.0 compliant interface,
Multistream Direct Sound and Direct Sound 3D acceleration
• Stereo sound: 8-bit full-duplex
• Audio interface: Microphone in, Line in, Line out
1.2.4 TV-out function
• Chipset: VIA VT1621
• Supports NTSC, NTSC=EIA (Japan) and PAL TV formats
• Provides Composite video and S-video outputs via RCA
(composite) connector and S-video connetor

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Chapter 1 General Information 5
• Supports 640 x 480 and 800 x 600 input resolutions
• Supports Windows © 95/98/NT and Windows XP drivers
1.2.5 PCI bus Ethernet interface
• Chipset: REALTEK RTL8139 Ethernet controller
• Ethernet interface: IEEE 802.3U compatible 100/10Base-T
interface. Includes software drivers and boot ROM
1.2.6 Mechanical and environmental
• Dimensions (L x W): SOM-ETX form factor, 95 mm x 114 mm
(3.7" x 4.5")
• Power supply voltage: +5 V ± 5%
• Power requirements:
Max:4.6 V@5 V
Typical 3.6 A@5 V (PIII 933 MHz + 256 MB DRAM)
Typical 3.6 A@5 V (Celeron 650 MHz + 256 MB DRAM)
Typical 3.3 A@5 V (Celeron 400 MHz + 256 MB DRAM)
• Operating temperature: 0 ~ 60° C (32 ~ 140° F)
• Operating humidity: 0% ~ 90% Relative Humidity, Noncondensing
• Weight: 0.074 Kg (weight of total package)

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Chapter 1 General Information 7
1.3 Board dimensions
Figure 1-1: SOM-4475 dimensions

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Chapter 1 General Information 7
Figure 1-2: SOM-4475 Top view

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CHAPTER
2
Connector Assignments
and Descriptions
This chapter tells how to set up the SOM-
4475 hardware. It includes instructions
on connecting peripherals, switches and
indicators. Make sure you read all the
safety precautions before you begin the
installation procedure.

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Chapter 2 Connectors and Pin Assignments 11
Chapter 2 Connector Assignments
2.1 Connector Locations
The board has a number of connectors that allow you to congure
your system to suit your application.
SOM-4475 Locating Connectors

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Chapter 2 Connectors and Pin Assignments 11
2.2 Pin Assignments for X1/2/3/4 connectors
Please refer to SOM-ETX Design and Specication Guide, Chap-
ter 2
2.3 Safety precautions
Warning! Always completely disconnect the power cord from
your board whenever you are working on it. Do not
make connections while the power is on, because
sensitive electronic components can be damaged by
a sudden rush of power.
Caution! Always ground yourself to remove any static charge
before touching the board. Modern electronic de-
vices are very sensitive to static electric charges.
Use a grounding wrist strap at all times. Place all
electronic components on a static-dissipative sur-
face or in a static-shielded bag when they are not in

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Software Conguration
(optional for SOM-4475)
This chapter details the software congu-
ration information. It shows you how to
congure the SOM-4475 card to match
your application requirements.
Sections include:
• LCD display conguration
• Connections for two standard LCDs
CHAPTER
3

14 SOM-4475 User's Manual
Chapter 3 Software Conguration 15
AWDFLASH.EXE
4475Vxxx.BIN
Chapter 3 Software Conguration
3.1 Introduction
The SOM-4475 system BIOS and custom drivers are located in a 256
KB, 32-pin Flash ROM. A single Flash chip holds the system BIOS
and VGA BIOS. The display type can be congured via software.
This method minimizes the number of chips and eases conguration.
You can change the display BIOS simply by reprogramming the Flash
chip.
3.2 Utility CD disk
The SOM-4475 is supplied with a software utility on CD-ROM. This
disk contains the necessary le for setting up the VGA display. Direc-
tories and les on the disk are as follows:
AWDFLASH.EXE
This program allows you to update the BIOS Flash ROM.
4475110.BIN
This binary le contains the system BIOS.
3.3 VGA display software conguration
The SOM-4475 on-board VGA/LCD interface supports an 18-bit
TFT LCD, at panel displays and traditional analog CRT monitors.
The interface can drive CRT displays with resolutions up to 1280 x
1024@32 bpp. It is also capable of driving color panel displays with
resolutions of 1280 x 1024 @ 16bpp. The LCD type is congured
completely via the software utility, so you do not have to set any