Advantech SOM 144 Guida
SOM 144
System-on-Module
Design Specification Rev. 1.0
Copyright Notice
This document is copyrighted 2001 by Advantech Co. Ltd. All rights
are reserved. Advantech Co., Ltd. reserves the right to make improve-
ments to the products described in this manual at any time without
notice.
No part of this manual may be reproduced, copied, translated or
transmitted in any form or by any means without the prior written
permission of Advantech. Information provided in this manual is
intended to be accurate and reliable. However, Advantech assumes no
responsibility for its use, nor for any infringements upon the rights of
third parties which may result from its use.
All brand and product names mentioned herein are trademarks or
registered trademarks of their respective holders.
Acknowledgments
SOM 144 is a trademark of Advantech Co., Ltd. IBM, PC/AT, and PS/
2 are trademarks of International Business Machines Corporation. MS-
DOS and Windows CE are trademarks of Microsoft Corporation. All
other brand and product names mentioned herein are trademarks or
registered trademarks of their respective holders.
Part No. 2006014410 1st Edition
Printed in Taiwan June 2001
History
The SOM 144 specification and design guide has gone through
revisions since its inception. To keep user’s current with the latest
version of the Advantech SOM 144 specifications and designs, this
page lists the most recently printed revision of the SOM 144 specifica-
tion and design guide. This revision history corresponds with the
revision on the SOM 144 specifications and designs. The guide prints
are ordered from oldest to newest.
Specification and Design Guide
Document No. Date Rev. Changes Items
2006014410 31 May 2001 1.0 Initiation of SOM 144/
PCI Design Specifica
tion
Contents
Chapter 1 General Information 1
1.1 Overviewview ................................................................... 2
Chapter 2 Connector Assignments and Descriptions 3
2.1 144-pin SODIMM (PCI/IDE/ Serial port /USB/AC97/ .
KB/Mouse) ....................................................................... 4
2.2 Recommended 80-pin Front-end Connector (VGA/.....
Ethernet/IrDA/Printer/FDD/ATX) ................................. 6
Chapter 3 Signal Description 7
3.1 144 pin SODIMM (PCI/IDE/ Serial port /USB/AC97/ ..
KB/Mouse) ....................................................................... 8
3.1.1 PCI ............................................................................. 8
3.1.2 IDE .............................................................................9
3.1.3 Serial Ports ............................................................... 11
3.1.4 USB .......................................................................... 11
3.1.5 AC97 ........................................................................ 12
3.1.6 PS/2 Keyboard/Mouse ............................................. 12
3.1.7 Miscellaneous ........................................................... 13
3.2 Recommended front-end 80pin board to board con ......
nector (VGA/Ethernet/IrDA/Printer/FDD/ATX) ....... 13
3.2.1 VGA ......................................................................... 13
3.2.2 Ethernet ................................................................... 14
3.2.3 IrDA ......................................................................... 15
3.2.4 LPT/FDD ................................................................. 15
3.2.5 Miscellaneous ........................................................... 17
Chapter 4 Mechanical Characteristics 19
4.1 Mechanical Characteristics .......................................... 20
4.1.1 Dimensions of SOM 144 Module ............................. 20
4.1.2 SOM 144 Solution Board Layout ............................ 21
4.1.4 SODIMM Layout ..................................................... 22
4.1.3 Recommand Component Suppliers .......................... 22
4.1.5 SOM 144 Module Installation ................................... 23
4.1.6 SOM 144 Module Removal ...................................... 24
Chapter 5 Electrical Characteristics 27
5.1 PCI Bus ........................................................................... 28
5.1.1 IDSEL mapping ........................................................ 28
5.1.2 Interrupt-Routing ...................................................... 28
5.1.3 Onboard resources ................................................... 28
5.2 Power supply definition ................................................. 29
5.3 Electrical Specifications ................................................ 29
5.4 Serial ports ..................................................................... 29
5.5 IrDA ................................................................................. 30
5.6 Parallel Port..................................................................... 30
5.7 FDD .................................................................................. 30
5.8 IDE ................................................................................... 30
5.9 Ethernet specification.................................................... 30
Appendix A Electrical Characteristics 31
A.1 Standard PS/2 - Connectors .......................................... 34
A.2 RS232C ............................................................................ 34
A.3 ATA .................................................................................. 34
A.4 USB .................................................................................. 34
A.5 PCI .................................................................................... 35
A.6 ATX .................................................................................. 35
A.7 AC-LINK 97 (AC97) ..................................................... 35
CHAPTER
1
General Information
This chapter explains the concept of the
SOM 144 (System-on-Module) module. It
also gives the reasons why SOM 144 can
give the most value and benefits to
embedded system applications.
2SOM 144 Design Specification Rev.1.0
1.1Overview
SOM 144 is a new form factor to speed up developing embedded systems.
Simply put, it takes one SODIMM plus a front-end
connector on a 2.5-inch-Hard-Drive-size PC board. Through the
interface of the SODIMM transfer most of the common signals, such as
PCI and USB interfaces for most of peripheral devices and IDE interface
for Hard-Drive, CD-ROM, or Compact Flash. At the same time, special
signals or other function requests go through the
front-end connector.
Based on this specification, it is easier to develop a customer’s
solution board with an off the shelf SOM 144 module and reduce the time
to market of your product. With the SODIMM socket and within 5 sec, a
SOM 144 module is easy to install into or unload from
customer’s solution board.
This standard is a reference for board dimension and pinout of SOM 144
module. Different SOM 144 module may provide a different set of fea-
tures. Please refer the datasheet or manual of your SOM 144
module for details or consult your supplier for supported features. SOM
144 modules are only interchangeable as long as they provide the same
features. At this point, without changing customers’
solution board, customers can upgrade the system module with
higher performance CPU immediately. Some non-standard features like
LCD display interface are not usable without external parts. To create a
backplane or customer’s solution board for SOM 144 module, it’s highly
recommended having experience with PCI device
development. Furthermore, experience with signal integrity and
timing for the layout of your solution board is recommended.
Please contact you supplier or Advantech for advice.
In addition to this document, the user should refer to the following indus-
try standard specifications:
PCI Bus specification Rev 2.2
USB specification 1.1
ATX specification
AC97 Specification Revision 1.3, 2.0, and 2.1
HIROSE Catalog FX8 SERIES
Chapter 2 Pinout of SOM 144/PCI Interfaces 3
CHAPTER
2
Connector Assignments
and Descriptions
This chapter provides the pinout tables
for the SOM 144 PCI interface, including
the 144-pin SODIMM and recommended
80-pin frontend connector.
4SOM 144 Design Specification Rev.1.0
2.1 144-pin SODIMM (PCI/IDE/ Serial port
/USB/AC97/KB/Mouse)
Table 2-1: Pinout of 144-pin SODIMM
Pin Signal Pin Signal
1 GND 2 GND
3 VCC 4 VCC
5 IRQY 6 IRQX
7 IRQW 8 IRQZ
9 GND 10 PCIRST#
11 PCICLK1 12 GND
13 PCICLK2 14 PCICLK3
15 GND 16 GND
17 REQ#0 18 GNT#0
19 REQ#1 20 GNT#1
21 REQ#2 22 GNT#2
23 AD31 24 AD30
25 AD29 26 AD28
27 AD27 28 AD26
29 AD25 30 AD24
31 CBE#3 32 AD22
33 AD23 34 AD20
35 AD21 36 AD18
37 AD19 38 AD16
39 AD17 40 FRAME#
41 CBE#2 42 TRDY#
43 IRDY# 44 STOP#
45 DEVSEL# 46 PAR
47 LOCK# 48 AD15
49 GPERR# 50 AD14
51 SERR# 52 AD13
53 CBE#1 54 AD12
55 AD11 56 CBE#0
57 AD10 58 AD9
59 GND 60 GND
61 GND 62 GND
63 AD8 64 AD7
65 AD6 66 AD5
67 AD4 68 AD2
69 AD0 70 AD3
71 RESERVED 72 A D1
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