Motorola T56DB2 Users manual

Developer's Guide

Motorola g20
Cellular Engine
Module Description

98-08901C66-G

Notice

While reasonable efforts have been made to assure the accuracy of this document, Motorola, Inc. assumes no liability resulting
from any inaccuracies or omissions in this document, or from use of the information obtained herein. The information in this
document has been carefully checked and is believed to be entirely reliable. However, no responsibility is assumed for
inaccuracies or omissions. Motorola, Inc. reserves the right to make changes to any products described herein and reserves the
right to revise this document and to make changes from time to time in content hereof with no obligation to notify any person of
revisions or changes. Motorola, Inc. does not assume any liability arising out of the application or use of any product, software, or
circuit described herein; neither does it convey license under its patent rights or the rights of others.

It is possible that this publication may contain references to, or information about Motorola products (machines and programs),
programming, or services that are not announced in your country. Such references or information must not be construed to mean
that Motorola intends to announce such Motorola products, programming, or services in your country.

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This instruction manual, and the Motorola products described in this instruction manual may be, include or describe copyrighted
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Accordingly, any copyrighted Motorola or other 3rd Party supplied SW computer programs contained in the Motorola products
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of law in the sale of a product.

VENDOR COPYRIGHT

Apache Software Foundation Copyright 2002-2003 All Rights Reserved
Artesyn Copyright 2002-2003 All Rights Reserved
CMU * Copyright 2002-2003 All Rights Reserved
Freeware Tools / Utilities * Copyright 2002-2003 All Rights Reserved
Performance Technologies Copyright 2002-2003 All Rights Reserved
Telelogic Copyright 2002-2003 All Rights Reserved
QNX * Copyright 2002-2003 All Rights Reserved

*= Freeware

Usage and Disclosure Restrictions

License Agreements

The software described in this document is the property of Motorola, Inc. and its licensors. It is furnished by express license
agreement only and may be used only in accordance with the terms of such an agreement.

Copyrighted Materials

Software and documentation are copyrighted materials. Making unauthorized copies is prohibited by law. No part of the software
or documentation may be reproduced, transmitted, transcribed, stored in a retrieval system, or translated into any language or
computer language, in any form or by any means, without prior written permission of Motorola, Inc.

High Risk Materials

Components, units, or third-party products used in the product described herein are NOT fault-tolerant and are NOT designed,
manufactured, or intended for use as on-line control equipment in the following hazardous environments requiring fail-safe
controls: the operation of Nuclear Facilities, Aircraft Navigation or Aircraft Communication Systems, Air Traffic Control, Life
Support, or Weapons Systems (High Risk Activities"). Motorola and its supplier(s) specifically disclaim any expressed or implied
warranty of fitness for such High Risk Activities.

Trademarks

MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office. All other product or service names are
the property of their respective owners.

©Copyright 2005 Motorola, Inc.
Java™ Technology and/or J2ME™: Java and all other Java-based marks are trademarks or registered trademarks of Sun

Microsystems, Inc. in the U.S. and other countries.
UNIX®: UNIX is a registered trademark of The Open Group in the United States and other countries.

REV052604

g20 Cellular Engine
Module Description

© Motorola Israel LTD., 2005
A subsidiary of Motorola Inc.
All rights reserved.

Developer’s Guide

98-08901C66-G

REVISION HISTORY

Revision Date Purpose

O 30 June 2003 Initial release

A 05 November 2003 Minor corrections to the manual

B 15 February 2004 Updated book version

Updated section 2.3, Product Specifications

Updated section 2.5, Regulatory Approvals

Updated section 3.2.3.1, On/Off Signal

Updated Waking up the DTE diagram in section 3.2.4.2, DCE/DTE Connectivity

Updated section 3.3.3.1, SIM Connection

Added section 3.3.5.3, Antenna Detect

Updated section 3.4.1.1, Analog Input

Removed 2 g20 models

C 1 March 2004 Updated Table 13 - g20 Interface Connector Pin Assignments

D July 2004 Updated section 3.2.1, Power Supply Design

Updated section 3.2.1.1, Power Supply RF Filtering

Updated section 3.2.3.1, On/Off Signal

Updated section 3.2.3.2, Ignition Signal

Updated section 3.2.4.1, General

Updated section 3.3.1, RS232

Updated section 3.3.1.1, RS232 Levels

Updated section 3.3.1.2, RS232 Connection

Updated section 3.3.2, USB

Updated section 3.3.2.1, USB Connection

Updated section 3.3.3.1, SIM Connection

Updated section 3.3.5.3, Antenna Detect

Updated section 3.4.1.1, Analog Input

Updated section 3.4.2, Digital Audio Interface

Updated section 3.5, Antenna

v 98-08901C66-G

Revision Date Purpose

Updated table in section 4.2 and added notes, Pin Assignments

Update section 6.1, Customer Assistance

E October 2004 Updated section 3.3.3.1, SIM Connection, and changed Figure 13

Updated section 3.4.2, Digital Audio

F March 2005 Updated section 3.2.3, Turning the Unit On/Off

Updated section 2.8.2, Antenna Installation

G April 2005 New sections: “LIMITATION OF LIABILITY” on page 2 and “WARRANTY

NOTIFICATION” on page 3

98-08901C66-G vi

g20 Cellular Engine
Module Description

CONTENTS

REVISION HISTORY ................................................................................................................................................................v

PREFACE

1.1 SCOPE OF THIS MANUAL .................................................................................................................................................1

1.2 WHO SHOULD USE THIS MANUAL.................................................................................................................................1

1.3 APPLICABLE DOCUMENTS ..............................................................................................................................................1

1.3.1 Reference Documents .................................................................................................................................................1

1.3.2 Standards.....................................................................................................................................................................1

1.4 TRADEMARKS.....................................................................................................................................................................2

1.5 HOW THIS MANUAL IS ORGANIZED..............................................................................................................................2

1.6 LIMITATION OF LIABILITY..............................................................................................................................................2

1.7 WARRANTY NOTIFICATION ............................................................................................................................................3

1.7.1 HOW TO GET WARRANTY SERVICE?.................................................................................................................3

1.7.2 CLAIMING.................................................................................................................................................................3

1.7.3 CONDITIONS ............................................................................................................................................................4

1.7.4 WHAT IS NOT COVERED BY THE WARRANTY................................................................................................4

1.7.5 INSTALLED DATA...................................................................................................................................................5

1.7.6 OUT OF WARRANTY REPAIRS.............................................................................................................................5

INTRODUCTION

2.1 GENERAL DESCRIPTION...................................................................................................................................................7

2.2 TERMS AND ABBREVIATIONS ........................................................................................................................................7

2.3 PRODUCT SPECIFICATIONS.............................................................................................................................................9

2.4 MODELS DESCRIPTION...................................................................................................................................................11

2.5 REGULATORY APPROVALS...........................................................................................................................................11

2.6 REGULATORY REQUIREMENTS ...................................................................................................................................11

2.7 REGULATORY STATEMENT...........................................................................................................................................11

2.8 SAFETY PRECAUTIONS...................................................................................................................................................12

2.8.1 User Operation ..........................................................................................................................................................12

2.8.2 Antenna Installation ..................................................................................................................................................12

March 2005

© Motorola Inc., 2004 98-08901C66-G

HARDWARE DESCRIPTION

3.1 G20 BLOCK DIAGRAM DESCRIPTION AND OPERATION OVERVIEW.................................................................. 13

3.1.1 g20 Block Diagram................................................................................................................................................... 13

3.1.2 Basic RS232 and Analog Audio Connectivity .........................................................................................................15

3.1.3 Basic RS232 and Digital Audio Connectivity*........................................................................................................ 15

3.1.4 Additional Recommended Connections ...................................................................................................................16

3.2 POWER SUPPLY AND CURRENT CONSUMPTION..................................................................................................... 17

3.2.1 Power Supply Design ...............................................................................................................................................17

3.2.2 g20 Current Consumption ........................................................................................................................................18

3.2.3 Turning the Unit On/Off........................................................................................................................................... 18

3.2.4 Sleep Mode Options ................................................................................................................................................. 19

3.3 COMMUNICATION INTERFACES.................................................................................................................................. 21

3.3.1 RS232 .......................................................................................................................................................................22

3.3.2 USB ..........................................................................................................................................................................23

3.3.3 SIM ........................................................................................................................................................................... 24

3.3.4 SPI ............................................................................................................................................................................25

3.3.5 Unique g20 Interfaces............................................................................................................................................... 25

3.4 AUDIO INTERFACES........................................................................................................................................................26

3.4.1 Analog Audio Interfaces........................................................................................................................................... 26

3.4.2 Digital Audio Interface.............................................................................................................................................30

3.5 ANTENNA...........................................................................................................................................................................31

3.5.1 Antenna Performance Recommendations ................................................................................................................31

3.6 ESD PROTECTION ............................................................................................................................................................31

CONNECTOR PIN ASSIGNMENTS

4.1 CONNECTORS ...................................................................................................................................................................33

4.2 PIN ASSIGNMENTS ..........................................................................................................................................................34

MECHANICAL DESCRIPTION

5.1 MECHANICAL DETAILS..................................................................................................................................................41

SERVICE SUPPORT

6.1 CUSTOMER ASSISTANCE............................................................................................................................................... 43

6.1.1 Motorola Workflow.................................................................................................................................................. 44

6.1.2 Service Centers.........................................................................................................................................................44

6.1.3 Ordering Accessories................................................................................................................................................ 45

6.2 TESTING A STANDALONE UNIT ...................................................................................................................................45

6.2.1 Test Setup .................................................................................................................................................................46

6.2.2 Test Procedure ..........................................................................................................................................................46

INDEX

ix 98-08901C66-G

LIST OF FIGURES

Figure 1. g20 Block Diagram..................................................................................................................................................... 13

Figure 2. Basic RS232 and Analog Audio Connectivity ........................................................................................................... 15

Figure 3. Basic RS232 and Digital Audio Connectivity ............................................................................................................ 16

Figure 4. Additional g20 Connectivity....................................................................................................................................... 16

Figure 5. VCC Signal During TX Periods ................................................................................................................................. 17

Figure 6. On/Off Signal Timing Diagram.................................................................................................................................. 19

Figure 7. CTS Sleep Mode Timing............................................................................................................................................ 20

Figure 8. DCE/DTE Connectivity.............................................................................................................................................. 20

Figure 9. Waking Up the g20 when the DTE wants to Send Data............................................................................................. 21

Figure 10. Waking Up the DTE when the g20 wants to Send Data........................................................................................... 21

Figure 11. g20 RS232 Interface ................................................................................................................................................. 22

Figure 12. g20 USB Connection for g20 Models....................................................................................................................... 23

Figure 13. g20 SIM Connection................................................................................................................................................. 24

Figure 14. TX_EN Transmission ............................................................................................................................................... 25

Figure 15. Antenna Detect ......................................................................................................................................................... 26

Figure 16. Headset Speaker Output Measurement Configuration ............................................................................................. 27

Figure 17. Mechanical Mounting Requirements........................................................................................................................ 41

Figure 18. Test Setup ................................................................................................................................................................. 46

98-08901C66-G x

LIST OF TABLES

Table 1. Terms and Abbreviations ............................................................................................................................................... 7

Table 2. Product Specifications.................................................................................................................................................... 9

Table 3. g20 Models................................................................................................................................................................... 11

Table 4. g20 Current Consumption............................................................................................................................................ 18

Table 5. SPI Pinout..................................................................................................................................................................... 25

Table 6. Headset Speaker Output at Maximum Volume Level ................................................................................................. 27

Table 7. SPKR_N Output in Speaker Mode at Maximum Volume Level................................................................................. 28

Table 8. SPKR_N Output when a 500mV RMS Signal is Transmitted..................................................................................... 28

Table 9. SPKR_N Output when g20 is in Handset Mode.......................................................................................................... 29

Table 10. Headset Speaker Output............................................................................................................................................. 29

Table 11. Alert Transducer Levels for the ALERT_P Signal.................................................................................................... 30

Table 12. Antenna Performance Recommendations .................................................................................................................. 31

Table 13. g20 Interface Connector Pin Assignments................................................................................................................. 34

98-08901C66-G xii

1. PREFACE

1.1 SCOPE OF THIS MANUAL

This manual introduces the g20 embedded module and describes the technical details required by the user to successfully
integrate the Motorola g20 cellular engine into an original equipment manufacturer (OEM) wireless host device.

We at Motorola want to make this guide as helpful as possible. Keep us informed of your comments and suggestions for
improvements.

You can reach us by email at: [e-mail].

1.2 WHO SHOULD USE THIS MANUAL

This manual is intended for all members of the integration team who are responsible for integrating the g20 module into the host
OEM device, including representatives from hardware, software and RF engineering disciplines.

1.3 APPLICABLE DOCUMENTS

1.3.1 Reference Documents

• g20 Developer's Kit - 9808901C67-D

• g20 AT Commands - 9808901C68-F

1.3.2 Standards

Electromagnetic Compatibility: Principles and Applications by David A Weston, published by Marcel Dekker, Inc., 270 Madi­son Avenue, New York, NY 10016 USA.

GSM 07.07 - prETS 300 916, Digital cellular telecommunication system (Phase 2+); AT command set for GSM Mobile
Equipment (ME), Version 5.2.0 or higher, Reference RE/SMG-040707QR1.

GSM 07.05, Digital cellular telecommunication system (Phase 2+); Use of Data Terminal Equipment - Data Circuit terminating;
Equipment (DTE-DCE) interface for Short Message Service (SMS) and Cell Broadcast Service (CBS), Version 5.3.0, August,
1997, Reference
TS/SMG-040705QR2.

GSM 03.40, Digital cellular telecommunication system (Phase 2+); Technical realization of the Short Message Service (SMS)
Point-to-Point (PP), Version 5.3.0, July 1996, Reference TS/SMG-040340QR2.

GSM 04.11 Digital cellular telecommunication system (Phase 2+); Point-to-Point (PP) Short Message Service (SMS) support
on mobile radio interface, Version 5.1.0, March 1996, Reference TS/SMG-030411QR.

GSM 03.38, Digital cellular telecommunication system (Phase 2+); Alphabets and language-specific information, Version

5.3.0, July 1996, Reference TS/SMG-040338QR2.

98-08901C66-G 1

GSM 11.10-1, Digital cellular telecommunication system (Phase 2); Mobile Station (MS) Conformance specification; Part 1:
Conformance specification. Draft pr ETS 300 607-1, March 1998, Reference RE/SMG-071110PR6-1.

GSM Specifications are orderable from Global Engineering Documents, 15 Inverness Way East, Englewood, Colorado 80112­5704 USA 303-792-2181 800-624-3974.

ETSI Standard PCS - 11.10-1.

GSM 02.30 Supplementary services.

GSM 03.90 USSD stage 2.

GSM 11.14 SIM toolkit.

ITU-T V.25ter

GSM Data Adapter for Motorola Handsets, AT command reference, Rev 2, June 9 1997.

ETSI standard SMG31.

GSM 05.02.

ETSI 07.60.

ETSI 0.7.07 Ver. 7.5.0.

1.4 TRADEMARKS

MOTOROLA and the Stylized M Logo are registered in the U.S. Patent and Trademark Office. All other product or service
names are the property of their respective owners.

©Motorola, Inc. 2005

1.5 HOW THIS MANUAL IS ORGANIZED

This manual contains the following chapters:

• Chapter 1 contains this Preface.

• Chapter 2 introduces the g20 unit and provides important safety instructions.

• Chapter 3 provides a detailed hardware description of the blocks and components comprising the g20.

• Chapter 4 describes the pin assignments for g20 connectors.

• Chapter 5 describes mechanical requirements for the g20 unit.

• Chapter 6 provides contact information for Motorola Service Support and Customer Assistance.

1.6 LIMITATION OF LIABILITY

The Products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the
body; in other applications intended to support or sustain life; for the planning, construction, maintenance, operation or use of
any nuclear facility; for the flight, navigation, communication of aircraft or ground support equipment; or in any other applica­tion in which the failure of the Product could create a situation where personal injury or death may occur. If CUSTOMER should
use any Product or provide any Product to a third party for any such use, CUSTOMER hereby agrees that MOTOROLA is not
liable, in whole or in part, for any claims or damages arising from such use, and further agrees to indemnify and hold MOTOR­OLA harmless from any claim, loss, cost or damage arising from such use.

EXCEPT AS SPECIFICALLY STATED ABOVE, THE PRODUCTS ARE PROVIDED "AS IS" AND MOTOROLA
MAKES NO OTHER WARRANTIES EXPRESS, IMPLIED, STATUTORY, OR OTHERWISE REGARDING THE PROD­UCTS. MOTOROLA SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE, OR ARISING FROM A COURSE OF DEALING OR USAGE OF TRADE.

2 98-08901C66-G

Under no circumstances shall MOTOROLA be liable to CUSTOMER or any other party for any costs, lost revenue or profits
or for any other special, incidental or consequential damages, even if MOTOROLA has been informed of such potential loss or
damage. And in no event shall MOTOROLA's liability to CUSTOMER for damages of any nature exceed the total purchase
price CUSTOMER paid for the Product at issue in the dispute, except direct damages resulting from patent and/or copyright
infringement, which shall be governed by the "INDEMNITY" Section of this Agreement.

The preceding states MOTOROLA's entire liability for MOTOROLA's breach or failure to perform under any provision of this
Agreement.

1.7 WARRANTY NOTIFICATION

Motorola guarantees to you, the original purchaser, the Personal Communicator and accessories which you have purchased from
an authorised Motorola dealer (the "Products"), to be in conformance with the applicable Motorola specifications current at the
time of manufacture for a term of [1] year from date of purchase of the Product(s) (Warranty Term).

You must inform Motorola of the lack of conformity to the applicable specifications of any of the Products within a period of
two (2) months from the date on which you detect a defect in material, workmanship or lack of conformity and in any event
within a term not to exceed the Warranty Term, and must immediately submit the Product for service to Motorola's Authorised
Repair or Service Center. Motorola shall not be bound by Product related statements not directly made by Motorola nor any
warranty obligations applicable to the seller.

A list of the Motorola Call Center numbers is enclosed with this Product.

During the Warranty term, Motorola will, at its discretion and without extra charge, as your exclusive remedy, repair or replace
your Product which does not comply with this warranty; or failing this, to reimburse the price of the Product but reduced to take
into account the use you have had of the Product since it was delivered. This warranty will expire at the end of the Warranty
Term.

This is the complete and exclusive warranty for a Motorola Personal Communicator and accessories and in lieu of all other
warranties, terms and conditions, whether express or implied.

Where you purchase the product other than as a consumer, Motorola disclaims all other warranties, terms and conditions express
or implied, such as fitness for purpose and satisfactory quality.

In no event shall Motorola be liable for damages nor loss of data in excess of the purchase price nor for any incidental special
or consequential damages* arising out of the use or inability to use the Product, to the full extent such may be disclaimed by law.

This Warranty does not affect any statutory rights that you may have if you are a consumer, such as a warranty of satisfactory
quality and fit for the purpose for which products of the same type are normally used under normal use and service, nor any
rights against the seller of the Products arising from your purchase and sales contract.

(*)including without limitation loss of use, loss of time, loss of data, inconvenience, commercial loss, lost profits or savings.

1.7.1 HOW TO GET WARRANTY SERVICE?

In most cases the authorised Motorola dealer which sold and/or installed your Motorola Personal Communicator and original
accessories will honour a warranty claim and/or provide warranty service. Alternatively, for further information on how to get
warranty service please contact either the customer service department of your service provider or Motorola's call Center at the
telephone numbers below for your country.

1.7.2 CLAIMING

In order to claim the warranty service you must return the Personal Communicator and/or accessories in question to Motorola's
Authorised Repair or Service Center in the original configuration and packaging as supplied by Motorola .Please avoid leaving
any supplementary items like SIM cards. The Product should also be accompanied by a label with your name, address, and
telephone number; name of operator and a description of the problem. In the case of vehicular installation, the vehicle in which

98-08901C66-G 3

the Personal Communicator is installed should be driven to the Authorised Repair or Service Center, as analysis of any problem
may require inspection of the entire vehicular installation.

In order to be eligible to receive warranty service, you must present your receipt of purchase or a comparable substitute proof
of purchase bearing the date of purchase. The phone should also clearly display the original compatible electronic serial number
(IMEI) and mechanic serial number [MSN]. Such information is contained with the Product.

You must ensure that all and any repairs or servicing is handled at all times by a Motorola Authorised Service Center in accor­dance with the Motorola Service requirements

In some cases, you may be requested to provide additional information concerning the maintenance of the Products by Motorola
Authorised Service Centers only, therefore it is important to keep a record of any previous repairs, and make them available if
questions arise concerning maintenance

1.7.3 CONDITIONS

This warranty will not apply if the type or serial numbers on the Product has been altered, deleted, duplicated, removed, or made
illegible. Motorola reserves the right to refuse free-of-charge warranty service if the requested documentation can not be
presented or if the information is incomplete, illegible or incompatible with the factory records.

Repair, at Motorola's option, may include reflashing of software, the replacement of parts or boards with functionally equivalent,
reconditioned or new parts or boards. Replaced parts, accessories, batteries, or boards are warranted for the balance of the orig­inal warranty time period. The Warranty Term will not be extended. All original accessories, batteries, parts, and Personal
Communicator equipment that have been replaced shall become the property of Motorola. Motorola does not warrant the instal­lation, maintenance or service of the products, accessories, batteries or parts.

Motorola will not be responsible in any way for problems or damage caused by any ancillary equipment not furnished by Motor­ola which is attached to or used in connection with the Products, or for operation of Motorola equipment with any ancillary
equipment and all such equipment is expressly excluded from this warranty.

When the Product is used in conjunction with ancillary or peripheral equipment not supplied by Motorola, Motorola does not
warrant the operation of the Product/peripheral combination and Motorola will not honour any warranty claim where the Prod­uct is used in such a combination and it is determined by Motorola that there is no fault with the Product. Motorola specifically
disclaims any responsibility for any damage, whether or not to Motorola equipment, caused in any way by the use of the Personal
Communicator, accessories, software applications and peripherals (specific examples include, but are not limited to: batteries,
chargers, adapters, and power supplies) when such accessories ,software applications and peripherals are not manufactured and
supplied by Motorola.

1.7.4 WHAT IS NOT COVERED BY THE WARRANTY

This warranty is not valid if the defects are due to damage, misuse, tampering, neglect or lack of care and in case of alterations
or repair carried out by unauthorised persons.

The following are examples of defects or damage not covered by this product warranty

1. Defects or damage resulting from use of the Product in other than its normal and customary manner.

2. Defects or damage from misuse, access to incompatible sources, accident or neglect.

3. Defects or damage from improper testing, operation, maintenance, installation, adjustment, unauthorised software appli­cations or any alteration or modification of any kind.

4. Breakage or damage to antennas unless caused directly by defects in material or workmanship.

5. Products disassembled or repaired other than by Motorola in such a manner as to adversely affect performance or prevent
adequate inspection and testing to verify any warranty claim.

6. Defects or damage due to range, coverage, availability, grade of service, or operation of the cellular system by the cellular
operator.

4 98-08901C66-G

7. Defects or damage due to moist, liquid or spills of food.

8. Control unit coil cords in the Product that are stretched or have the modular tab broken.

9. All plastic surfaces and all other externally exposed parts that are scratched or damaged due to customer normal use.

10. Leather cases (which are covered under separate manufacturer's warranties).

11. Products rented on a temporary basis.

12. Periodic maintenance and repair or replacement of parts due to normal wear and tear.

The talk-time, stand-by time and total life cycle of a Motorola rechargeable battery for your Personal
Communicator will depend on usage conditions and network configurations. As a consumable product, the

Note

specifications indicate that you should be able to obtain optimum performance for your Motorola Personal
Communicator within the first six months from date of purchase and up-to (200) charges(Optimum Perfor­mance Time).

The warranty for Motorola rechargeable batteries becomes void if (i) the batteries are charged other than by Motorola approved
battery chargers specified for the charging of the battery, (ii) any of the seals on the battery are broken or show evidence of
tampering, (iii) the battery is used in equipment or service other than the cellular telephone equipment for which it is specified.

Depending on operating conditions and your usage habits, wear and tear might take place of components including mechanical
problems related to Product housing, paint, assembly, sub-assemblies, displays and keyboards and any accessories which are
not part of the Product's in-box configuration. The rectification of faults generated through wear and tear and the use of consum­able items like batteries beyond their Optimum Performance Time as indicated in the product manual is considered to be your
responsibility and therefore Motorola will not provide the free Warranty repair service for these items

1.7.5 INSTALLED DATA

Please make and retain a note of all data you have inserted into your Product for example names, addresses, phone numbers,
user and access codes, notes etc before submitting your Product for a Warranty service as such data may be deleted or erased as
part of the repair or service process.

Please note if you have downloaded material onto your Product, for example ring tones, ring tunes, screensavers, wallpaper,
games etc these may be deleted or erased as part of the repair process or testing process. Motorola shall not be responsible for
such matters. The repair or testing process should not affect any such material that was installed by Motorola on your Product
as a standard feature.

1.7.6 OUT OF WARRANTY REPAIRS

If you request Motorola to repair your Product any time after the Warranty term or where this warranty does not apply due to
the nature of the defect or fault, then Motorola may in its discretion carry out such repairs subject to you paying Motorola its
fees for such a repair or it may refer you to an authorised third party to carry out such repairs.

98-08901C66-G 5

2. INTRODUCTION

2.1 GENERAL DESCRIPTION

The g20 is Motorola’s newest family of embedded cellular products. Motorola continues its tradition of excellence by
introducing this new cellular engine family for GSM/GPRS communications, consisting of the d10, the d15 and the g18.

The new module is similar to a condensed cellular phone core, and can be integrated in any system or product that needs to
transfer voice or data information. Thus, it significantly enhances the system’s capabilities, transforming it from a standalone,
isolated product to a powerful component connected to communication nets.

The new g20 is extremely small in dimensions, yet packed with a host of highly-advanced features designed to facilitate fast
and easy integration with OEM user products. It significantly shortens the development process for OEM developers, thanks to
its wide range of built-in applications, and minimizes the product’s time to market.

The g20 module is ideally suited for the automotive, telemetry, security, insurance and EPOS industries, for delivery and
handheld terminals, and for PDA markets.

2.2 TERMS AND ABBREVIATIONS

This section provides definitions for terms and acronyms used in this document.

Table 1. Terms and Abbreviations

Acronym/Term Definition/Description

AOC Advice of Charge

CSD Circuit-switched Data

CTS Clear to Send

DCD Data Carrier Detect

DCE Data Communication Equipment (such as modems)

DCS Digital Cellular System (GSM in the 1800MHz band)

DOC Department of Communications (Canada)

DSP Digital Signal Processor

DSR Data Set Ready

DTE Data Terminal Equipment (such as terminals, PCs and so on)

DTMF Dual-Tone Multi-Frequency

DTR Data Terminal Ready

EGSM Extended Global System for Mobile Communications

EIRP Effective Isotropic Radiated Power

EMC Electromagnetic Compatibility

EOTD Enhanced Observed Time Difference

EPOS Electronic Point of Sale

ERP Effective Radiated Power

98-08901C66-G 7

Table 1. Terms and Abbreviations (Continued)

Acronym/Term Definition/Description

ESD Electrostatic Discharge

ETSI European Telecommunication Standards Institute

FCC Federal Communications Commission (U.S.)

FTA Full Type Approval

GCF GSM Certification Forum

GPIO General Purpose Input/Output

GPRS General Packet Radio Service

GSM Global System for Mobile Communications

IC Integrated Circuit

LNA Low-noise Amplifier

MMCX Miniature Micro Coax

MO Mobile Originated

MT Mobile Terminated

OEM Original Equipment Manufacturer

PCB Printed Circuit Board

PCM Pulse Code Modulation

PCS Personal Communication System (also known as GSM 1900)

PDA Personal Data Assistant

PDU Packet Data Unit

PLL Phase-locked Loop

PTCRB PCS-1900 Type Certification Review Board (GSM North America)

R&TTE Radio and Telecommunications Terminal Equipment

RMS Root Mean Square

RI Ring Indicator

RTS Request To Send

SAR Specific Absorption Rate

SIM Subscriber Identity Module

SMS Short Message Service

SPI Serial Peripheral Interface

TDMA Time Division Multiple Access

UART Universal Asynchronous Receiver Transmitter

USB Universal Serial Bus

USSD Unstructured Supplementary Services Data

VCC Voltage Common Collector

VSWR Voltage Standing Wave Ratio

8 98-08901C66-G

2.3 PRODUCT SPECIFICATIONS

Table 2. Product Specifications

Operating systems: EGSM: 900/1800 MHz

Size (F3003 - F3004): 45.2 x 24.4 x 6.7 mm height refer to the distance

Size (F3012 - F3013): 45.2 x 24.4 x 6.2 mm height refer to the distance

Mounting: Two

Weight: 11.9 grams

Operational temperature: -20°C +70°C

Functional temperature: -30°C +85°C

Storage temperature: -40°C +85°C

Operating voltage: Voltage: 3.0 - 4.2 V

Current consumption: < 2.5 mA @ DRX9 (Idle mode)

Tx power: • 0.8 W, 850 MHz

Connectors: • Single 70-pin, board-to-board

SIM Card: • Local SIM connectivity

Serial: • RS232:

GPRS: • Multi-slot class 8 (4 down; 1 up)

CSD: Max BR 14.4 Kbps

SMS: • MO/MT Text and PDU modes

FAX Class 1

Product Features

GSM: 850/1900 MHz

Physical Characteristics

between the customer's board and the g20 top
level

between the customer's board and the g20 top
level

Ø2.4 mm holes

Environmental

Performance

• 2 W, 900 MHz

• 1 W, 1800/1900 MHz

Interfaces

•RF MMCX

•32K SIM

• 1.8/3.0 V

• BR from 300 bps to 115 Kbps

• Auto BR from 300 bps to 115 Kbps

•USB

• 12 Mbps USB specifications, Rev. 1.1

Data Features

• Max BR 85.6 Kbps

• Class B GSM 07.10 multiplexing protocol

• Coding scheme CS1-CS4

• Cell broadcast

98-08901C66-G 9

Table 2. Product Specifications (Continued)

Voice Features

Telephony

Digital audio

Differential analog audio lines

Vocoders EFR/ER/FR/AMR

DTMF support

Audio control: echo cancellation, noise suppression, side tone and gain control

GSM Supplementary Service

USSD Phase II

Call forwarding

Call hold, waiting and multiparty

Call diverting

Missed-call indicator

AOC

Call barring

Character Set

UTF8

UCS2

Control/Status Indicators

GPRS coverage

Wakeup

TX enable

Reset

Antenna Detect

Features over RS232

Embedded TCP/IP stack

STK Class II

Emergency and Location

FCC E911 Phase II Location Mandate using EOTD

AT C om m and Set

GSM 07.05

GSM 07.07

Motorola proprietary AT commands

Accessories

Firmware data loader

Data logger

Developer Kit

Specifications are subject to change without prior notice.

Note

10 98-08901C66-G

2.4 MODELS DESCRIPTION

Table 3 lists the available g20 models.

Table 3. g20 Models

Model

F3003 GSM 850/1900

F3004 EGSM 900/1800

Operating

Bands

Interface Connectors Serial Interface

• 70-pin 3 mm stacking height connector

• MMCX RF connector

• 70-pin 3 mm stacking height connector

• MMCX RF connector

USB/RS232

USB/RS232

2.5 REGULATORY APPROVALS

The following regulatory approvals apply for the g20 module:

•FCC

• DOC

• PTCRB

•R&TTE

•EMC

•GCF

2.6 REGULATORY REQUIREMENTS

The Federal Communications Commission (FEC) requires application for certification of digital devices in accordance with
CFR Title 47, Part 2 and Part 15. This includes Electromagnetic Energy Exposure (EME) testing. As the g20 modem is not a
standalone transceiver but is an integrated module, the g20 cannot be tested by itself for EME certification. It is, however, the
integrator’s responsibility to have the completed device tested for EME certification.

2.7 REGULATORY STATEMENT

The following safety precautions must be observed during all phases of the operation, usage, service or repair of any cellular
terminal or mobile incorporating the g20 module. Manufacturers of the cellular terminal are advised to convey the following
safety information to users and operating personnel, and to incorporate these guidelines into all manuals supplied with the prod­uct. Failure to comply with these precautions violates safety standards of design, manufacture and intended use of the product.
Motorola assumes no liability for customer failure to comply with these precautions.

13. The g20 must be operated at the voltages described in the technical documentation.

14. The g20 must not be mechanically nor electrically changed. Use of connectors should follow the guidance of the technical
documentation.

15. The g20 is designed the meet the EMC requirements of ETS 300 342.

16. When integrating the g20 into a system, Motorola recommends testing the system to ETS300342-1.

17. The g20 meets the safety requirements of EN60950.

18. Systems using the g20 are subject to mandatory EMC testing under directive 89/336/EEC (see item 3 above). Other
directives, such as the LVD directive 73/23/EE, may also apply to a system using the g20 module.

98-08901C66-G 11

2.8 SAFETY PRECAUTIONS

2.8.1 User Operation

Do not operate your unit when a person is within 8 inches (20 centimeters) of the antenna. A person or object within 8 inches
(20 centimeters) of the antenna could impair call quality and may cause the phone to operate at a higher power level than neces­sary.

IMPORTANT: The unit must be installed in a manner that provides a minimum separation distance of
20 cm or more between the antenna and persons to satisfy FCC RF exposure requirements for mobile transmitting devices.

IMPORTANT: To comply with the FCC RF exposure limits and satisfy the categorical exclusion requirements for mobile
transmitters, the following requirements must be met:

2.8.2 Antenna Installation

• The antenna installation must provide a minimum separation distance of 20 cm from users and nearby persons and must not

be co-located or operating in conjunction with any other antenna or transmitter.

• The combined cable loss and antenna gain must not exceed +

(Cellular) / 3.0 W EIRP (PCS) to qualify for categorical exclusion requirements of 2.1091. OEM installers must be provided
with antenna installation instruction and transmitter operating conditions for satisfying RF exposure compliance.

9.9 dBi and total system output must not exceed 1.5 W ERP

12 98-08901C66-G

3. HARDWARE DESCRIPTION

3.1 G20 BLOCK DIAGRAM DESCRIPTION AND OPERATION OVERVIEW

This chapter describes the basic blocks comprising the g20 module and the connectivity options for the module.

3.1.1 g20 Block Diagram

Figure 1 shows a block diagram for the g20 module:

Ant

Serial

USB

Driver

PCM

SIM

GPIO

SPI

ADC

Audio

Charger

Power

On/Off/IGN

Interface Connector

Transmitter

IC

Memories

Control

Receiver

IC

Main

Processor

&

DSP

Power &

Audio

Management

IC

g20

Figure 1. g20 Block Diagram

The g20 consists of the following blocks:

• Power and Audio Management IC: This block is responsible for the power on/off process, analog audio drivers, internal

regulators, realtime clock activities, and the battery charging process. When an On command is received, this IC wakes up
the internal regulators and controls the reset process. This activity turns the unit on. When an Off command is received, this
IC sends the request to the main processor, which in turn shuts down the unit in an orderly fashion. During shutdown, the
unit is disconnected from the network, all tasks are terminated and the regulators are shut down. The on/off inputs (On/Off
and Ignition) are always on, even when the unit is off.

98-08901C66-G 13

• Main Processor and DSP: This block is responsible for all the main tasks in the unit. It contains the following components:

• Main processor

• DSP for controlling speech options

• UART

• USB block

• Digital audio driver

• SIM card

• Two SPI buses (one internal and one externally accessible)

• Main clock (26 MHz)

• Address/data buses

• RF PLL

• Controller to the RF ICs, which is the heart of the unit

This module provides the following connectivity:

• Address/data bus

• UART to the user connector

• USB via a USB driver to the user connector

• Digital audio (PCM) to the user connector

• SIM card interface

• SPI to the user connector

• SPI to control the RF ICs

• Control signals to the power amplifier IC

• Handshake with the Power and Audio Management IC

• General I/O to the user connector

• Receiver Block: This block is an RF block that contains all the receiver channels. It contains the following components:

• Front filters

• LNAs

•Mixers

•VCOs

• I/Q outputs

• Control signals

• Transmitter Block: This is an RF block that contains all the transmitter channels. It contains the following components:

• Power amplifiers

• Power control loop

• Antenna switch

• Harmonic filter

• Input buffers

• Control signals

• Antenna connection

14 98-08901C66-G

3.1.2 Basic RS232 and Analog Audio Connectivity

The following basic g20 connectivity requirements apply for UART (RS232) and analog audio connections (see Figure 2 for
reference):

• The RS232 is connected via eight pins to the g20.

• The SIM card is connected via five pins to the SIM driver of the g20.

• The microphone is connected via two pins to the g20 (Mic and Mic Ground).

• The Speaker is connected via two differential lines to the g20.

• The power supply is connected via eight pins (four VCC and four Ground) to the g20.

• The On/Off or Ignition pin is connected.

Ant

DTE

UART

SIM

Socket

Mic

SPKR

Power

Supply

On/Off or

Ignition

Transmitter

IC

Memories

Control

Receiver

IC

g20

Main

Processor

&

DSP

Power &

Audio

Management

IC

Serial

USB

Driver

PCM

SIM

GPIO

SPI

ADC

Audio

Charger

Power

On/Off - IGN

Interface Connector

Figure 2. Basic RS232 and Analog Audio Connectivity

3.1.3 Basic RS232 and Digital Audio Connectivity

*

The following basic g20 connectivity requirements apply for UART (RS232) and digital audio connections (see Figure 3 for
reference):

• The RS232 is connected via eight pins to the g20.

• The SIM card socket is connected via five pins to the SIM driver of the g20.

• The DTE DSP is connected via four pins to the g20 (PCM).

• The power supply is connected via eight pins (four VCC and four Ground) to the g20.

• The On/Off or Ignition pin is connected.

*

Support for this feature depends on the current g20 release.

98-08901C66-G 15

Ant

DTE

UART

DTE
DSP

SIM

Socket

Power

Supply

On/Off or

Ignition

Transmitter

IC

Memories

Control

Receiver

Serial

USB

Main

Processor

&

DSP

IC

g20

Power &

Audio

Management

IC

Driver

PCM

SIM

GPIO

SPI

ADC

Audio

Charger

Power

On/Off - IGN

Interface Connector

Figure 3. Basic RS232 and Digital Audio Connectivity

3.1.4 Additional Recommended Connections

Additional g20 connectivity options are described below (see Figure 4 for reference):

• A USB connector that is connected via three lines to the g20. In this case, when USB is used, the DTE UART should be in

tri-state (high impedance).

• An SPI block that is connected via five pins to the g20 (for debug accessibility).

Ant

Transmitter

IC

Memories

Main

Control

Processor

&

DSP

Receiver

IC

Power &

Audio

Management

IC

g20

Figure 4. Additional g20 Connectivity

Serial

USB

Driver

PCM

SIM

GPIO

SPI

ADC

Audio

Charger

Power

USB

Connector

SPI

Device

Interface Connector

16 98-08901C66-G

3.2 POWER SUPPLY AND CURRENT CONSUMPTION

This section describes the following power-related considerations for the g20:

• Power supply design

• g20 current consumption

• Turning the unit on/off

• Sleep mode options

3.2.1 Power Supply Design

The following power supply design considerations apply to the g20:

• The g20 is designed to operate between 3.0 V to 4.2 V on the g20 input (after all losses). In order to reduce battery power

consumption, it is important to verify power supply line and regulator losses in the PCB.

• The g20 is a GSM/GPRS phone that transmits in 0.5 ms pulses every 4.6 ms. The peak current is approximately 2.0 A.

• When the power supply is lower than 2.85 V, the g20 software determines that the battery is low and disconnects the unit.

• When the voltage is greater than 4.25 V, the g20 software detects an over voltage condition and does not allow the unit to

establish a call.

• The VCC line typically drops during TX periods.

Transmit

TX TX TX

Periods

VCC

Figure 5. VCC Signal During TX Periods

To minimize the ∆, it is recommended to use lines that are as short as possible, and to place a 1000uF capacitor (or the maximum
possible) in the g20 VCC input. (When a battery is used, there is no need for a large capacitor.)

It is recommended to keep the ∆ less than 0.3 V.

The power supply should be able to drive at least 2.5 A at 3 V DC.

Note

3.2.1.1 Power Supply RF Filtering

It is recommended to add RF filtering to the DC lines.

Use 100nF, 39pF, 22pF or 8.2pF capacitors in parallel to the power supply lines (close to the g20 connector). The following
capacitor requirements apply:

• 100nF is for filtering logic data noise (clocks, serial communications, and so on).

• 39pF is used for 850/900 bands.

• 22pF is used for 900 band.

• 8.2pF is used for 1800/1900 bands.

The appropriate capacitor value(s) should be selected according to the GSM band used by the customer.

98-08901C66-G 17

3.2.2 g20 Current Consumption

In order to design the power supply correctly and to calculate the battery life, you should take into account the current
consumption of the g20 when operating in different modes.

Table 4. g20 Current Consumption

Mode Current Consumption (mA RMS)

g20 in Sleep mode (camped and
Sleep-mode enabled)

g20 during search time < 40 mA, RMS, Typical 25 mA, RMS

g20 off < 100 uA – Typical 25 uA

g20 during a call

GSM 900 @ Power level #5 < 350 mA, Typical 270 mA

GSM 850 @ Power level #7 < 250 mA, Typical 185 mA

DCS 1800 @ Power level #0 < 300 mA, Typical 220 mA

PCS 1900 @ Power level #5 < 300 mA, Typical 240 mA

< 2.5 mA, RMS @ DRX9, Typical 2.2 mA
< 4.5 mA, RMS @ DRX2, Typical 3.5 mA

@ Power level #10, Typical 160 mA
@ Power level #19, Typical 135 mA

@ Power level #10, Typical 160 mA
@ Power level #19, Typical 135 mA

@ Power level #10, Typical 160 mA
@ Power level #19, Typical 135 mA

@ Power level #10, Typical 160 mA
@ Power level #19, Typical 135 mA

DRX2/9 is the rate used by the base station to query the mobile station. The network operator sets this parameter.

Note

3.2.3 Turning the Unit On/Off

Two different mechanisms are available to turn the g20 on and off:

• On/Off signal (Pin 53)

• Ignition signal (Pin 51)

The g20 power-on and power-off timing may vary slightly, depending on the software version.

Note

18 98-08901C66-G

3.2.3.1 On/Off Signal

The on/off signal is an active-low toggle switch. After power is applied to the g20, the on/off signal is pulled high to VCC by
an internal 200KΩ resistor.

To turn the g20 on, the on/off signal should be pulled low for a minimum of 800 ms (T1). This will initiate the power-on process,
which lasts about five seconds, after which the g20 is ready to communicate.

To turn the g20 off, the on/off signal should be pulled low for a minimum of two seconds. This will initiate the power-off
process, which lasts about eight seconds, after which the g20 will shut down. The g20 can be turned off only if at least 10 seconds
have elapsed since the last power on.

Figure 6 shows the timing diagram for the on/off signal.

T1 T2

Figure 6. On/Off Signal Timing Diagram

In Figure 6, the following timing requirements apply:

• T1 minimum = 800 ms.

• T2 minimum = 10 seconds.

• T3 minimum = 2 seconds.

T3

3.2.3.2 Ignition Signal

The ignition signal turns the g20 on and off, depending on its logic state.

To turn the g20 on, the ignition signal must be pulled high. This initiates the power-on process, which lasts about five seconds,
after which the g20 is ready to communicate. The g20 remains active for the duration of the ignition signal remaining high.

To turn the g20 off, the ignition signal must be pulled low. This initiates the power-off process, which may last up to 30 seconds,
after which the g20 will shut down. The ignition signal must remain low for the duration of the power-off process, until the g20
shuts down. Otherwise, the power-off process may be interrupted or may not complete.

3.2.4 Sleep Mode Options

This section describes how the g20 can be awakened by the DTE and vice-versa.

The DCE (g20) and the DTE can incorporate a sleep mechanism in their application in order to conserve battery life.

Sleep mode enables the g20 to be awakened when the DTE wants to communicate with it. Conversely, it also enables the DTE
to be awakened by the g20 when the g20 wants to communicate with it. The g20 will not enter sleep mode if the USB is
connected.

3.2.4.1 General

• The g20 Sleep Mode option can be enabled or disabled using ATS24.

• Sleep mode is activated by sending ATS24 = n, where n = 1, 2, 3 or 4 seconds. (To disable Sleep mode, send ATS24=0.)

• The g20 drops the CTS (h/w Flow Control) when it is in Sleep mode.

• The g20 does not enter Sleep mode when data is present on TXD or RXD lines.

• At the end of the TXD (meaning, the TXD buffer is empty), the g20 waits n seconds (as defined in ATS24 = n) before enter-

ing Sleep mode.

98-08901C66-G 19

• The DTE uses CTS to send data only when the g20 is awake. The DTE waits when the g20 is in Sleep mode.

• When the g20 is asleep, the CTS line will blink.

• The DTE should drop RTS during the sleep period in order to prevent the loss of data sent by the g20.

g20 Sleep Periods

Awake

CTS

Active

3.2.4.2 DCE/DTE Connectivity

Figure 8 shows DCE/DTE connectivity:

g20

(DCE)

Awake

Sleep

Inactive

Figure 7. CTS Sleep Mode Timing

RTS

9

CTS

15

TXD

21

Wake-up Out

26

Sleep

Inactive

Active

User

UART

(DTE)

16

Wake-up In

Figure 8. DCE/DTE Connectivity

Waking Up the g20:

The following apply when waking up the g20:

• The Wake-up In line is used to awaken the g20. This input is routed into an Interrupt in the g20.

• Whenever the Wake-up In line is at logic “low”, the g20 remains in an awake state.

• When the DTE needs to send data, it should activate this line, wait 30 ms (the wake time required for the g20), and then start

sending the data.

20 98-08901C66-G

• While the DTE is sending data, the wake-up line should remain low, so that the g20 does not enter Sleep mode.

DTE TXD

Wake-up

In line

30 ms 30 ms 30 ms

Figure 9. Waking Up the g20 when the DTE wants to Send Data

Waking Up the DTE:

The following apply when waking up the DTE:

• The g20 uses the Wake-up Out line to indicate to the DTE that data is present.

• The DTE should not enter Sleep mode when the Wake-up Out line is low.

• When the g20 has data to send to the DTE, it drops the Wake-up Out line to low.

• The g20 will send the Wake-up Out line #ms to low, as indicated by S102 in Figure 10.

• While the g20 is sending data, the Wake-up Out line remains low.

• After the sending of data is completed, the g20 brings the Wake-up Out line to high.

• The DTE should keep RTS off during this sleep period in order to avoid sending data when it is not ready.

RXD

Wake-up
Out line

S102 ms S102 ms S102 ms

Figure 10. Waking Up the DTE when the g20 wants to Send Data

3.3 COMMUNICATION INTERFACES

This section describes the following four interfaces that are available in the g20:

• RS232

•USB

•SIM

•SPI

98-08901C66-G 21

3.3.1 RS232

The following apply when using the RS2332 interface of the g20:

• The g20 supports full hardware flow control (8 pins), software flow control (Xon/Xoff) and non-flow control.

• The g20 UART is connected directly to the interface connector.

• The g20 is a DCE device. Applicable line terminology is shown in Figure 11.

TXD

RXD

RTS

CTS

DTR

DSR

DCD

RI

User

UART

(DTE)

g20

(DCE)

21

11

9

15

19

13

17

23

Figure 11. g20 RS232 Interface

3.3.1.1 RS232 Levels

RS232 levels are as follows:

• Vih = 1.95 V minimum, 3.0 V maximum

• Vil = 0.8 V maximum

• Voh = 2.56 V minimum @ 100 uA

• Vol = 0.2 V maximum @ 100 uA

A buffer is required whenever DTE levels do not match g20 levels (not 5V tolerant).

Note

3.3.1.2 RS232 Connection

As shown in Figure 12, the g20 can be connected to the DTE UART using all eight RS232 signals.

The g20 selects its communication channel, RS232 or USB, depending on the state of the USB_VBUS signal (pin 10) at power
up. The g20 operates in RS232 mode if the USB_VBUS signal is low at power up and remains low during operation.

The g20 does not support dynamic switching between RS232 and USB channels during operation, and does not support
simultaneous operation.

When the g20 is switched off, it is recommended to keep the RS232 signals of the DTE at tri-state or at a low level
in order to prevent potential latch-up.

Note

22 98-08901C66-G

3.3.2 USB

The g20 selects its communication channel, RS232 or USB, depending on the state of the USB_VBUS signal (pin 10) at power
up. The g20 operates in USB mode if the USB_VBUS signal is high at power up and remains high during operation. The
USB_VBUS signal is the power line of the USB interface, which powers the USB circuitry.

The g20 does not support dynamic switching between RS232 and USB channels during operation, and does not support
simultaneous operation

When USB is used, the DTE device must unload (meaning disconnect or place in tri-state) the RS232 lines. Otherwise, the USB
may not operate properly.

The USB port is also used to load software into the g20. It is recommended to include connectivity to this port in the user
application.

The g20 supports USB 1.1 at a baud rate of 12 Mbps.

3.3.2.1 USB Connection

A USB connection diagram is shown in Figure 12.

U
A
R
T

U
S
B

g20 Main

Processor

g20

TXD

RXD

RTS

M
U

X

USB

Detect

USB

Driver

USB VBUS

Figure 12. g20 USB Connection for g20 Models

CTS

DTR

DSR

DCD

RI

D+

D-

21

11

15

19

13

17

23

12

14

10

DTE

D

9

T
E

U
A
R
T

3 state

USB

Connector

As shown in Figure 12, the g20 USB is connected via three lines to the USB connector in the user application: D+, D- and USB
VBUS. When USB VBUS is applied, the g20 detects it and switches the main processor to USB mode.

The DTE UART loads the USB driver/main processor lines. Therefore, the UART should be kept in tri-state.

USB usage eliminates sleep mode in the g20.

Note

98-08901C66-G 23

3.3.3 SIM

The g20 includes a SIM card driver, however, it does not contain a SIM socket. SIM signals are routed to the interface connector
and include all the functionality required for SIM card operation. The SIM card socket must be located in the customer
application, and connected to the g20 interface connector as described in the following section.

3.3.3.1 SIM Connection

Figure 13 shows a g20 SIM connection:

Figure 13. g20 SIM Connection

The following apply for g20 SIM connections:

• The g20 passes all ETSI tests when an external socket is connected to the g20 with lines shorter than 10 cm. Longer signal

connections may require additional testing to be performed.

• The g20 supports 3.0V and 1.8V SIM cards.

• The SIM card detect signal, SIM_PD, operates in active low logic.

The SIM card signals must be carefully routed to minimize ESD and EMI susceptibility. The following are guidelines for proper
SIM application operation:

• The SIM ground must be connected to the main ground through an inductive element.

• The SIM card socket should be located away from the antenna as far as possible.

• The SIM logic signals, DIO, CLK, RST and PD, may need to be filtered with 10pF capacitors, depending on the application

and its distance from the antenna.

• The SIM detect signal, SIM_PD, should be connected to the g20 through a 15uH inductor.

• Low capacitance zener diodes should be placed as close as possible to the SIM card socket contacts, for proper ESD

protection.

24 98-08901C66-G

3.3.4 SPI

The SPI is a standard microprocessor bus used as a g20 debugging port. This port activates a debug option that enables logs to
be taken from the g20 while it is operating. It is recommended that this bus be accessible in the user application. In the g20
Developer’s Kit, the SPI bus is converted to an RS232 protocol using a special interface circuit. It then uses the standard RS232
port for debugging. Table 5 shows the pins available on the SPI bus.

3.3.4.1 SPI Connection

Table 5. SPI Pinout

Pin # Name Function Input/Output

70 SPI_CS SPI chip-select Output

62 SPI_IRQ_N SPI Interrupt Input

64 SPI_DIN SPI MISO input Input

68 SPI_DOUT SPI MOSI output Output

66 SPI_CLK SPI clock Output

3.3.5 Unique g20 Interfaces

The g20 contains unique functions (pins) that may be required by selected user applications, such as TX_EN, Antenna Detect,
GPRS Detect and Entertainment Mute. Each of these functions is described in the sections that follow.

3.3.5.1 Transmit Enable

This pin indicates when the g20 is transmitting RF in the antenna.

RF TransmissionNo RF Transmitted No RF Transmitted

Figure 14. TX_EN Transmission

3.3.5.2 GPRS Coverage Indication

This pin indicates whether or not the g20 is located in an area with GPRS network coverage. This pin can be used to indicate
the GPRS coverage status before GPRS section activation has occurred, or before a switch to circuit-switched data is made. The
default operation of this signal is active low, meaning this signal is at 0 when GPRS coverage is available. It is possible to switch
the signal’s polarity to active high using an AT command. Refer to the g20 AT Commands document (9808901C68-O) for the
AT commands description.

98-08901C66-G 25

3.3.5.3 Antenna Detect

This pin indicates whether or not the antenna is inserted. This option can be used with antennas with a resistance to ground of
less than 100K. The antenna detect circuit detects whether the ohmic resistance of the antenna is 100 Kohm or lower, which is
required for the antenna to be detected. If the ohmic resistance is higher than 100 Kohm, the antenna is not detected.

In software versions 34D and later, this signal has been collaborated to match the logic detection threshold of the g20, and
exhibits best results when connected back to the g20. A dedicated g20 input signal, pin 37, is available for the antenna detection
input. This is to ensure proper operation of the antenna-detect AT command, which enables software indication of the antenna
state.

Antenna DetectedAntenna Not Detected

Figure 15. Antenna Detect

3.4 AUDIO INTERFACES

The g20 has an analog audio interface and a digital audio interface. Both of these interfaces are described in the sections that
follow.

3.4.1 Analog Audio Interfaces

The g20 supports microphone input, headset microphone input, differential speaker output, and a differential alert speaker.

3.4.1.1 Analog Input

The g20 has two different analog inputs, referenced to the microphone ground (pin 59). The g20 contains an analog amplifier
with a default gain of 16dB, which can be adjusted in seven steps between 0 and 31dB using the AT+MMICG command. For
more details about this command, refer to the g20 AT Commands document (9808901C68).

When the default gain of 16dB is used, then the level considerations should be as follows:

• Headset microphone: Pin 57 is the headset microphone input. The input for this line can come directly from a headset

microphone. In order for the headset microphone to be active, the headset interrupt signal (pin 55) needs to be pulled low.
The maximum input to the g20 headset microphone before there is signal distortion in the network is 12 mvRMS.

• Hands-free microphone: Pin 61 is the microphone input to the g20. When the headset interrupt signal is not pulled low,

this microphone will be active. The maximum input to the g20 microphone before there is signal distortion in the network is
32 mvRMS.

3.4.1.2 Analog Output

The g20 has a differential speaker output and an alert output:

• Speaker output: When headset mode is used, the headset speaker should be connected to the SPKR_N signal of the g20.

When a differential amplifier is used, both lines should be connected. An 8-ohm speaker can be connected directly to the
speaker lines.

• Alert: The g20 supports a direct connection for an alert transducer, in order to build a handset from the g20. All the sounds

that are transmitted to the alert can be routed to the speaker using the appropriate AT command.

26 98-08901C66-G

Table 6 shows the SPKR_N output in headset mode for different network signal levels when the g20 is set to the maximum
volume level and the headset interrupt is pulled low.

Table 6. Headset Speaker Output at Maximum Volume Level

Headset

dBm0 mV RMS

3.14 1111.9 174

0 774.6 165

-5 435.6 132

-10 244.9 72

-15.5 130 39

-16 122.8 36

-17 109.4 32

-20 77.5 24

-25 43.6 5

Speaker

(mV RMS)

-30 24.5 4

max

3000 210

The measurements shown in Table 6 apply in the following configuration:

g20

68 ohm10uf

SPKR_N

Headset

Figure 16. Headset Speaker Output Measurement Configuration

The series resistor value must be at least twice the impedance of the connected headset speaker.

Note

98-08901C66-G 27

Table 7 shows the output of the SPKR_N signal for different network signal levels when the g20 is set at the maximum volume
level and the headset interrupt is not pulled low.

Table 7. SPKR_N Output in Speaker Mode at Maximum Volume Level

dBm0 mV RMS

3.14 1111.9 374

0 774.6 267

-5 435.6 148

-10 244.9 83

-15.5 130 45

-16 122.8 42

-17 109.4 37

-20 77.5 26

-25 43.6 14

-30 24.5 7

max 2600 900

SPKR_N

(mV RMS)

Table 8 shows the SPKR_N output at different volume levels, when a 500mV RMS signal is transmitted from the network.

Table 8. SPKR_N Output when a 500mV RMS Signal is Transmitted

Handset Volume

0 (lowest gain) 16

122

231

343

461

587

6120

7 (highest gain) 170

SPKR_N

(mV RMS)

28 98-08901C66-G

Table 9 shows the typical keypad tone levels generated by the g20. These measurements taken with the g20 in handset mode
(meaning the headset-detect signal is not pulled low).

Table 9. SPKR_N Output when g20 is in Handset Mode

Handset Volume

00

1122

2172

3244

4342

5482

6678

7954

SPKR_N

(mV RMS)

Table 10 shows the keypad tone levels generated by the g20 when in headset mode (meaning the headset-detect signal is pulled
low).

Table 10. Headset Speaker Output

Headset

Headset Volume

Speaker

(mV RMS)

00

14

25.5

37.5

4 10.5

514

6 19.5

7 27.5

The above measurements apply to the configuration shown in Figure 16.

Note

98-08901C66-G 29

Table 11 shows the levels of the alert transducer measured on the ALERT_P signal at different ring volumes.

Table 11. Alert Transducer Levels for the ALERT_P Signal

Handset Volume

087

1124

2175

3250

4350

5487

6680

7980

ALRT_P

(mV RMS)

3.4.1.3 Audio Circuit Design Considerations

In order to design an audio circuit that produces clear audio, without being affected by the GSM transmission, the following
guidelines should be considered when designing the circuit:

• The audio input to the g20 should be referenced to the MIC_GND line of the g20.

• The microphone bias of the g20 for both the microphone and headset is 2.2 V. If a microphone with a different voltage is

used, the bias should be as clean as possible, and referenced to MIC_GND. Because most GSM buzz (217Hz TDMA noise)
is generated from the microphone path, if a different bias is created, it should be filtered to supply DC only.

• The MIC_GND and GND are connected inside the g20 and should not be connected to the application board.

• Keep the lines of the microphone inputs as short as possible. To filter the lines from RF emission, 39pF capacitors can be

used.

• The g20 GND should be connected on all four pins, with two mounting screws to the application ground.

• If possible, the RF cable ground from the g20 should be connected to the GND of the g20.

• The digital lines of the application should never be referenced to the MIC_GND.

3.4.2 Digital Audio Interface

The g20 digital audio interface is a full-duplex SAP (serial audio port) comprised of four signals:

• PCM_FS: This pin is used for frame sync output provided by the g20.

• PCM_CLK: This pin is used for the clock output provided by the g20.

• PCM_DIN: This pin is the serial input to the g20 SAP.

• PCM_DOUT: This pin is the serial output of the g20 SAP.

30 98-08901C66-G

The following conditions apply to the digital audio interface of the g20:

• The g20 SAP works in network mode, with four slots in each frame. Each slot consists of 16-bit data.

• The g20 sends and receives data on the first slot only.

• The frame sync rate is 8 KHz, and the clock rate is 512 KHz.

• The g20 is the master in the SAP network. Therefore, the connected DSP should be configured as a slave.

• Digital audio lines should be connected to Codex or DSP on the application side.

3.5 ANTENNA

The g20 has two models, one for North America Frequency bands (850/1900 MHz), and one for European Bands
(900/1800 MHz). The following connection requirements apply for the g20 antenna:

• The g20 is terminated with an MMCX connector, and with 50-ohm impedance in the relevant frequencies.

• The g20 can be connected to any antenna with 50-ohm impedance in the relevant frequency bands.

• The g20 is designed to work on VSWR, up to 2:5:1 The antenna should meet this requirement.

3.5.1 Antenna Performance Recommendations

Table 12 lists the performance recommendations for the g20 antenna.

Table 12. Antenna Performance Recommendations

Frequencies:

GSM 850

GSM 900

DCS 1800

PCS 1900

Gain: 0 dBi (unity) gain or greater
Impedance: 50 Ohm
VSWR: Typical: 1.5:1

TX 824 – 849 MHz

RX 869 – 893 MHz

TX 880 – 915 MHz

RX 925 – 960 MHz

TX 1710 – 1785 MHz

RX 1805 – 1880 MHz

TX 1850 - 1910 MHz

RX 1930 – 1990 MHz

Worst case: 2.5:1

3.6 ESD PROTECTION

In general, the g20 does not include embedded ESD protection circuits. This type of protection should be implemented in the
customer application. Partial ESD protection is provided, as follows:

• SIM lines are protected up to 3 KV with 6.8 V Zener Diodes.

• VCC input is protected with a 2.2 uF capacitor.

• Ignition input is protected with a 100 nF capacitor.

98-08901C66-G 31

4. CONNECTOR PIN ASSIGNMENTS

4.1 CONNECTORS

The g20 has two connectors: the g20 interface connector and the g20 RF connector. Each is described below.

g20 Model Number g20 70 Pin Connector Mating Connector Stacking Height

F3003 - F3004 Molex 53748-0708 Molex 52991-0708 3.0 mm

g20 RF Connector Mating Connector

Standard MMCX female, Amphenol

MMCX6251S5-3GT30G-50, gold plated

Standard MMCX male (connector for cable)

98-08901C66-G 33

4.2 PIN ASSIGNMENTS

The g20 interface is provided via a 70-pin connector.

g20 signals not used by the customer application must be left unconnected.

Do not apply external voltage on any of the g20 logic signals when the g20 is powered off.

Note

Table 13 describes the pin assignments for the g20 interface connector.

The RESET_N output signal (pin 25) is tri-state when the g20 is powered off. It is recommended to place a 10K
pull-down resistor on this signal in the customer application to ensure proper logic-level transitions.

Table 13. g20 Interface Connector Pin Assignments

Ω

Pin

#

Power:

1 GND Ground GND

2 GND Ground GND

3 GND Ground GND

4 GND Ground GND

5VCC

6VCC

7VCC

8VCC

Signal

Name

Description I/O Signal

Power
supply

Power
supply

Power
supply

Power
supply

IDC 3.03.64.2 V

IDC 3.03.64.2 V

IDC 3.03.64.2 V

IDC 3.03.64.2 V

Level

Min Typ Max Units

Inter-

nal

PU/PD

Active

H/L

GPIO:

16

26

25 RESET_N

WAKEUP
_IN_N

WAKEUP
_OUT_N

Wakeup
input

Wakeup
output

Reset signal
output

22K

I Logic 2.775 V

O Logic 2.775 V

O Logic 2.775 V L

PU

69K

PD

Ω

Ω

L

L

34 98-08901C66-G

Table 13. g20 Interface Connector Pin Assignments (Continued)

Pin

#

53

51 IGN Ignition input I Logic 2.775 3.6 16 V

39 TX_EN_N

41 ANT_DET

49

37 N.C.

UART:

Signal

Name

ON_OFF
_N

GPRS_
DET_N

Description I/O Signal

Min Typ Max Units

On/off switch I Logic 3.0 3.6 4.2 V

GSM
transmit
indicator

Antenna
Detection

GPRS
coverage
indicator

Not
connected

O Logic 2.775 V

O Logic 2.775 V

O Logic 2.775 V

Level

Inter-

nal

PU/PD

200K

PU

47K

Ω

PD

Ω

10K

PU

300K

PU

69K

Ω

PU

Active

H/L

Ω

Ω

L

H

L

H

L

21 TXD_N RS232 TXD I Logic 2.775 V

11 RXD_N RS232 RXD O Logic 2.775 V

9 RTS_N RS232 RTS I Logic 2.775 V

15 CTS_N RS232 CTS O Logic 2.775 V

19 DTR_N RS232 DTR I Logic 2.775 V

13 DSR_N RS232 DSR O Logic 2.775 V

17 DCD_N RS232 DCD O Logic 2.775 V

23 RI_N RS232 RI O Logic 2.775 V

69KΩ

PU

69KΩ

PU

69KΩ

PU

69KΩ

PU

69KΩ

PD

69KΩ

PU

69KΩ

PU

Ω

69K

PU

L

L

L

L

L

L

L

L

98-08901C66-G 35

Table 13. g20 Interface Connector Pin Assignments (Continued)

Pin

#

USB:

10

12 USB_D+ USB_D+ 3.3 V

14 USB_D- USB_D- 3.3 V

SPI:

70 SPI_CS

62

64 SPI_DIN

Signal

Name

USB_
VBUS

SPI_IRQ
_N

Description I/O Signal

Min Typ Max Units

USB- VCC I DC 5 V

SPI chip­select

SPI interrupt I Logic 2.775 V

SPI MISO
input

O Logic 2.775 V

I Logic 2.775 V

Level

Inter-

nal

PU/PD

Ω

69K

PU

Ω

69K

PD

Ω

69K

PU

Active

H/L

H

L

H

68

66 SPI_CLK SPI clock O Logic 2.775 V H

SIM Card:

50

48 SIM_VCC SIM VCC O DC 1.8 3 V

44

52 SIM_DIO

46 SIM_CLK SIM clock O Logic 1.8 3 V

PCM Audio:

SPI_
DOUT

SIM_PD
_N

SIM_RST
_N

SPI MOSI
output

SIM­presence
detect

SIM reset O Logic 1.8 3 V

SIM serial
data

O Logic 2.775 V H

I Logic 2.775 V

I/O Logic 1.8 3 V

69K

PU

69K

PD

22K

PU

69K

PD

Ω

Ω

Ω

Ω

L

L

H

H

18 PCM_DIN

Digital audio
receive

I Logic 2.775 V

69KΩ

PD

H

36 98-08901C66-G

Table 13. g20 Interface Connector Pin Assignments (Continued)

Pin

#

20

22

24 PCM_FS

Display:

54 LCD_CS

60 LCD_RS

56

Signal

Name

PCM_
DOUT

PCM_
CLK

LCD_
DATA

Description I/O Signal

Digital audio
transmit

Digital audio
clock

Digital audio
frame sync

Display chip­select

Display
register­select

Display
serial data

O Logic 2.775 V

O Logic 2.775 V

O Logic 2.775 V

O Logic 2.775 V H

O Logic 2.775 V H

O Logic 2.775 V H

Level

Min Typ Max Units

Inter-

nal

PU/PD

Ω

69K

PU

69K

Ω

PD

69K

Ω

PD

Active

H/L

H

H

H

58 LCD_CLK

Keypad:

30 KBC0_N

28 KBC1_N

32 KBR0_N

34 KBR1_N

36 KBR2_N

38 KBR3_N

40 KBR4_N

Display
serial clock

Keypad
column 0

Keypad
column 1

Keypad
row 0

Keypad
row 1

Keypad
row 2

Keypad
row 3

Keypad
row 4

O Logic 2.775 V H

Ω

I Logic 2.775 V

I Logic 2.775 V

I Logic 2.775 V

I Logic 2.775 V

I Logic 2.775 V

I Logic 2.775 V

I Logic 2.775 V

22K

PU

Ω

22K

PU

Ω

22K

PU

Ω

22K

PU

Ω

22K

PU

Ω

22K

PU

22KΩ

PU

L

L

L

L

L

L

L

98-08901C66-G 37

Table 13. g20 Interface Connector Pin Assignments (Continued)

Pin

#

42 KBR5_N

Audio:

67 SPKR_N

69 SPKR_P Speaker O Audio Inverted SPKR_N V

63 ALRT_N

65 ALRT_P

61 MIC

Signal

Name

Description I/O Signal

Keypad
row 5

Speaker
inverted

Alert
speaker
inverted

Alert
speaker

Microphone
input

I Logic 2.775 V

OAudio

O Audio Inverted ALERT_P V

OAudio

IAudio

Min Typ Max Units

As described in section

As described in section

Level

3.4.1.2

3.4.1.2

Inter-

nal

PU/PD

22K

PU

V

V

Active

H/L

Ω

L

59 MIC_GND

57

55

Charger:

35

33

31

29

HDST_
MIC

HDST_
INT_N

CHRG_
DET_N

CHRG_
STATE

CHRG_
SW

CHRG_
DIS

Microphone
ground

Headset
microphone

Headset­detect
interrupt

Charger­presence
detect

Charger rate
indicator

Accessory
current
control

Charger
disable

GND

IAudio

I Logic 2.775 V

I Logic 2.775 V L

I Logic 2.775 V

O Logic 2.775 V

O Logic 2.775 V H

270K

PU

L

38 98-08901C66-G

Table 13. g20 Interface Connector Pin Assignments (Continued)

Pin

#

ADC:

45

47 THERM

Miscellaneous:

27 BL_SINK

43 VIB_OUT

Signal

Name

CHRG_
TYP

Description I/O Signal

Accessory­type detect

Temperature
measure­ment

Backlight
current sink

Vibrator
regulator

I ADC 0 2.775 V

I ADC 0 2.775 V

IDC 80100mA

ODC 1.3 V

Level

Min Typ Max Units

Inter-

nal

PU/PD

Ω

47K

PU

Active

H/L

98-08901C66-G 39

5. MECHANICAL DESCRIPTION

5.1 MECHANICAL DETAILS

This section describes the mechanical details for the g20:

Size: 45.2x24.4x6 mm

Mounting: Two 2.4 mmØ holes are provided that accommodate M2 screws or #1-64 UNC 2A machine screws. Torque to

2.6 lb*inch (3kg*cm). Refer to Figure 17 below for mounting requirements.

Motorola recommends using a split washer for vibrations.

Note

Top View - All Models

Bottom View - All Models

Side View - All Models

Side View for F3003-F3004 Models

Figure 17. Mechanical Mounting Requirements

98-08901C66-G 41

Side View for F3012 & F3013 Models

6. SERVICE SUPPORT

6.1 CUSTOMER ASSISTANCE

This section provides contact information for any possible queries that may arise, such as the following:

• Have questions?

• Having trouble getting the Developer Board set up?

• Technical questions?

• Configuration questions/problems?

• Technical operating problems?

• Need documentation?

The GSM/CDMA Data Module Customer Support Center is ready to assist you on integration issues.

A direct customer should use the following email address to contact customer assistance: [e-mail].

An indirect customer should send his requests to his distributor and not to Motorola help desk.

The support services provided by Motorola are subject to the agreement between the customer and Motorola and
may be at an additional charge to the customer. Motorola will inform the customer in advance of any such charge.

Note

Every new call/problem report should be directed to the help desk email address noted above. It is recommended to report each
individual issue in a separate email. The following information is required when reporting a problem:

• Customer name and address

• Customer contact information for this request, including:

•Name

• Telephone

• Fax number

• Mobile number

• Email address

• Product name (for example, g20)

• Software version of the unit (ATI8 command) or model number

• PCB version: This information is located on the PCB near the RF connector.

• Severity of the problem

• Problem description, including:

• Operator name

• Type of SIM card (for example, Test, Pre-paid, or 5v/3v/1.8v)

• Configuration of the setup (such as Developer Board, handset, host, connections, and so on)

• Detailed scenario from startup

• Log of all the commands and the responses, beginning from startup

98-08901C66-G 43

• Answers to the following questions:

• Was the same scenario tested on the Developer Board and the PC to reproduce the problem?

• How many units do you have, and how many of them have this problem?

• How often does the problem recur?

In addition to the information requested above, send the following AT commands and the HyperTerminal log with the
responses:

AT+CMEE=2 // To get textual error message

AT+CPIN? // To get SIM card status

AT+CREG? // To see if the TXVR is registered to the network

AT+CSQ // To get the signal strength (RX level)

AT+CGSN // To read the IMEI number of the unit

ATI3 // To get the software version of the TXVR

AT\S // To get the setting of basic AT commands

AT+CMER=0,0,1,1 // To get messages and indicators from the handset display to the DTE

6.1.1 Motorola Workflow

The help desk uses the following workflow when responding to new calls:

1. Each new call is registered in the help desk data base.

2. The help desk immediately notifies the customer with the help desk system record number for each issue.

3. A champion is assigned to be responsible for the new call, from arrival to closing.

4. During this time, the champion updates the help desk system with the progress of the resolution process.

5. The champion is the contact to the customer and the engineering team, and coordinates activities that are required to solve
the problem.

6.1.2 Service Centers

Motorola Electronics Taiwan PCS

11F, No, 296, Sec. 4, Jen-Ai Road

Taipei, 106, Taiwan, R.O.C

Motorola GmbH

Am Sophienhof 10

D-24941 Flensburg

Germany

44 98-08901C66-G

Motorola Communications ISRAEL Ltd.

Service Operation

Attention: Shukrun Ofer

3 Krementsky Street

Tel Aviv, Israel 67899

Telephone: [phone]

JNB Electronics Pty Ltd.

347 Settlement Road, Thomastown

VIC 3074

Australia

Field service should be coordinated with the Service Manager in Motorola using the following email address:
[e-mail]

6.1.3 Ordering Accessories

The following accessory items are available to aid the developer:

• Standard USB cable, A-type connector to B-type connector

• Standard RS232 cable, 9-pin male connected to the Developer Board

To place an order, contact your Motorola account manager. A list of Motorola account managers is available at
www.motorola.com/automotive/telematics/. Then, Click Products > Data Modules > Contact Us.

6.2 TESTING A STANDALONE UNIT

This section describes how to perform a functionality test on a g20 unit. The test is performed in order to:

• Introduce the user to the g20

• Explain how to work with the g20 unit

• Describe how to evaluate basic g20 features

The test setup provides a wide platform through which a g20 unit can be evaluated. The specific test procedure described below
covers only few of the g20’s many features. Using this setup, you can perform several additional tests on the g20.

The test is performed using two modems, one of which is the g20. The modems communicate with each other through a single
computer, which also controls their operation.

The test requires knowledge about the operation of the g20 Developer’s Kit, terminal applications and AT commands. Refer to
relevant documentation for assistance.

To perform the test, you need the following:

• A g20 OEM cellular engine unit

• A g20 Developer's Kit

• A desktop or laptop computer, which includes:

•· A free serial communications port (RS232)

•· A connected and active line modem (internal or external)

•· A terminal application (such as HyperTerminal)

98-08901C66-G 45

6.2.1 Test Setup

Follow the procedure below to set up your equipment before performing the test:

1. Verify that the computer you intend to use for the test is equipped with a working line modem.

2. Set up the g20 and the Developer Board as described in the Initial Setup section of the g20 Developer’s Kit document by
doing the following:

• Verify that the g20 has adequate reception from the local GSM network.

• Connect the Developer Board’s RS232 port to the computer’s serial port.

3. Open a terminal application window (such as HyperTerminal) in the computer and configure it to operate with the serial
port occupied by the g20.

4. Open a second terminal window and configure it to operate with the serial port occupied by the line modem.

*

Developer Board

with g20 unit

RS232

Port

To telephone line

wall outlet

Line Modem

(internal or external)

Serial

Port

Computer

Serial
Cable

Serial

Port

Figure 18. Test Setup

*You can use a second g20 unit instead of the line modem. When doing so, you must repeat the setup procedure for the additional g20.

6.2.2 Test Procedure

Follow the procedure below to perform the g20 test:

1. Verify that the g20 is functioning and communicating with the computer by performing the following AT commands in
the g20 terminal window:

• ati7: This prompts g20 identification. The g20 will reply "G20 OEM Module".

• ati8: This command prompts the g20 software version.

2. Verify that the line modem is functioning and communicating with the computer by entering the AT command "at" in the
modem’s terminal window. This common AT command prompts a properly working modem to reply "OK".

3. Make a CSD data call from the g20 to the line modem or vice versa using the "atdt" and "ata" commands in the appropriate
window.

4. Verify that a connection between the two modems is established.

5. Select any file to be transferred between the two modems. The file can be any existing file on the computer, or a new file
created specifically for the test.

6. Send the file through the terminal application, from the g20 or to it, using the terminal application’s send/receive file
options.

7. When the file transfer is completed, use the "ath" command in any of the terminal windows to terminate the call. This step
completes the test. You can now continue to perform additional tests using the same setup, or change the setup as required.

46 98-08901C66-G

7. INDEX

A

Abbreviations 7
Analog

Input 26

Output 26
Analog Audio Connectivity 15
Antenna Installation 12
Approvals

Regulatory 11
Audio Interfaces 26

Analog 26

B

Block Diagram Description 13

C

Communication Interfaces 21

RS232 22
Connections

Additional 16

SIM v, 24

SPI 25

USB 23
Connectivity

Analog Audio 15

DCE 20

Digital Audio 15

DTE 20

RS232 15
Connectors 33
Current Consumption 17

D

DCE Connectivity 20
DTE Connectivity 20

E

Environmental

Specifications 9

G

g20

Abbreviations 7
Analog Audio Interfaces 26
Analog Input 26
Analog Output 26
Antenna Detect 26
Antenna Installation 12
Audio Interfaces 26
Block Diagram 13
Block Diagram Description 13
Communication Interfaces 21
Connections 16
Connectivity 15
Connectors 33
Current Consumption 17
DCE/DTE Connectivity 20
GPRS Coverage Indication 25
Ignition Line 19
Interfaces 25
Models Description 11
On/Off Signal 19
Operation Overview 13
Pin Assignments 34
Power Supply 17
Product Specifications 9
Regulatory Approvals 11
RS232 15, 22
RS232 Connection 22
RS232 Levels 22
Safety Precautions 12
SIM 24
SIM Connection v, 24
Sleep Mode Options 19
SPI 25
SPI Connection 25
Standards 1

98-08901C66-G 47

Terms and Abbreviations 7

Testing 45

Trademarks 2

Transmit Enable 25

Turning the Unit On/Off 18

USB 23

USB Connection 23

User Operation 12

I

Ignition Line 19
Interfaces 25

Analog Audio 26

Audio 26

M

Models Description 11

O

Off

Turn the Unit 18
On

Turn the Unit 18
Operation Overview 13

Precautions 12
Product Specifications 9

R

Regulatory Approvals 11
RS232 15, 22

Analog Audio Connectivity 15
Connection 22
Digital Audio Connectivity 15
Levels 22

S

Safety Precautions 12
Signal

On/Off 19
SIM 24
Sleep Mode Options 19

General 19
Specifications 9

Environmental 9

Physical 9
SPI 25
Standards 1

T

P

Physical Specifications 9
Pin

Antenna Detect 26
GPRS Coverage Indication 25

Transmit Enable 25
Pin Assignments 34
Power Supply 17

Design 17

RF Filtering v, 17

Terms 7
Testing 45

Test Procedure 46

Test Setup 46
Trademarks 2
Turning the Unit On/Off 18

U

USB 23
User Operation 12

48 98-08901C66-G

MOTOROLA and the Stylized M Logo are registered in the US Patent & Trademark Office.
All other product or service names are the property of their respective owners.
©Copyright 2004 Motorola, Inc.
Java™ Technology and/or J2ME™ : Java and all other Java–based marks are trademarks or registered
trademarks of Sun Microsystems, Inc. in the U.S. and other countries.
UNIX® : UNIX is a registered trademark of The Open Group in the United States and other countries.

*98-08901C66-G*

98-08901C66-G