Motorola Mobility T56HQ1 Cellular/ PCS GSM Transceiver Module User Manual g20 Cell Engine Module Description

Download:
Mirror Download [FCC.gov]
Document ID	830233
Application ID	R0bicMNAs63lg9eh98MuWg==
Document Description	Exhibit 8 Users Manual
Short Term Confidential	No
Permanent Confidential	No
Supercede	No
Document Type	User Manual
Display Format	Adobe Acrobat PDF - pdf
Filesize	92.73kB (1159164 bits)
Date Submitted	2007-08-16 00:00:00
Date Available	2007-08-16 00:00:00
Creation Date	2007-05-20 07:51:48
Producing Software	Acrobat Distiller 6.0 (Windows)
Document Lastmod	2007-08-14 13:49:53
Document Title	g20 Cell Engine Module Description
Document Creator	FrameMaker 7.1
Document Author:	Motorola

APPLICANT: MOTOROLA, INC.
FCC ID: IHDT56HQ1
INSTRUCTION MANUAL
•
A preliminary draft copy of the User’s Manual follows this cover page.
•
The User’s Manual will have the following text added to it:
"NOTE: This equipment has been tested and found to comply with the limits for a Class B
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This equipment
generates, uses and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular installation. If
this equipment does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try to correct the
interference by one or more of the following measures:
. Reorient or relocate the receiving antenna.
. Increase the separation between the equipment and receiver.
. Connect the equipment into an outlet on a circuit different from that to which the receiver is
connected.
. Consult the dealer or an experienced radio/TV technician for help."
EXHIBIT 8
Technical
Information
M OTOROLA G24 D EVELOPER ’S G UIDE
M ODULE H ARDWARE D ESCRIPTION
ENGLISH
MAY 31, 2007
6889192V27-F
SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE
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.
Copyrights
This instruction manual, and the Motorola products described in this instruction manual may be, include or describe copyrighted
Motorola material, such as computer programs stored in semiconductor memories or other media. Laws in the United States and
other countries preserve for Motorola and its licensors certain exclusive rights for copyrighted material, including the exclusive
right to copy, reproduce in any form, distribute and make derivative works of the copyrighted material. Accordingly, any
copyrighted material of Motorola and its licensors contained herein or in the Motorola products described in this instruction
manual may not be copied, reproduced, distributed, merged or modified in any manner without the express written permission of
Motorola. Furthermore, the purchase of Motorola products shall not be deemed to grant either directly or by implication, estoppel,
or otherwise, any license under the copyrights, patents or patent applications of Motorola, as arises by operation of law in the sale
of a product.
Computer Software Copyrights
The Motorola and 3rd Party supplied Software (SW) products described in this instruction manual may include copyrighted
Motorola and other 3rd Party supplied computer programs stored in semiconductor memories or other media. Laws in the United
States and other countries preserve for Motorola and other 3rd Party supplied SW certain exclusive rights for copyrighted
computer programs, including the exclusive right to copy or reproduce in any form the copyrighted computer program.
Accordingly, any copyrighted Motorola or other 3rd Party supplied SW computer programs contained in the Motorola products
described in this instruction manual may not be copied (reverse engineered) or reproduced in any manner without the express
written permission of Motorola or the 3rd Party SW supplier. Furthermore, the purchase of Motorola products shall not be deemed
to grant either directly or by implication, estoppel, or otherwise, any license under the copyrights, patents or patent applications of
Motorola or other 3rd Party supplied SW, except for the normal non-exclusive, royalty free license to use that arises by operation
of law in the sale of a product.
VENDOR COPYRIGHT
Apache Software Foundation Copyright 2004-2005 All Rights Reserved
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 2007 Motorola, Inc.
REV052604
Table of Contents
Manual Scope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ix
Target Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ix
Manual Organization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ix
Applicable Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .ix
Regulatory Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Regulatory Statement (Safety). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Antenna and Transmission Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xi
Contact Us . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
Text Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
Field Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
General Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xiii
Caring for the Environment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xiv
Limitation of Liability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
Warranty Notification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xv
How to Get Warranty Service? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvi
Claiming . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xvi
Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
What is Not Covered by the Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xvii
Installed Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
Out of Warranty Repairs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xviii
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .xix
Chapter 1:
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Regulatory Approvals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CFR 47 Part 15.19 specifies label requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CFR 47 Part 15.21 Information to user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
CFR 47 Part 15.105 Information to the user . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Chapter 2:
Hardware Interface Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Architecture Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Digital Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Analog Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
GSM Transceiver Block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Supply. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Supply Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Consumption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Power On/Off Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Turning the G24 On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Power Supply Turn-on . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Turning the G24 On Using ON_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Turning the G24 On Using IGN. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
May 31, 2007
Module Hardware Description
Table of Contents
Turning the G24 Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Turning the G24 Off Using ON_N . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Turning the G24 Off Using IGN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Power Loss shut down . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Turning the G24 Off Using AT+MRST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Low Power Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Activating Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Serial Interface During Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Terminating Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Temporary Termination of Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Permanent termination of Low Power Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Real Time Clock . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Serial Interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Primary UART (UART1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Secondary UART (UART2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
USB Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
SIM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SIM Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
SIM Design Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Audio Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Handset Microphone Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Headset Microphone Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Speaker Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Headset Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Alert Loudspeaker Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Digital Audio Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Voiceband Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Stereo Audio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Basic Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Advanced Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Audio Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Audio Algorithms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Gain Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Audio Design . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Analog Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
A/D Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Power Supply A/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Temperature A/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
General Purpose A/D . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Controls and Indicators Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
VREF Reference Regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
OFF Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Standby Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Active Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Wakeup Out . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Antenna Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
GPRS/EGPRS Detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Transmission Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
General Purpose I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Antenna Interface. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
ii
Module Hardware Description
May 31, 2007
Table of Contents
Chapter 3:
Electrical and Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Environmental Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Application Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Chapter 4:
Mechanical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Board Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Interface Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Mating Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
RF Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Mating Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
G24 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Chapter 5:
Service and Testing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Who to Contact? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Required Query Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Service Centers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Testing a Standalone Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Acronyms and Abbreviations
Index
May 31, 2007
Module Hardware Description
iii
List of Figures
Figure No.
Figure Title
Page No.
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
2-12
2-13
2-14
2-15
2-16
2-17
2-18
2-19
2-20
2-21
2-22
2-23
2-24
2-25
2-26
2-27
2-28
2-29
G24 Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Transmission Power Drops. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Power Supply Turn-on and Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
ON_N Power On Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
IGN Power On Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
ON_N Power Off Timing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
IGN Power Off Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
ATS24 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
CTS Signal During Sleep Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
WKUPI_N Signal Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Serial Interface Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
UART1 Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
UART2 Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
USB Interface Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
G24 SIM Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Audio Interface Topology. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Handset Microphone Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Headset Microphone Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Differential Speaker Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Single-ended Speaker Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Differential Loudspeaker Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
SIngle-ended Loudspeaker Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Voiceband Mode PCM Bus Coding Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Stereo Mode PCM Bus Coding Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Audio Programming Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Temperature A/D Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
VREF Power-up Timing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
WKUPO_N Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
TXEN_N Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4-1
4-2
4-3
4-4
4-5
G24 Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
G24 Interface Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mating Connectors Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
MMCX Connector Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional MMCX Cable Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5-1
Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
May 31, 2007
Module Hardware Description
61
62
63
64
65
List of Tables
Table No.
Table Title
Page No.
1-1
Product Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2-1
2-2
2-3
2-4
2-5
2-6
2-7
2-8
2-9
2-10
2-11
2-12
2-13
2-14
2-15
2-16
2-17
2-18
2-19
2-20
2-21
2-22
2-23
2-24
3-1
3-2
3-3
G24 Operating Modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Power Supply Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Recommended Power Supply Filtering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
G24 Current Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
SIM Interface Signals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Handset Microphone Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Headset Microphone Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Speaker Port Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Alert Port Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Digital Audio modes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Basic Mode Audio Paths . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Advanced Mode Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Speech Processing Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Gain Control Features. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Speaker Port Gains for Speech . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Microphone and Headset Microphone Port Gains . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
A/D Signals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Supply A/D Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Temperature Conversion Values . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Temperature A/D Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
GPAD Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Controls and Indicators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
VREF Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Antenna Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Environmental Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Interface Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4-1
4-2
4-3
G24 interface connector options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Interface Connector Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
RF Connector Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
May 31, 2007
Module Hardware Description
vii
Preface
Manual Scope
This manual provides the electrical, mechanical and environmental requirements for properly
integrating the G24 module in a host application.
This manual gives a complete set of hardware features and functions that may be provided by
G24. The availability of any feature or function, which is described in this manual, depends on
the hardware revision and software version of a specific G24 model.
The parameters and values provided in this manual are defined under typical conditions. These
values may vary when subject to different conditions, such as SW version, network status,
application settings and environmental conditions.
Target Audience
This manual is intended for all members of the integration team who are responsible for
integrating the G24 module into the host OEM device, including representatives from hardware,
software and RF engineering disciplines.
Manual Organization
This manual contains the following chapters:
• Chapter 1 —introduces the G24 unit and provides important safety instructions.
• Chapter 2 —provides a detailed hardware description of the blocks and components
comprising the G24.
• Chapter 3 —describes the pin assignments for G24 connectors.
• Chapter 4 —describes G24 mechanical specifications and requirements.
• Chapter 5 —provides contact information for Motorola Service Support and Customer
Assistance.
Applicable Documents
• G24 Developer's Kit - 6889192V26
• G24 AT Commands - 6889192V28
May 31, 2007
Module Hardware Description
ix
Regulatory Requirements
Regulatory Requirements
The Federal Communications Commission (FCC) 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 G24 modem is not a standalone transceiver but is an
integrated module, the G24 cannot be tested by itself for EME certification. It is, however, the
integrator’s responsibility to have the completed device tested for EME certification.
Regulatory Statement (Safety)
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 G24 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.
• The G24 must be operated at the voltages described in the technical documentation
• The G24 must not be mechanically nor electrically changed. Use of connectors should
follow the guidance of the technical documentation
• The G24 is designed to meet the EMC requirements of ETS 300342
• When integrating the G24 into a system, Motorola recommends testing the system to
ETS300342-1
• The G24 meets the safety requirements of EN60950
• Systems using the G24 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 G24 module
Antenna and Transmission Safety Precautions
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 and must not be co-located or
operate in conjunction with any other antenna or transmitter 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 requirements described in the following
section, “Antenna Installation” , must be met.
Module Hardware Description
May 31, 2007
Preface
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 +6.8 dBi (850 band). The
combined cable loss and antenna gain must not exceed +2.2 dBi and total system output must
not exceed 2.0W EIRP in the PCS (1900) band in order to comply with the EIRP limit of
24.232 (b). OEM installers must be provided with antenna installation instruction and
transmitter operating conditions for satisfying RF exposure compliance.
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.
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 80112-5704 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.
May 31, 2007
Module Hardware Description
xi
Contact Us
Contact Us
We at Motorola want to make this guide as helpful as possible. Keep us informed of your
comments and suggestions for improvements.
For general contact, technical support, report documentation errors and to order manuals, use this
email address:
M2M.CustomerCare@motorola.com
Motorola appreciates feedback from the users of our information.
Text Conventions
The following special paragraphs are used in this guide to point out information that must be read.
This information may be set-off from the surrounding text, but is always preceded by a bold title
in capital letters:
Note
Note: Presents additional, helpful, noncritical information that you can use.
Warning
Warning:
Presents information to warn you of a potentially hazardous situation in which there
is a possibility of personal injury.
Important
Important:
Presents information to help you avoid an undesirable situation
or provides additional information to help you understand a topic or concept.
Caution
Caution:
xii
Presents information to identify a situation in which damage to software, stored
data, or equipment could occur, thus avoiding
the damage.
Module Hardware Description
May 31, 2007
Preface
Field Service
For Field Service requests, use this email address:
n2csfs01@motorola.com
General Safety
Remember!. . . safety depends on you!
The following general safety precautions must be observed during all phases of operation,
service, and repair of the equipment described in this manual. Failure to comply with these
precautions or with specific warnings elsewhere in this manual violates safety standards of
design, manufacture, and intended use of the equipment. Motorola, Inc. assumes no liability for
the customer’s failure to comply with these requirements. The safety precautions listed below
represent warnings of certain dangers of which we are aware. You, as the user of this product,
should follow these warnings and all other safety precautions necessary for the safe operation of
the equipment in your operating environment.
Ground the instrument
To minimize shock hazard, the equipment chassis and enclosure must be connected to an
electrical ground. If the equipment is supplied with a three-conductor AC power cable, the power
cable must be either plugged into an approved three-contact electrical outlet or used with a
three-contact to two-contact adapter. The three-contact to two-contact adapter must have the
grounding wire (green) firmly connected to an electrical ground (safety ground) at the power
outlet. The power jack and mating plug of the power cable must meet International
Electrotechnical Commission (IEC) safety standards.
Note: Refer to “Grounding Guideline for Cellular Radio Installations”–Motorola part no.
68P081150E62.
Do not operate in an explosive atmosphere
Do not operate the equipment in the presence of flammable gases or fumes. Operation of any
electrical equipment in such an environment constitutes a definite safety hazard.
Do not service or adjust alone
Do not attempt internal service or adjustment unless another person, capable of rendering first aid
is present.
Keep away from live circuits
Operating personnel must:
• not remove equipment covers. Only Factory Authorized Service Personnel or other qualified
maintenance personnel may remove equipment covers for internal subassembly, or
component replacement, or any internal adjustment
May 31, 2007
Module Hardware Description
xiii
Caring for the Environment
• not replace components with power cable connected. Under certain conditions, dangerous
voltages may exist even with the power cable removed
• always disconnect power and discharge circuits before touching them
Do not substitute parts or modify equipment
Because of the danger of introducing additional hazards, do not install substitute parts or perform
any unauthorized modification of equipment. Contact Motorola Warranty and Repair for service
and repair to ensure that safety features are maintained.
Dangerous procedure warnings
Warnings, such as the example below, precede potentially dangerous procedures throughout this
manual. Instructions contained in the warnings must be followed. You should also employ all
other safety precautions that you deem necessary for the operation of the equipment in your
operating environment.
Warning example:
Warning:
Dangerous voltages, capable of causing death, are present in this equipment. Use
extreme caution when handling, testing,
and adjusting.
Caring for the Environment
The following information is provided to enable regulatory compliance with the European Union
(EU) Directive 2002/96/EC Waste Electrical and Electronic Equipment (WEEE) when using
Motorola equipment in EU countries.
Disposal of Motorola equipment in EU countries
Please do not dispose of Motorola equipment in landfill sites.
In the EU, Motorola in conjunction with a recycling partner will ensure that equipment is
collected and recycled according to the requirements of EU environmental law.
Please contact the Customer Network Resolution Center (CNRC) for assistance. The 24 hour
telephone numbers are listed at
http://mynetworksupport.motorola.com
Select Customer Network Resolution Center contact information.
Alternatively if you do not have access to CNRC or the internet, contact the Local Motorola
Office.
xiv
Module Hardware Description
May 31, 2007
Preface
Disposal of Motorola equipment in non-EU countries
In non-EU countries, dispose of Motorola equipment in accordance with national and regional
regulations.
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.
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.
Warranty Notification
Motorola guarantees to you, the original purchaser, the OEM module and accessories which you
have purchased from an authorized 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 Authorized
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
May 31, 2007
Module Hardware Description
xv
How to Get Warranty Service?
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 OEM module 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.
How to Get Warranty Service?
In most cases the authorized Motorola dealer which sold and/or installed your Motorola OEM
module and original accessories will honor 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 service centers, listed in
Chapter 5.
Claiming
In order to claim the warranty service you must return the OEM module and/or accessories in
question to Motorola's Authorized 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 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
Authorized 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 Authorized Service Centers only, therefore it is
important to keep a record of any previous repairs, and make them available if questions arise
concerning maintenance.
xvi
Module Hardware Description
May 31, 2007
Preface
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
OEM module 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 honor 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 OEM module, 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.
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 unauthorized 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,
unauthorized 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.
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.
May 31, 2007
Module Hardware Description
xvii
Installed Data
9. All plastic surfaces and all other externally exposed parts that are scratched or damaged due
to customer normal use.
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
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, 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.
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 authorized third party to carry out such repairs.
xviii
Module Hardware Description
May 31, 2007
Preface
Revision History
Manual Number
6889192V27-F
Manual Title
Module Hardware Description
Version Information
The following table lists the manual version, date of version, and remarks about
the version.
Revision History
Version
May 31, 2007
Date Issue
Remarks
January 1, 2006
Initial Release
April 1, 2006
Minor updates to Preface and Chapter 2
June 29, 2006
Removal of model numbers from the manual.
Additional/updated regulatory issues.
Reminder to EGPRS capabilities.
September 1, 2006
Updates to Chapter 2 - Hardware Interface Description, in
the following paragraphs: RTC Mode, Power Consumption, Turning the G24 On, Power Supply Turn-on, Low
Power Mode, Data on the Serial Interface, A/D Interface,
Controls and Indicators Interface.
January 31, 2007
Minor updated to Product Specifications table and to
Audio section in chapter 2.
May 31, 2007
Minor changes to Chapter 5 Service and Testing.
Module Hardware Description
xix
Chapter 1: Introduction
The G24 is the newest member of Motorola's embedded cellular modules family.
Designed with quad band GSM capabilities, which supports all four GSM bands 850/900/1800/1900 MHz, and with GPRS/EGPRS multislot class 10, G24 can operate on any
GSM/GPRS/EGPRS network to provide voice and data communications.
The G24 is similar to a condensed cellular phone core, which can be integrated into any system or
product that needs to transfer voice or data information over a cellular network. Thus, it
significantly enhances the system's capabilities, transforming it from a standalone, isolated
product to a powerful high-performance system with global communications capabilities.
The G24 is designed as a complete GSM communications solution with all the controls,
interfaces and features to support a broad range of applications:
• A powerful audio interface
• A large set of indicators and control signals
• Several advanced power-saving modes
• A variety of serial communications solutions.
All these features and interfaces are easily controlled and configured using a versatile AT
command interface that provides full control over the G24 operation.
The G24 control and indication interface extends its capabilities beyond GSM communications.
This includes an A/D and GPIO interface, and a regulated output voltage for supplying external
circuits. With these interfaces, the G24 can operate and control external applications and receive
feedback from external environment and circuits.
The G24 interface design, using a single 70 pin board-to-board connector, through which all
application interfaces are managed, facilitates fast and easy integration. It significantly shortens
the development process, and minimizes the product's time to market.
The G24 is extremely compact in size with a slim mechanical design, which makes it space
saving on the application board and easily fitted into any board design.
The advanced power supply management significantly reduces power consumption to a
necessary minimum and prolongs battery life.
May 31, 2007
Module Hardware Description
Product Specifications
Product Specifications
Important:
For safety regulations and requirements, see “Regulatory Requirements” on page x,
“Regulatory Statement (Safety)” on page x and “Antenna and Transmission Safety
Precautions” on page x in “Preface” .
Note: Motorola reserves the right to change the specifications without prior notice.
Table 1-1: Product Specifications
Product Features
Operating systems:
GSM 850/GSM 900
DCS 1800/PCS 1900
Physical Characteristics
Size (with 3 mm connector):
45.2 x 24.4 x 6.5 mm
Size (with 2.5 mm
connector):
45.2 x 24.4 x 6.0 mm
Mounting:
Two Ø2.4 mm holes
Weight:
10.1 grams
Module Hardware Description
May 31, 2007
Table 1-1: Product Specifications (Cont.)
Environmental
Operational temperature:
-20°C to +60°C
Storage temperature:
-40°C to +85°C
Performance
Operating voltage:
3.3 - 4.2 V
Current consumption:
2.5 mA @ DRX9 (Sleep mode)
Maximum Tx output power:
GSM 850/GSM 900: Power class 4 (33 + 2 dBm)
DCS 1800/PCS 1900: Power class 1 (30 + 2 dBm)
Interfaces
Connectors:
Single 70-pin, board-to-board
RF MMCX
SIM Card:
External SIM connectivity
3.0 V
Serial Ports:
UART:
BR from 300 bps to 460800 bps
Auto BR from 300 bps to 57600 bps
USB:
USB full-speed device specifications, Rev. 2.0
Data Features
GPRS:
Multi-slot class 10 (4 Rx/2 Tx/5 Sum)
Max Downlink BR 85.6 kbps
Coding scheme CS1-CS4
Class B GSM 07.10 multiplexing protocol
EGPRS (model depended)
Multi-slot class 10
Data rates of 270 kSps
Coding scheme CS5-CS9
Class E-2
CSD:
Max BR 14.4 kbps
SMS:
MO/MT Text and PDU modes
Cell broadcast
FAX Class 1
Voice Features
Telephony
Digital audio
Differential analog audio lines
Vocoders
EFR/HR/FR/AMR
DTMF support
Audio control:
May 31, 2007
Echo suppression, noise suppression, side tone and gain
control
Module Hardware Description
Product Specifications
Table 1-1: Product Specifications (Cont.)
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
ASCII
GSM
8859-1
Control/Status Indicators
GSM/GPRS/EGPRS
coverage
Wakeup
TX enable
Reset
Antenna Detect
Features over RS232
Embedded TCP/IP stack
AT Command Set
GSM 07.05
GSM 07.07
Motorola proprietary AT commands
Accessories
Firmware data loader
Data logger
Developer Kit
Module Hardware Description
May 31, 2007
Regulatory Approvals
The G24 module has been tested and approved under the standards and regulations listed below:
• FCC
•
•
•
•
•
•
•
DOC
R&TTE
PTCRB
IC
CTIA
FTA
EMC
Important:
The following paragraphs must be addressed by the integrator to ensure their host is
in compliance to the G24 FCC grant and/or the FCC grant of the host device.
CFR 47 Part 15.19 specifies label requirements
The following text may be on the product, user's manual, or container.
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1) this device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
CFR 47 Part 15.21 Information to user
The user's manual or instruction manual for an intentional or unintentional radiator shall caution
the user that changes or modifications not expressly approved by the party responsible for
compliance could void the user's authority to operate the equipment. In cases where the manual is
provided only in a form other than paper, such as on a computer disk or over the Internet, the
information required by this section may be included in the manual in that alternative form,
provided the user can reasonably be expected to have the capability to access information in that
form.
CFR 47 Part 15.105 Information to the user
(b) For a Class B digital device or peripheral, the instructions furnished the user shall include the
following or similar statement, placed in a prominent location in the text of the manual:
Note: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed and
used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
May 31, 2007
Module Hardware Description
Regulatory Approvals
measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
The following paragraphs describe in details the hardware requirements for properly interfacing
and operating the G24 module.
Architecture Overview
Figure 2-1 below illustrates the primary functional components of the G24.
Figure 2-1: G24 Block Diagram
May 31, 2007
Module Hardware Description
Architecture Overview
The G24 consists of the following blocks:
Digital Block
• Micro-controller Unit (MCU) for system and user code execution.
• Digital Signal Processor (DSP) for voice and data processing.
• Serial communications interfaces.
• USB driver interface
• UART1
• UART2
• SPI - logger
• SIM card
• Digital audio (PCM) bus interface.
• General purpose IO signals.
Analog Block
• Power Management IC (PMIC).
• Internal regulators
• 1 external regulator for customer use
• Analog audio interface management.
• Speaker, microphone
• Alert speaker
• Headset
• General purpose and dedicated A/D signals.
• A/D
• Voltage sensor
• Temperature sensor
• Real Time Clock (RTC) subsystem.
GSM Transceiver Block
• RF power amplifier.
• 3 gain stages for the low GSM band and high GSM band
• 850/900/1800/1900 MHz
• RF receiver, which includes LNAs, Mixers, VCOs, I/Q outputs and buffers.
• Signal processing IC for transmit and receive GSM data processing.
• FEM - Front End Module.
• Includes a harmonic filter and antenna switch
• Filter - Quad-band SAW filter that selects the required receive band.
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Operating Modes
G24 incorporates several operating modes. Each operating mode is different in the active features
and interfaces.
Table 2-1 summarizes the general characteristics of the G24 operating modes and provides
general guidelines for operation.
Table 2-1: G24 Operating Modes
Mode
Description
Features
Not Powered
VCC supply is disconnected.
The G24 is Off.
Any signals connected to the interface connector must be set low or tri-state.
RTC Mode
Valid VCC supply.
RESET_N signal is enabled (low).
The G24 Interfaces are Off. Only the internal
RTC timer is operating. Any signals
connected to the interface connector must be
set low or tri-stated.
Idle Mode
RESET_N signal is disabled (high).
CTS_N and DSR_N signals are enabled
(low).
The G24 is fully active, registered to the
GSM network and ready to communicate.
This is the default power-up mode.
Sleep Mode
RESET_N signal is high.
CTS_N signal is disabled.
The G24 is in low power mode.
The application interfaces are disabled, but,
G24 continues to monitor the GSM network.
CSD call or
GPRS/EGPRS
data
RESET_N signal is high.
TXEN_N signal is toggling.
A GSM voice or data call is in progress.When
the call terminates, G24 returns to the last
operating state (Idle or Sleep).
May 31, 2007
Module Hardware Description
Power Supply
Power Supply
The G24 power supply must be a single external DC voltage source of 3.3V to 4.2V. The power
supply must be able to sustain the voltage level during a GSM transmit burst current surge, which
may reach 2.0A.
The G24 interface connector has 8 contacts for the main power supply, as described in Table 2-2.
All these contacts must be used for proper operation.
Table 2-2: Power Supply Signals
Pin #
Signal Name
Description
1-4
GND
Main ground connection for G24
module.
5-8
VCC
DC supply input for G24 module.
VIN = 3.3 V to 4.2 V
IRMS = 550 mA during multislot
transmission
IMAX = 2 A during transmit bursts
Power Supply Design
Special care must be taken when designing the power supply of the G24. The single external DC
power source indirectly supplies all the digital and analog interfaces, but also directly supplies the
RF power amplifier (PA). Therefore, any degradation in the power supply performance, due to
losses, noises or transients, will directly affect the G24 performance.
The burst-mode operation of the GSM transmission and reception, draws instantaneous current
surges from the power supply, which causes temporary voltage drops of the power supply level.
The transmission bursts consume the most instantaneous current, and therefore cause the largest
voltage drop. If the voltage drops are not minimized, the frequent voltage fluctuations may
degrade the G24 performance.
Figure 2-2 illustrates the power supply behavior during GSM transmission.
Figure 2-2: Transmission Power Drops
10
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
It is recommended that the voltage drops during a transmit burst will not exceed 300mV,
measured on the G24 interface connector. In any case, the G24 supply input must not drop below
the minimum operating level during a transmit burst. Dropping below the minimum operating
level may result in a low voltage detection, which will initiate an automatic power-off.
To minimize the losses and transients on the power supply lines, it is recommended to follow
these guidelines:
• Use a 1000 uF, or greater, low ESR capacitor on the G24 supply inputs. The capacitor should
be located as near to the G24 interface connector as possible.
• Use low impedance power source, cabling and board routing.
• Use cabling and routing as short as possible.
• Filter the G24 supply lines using filtering capacitors, as described in Table 2-3.
Table 2-3: Recommended Power Supply Filtering
Capacitor
Usage
Description
1000 uF
GSM Transmit current
serge
Minimizes power supply
losses during transmit
bursts.
Use maximum possible
value.
10 nF, 100 nF
Digital switching noise Filters digital logic noises
from clocks and data sources.
8.2 pF, 10 pF
1800/1900 MHz GSM
bands
Filters transmission EMI.
33 pF, 39 pF
850/900 MHz GSM
bands
Filters transmission EMI.
Power Consumption
Table 2-4 specifies typical G24 current consumption ratings in various operating modes. The
current ratings refer to the overall G24 current consumption over the VCC supply.
Table 2-4: G24 Current Ratings
Parameter
Description
Conditions
Min
Typ
Max
Unit
85
µA
IOFF
RTC mode
75
IIDLE
Idle mode
18
mA
ISLEEP
Low power mode
3.25
2.70
2.45
mA
May 31, 2007
DRx
Module Hardware Description
11
Power Supply
Table 2-4: G24 Current Ratings (Cont.)
Parameter
Description
Conditions
GSM850 PCL
IGSM-RMS
IGPRS-RMS
IEGPRS-RMS
12
Average current
GSM voice 1 TX slot
1 Rx slot
Average current
GPRS Class 10 2 TX slot
3 Rx slot
Average current
EGPRS Class 10 2 TX slot
3 Rx slot
Min
Typ
10
15
19
305
165
120
110
EGSM900 PCL 5
10
15
19
305
165
120
110
DCS1800 PCL
10
15
225
150
115
107
PCS1900 PCL
10
15
225
150
115
107
GSM850 PCL
10
15
19
540
275
170
145
EGSM900 PCL 5
10
15
19
540
275
170
145
DCS1800 PCL
10
15
345
200
150
140
PCS1900 PCL
10
15
345
200
150
140
GSM850 PCL
14
19
339
185
144
EGSM900 PCL 8
14
19
328
185
148
DCS1800 PCL
15
260
167
151
PCS1900 PCL
15
260
169
151
Module Hardware Description
Max
Unit
mA
mA
mA
May 31, 2007
Chapter 2: Hardware Interface Description
Table 2-4: G24 Current Ratings (Cont.)
Parameter
IGSM-MAX
IEGPRS-MAX
May 31, 2007
Description
Peak current
During TX slot
Peak current
EGPRS Class 102 TX slot
3 RX slot
Conditions
Min
Typ
GSM850 PCL
10
15
19
2000
850
430
330
GSM900 PCL
10
15
19
2000
850
430
330
GSM1800 PCL
10
15
1350
615
380
330
GSM1900 PCL
10
15
1350
615
380
330
GSM850 PCL
14
19
1780
635
353
GSM900 PCL
14
19
1680
635
353
GSM1800 PCL
15
1200
489
367
GSM1900 PCL
15
1200
489
367
Module Hardware Description
Max
Unit
mA
mA
13
Power On/Off Operation
Power On/Off Operation
The G24 power on and off process includes two primary phases, which are indicated at the
interface connector by the hardware output signals RESET_N and CTS_N.
The RESET_N signal indicates whether G24 is powered on or off.
When this signal is enabled (low), G24 is powered-off. When it is disabled (high), G24 is
powered-on.
The CTS_N signal indicates the serial communications interface (UART) status. When this signal
is high, the G24 serial interface is disabled. When it is low, the serial interface is enabled, and
G24 is ready to communicate.
These same conditions apply to the CTS2_N signal with regards to the second serial interface
(UART2).
Important:
Do not operate the G24 out of its electrical or environmental limits. Refer to the
specifications chapter for details of these limits.
Turning the G24 On
When the G24 power supply is stable above the minimum operating level and G24 is powered
off, only the internal RTC timer is active.
When G24 is turned on, by any of the methods described below, it will first perform an automatic
internal system-test, during which basic functions are verified. The system-test duration is
typically 1600 milliseconds. When the system-test has completed G24 resumes normal operation.
During the internal system-test process G24 may toggle several interface signals, which are
visible to the application. These signals do not represent any valid state or data, and should be
ignored by the customer application until the system-test has completed.
Power Supply Turn-on
When connecting the power supply for the first time, or when reconnecting it after a power
supply loss, G24 will power-on. The G24 is turned-on automatically when external power is
applied above the minimum operating level.
The G24 will power-off automatically, in case it is not powered-on by the ON_N or IGN signals,
after the internal system-test period (typically 1600ms) is completed.
If the ON_N or IGN signals are asserted during that period, G24 will respond accordingly and
continue to power-up normally.
The ON_N and IGN signals will be active and responding only after the power supply to the G24
is stable above the minimum operating level. Therefore, the ON_N and IGN signals must not be
used for at least 100 milliseconds after applying power to G24.
14
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Figure 2-3 illustrates the G24 power on and off upon application of a power supply, during which
the ON_N or IGN signals are not asserted.
Figure 2-3: Power Supply Turn-on and Off
Turning the G24 On Using ON_N
The ON_N input signal is set high by an internal pull-up resistor whenever a power supply is
applied to G24. Therefore, it is recommended to operate this signal using an open collector/drain
circuit connection.
Asserting the ON_N signal low for a minimum of 500 milliseconds (0.5 seconds) and a maximum
of 1.5 seconds will cause the G24 to turn-on.
Asserting the ON_N signal low for more than 1.5 seconds may cause the G24 to interpret the
signal as a power-off command, and turn off immediately after turning on.
Figure 2-4 illustrates the power-on process using the ON_N signal.
Figure 2-4: ON_N Power On Timing
May 31, 2007
Module Hardware Description
15
Power On/Off Operation
Turning the G24 On Using IGN
The IGN input signal must be set low when not used. To turn on G24, this signal must be asserted
high. The IGN signal must remain high for the duration of the G24 operation. G24 powers down
when the IGN signal is returned to its low state.
Important:
It is recommended to place a pull-down resistor in the customer application, on the
IGN signal. A 100 kohm resistor, or less, is acceptable.
Figure 2-5 illustrates the power-on process using the IGN signal.
Figure 2-5: IGN Power On Timing
Turning the G24 Off
There are several ways to turn the G24 off:
• Asserting the ON_N signal low for a minimum of 2 seconds.
• Setting the IGN signal low.
• Low power automatic shut down.
• AT command.
Turning the G24 Off Using ON_N
The ON_N signal is set high using an internal pull up resistor when power is applied to G24.
Asserting the ON_N signal low for a minimum of 2 seconds will turn G24 off. This will initiate a
normal power-off process, which includes disabling of all applications interfaces (UART, SIM
card, audio, etc.) and closing the network connection.
16
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Figure 2-6 illustrates the power-off timings when using the ON_N signal.
Figure 2-6: ON_N Power Off Timing
Turning the G24 Off Using IGN
The IGN signal may be used to power off G24 only if it was also used to power it on. When the
IGN signal is set low, G24 will turn off. This will initiate a normal power-off process, which
includes disabling of all applications interfaces (UART, SIM card, audio, etc.) and closing the
network connection.
The IGN signal will not power off G24 before 30 seconds have elapsed since G24 was
powered-on. This delay mechanism is implemented to protect G24 from unexpected transients on
the IGN line during power up, particularly when applying vehicle cranking waveforms.
Figure 2-7 illustrates the power-off timings when using the IGN signal.
Figure 2-7: IGN Power Off Timing
May 31, 2007
Module Hardware Description
17
Power On/Off Operation
Power Loss shut down
A low power shut down occurs when G24 senses the external power supply is below the minimal
operating limit. The module will respond by powering down automatically without notice.
This form of power-down is not recommended for regular use since the unexpected power loss
may result in loss of data.
Turning the G24 Off Using AT+MRST
The AT+MRST command initiates a G24 system reset operation, which powers off the G24. This
command emulates the ON_N signal operation for power off.
18
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Low Power Mode
The G24 incorporates an optional low power mode, called Sleep Mode, in which it operates in
minimum functionality, and therefore draws significantly less current. During low power mode
the G24 network connection is not lost. G24 continues to monitor the GSM network constantly
for any incoming calls or data.
During low power mode, all of the G24 interface signals are inactive and are kept in their
previous state, prior to activating low power mode. To save power, all the G24 internal clocks and
circuits are shut down, and therefore serial communications is limited.
Activating Low Power Mode
By default, the G24 powers on in Idle mode. In this mode the G24 interfaces and features are
functional and the module is fully active.
Low power mode is activated by the ATS24 command. The value set by this command
determines the inactive state duration required by G24, in seconds, after which G24 will enter
sleep mode.
For example:
ATS24 = 1 activates low power mode after 1 second of inactivity.
ATS24 = 5 activates low power mode after 5 seconds of inactivity.
ATS24 = 0 disables low power mode (default).
Figure 2-8 illustrates the ATS24 command operation.
Figure 2-8: ATS24 Operation
Important:
May 31, 2007
G24 will not enter low power mode in any case when there is data present on the
serial interface or incoming from the GSM network or an internal system task is
running. Only when processing of any external or internal system task has
completed, and G24 is inactive for the duration of ATS24, it will enter low power
mode.
Module Hardware Description
19
Low Power Mode
Important:
G24 will not enter low power mode when USB is operating. Connecting USB to the
G24 will disable the low power mode operation.
Serial Interface During Low Power Mode
During low power mode the G24 serial interfaces are disabled. This is indicated by the CTS
signal high state.
The G24 wakes up periodically from low power mode to page the GSM network for any
incoming calls or data. After this short paging is completed, G24 returns to low power mode.
During this short awake period, the serial interfaces are enabled and communications with the
module is possible.
The CTS_N signal is alternately enabled and disabled synchronously with the network paging
cycle. CTS_N is enabled whenever G24 awakes to page the network. This indicates the G24
serial interfaces are active (see Figure 2-9).
Figure 2-9: CTS Signal During Sleep Mode
The periodical enabling and disabling of the CTS_N signal during low power mode can be
controlled by the AT+MSCTS command.
Setting AT+MSCTS=1 permanently disables the serial interface during low power mode, even
during a network page by G24. The CTS_N signal is disabled, and therefore the serial interfaces
are blocked.
Terminating Low Power Mode
Terminating the low power mode, or wake-up, is defined as the transition of the G24 operating
state from Sleep mode to Idle mode. There are several ways to wake-up G24 from low power
mode as described below.
Important:
20
During power saving mode the G24 internal clocks and circuits are disabled, in
order to minimize power consumption. When terminating the power saving mode,
and switching to Idle mode, G24 requires a minimal delay time to reactivate and
stabilize its internal circuits before it can respond to application data.
This delay is typically of 5 milliseconds, and is also indicated by the CTS_N signal
inactive (high) state. The delay guarantees that data on the serial interface is not lost
or misinterpreted.
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Temporary Termination of Low Power Mode
Temporary termination of low power mode occurs when G24 switches from Sleep mode to Idle
mode for a defined period, and then returns automatically to Sleep mode.
Low power mode may be terminated temporarily by several sources, some of which are user
initiated and others are initiated by the system.
Using the WKUPI_N signal
The WKUPI_N signal is an active low input, that is set high by default. By asserting this signal
low the application can wake-up G24 from low power mode and switch to Idle mode.
G24 will remain in Idle mode, awake and fully active, as long as WKUPI_N signal remains low.
When this signal is disabled and set high again, G24 will return to Sleep mode automatically,
according to the ATS24 settings (see Figure 2-10).
Figure 2-10: WKUPI_N Signal Operation
The WKUPI_N signal is the recommended method to temporarily wake-up G24 from low power
mode. It provides the application full control of the G24 operating mode and guarantees that data
on the serial interface will not be lost or misinterpreted.
The WKUPI_N signal must be used to wake up G24 from low power mode if the serial interface
has been disabled by the AT+MSCTS command.
Incoming Network Data
During low power mode, G24 continues monitoring the GSM network for any incoming data,
message or voice calls.
When G24 receives an indication from the network that an incoming voice call, message or data
is available, it automatically wakes up from low power mode to alert the application. When G24
has completed to process all the tasks related to the incoming data, it will automatically return to
low power mode according to the ATS24 settings.
Depending on the type of network indication and the application settings, G24 may operate in
several methods, which are configurable by AT commands, to alert the application of the
incoming data:
• Enable the WKUPO_N signal to wake-up the application from low power.
• Send data to the application over the serial interface.
• Enable the serial interface's Ring Indicator (RI_N) signal.
May 31, 2007
Module Hardware Description
21
Low Power Mode
Data on the Serial interface
While G24 is temporarily awake in Idle mode, data may be transmitted on the serial interface. In
case data is being transmitted in any direction, G24 will not return to low power mode. This is
regardless of the original wake-up reason or source. G24 will remain awake while data is
transferred.
Only when the serial interface transfer is completed and the data has been processed, G24 will
return to low power mode automatically, according to the ATS24 settings (see Figure 2-11).
Figure 2-11: Serial Interface Data
Permanent termination of Low Power Mode
The G24 low power mode is enabled and disabled by the ATS24 command.
To permanently terminate the G24 low power mode, the ATS24 = 0 command must be used.
Setting ATS24 = 0 disables the currently active low power mode and switches G24 to Idle mode.
G24 will not return to low power mode until an ATS24 > 0 commands is set again.
This command can be sent only when the serial interface is active.
In case the serial interface is disabled, it must first be activated before sending this command. To
reactivate the serial interface, a temporary termination of the low power mode is required, as
described in “Temporary Termination of Low Power Mode” on page 21.
Following the temporary low power mode termination, the serial interface will activate and the
ATS24 = 0 command can be received by G24.
22
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Real Time Clock
G24 incorporates a Real Time Clock (RTC) mechanism that performs many internal functions,
one of which is keeping time. The RTC subsystem is embedded in the PMIC and operates in all of
the G24 operating modes (Off, Idle, Sleep), as long as power is supplied above the minimum
operating level.
The G24 time and date can be set using the following methods:
• Automatically retrieved from the GSM network.
In case G24 is operated in a GSM network that supports automatic time zone updating, it will
update the RTC with the local time and date upon connection to the network. The RTC will
continue to keep the time from that point.
• Using the AT+CCLK command.
Setting the time and date manually by this AT commands overrides the automatic network
update.
Once the time and date are manually updated, the RTC timer will keep the time and date
synchronized regardless of the G24 operating state.
When the power supply is disconnected from G24, the RTC timer will reset and the current time
and date will be lost. On the next G24 power-up the time and date will need to be set again
automatically or manually.
May 31, 2007
Module Hardware Description
23
Serial Interfaces
Serial Interfaces
G24 includes three completely independent serial communications interfaces, which may be used
by the application for several purposes.
Primary UART (UART1)
The G24 primary UART is a standard 8-signal bus. The primary UART is used for all the
communications with G24 - AT commands interface, GPRS/EGPRS data and CSD data,
programming and software upgrades.
The UART signals are active low CMOS level signals. For standard RS232 communications with
a PC, an external transceiver is required.
G24 is defined as a DCE device, and the user application is defined as the DTE device. These
definitions apply for the UART signals naming conventions, and the direction of data flow, as
described in Figure 2-12.
Figure 2-12: UART1 Interface Signals
The G24 primary UART supports baud rates 300, 600, 1200, 2400, 4800, 9600, 19200, 38400,
57600, 115200, 230400 and 460800 bps.
Auto baud rate detection is supported for baud rates up to 57600 bps.
All flow control handshakes are supported: hardware, software, or none.
Parity bit and Stop bit definitions are also supported.
The UART default port configuration is 8 data bits, 1 stop bit and no parity, with hardware flow
control and auto baud rate detect enabled.
Important:
24
The G24 UART will not send data over the serial interface in case the DTR_N
and/or RTS_N input signals are disabled (set high). Therefore, regardless of the
handshake method, it is still required to enable these signals for proper operation, by
asserting them low.
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Secondary UART (UART2)
The secondary UART is a 4-signal interface, which only provides data and flow control signals.
The secondary UART is designed, but not limited, to enhance the G24 capabilities by providing
connectivity to external devices or applications that require serial communications, such as GPS
receivers or Bluetooth wireless devices.
The secondary UART may also be used for standard serial communications, like the primary
UART.
The UART signals are active low CMOS level signals. For standard RS232 communications with
a PC, an external transceiver is required.
G24 is defined as a DCE device, and the user application is defined as the DTE device. These
definitions apply for the UART signals naming conventions, and the direction of data flow, as
described in Figure 2-13.
Figure 2-13: UART2 Interface Signals
USB Interface
G24 incorporates a standard Universal Serial Bus (USB) interface.
The G24 USB electrical interface and protocol conform to the USB 2.0 full-speed specifications.
G24 is defined as a USB device on the USB bus and does not support hub or host functionality.
USB may be used for standard communications with G24, as done through the UART interface.
Important:
When USB is active, G24's low power mode cannot be operated.
The USB interface signals are shown in Figure 2-14.
Figure 2-14: USB Interface Signals
May 31, 2007
Module Hardware Description
25
SIM Interface
SIM Interface
The G24 incorporates a SIM interface, which conforms to the GSM 11.11 and GSM 11.12
standards, that are based on the ISO/IEC 7816 standard. These standards define the electrical,
signaling and protocol specifications of a GSM SIM card.
G24 does not incorporate an on-board SIM card tray for SIM placement. The SIM must be
located on the user application board, external to the G24. The G24 SIM interface includes all the
necessary signals, which are routed to the interface connector, for a direct and complete
connection to an external SIM.
G24 supports dynamic detection of the SIM card, through a dedicated SIM detection signal. G24
will detect a SIM card insertion or removal upon power up or during operation by the transitions
on the SIM_PD_N signal.
SIM Connection
Figure 2-15 illustrates a typical SIM interface connection to G24. This connection type is
implemented on the G24 Developer Board, using an FCI SIM tray, PN 7111S1615A05.
Figure 2-15: G24 SIM Interface
Table 2-5 details the SIM interface signals.
Table 2-5: SIM Interface Signals
Pin #
26
Signal Name
Description
48
SIM_VCC
2.85V Supply to the SIM
44
SIM_RST_N
Active low SIM reset signal
52
SIM_DIO
Serial input and output data
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Table 2-5: SIM Interface Signals (Cont.)
Pin #
Signal Name
Description
46
SIM_CLK
Serial 3.25 MHz clock
50
SIM_PD_N
Active low SIM card presence
detection
SIM Design Guidelines
The SIM interface and signals design is extremely important for proper operation of G24 and the
SIM card. There are several design guidelines that must be followed to achieve a robust and
stable design that meets the required standards and regulations.
• Using the SIM detection signal, SIM_PD_N, is mandatory in case the SIM card is accessible
to the user and may be removed during G24 operation. To avoid any damage to the SIM or
G24, the SIM interface signals must be deactivated before the SIM card contacts are
mechanically removed from the SIM tray contacts. Therefore, the SIM_PD_N detection
signal must be disabled before the SIM is removed from its tray.
• The SIM should be located, and its signals should be routed, away from any possible EMI
sources, such as the RF antenna and digital switching signals.
• The SIM interface signals length should not exceed 100 mm between the G24 interface
connector and the SIM tray. This is to meet with EMC regulations and improve signal
integrity.
• To avoid crosstalk between the SIM clock and data signals (SIM_CLK and SIM_DIO), it is
recommended to rout them separately on the application board, and preferably isolated by a
surrounding ground plane.
• The SIM card signals should be protected from ESD using very low capacitance protective
elements (zener diodes, etc.).
• The G24 interface does not support SIM programming through the VPP signal. This signal
should not be connected to G24.
May 31, 2007
Module Hardware Description
27
Audio Interface
Audio Interface
The G24 audio interface supports several audio devices and operating modes.
The audio interface's operating modes, active devices, amplification levels and speech processing
algorithms are fully controlled by the host application, through advanced programming options
and a versatile AT commands set.
The G24 supports the following audio devices:
• Two single-ended and biased mono analog microphone inputs for use in a variety of modes.
• Two differential mono analog speaker outputs for use in a variety of modes.
• A digital serial interface using PCM coding.
Figure 2-16 shows the audio interface topology.
Figure 2-16: Audio Interface Topology
Handset Microphone Port
The handset microphone port is the G24 power-up default active audio input for voice calls. It is
located on pin 61 at the G24 interface connector, named MIC.
It is designed as a single-ended input and should be referenced to the G24 analog ground.
The microphone input includes all the necessary circuitry to support a direct connection to an
external microphone device. It incorporates an internal bias voltage of 2.1V through a 2.2kΩ
resistor, and has an impedance of 1kΩ.
28
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Figure 2-17 shows the microphone circuit and Table 2-6 gives the microphone specifications.
Figure 2-17: Handset Microphone Circuit
Important:
The microphone circuit design depends on the type of microphone device.
A series capacitor is required in case a passive microphone is used, or the
application provides a separate bias voltage to an active microphone circuit.The
internal G24 biasing circuit may also be used with an active microphone, which
corresponds to the microphone port specifications.
Table 2-6: Handset Microphone Port Specifications
Parameter
Conditions
Input Voltage
No load
AT+MMICG=0
Gain
Programmable in
1 dB steps
Min
AC Input
Impedance
Bias voltage
Typ
Max
Unit
2.0
VPP
31
dB
RBIAS = 2.2 kΩ
IBIAS = 1 mA
Bias Current
2.1
kΩ
2.2
mA
Headset Microphone Port
The headset microphone port is designed for use with, but not limited to, a headset audio device.
It is located at pin 57 on the G24 interface connector, named HDST_MIC.
It is designed as a single-ended input and should be referenced to the G24 analog ground.
The microphone input includes all the necessary circuitry to support a direct connection to a
headset microphone device. It incorporates an internal bias voltage of 2.1V through a 2.2kÙ
resistor, and has an impedance of 1kΩ.
May 31, 2007
Module Hardware Description
29
Audio Interface
Figure 2-18 shows the microphone circuit and Table 2-7 gives the microphone specifications.
Figure 2-18: Headset Microphone Circuit
Important:
The headset microphone circuit design depends on the type of microphone device.
A series capacitor is required in case a passive microphone is used, or the
application provides a separate bias voltage to an active microphone circuit.
The internal G24 biasing circuit may also be used with an active microphone, which
corresponds to the headset microphone port specifications.
Table 2-7: Headset Microphone Port Specifications
Parameter
Conditions
Input Voltage
No load
AT+MMICG=0
Gain
Programmable in
1 dB steps
Min
AC Input
Impedance
Bias voltage
Max
Unit
2.0
VPP
31
dB
RBIAS = 2.2 kΩ
IBIAS = 1 mA
Bias Current
Ext Mic AC
Input
Impedance
Typ
@1.02 kHz
2.1
kΩ
2.2
mA
28
kΩ
Speaker Port
The analog speaker port is the G24 power-up default active output for voice calls and DTMF
tones. It is located at pins 67 and 69 on the G24 interface connector, named SPKR_N and
SPKR_P respectively.
30
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
It is designed as a differential output with 32Ω impedance, but may also be used as a single-ended
output referenced to the G24 analog ground.
The speaker output is used for both the handset and the headset audio paths.
Figure 2-19 shows a differential speaker circuit, Figure 2-20 shows a single-ended speaker circuit
and Table 2-8 gives the speaker specifications.
Figure 2-19: Differential Speaker Circuit
Important:
For safety regulations it is important to place series resistors on the speaker output
lines, as illustrated in Figure 2-19. The resistors value should be R = 0Ω at the
design stage, but may be changed to a different value during audio safety testing, in
case speaker level limitation is required.
Figure 2-20: Single-ended Speaker Circuit
May 31, 2007
Module Hardware Description
31
Audio Interface
Important:
When implementing a single ended speaker design, it is required to place a series
capacitor and resistor on the speaker output line, as illustrated in Figure 2-20.
The capacitor should be of low tolerance with values of C = 10-22 uF.
The resistor value depends on the speaker application:
- For a handset device, the resistor value should be R = 0Ω at the design stage, but
may be changed to a different value during audio safety testing, in case speaker
level limitation is required.
- For a headset device, safety regulations require the resistors value to be R > 2RLΩ,
where RL is the speaker impedance (e.g. 32Ω).
For example, when using a 32Ω speaker the series resistance would be R > 64Ω.
Table 2-8: Speaker Port Specifications
Parameter
Conditions
Output
Voltage
No load
Single ended
Gain
Programmable in
3 dB steps
Min
Typ
Max
Unit
2.5
VPP
21
dB
AC Output
Impedance
32
Ω
DC Voltage
1.38
THD
32 Ω load
200 Hz - 20 kHz
Isolation
Speech, f> 4 kHz
0.1
60
dB
Headset Detection
The G24 operates by default in the basic audio mode with the handset audio path, for DTMF
tones and speech, and the alert loudspeaker device, for rings and alert tones, active.
The headset path is an alternate audio path in basic mode. It is designed for, but not limited to, a
personal hands-free audio device, a headset, using the headset microphone input device and the
speaker output device. When this path is selected, the alert loudspeaker is disabled, and all the
audio sounds are passed through to the headset path.
The HDST_INT_N signal is used to switch between handset and headset audio paths in basic
audio mode. This signal is set high by default at power up. Asserting the HDST_INT_N signal
low enables the headset audio path and disables the handset and alert paths. Setting this signal
high will disable the headset path and enable the handset and alert audio paths.
The G24 supports dynamic switching between the handset and headset audio paths, during
operation and call handling.
Important:
32
The HDST_INT_N signal does not operate in advanced audio mode. This signal's
functionality is overridden by the AT+MAPATH command settings.
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Alert Loudspeaker Port
The alert loudspeaker is the default G24 power-up ringer. It is used for, but not limited to,
sounding the G24 alerts, melodies, and rings. It is located at pins 63 and 65 on the G24 interface
connector, named ALRT_N and ALRT_P respectively.
It is designed with an internal amplifier supplied directly from VCC, which supplies 0.5W to the
audio device. It may also be used as a single-ended output referenced to the G24 analog ground.
Figure 2-21 shows the alert loudspeaker circuit and Table 2-9 gives the loudspeaker
specifications.
Figure 2-21: Differential Loudspeaker Circuit
Important:
For safety regulations it is important to place series resistors on the alert output
lines, as illustrated in Figure 2-21. The resistors value should be R = 0Ω at the
design stage, but may be changed to a different value during audio safety testing, in
case that alert level limitation is required.
Figure 2-22: SIngle-ended Loudspeaker Circuit
May 31, 2007
Module Hardware Description
33
Audio Interface
Important:
When implementing a single ended loudspeaker design, it is required to place a
series capacitor and resistor on the alert output line, as illustrated in Figure 2-22.
The capacitor should be of low tolerance with values of C = 10-22 uF.
The resistor value should be R = 0Ω at the design stage, but may be changed to a
different value during audio safety testing, in case that alert level limitation is
required.
Table 2-9: Alert Port Specifications
Parameter
Conditions
Output Voltage
No load
Single ended
Gain
Programmable in
3 dB steps
Min
Typ
Max
Unit
3.5
VPP
21
dB
AC Output
Impedance
Ω
DC Voltage
VCC/
THD
8 Ω load
200 Hz - 20 kHz
Isolation
0.1
60
dB
Digital Audio Interface
The G24 digital audio interface is a serial Pulse Code Modulation (PCM) bus, which uses linear
2's compliment coding. G24 is the PCM bus master, supplying the clock and sync signals to the
application.
The G24 digital interface is a 4 signal PCM bus, which includes a bit clock output signal for the
bus timing, a frame sync output signal for audio sampling timing, and serial data input and output
signals.
Important:
34
The PCM bus signals are shared internally by the analog audio interface and the
digital audio interface. Therefore, when using the analog audio interface the PCM
bus signals must be tri-stated or disconnected at the interface connector.
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
The digital audio interface supports 4 types of audio data formats, which define the PCM bus
configuration and data rates:
• Voice band audio - Intended for speech during voice calls and for mono rings and alerts.
• Stereo audio - Includes 3 audio formats that support high quality stereo ring tones and alerts.
The PCM bus configuration is defined by the audio data format that is sounded through the digital
audio path, as described in Table 2-10.
Table 2-10: Digital Audio modes
Frame Sync
Sampling
Audio Mode
Bit Clock
AT+CRTT Tones
Voice
8 kHz
520 kHz
Mono tones
8 kHz
520 kHz
6 - 9 (7 default)
Stereo low tones
20.05 kHz
705 kHz
12 - 38, 40 - 46
Stereo mid tones
32 kHz
1024 kHz
48 - 49
Stereo high tones
44.1 kHz
1.4 MHz
10, 11, 39, 47
Voiceband Audio
This digital voice audio format is used for speech during voice calls and for mono rings and
alerts.
The PCM bus signal's configuration for voiceband audio is:
• PCM_CLK - 520 kHz serial clock
• PCM_FS - 8 kHz bit-wide frame-sync
• PCM_DOUT - 13-bit linear audio data output
• PCM_DIN - 13-bit linear audio data input
The analog audio is sampled at an 8 kHz rate and converted to linear 13-bit serial PCM audio
data. The serial data is transferred on the PCM bus in 16-bit word format, which includes 13
sampled data bits, and 3 added zero value bits.
The 16-bit serial data is transferred in both directions after each sync signal's falling edge. The
sync signal pulse duration is one clock period, after which the serial data is transferred in both
directions for 16 consecutive clock periods.
Following the 16-bit data transfer, the serial input and output data signals inactivate until the next
sync pulse, which occurs every 125 µS (8 kHz). It is recommended the serial data signals will be
High-Z during the inactive period.
Important:
May 31, 2007
In digital audio mode the input and output gains cannot be controlled by AT
commands.
Module Hardware Description
35
Audio Interface
Figure 2-23 illustrates the PCM bus format of the voiceband audio configuration.
Figure 2-23: Voiceband Mode PCM Bus Coding Format
Stereo Audio
The digital stereo audio format is used for sounding stereo ring tones and alerts. It incorporates 3
modes of operation that support the different audio sampling rates, which are provided by G24 as
ring tone melodies. The available ring tones may be selected by the AT+CRTT command.
The PCM bus signal's configuration for stereo ring tones and alerts is:
• PCM_CLK - 705 kHz - 1.4 MHz serial clock
• PCM_FS - 22.05 kHz - 44.1 kHz word-wide frame-sync
• PCM_DOUT - 16-bit linear audio data output
• PCM_DIN - Disabled
Figure 2-24 illustrates the PCM bus format of the stereo audio configurations.
Figure 2-24: Stereo Mode PCM Bus Coding Format
Operating Modes
The G24 audio interface includes 2 modes of operation. Each operating mode defines the audio
input and output devices to be used for each audio sound type and their programmable settings.
Basic Mode
Basic audio mode is the G24 default power-up audio configuration. Several audio paths are
available in this mode, and their settings can be programmed through the AT command set.
36
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Table 2-11 describes the available audio paths in Basic mode.
Table 2-11: Basic Mode Audio Paths
Audio Path
Input Signal
Output Signal
Description
Handset
MIC
SPKR_N, SPKR_P
Default audio path for speech and
DTMF tones.
Headset
HDST_MIC
SPKR_N, SPKR_P
Alternate path for headset device.
Enable by setting HDST_INT_N
interface signal low.
ALRT_N, ALRT_P
Default alert and ringer loudspeaker
output device.
PCM_DOUT
Enable digital path by
AT+MADIGITAL=1
Alert
Digital
PCM_DIN
Advanced Mode
Advanced audio mode utilizes G24's unique set of AT commands for advanced audio
programming. The expanded AT command set enables to define a specific audio path and setting,
which are not part of the default configuration, for each type of audio sound (speech, DTMF
tones, rings and alerts).
Unlike basic audio mode, which provides predefined audio paths, the advanced audio mode
provides full control over the G24 audio interface and its parameters, and differentiates between
each type of audio sound.
Table 2-12 describes the advanced mode audio programming features. These features are only a
part of the complete advanced audio AT command set.
Table 2-12: Advanced Mode Commands
Command
May 31, 2007
Description
AT+MAPATH
Sets the input device for voice, and the output
devices for voice, DTMF tones, rings and
alerts.
AT+MAFEAT
Enables and disables the speech processing
algorithms - Echo suppression, noise suppression and sidetone.
AT+MAVOL
Sets the gain (amplification) level of the
selected analog output device.
AT+MMICG
Sets the gain (amplification) level of the
selected analog input device.
AT+MADIGITAL
Switches between analog and digital audio
paths.
Module Hardware Description
37
Audio Interface
Audio Programming Interface
The G24 incorporates a unique audio programming interface, through AT commands, which
controls the following audio features:
• Audio Path - Defines the input and output devices for speech, DTMF tones, rings and alerts.
• Audio Gain - Defines the amplification (gain) level for input and output audio devices.
• Audio Algorithm - Defines the speech processing features for voice calls.
Figure 2-25 describes the audio programming interface options, which are defined by AT
commands.
Figure 2-25: Audio Programming Interface
Audio Algorithms
The G24 audio interface features advanced speech processing algorithms for echo suppression,
noise suppression and side-tone feedback
Enabling or disabling the algorithms can be configured separately for each audio path and
operating mode through the AT command interface.
The G24 also supports full rate (FR), half rate (HR), enhanced full rate (EFR) and adaptive
multi-rate (AMR) speech coding algorithms, which are used by the GSM network. These
algorithms are configured and operated by the GSM network provider.
38
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Table 2-13 gives the speech processing features.
Table 2-13: Speech Processing Features
Feature
Default
Setting
AT Command
Basic
Advanced
Echo Suppression
Noise Suppression
Sidetone
Description
ATS96
AT+MAFEAT
Disabled
Controls the echo and noise suppression.
ATS94
AT+MAFEAT
Enabled
Controls the sidetone.
Gain Control
The amplification (gain) level for each input and output device can be configured through AT
commands. Both basic and advanced audio modes provide AT commands to set the desired gain
levels for each audio path and audio sound type.
Table 2-14 gives the gain control features.
Table 2-14: Gain Control Features
Device
Default
Gain
Gain Command
Basic
Advanced
AT+MMICG
AT+MMICG
Microphone
Headset Microphone
Speaker
Alert Speaker
AT+CLVL
AT+MAVOL
AT+CRSL
Description
Sets input speech gain level.
Sets input speech gain level.
Sets voice and DTMF gain.
Sets rings and alerts gain.
Gain levels for the input and output devices, which correspond to the values set by the AT
commands, are described in Table 2-15 and Table 2-16.
Table 2-15: Speaker Port Gains for Speech
May 31, 2007
AT Command
Value
0dBm0 Gain
Level (dB)
0dBm0 Output
Level (mVRMS)
-36
12
-33
17.5
-30
25
-27
34.5
Module Hardware Description
39
Audio Interface
Table 2-15: Speaker Port Gains for Speech (Cont.)
AT Command
Value
0dBm0 Gain
Level (dB)
0dBm0 Output
Level (mVRMS)
-24
50
-21
70
-18
100
-15
140
Table 2-16: Microphone and Headset Microphone Port Gains
AT Command
Value
0dBm0 Input
Level
(mVRMS)
Maximum Input
Level (mVRMS)
87
350
...
...
...
63
250
...
...
...
16
15
55
...
...
...
31
11
Audio Design
The audio quality delivered by G24 is highly affected by the application audio design,
particularly when using the analog audio interface. Therefore, special care must be taken when
designing the G24 audio interface. Improper design and implementation of the audio interface
will result in poor audio quality.
Poor audio quality is a result of electrical interferences, or noises, from circuits surrounding the
audio interface. There are several possible sources for the audio noise:
• Transients and losses on the power supply
• EMI from antenna radiations
• Digital logic switching noise
Most of the audio noise originates from the GSM transmit burst current surges (217 Hz TDMA
buzz), which appear on the main power supply lines and antenna, but also indirectly penetrate the
internal application's supplies and signals. The noises are transferred into the G24's audio circuits
through the microphone input signals and then are amplified by the G24's internal audio
amplifiers.
To minimize the audio noise and improve the audio performance the microphone and speaker
signals must be designed with sufficient protection from surrounding noises.
40
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
The following guidelines should be followed to achieve best audio performance:
• Reference the microphone input circuits to the G24 AGND interface signal.
• If using single-ended audio outputs, they should be referenced to the G24 AGND interface
•
•
•
•
•
signal.
Keep the audio circuits away from the antenna.
Use RF filtering capacitors on the audio signals, as described in Table 2-3.
The audio signals should not be routed adjacent to digital signals.
Isolate the audio signals by a surrounding ground plane or shields.
Filter internal supplies and signals that may indirectly affect the audio circuits, from noises
and voltage drops.
Analog Ground
The G24 interface incorporates a dedicated analog ground contact, AGND pin 59, which is
internally connected to the G24's ground. The AGND signal is intended to provide a separate
ground connection for the application's external audio devices and circuits.
This signal provides an isolated ground connection directly from G24, which is separated from
the noisy digital ground of the application. It is recommended to connect this signal to analog
audio devices and circuits used by the application. Using a separate analog ground minimizes
audio noises and improves the audio circuit's immunity from external interferences.
May 31, 2007
Module Hardware Description
41
A/D Interface
A/D Interface
The G24 includes 5 Analog to Digital Converter (ADC) signals with 10-bit resolution, for
environmental and electrical measurements. The ADC signals measure an analog DC voltage
level on their inputs which is converted to a 10-bit digital value for further processing by G24 or
the user application.
The A/D signals operation and reporting mechanism is defined by the AT+MMAD command.
Each A/D can be defined to provide several reports:
• A single measurement.
A single A/D measurement will take place and will be reported upon activation of the AT
command.
• An automatic periodical measurement.
The A/D measures its input signal at a rate that is defined by the user application. Every
measurement will generate an unsolicited message over the serial interface.
• An automatic periodical measurement with predefined limits.
The A/D measures its input signal at a rate that is defined by the user. The user also defines
upper and/or lower limits for the A/D measurements. Each measurement is compared to
these limits, and an unsolicited message is generated only if these limits are exceeded.
Important:
In case the defined periodical measurement rate is equal to, or shorter than, the
defined sleep mode delay settings (ATS24), G24 will not enter low power mode.
Table 2-17 below, lists the internal and external A/D signals provided by G24.
Table 2-17: A/D Signals
ADC Name
Description
Pin #
ADC
Min
Max
Unit
VCC
Power Supply ADC
3.0
4.5
Temp
Temperature ADC
-30
(229)
70
(17)
°C
(ADC)
ADC3
GPAD 3
47
2.3
ADC2
GPAD 2
43
2.3
ADC1
GPAD 1
37
2.3
Power Supply A/D
The main power supply (VCC) is constantly monitored internally by the G24 through a dedicated
A/D signal, which is not accessible on the interface connector.
The measured VCC level can be read and monitored by the user application through the
AT+MMAD command, which returns the measured VCC level in Volts times 100.
For example, a measured supply level of 3.65 Volts will be presented as 365 by the MMAD
command.
42
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Important:
During GSM transmissions the power supply may suffer voltage drops. This can
cause frequent and wide changes in the power supply A/D measurements. This
should be taken into account when designing and operating the G24 power supply
A/D interface.
Table 2-18 gives the supply A/D specifications.
Table 2-18: Supply A/D Specifications
Parameter
Measurement
Range
Conditions
Min
Typ
3.0
Resolution
10
Max
Unit
4.5
mV
Temperature A/D
The G24 incorporates an internal temperature sensor circuit, which is used to monitor the
operating temperature. The temperature is constantly monitored by G24 through a dedicated A/D
signal, which is not accessible at the interface connector. Figure 2-26 shows the temperature A/D
characteristics.
Figure 2-26: Temperature A/D Characteristics
May 31, 2007
Module Hardware Description
43
A/D Interface
The measured temperature level can be monitored by the user application through the
AT+MMAD command, which returns a digital decimal value that represents the measured
temperature level.
The actual temperature level (in degrees Celsius) can be derived from Table 2-19:
Table 2-19: Temperature Conversion Values
Temperature
(°C)
ADC
Value
Temperature
(°C)
ADC
Value
Temperature
(°C)
ADC
Value
-30
229
114
38
43
-29
226
111
39
41
-28
223
108
40
40
-27
219
105
41
39
-26
216
102
42
38
-25
213
100
43
37
-24
210
10
97
44
36
-23
206
11
94
45
34
-22
203
12
92
46
33
-21
199
13
89
47
32
-20
196
14
87
48
31
-19
192
15
84
49
31
-18
189
16
82
50
30
-17
185
17
79
51
29
-16
182
18
77
52
28
-15
178
19
75
53
27
-14
175
20
73
54
26
-13
171
21
71
55
26
-12
168
22
69
56
25
-11
164
23
67
57
24
-10
160
24
65
58
23
-9
157
25
63
59
23
-8
153
26
61
60
22
-7
150
27
59
61
21
-6
146
28
57
62
21
-5
143
29
56
63
20
-4
140
30
54
64
20
-3
136
31
52
65
19
-2
133
32
51
66
19
-1
130
33
49
67
18
127
34
48
68
18
123
35
47
69
17
120
36
45
70
17
117
37
44
A temperature level approximation can also be obtained using the following 5th order polynomial
formula:
44
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
y = -1.3e-9 * X5+8.91e-7 * X4-2.4e-4 * X3 + 3.298e2 -2.56 * X + 103.30
Where X is the digital temperature value reported by the MMAD command.
Table 2-20 gives the temperature A/D specifications.
Table 2-20: Temperature A/D Specifications
Parameter
Conditions
Measurement
Range
ADC Range
MMAD Value
Min
Typ
Max
Unit
-30
70
°C
229
17
ADC
Tolerance
General Purpose A/D
The G24 provides 3 general purpose A/D (GPAD) signals for customer application use. Each A/D
signal can monitor a separate external voltage and report its measured level independently to the
application, through the AT command interface.
The GPAD signals measure a DC voltage level of 0 - 2.3 V, which is converted internally to a
10-bit digital value. The user application can monitor the A/D voltage level through the
AT+MMAD command, which returns the measured DC level in Volts times 100.
For example, a measured analog DC level of 1.75 Volts will be presented as 175 by the MMAD
command.
Table 2-21 gives the GPAD specifications.
Table 2-21: GPAD Specifications
Parameter
Conditions
Maximum
Input Voltage
Operating range
Measurement
Voltage
ADC range
Min
Max
Unit
-0.1
2.75
2.3
Resolution
May 31, 2007
Module Hardware Description
Typ
10
mV
45
Controls and Indicators Interface
Controls and Indicators Interface
The G24 incorporates several interface signals for controlling and monitoring the module's
operation. The following paragraphs describes these signals and their operation.
Table 2-22 gives a description of the controls and indicators signals.
Table 2-22: Controls and Indicators
Connector Pin
Signal Name
Description
25
RESET_N
G24 system reset output indicator.
When high, G24 is operating.
27
VREF
2.75V regulated output.
Supplies external circuits up to
200mA.
26
WKUPO_N
Host application wake-up signal indicator.
41
ANT_DET
Antenna physical connection detect
indicator.
49
GPRS/GSM
Network status indicator.
39
TXEN_N
Transmission burst indication.
28, 30, 32, 34, 36,
38, 40, 42
GPIO 1-8
General purpose IO signals for customer use.
Reset
The RESET_N output signal indicates the G24's operating status. This signal is set high after
power up, when G24 is operating. It is set low when G24 is powered off.
When the RESET_N signal is low, the G24 interface signals are disabled and do not represent any
valid data or state. Furthermore, any input signals connected to the G24 interface must be
disabled (tri-state) or set low when RESET_N is low.
VREF Reference Regulator
The G24 incorporates a regulated voltage output, VREF. The regulator provides a 2.75V output
for use by the customer application. This regulator can source up to 200 mA of current to power
any external digital circuits.
Important:
46
The VREF regulator is powered from the G24's main power supply, and therefore
any current sourced through this regulator originates from the G24 VCC supply.
The overall VCC current consumed by G24 is directly affected by the VREF
operation. The G24 current consumption rises with respect to the current sourced
through VREF.
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
The VREF regulator incorporates 3 operating modes that are controlled by the AT+MVREF
command. These modes define the regulator operating state relative to the G24's operating mode.
Figure 2-27 shows the VREF power-up timing.
Figure 2-27: VREF Power-up Timing
OFF Mode
In this mode the VREF regulator is disabled and its output drops to 0V, regardless of the G24
operating state.
Standby Mode
The Standby operating mode is the default mode when G24 powers on. In this mode VREF
follows the G24's operating state.
When the G24 is in low power mode, Sleep mode, the VREF regulator is also in a low power
state. In this state the VREF regulated output is limited to providing only 2 mA of current
maximum, while maintaining the 2.75V output level.
When G24 is in Idle mode, or wakes up temporarily from low power mode, the VREF regulator
returns to full operation, supplying up to 200 mA.
Active Mode
In this mode the VREF regulator is always fully active while G24 is operating, regardless of the
G24 operating mode.
May 31, 2007
Module Hardware Description
47
Controls and Indicators Interface
Table 2-23 gives the VREF specifications.
Table 2-23: VREF Specifications
Parameter
Conditions
VOUT
IOUT = 200 mA
IOUT
Active mode
Standby mode
Min
Typ
Max
Unit
-3%
2.75
+3%
50
200
mA
Load regulation
0.27
Line regulation
PSRR
mV/
mA
20 Hz - 20 kHz
60
mV
dB
Wakeup Out
Some applications incorporate their own power saving mode, in which they operate with minimal
functionality, including disabling of interfaces and serial communications.
The wakeup-out (WKUPO_N) signal is an active low output, which is designed to support a low
power mode feature in the host application. This signal is used by G24 to indicate that it requires
to communicate with the host application through the serial interface, due to an incoming call or
data, or an unsolicited event. Applications that incorporate a low power mode should use this
signal as an indication to switch from low power mode to normal operation, and activate the serial
interface.
The wakeup-out mechanism, using the WKUPO_N signal, is controlled by 2 AT commands (see
Figure 2-28):
• ATS102 - Defines the delay time in milliseconds that G24 will wait, after asserting the
WKUPO_N signal low, before sending data on the serial interface. This delay is required to
allow the application enough time to reactivate from low power mode and switch to normal
mode.
If ATS102=0, which is the default value, the WKUPO_N signal and mechanism is disabled.
In case the serial interface incorporates hardware flow control signals, the data will be sent
according to their state, after the ATS102 delay time has expired.
• ATS100 - Defines the application minimal wakeup duration, in seconds, for a single wakeup
event. This time definition is required to avoid frequent unnecessary wakeup events and
consequent ATS102 delays.
The application may return to low power mode after the serial interface has been inactive for
the duration set by ATS100. This duration is measured from the last data sent or received on
the serial interface.
48
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Figure 2-28: WKUPO_N Operation
The following guidelines apply to the wakeup-out mechanism:
• G24 will set the WKUPO_N signal low to indicate that in has data to send through the serial
interface.
• G24 will start sending the data to the application after the delay defined by ATS102.
• The WKUPO_N signal will remain low while data is being sent to the host application.
• The host application should keep its serial interface active, and not switch to low power
mode, while the WKUPO_N signal is low.
• G24 will set the WKUPO_N signal high when it has completed sending the data.
• The application serial interface must stay active, and not switch to low power mode, for the
duration set by ATS100, after WKUPO_N is set high.
• G24 will not set the WKUPO_N signal low if it needs to send additional data during the
ATS100 delay time.
• The application may switch to low power mode after the WKUPO_N signal is set high and
the serial interface has been inactive for the duration set by ATS100.
Antenna Detection
The G24 incorporates an internal antenna detection circuit, which senses the physical connection
and removal of an antenna or antenna circuit on the G24 antenna connector. The antenna
detection state is reported to the application through the ANT_DET output signal, and may also
be queried by the ATS97 command.
The detection circuit senses DC resistance to ground on the G24 antenna connector.
A DC resistance below 100kohm (+10%) is defined as a valid antenna connection, and the
ANT_DET output signal is set high.
GPRS/EGPRS Detection
The GPRS output signal indicates the network GPRS/EGPRS connection status. When G24 is
connected to a GPRS/EGPRS network, this signal is enabled. When G24 is not connected to the
GPRS/EGPRS network this signal is disabled.
May 31, 2007
Module Hardware Description
49
Controls and Indicators Interface
Transmission Indicator
The TXEN_N output signal indicates when G24 is transmitting over the GSM network. This
signal follows the G24 GSM transmit bursts. This signal is set low during transmission burst, and
set high when no transmission is in progress.
Figure 2-29 shows the TXEN_N operation.
Figure 2-29: TXEN_N Operation
General Purpose I/O
The G24 incorporates 8 general purpose IO signals for the user application. Each GPIO signal
may be configured and controlled by AT command. These signals may be used to control or set
external application circuits, or to receive indications from the external application.
50
Module Hardware Description
May 31, 2007
Chapter 2: Hardware Interface Description
Antenna Interface
The G24 antenna connector is the RF interface to the GSM network.
The antenna interface is terminated by an MMCX connector type, which is 50Ω impedance
matched at the relevant GSM frequencies.
The antenna or antenna application must be installed properly to achieve best performance.
Table 2-24 gives the antenna interface specifications.
Table 2-24: Antenna Interface Specifications
Parameter
GSM 850
GSM 900
DCS 1800
PCS 1900
May 31, 2007
Conditions
Specifications
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
Gain
0 dBi (unity) gain or greater
Impedance
50Ω
VSWR
Less than: 2.5:1
Module Hardware Description
51
Antenna Interface
52
Module Hardware Description
May 31, 2007
Chapter 3: Electrical and Environmental Specifications
Absolute Maximum Ratings
Table 3-1 gives the maximum electrical characteristics of the G24 interface signals.
Caution:
Exceeding the values may result in permanent damage to the module.
Table 3-1: Maximum Ratings
Parameter
Conditions
VCC Supply
May 31, 2007
Min
Max
Unit
-0.2
4.5
Digital Input Signals
(Except for IGN,
VBUS, USB_DP,
USB_DN)
G24 powered on
-0.2
Analog Input Signals
(Audio, A/D interfaces)
G24 powered on
-0.2
2.75
All Input Signals
(Except for IGN,
VBUS, USB_DP,
USB_DN)
G24 powered off
-0.2
0.2
IGN signal
-0.2
16
VBUS signal
-0.2
10
USB_DP, USB_DN
-0.2
Module Hardware Description
53
Environmental Specifications
Environmental Specifications
Table 3-2 gives the environmental operating conditions of the G24 module.
Caution:
Exceeding the values may result in permanent damage to the module.
Table 3-2: Environmental Ratings
Parameter
Min
Max
Unit
Ambient Operating
Temperature
-20
60
°C
Storage Temperature
-40
85
°C
ESD
Conditions
At antenna connector
Contact
Air
At interface connector
KV
±6
± 15
±1
Application Interface Specifications
Table 3-3 summarizes the DC electrical specifications of the application interface connector
signals.
54
Important:
Interface signals that are not used by the customer application must be left
unconnected. G24 incorporates the necessary internal circuitry to keep unconnected
signal in their default state. Do not connect any components to, or apply any voltage
on, signals that are not used by the application.
Important:
It is recommended to place a pull-down resistor in the customer application, on the
IGN signal. A 100 kohm resistor, or less, is acceptable.
Important:
Signals that are defined as "Do Not Use", or DNU, must remain externally
unconnected in any case. These signals are reserved for future use.
Module Hardware Description
May 31, 2007
Chapter 3: Electrical and Environmental Specifications
Table 3-3: Interface Specifications
Level
Signal
Name
Pin #
Active Internal
Description I/O
H/L
PU/PD Parameter Conditions
Min
Typ
Max Units
3.3
3.6
4.2
1.9
2.0
75
85
µA
Power:
GND
Ground
VIN
VCC
DC power
supply
Reference
regulator output
IMAX
VCC = 3.6 V
IOFF
Control:
27
16
26
25
53
51
39
41
49
VREF
WKUPI_N
G24 wakeup
input
WKUPO_
Host wakeup
output
RESET_N
Reset signal
output
ON_N
IGN
TXEN_N
ANT_DET
GPRS
May 31, 2007
On/Off switch I
Ignition input
Transmit indicator
Antenna presence indicator
GPRS/
EGPRS coverage indicator
22K PU
22K PU
47K PD
200K
PU
VOUT
IOUT< 200 mA -3%
2.75
+3%
IOUT
Active mode
Standby mode
50
200
mA
2.775
3.0
0.4
2.0
VIH
VIL
VOH
VOL
IOUT < 2 mA
VOH
VOL
IOUT < 4 mA
2.575
2.775
2.675
VIH
VIL
2.0
VIH
VIL
2.0
IOUT < 4 mA
VOH
VOL
IOUT < 2 mA
VOH
VOL
IOUT < 2 mA
2.675
0.1
2.775
3.0
0.2
16
Module Hardware Description
0.1
2.775
0.2
2.775
0.4
2.775
2.575
2.575
0.2
2.775
VOH
VOL
0.2
55
Application Interface Specifications
Table 3-3: Interface Specifications (Cont.)
Level
Pin #
Signal
Name
Active Internal
Description I/O
H/L
PU/PD Parameter Conditions
Min
Typ
Max Units
2.0
2.775
3.0
0.4
UART1:
21
TXD_N
UART1 TXD
100K
PU
11
RXD_N
UART1 RXD
100K
PU
VIH
RTS_N
UART1 RTS
100K
PU
VIL
15
CTS_N
UART1 CTS
19
DTR_N
UART1 DTR
100K
PU
VOH
VOL
13
DSR_N
UART1 DSR
100K
PU
17
DCD_N
UART1 DCD
100K
PU
23
RI_N
UART1 RI
100K
PU
RXD2_N
UART2 RXD
100K
PU
VIH
VIL
IOUT < 2 mA
2.575
2.775
0.2
2.775
3.0
0.4
UART2:
29
31
TXD2_N
UART2 TXD
100K
PU
33
RTS2_N
UART2 RTS
100K
PU
VOH
100K
PU
VOL
35
CTS2_N
UART2 CTS
USB_VBUS
USB bus
power
2.0
IOUT < 2 mA
2.575
2.775
0.2
5.0
5.25
USB:
10
VIH
4.5
VIL
12
14
56
USB_DP
USB_DN
USB bus
serial data
I/O
USB bus
serial data
I/O
VIH
VIL
3.0
NOTE 1
VOH
VOL
Module Hardware Description
3.0
0.2
3.3
3.6
0.8
3.3
0.3
May 31, 2007
Chapter 3: Electrical and Environmental Specifications
Table 3-3: Interface Specifications (Cont.)
Level
Pin #
Signal
Name
Active Internal
Description I/O
H/L
PU/PD Parameter Conditions
Min
Typ
Max Units
VIH
VIL
2.0
2.775
3.0
0.4
VOH
-3%
2.85
+3%
SIM Card:
50
SIM_PD_N
SIM presence
detect
47K PU
48
SIM_VCC
SIM supply
44
SIM_RST_
SIM reset
52
SIM_DIO
SIM serial
data
I/O
5.6K PU
46
SIM_CLK
SIM clock
5.6K PU
5.6K PU
VOH
2.85
NOTE 2
VOL
0.4
2.775
3.0
0.4
Digital Audio:
18
PCM_
DIN
Digital audio
receive
100K
PD
20
PCM_
DOUT
Digital audio
transmit
100K
PU
22
PCM_CLK
Digital audio
clock
100K
PD
24
PCM_FS
Digital audio
frame sync.
100K
PD
May 31, 2007
VIH
2.0
VIL
VOH
IOUT < 2 mA
VOL
Module Hardware Description
2.575
2.775
0.2
57
Application Interface Specifications
Table 3-3: Interface Specifications (Cont.)
Level
Pin #
Signal
Name
Active Internal
Description I/O
H/L
PU/PD Parameter Conditions
Min
Typ
Max Units
2.0
2.775
3.0
0.4
GPIO:
28
GPIO1
General purpose I/O
I/O
100K
PU
30
GPIO2
General purpose I/O
I/O
100K
PU
32
GPIO3
General purpose I/O
I/O
22K PU
34
GPIO4
General purpose I/O
I/O
22K PU
36
GPIO5
General purpose I/O
I/O
22K PU
38
GPIO6
General purpose I/O
I/O
22K PU
VIH
VIL
2.575
VOH
2.775
IOUT < 2 mA
VOL
32
40
GPIO7
General purpose I/O
I/O
22K PU
42
GPIO8
General purpose I/O
I/O
22K PU
67
SPKR_N
Speaker
inverted
RL
69
SPKR_P
Speaker
VACPP
63
ALRT_N
Alert speaker
inverted
RL
65
ALRT_P
Alert speaker
VACPP
61
MIC
Microphone
input
RIN
0.2
Audio:
Single ended,
no load
2.5
Single ended,
no load
AGND
Audio ground
57
HDST_
MIC
Headset
microphone
input
1K
Headset
detect interrupt
55
58
HDST_
INT_N
1K
200K
PU
VIH
VIL
Module Hardware Description
2.0
Ω
2.5
VPP
Ω
2.5
RIN
Ω
3.5
VACPP
59
Ω
2.775
3.0
0.2
May 31, 2007
Chapter 3: Electrical and Environmental Specifications
Table 3-3: Interface Specifications (Cont.)
Level
Signal
Name
Pin #
Active Internal
Description I/O
H/L
PU/PD Parameter Conditions
Min
Typ
Max Units
A/D:
37
ADC1
General purpose A/D
VIN
2.75
43
ADC2
General purpose A/D
VIN-ACTIVE
2.3
47
ADC3
General purpose A/D
IADC
0.75
mA
45
UID
Do Not Use
Resolution
10
mV
Display:
54
CLI_CS
Do Not Use
60
LCD_RS
Do Not Use
56
LCD_
DATA
Do Not Use
58
LCD_CLK
Do Not Use
Data Logger:
70
SPI_CS
Do Not Use
62
SPI_IRQ_
Do Not Use
64
SPI_DIN
Do Not Use
68
SPI_
DOUT
Do Not Use
66
SPI_CLK
Do Not Use
Note 1:Per USB Specifications Rev 2.0.
Note 2:Per ISO 7816-3 IC specifications.
May 31, 2007
Module Hardware Description
59
Application Interface Specifications
60
Module Hardware Description
May 31, 2007
Chapter 4: Mechanical Specifications
Board Dimensions
Figure 4-1 describes the G24 mechanical characteristics.
Figure 4-1: G24 Mechanical Characteristics
May 31, 2007
Module Hardware Description
61
Interface Connector Specifications
Interface Connector Specifications
The G24 uses a single 70-pin, 0.5 mm pitch, board to board connector for the application
interface, which is available in 2 stacking height versions, as described in Table 4-1.
Table 4-1: G24 interface connector options
G24 Connector
Mating Connector
Stacking Height
Molex 53748-0708
Molex 52991-0708
3.0 mm
Molex 53885-0708
Molex 54102-0708
2.5 mm
Figure 4-2 shows the G24 interface connectors.
Figure 4-2: G24 Interface Connectors
Table 4-2 describes the G24 interface connectors characteristics.
Table 4-2: Interface Connector Specifications
62
Parameter
53748 (3.0 mm)
53885 (2.5 mm)
Contacts
70
70
Rows
Pitch
0.5 mm
0.5 mm
Maximum Current
500 mA
500 mA
Maximum Voltage
50 V
50V
Contact Resistance
50 mΩ maximum
40 mΩ maximum
Insulation
Resistance
100 MΩ minimum
100 MΩ minimum
Durability
50 mated cycles
maximum
30 mated cycles
maximum
Stacking Height
3.0 mm
2.5 mm
Mates with
Molex 52991-0708
Molex 54102-0708
Module Hardware Description
May 31, 2007
Chapter 4: Mechanical Specifications
Mating Connectors
The mating connectors incorporate the same electrical and mechanical characteristics as the
corresponding G24 interface connectors, which are described in Table 4-2.
Figure 4-3 provides a reference drawing of the mating connectors mechanical dimensions.
Figure 4-3: Mating Connectors Dimensions
For more information on the G24 mating connectors, please refer to the Molex web site at
http://www.molex.com.
May 31, 2007
Module Hardware Description
63
RF Connector Specifications
RF Connector Specifications
The G24 uses a standard MMCX receptacle connector for the radio interface. The
connector is manufactured by Amphenol, PN MMCX6251S5.
Figure 4-4 shows the MMCX connector dimensions.
Figure 4-4: MMCX Connector Dimensions
Table 4-3 describes the G24 RF connector characteristics.
Table 4-3: RF Connector Specifications
Parameter
Specifications
Rated Voltage
335 VRMS
Impedance
50 Ω
Contact Resistance
5 mΩ center contact
2.5 mΩ outer contact
Insulation
Resistance
1000 MΩ
Insertion Force
3.4 lbs maximum
Withdrawal Force
4.5 lbs maximum
Contact Retaention
Force
4 lbs maximum
Durability
500 mated cycles maximum
Mating Connector
The RF mating connector should be a standard MMCX plug connector or cable
assembly, which corresponds to the G24 MMCX connector specifications.
Any standard MMCX connector or application from different manufacturers may be
mated with G24.
64
Module Hardware Description
May 31, 2007
Chapter 4: Mechanical Specifications
Such a cable assembly example is the Huber-Suhner PN 11_MMCX-50-1-2/111_OH,
which is illustrated in Figure 4-5.
Figure 4-5: Optional MMCX Cable Assembly
May 31, 2007
Module Hardware Description
65
G24 Mounting
G24 Mounting
The G24 incorporates 2 mechanical holes for installing the module onto the
application board. The holes are 2.4 millimeters in diameter, which accommodates
several types of mechanical elements.
Several mechanical approaches may be applied to mount and fasten G24 to the
application board. Using M2 screws with suitable washers to mount the module onto
spacers, a bracket or chassis is a recommended design.
Special attention must be paid to the area surrounding the G24 mounting holes.
Several electrical components, which are not shielded, are located near the holes.
These components must not be in contact with the mounting elements or with other
parts of the application board, and care must be taken to avoid any damage.
The holes are used for mechanical mounting of G24 to the application board but also
for grounding support. Using conductive elements to install G24 significantly
improves the overall grounding of the module and therefore improves the G24
performance and stability.
It is required to use screws or other mechanical elements to fasten G24 to the
application board, but it is highly recommended to use conductive elements to
improve the module's performance.
66
Module Hardware Description
May 31, 2007
Chapter 5: Service and Testing
Service
This section provides contact information for any possible queries that may arise, for example:
• Have questions?
•
•
•
•
•
Having trouble getting the Developer Board set up?
Technical questions?
Configuration questions/problems?
Technical operating problems?
Need documentation?
Who to Contact?
The GSM/CDMA Data Module Customer Support Center is ready to assist you on
integration issues.
Direct Customer. Use this following email address to contact customer assistance:
M2M.CustomerCare@motorola.com
Note: 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.
Indirect Customer. Send requests to your distributor and not to Motorola help desk.
Required Query Information
Every new call/problem report, directly from a Direct Customer or from a distributor, should be
directed to the help desk email address noted above in “Who to Contact?” . 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 (G24)
May 31, 2007
Module Hardware Description
67
Service
•
•
•
•
Software version of the unit (ATI8 command) or model number
PCB version (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)
– Setup Configuration (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
• 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
•
•
•
•
•
•
•
68
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
Module Hardware Description
May 31, 2007
Chapter 5: Service and Testing
Service Centers
RMA Logistics
13801 Diplomat Dr.
Farmers Branch, TX 75234-8813 US
http://www.rmslogistics.com/contact-us.asp
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
Motorola Communications ISRAEL Ltd.
Service Operation
Attention: Shukrun Ofer
3 Krementski Street
Tel Aviv, Israel 67899
Telephone: (972) 3 5658829
JNB Electronics Pty Ltd.
347 Settlement Road, Thomastown
VIC 3074
Australia
Flextronics
Transportation group leader
Zalaegerszeg Industrial Park 1 PCC
Building 1 PCC Posta u. 63
H-8900 Zalaegerszeg
Hungary
BGH do Brasil Comunicações e Serviços Ltda.
Al Ceci, 534 - Galpão 3
Barueri - SP - Brazil
Tel: 54 11 4309 2046
FeiHongDaLi Telecommunications Technology Co.Ltd.,TianjinSHi
B-6F JuFu Yuan Building
XinKai Road, Hedong District,
Tianjin 300011
China
Field service should be coordinated with the Service Manager in Motorola using the following
email address: n2csfs01@motorola.com
May 31, 2007
Module Hardware Description
69
Testing a Standalone Unit
Testing a Standalone Unit
This section describes how to perform a G24 functionality test, whose purpose is to:
• Introduce the user to the G24
• Explain how to work with the G24 unit
• Describe how to evaluate basic G24 features
The test setup provides a wide platform through which a G24 unit can be evaluated. The specific
test procedure described below covers only a few of the G24’s many features. Using this setup,
you can perform several additional tests on the G24.
The test is performed using two modems, one of which is the G24. The modems communicate
with each other through a single computer, which also controls their operation.
The test requires knowledge about the operation of the G24 Developer’s Kit, terminal
applications and AT commands. Refer to relevant documentation for assistance.
To perform the test, you need the following:
• A G24 OEM cellular engine unit
• A G24 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)
Test Setup
To Setup the G24 Test
Follow this procedure (Figure 5-1) 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
You can use a second G24 unit instead of the line modem. When doing so, you must repeat
the setup procedure that follows for the additional G24.
2. Set up the G24 and the Developer Board as described in “Initial Setup” in
“Chapter 2: Developer Board and Interfaces Description” in the “G24 Developer’s Kit”
(Motorola part no. 6889192V26)
3. Verify that the G24 has adequate reception from the local GSM network
4. Connect the Developer Board’s RS232 port to the computer’s serial port
5. Open a terminal application window (such as HyperTerminal) and configure it to operate
with the serial port occupied by the G24
70
Module Hardware Description
May 31, 2007
Chapter 5: Service and Testing
6. Open a second terminal window and configure it to operate with the serial port occupied by
the line modem
Computer
To telephone line
wall outlet
Line Modem
(internal or external)
Serial
Port
Serial
Port
Serial
Cable
Developer Board
with G24 unit
RS232
Port
Figure 5-1: Test Setup
May 31, 2007
Module Hardware Description
71
Testing a Standalone Unit
Test Procedure
To Perform the G24 Test
Follow the procedure below to perform the G24 test:
1. 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.
2. Verify that the G24 is functioning and communicating with the computer by performing the
following AT commands in the G24 terminal window:
• ati7 —prompts G24 identification
The G24 will reply G24 OEM Module.
• ati8 —prompts the G24 software version
3. Make a CSD call from the G24 to the line modem or the reverse using the atd and ata
commands in the appropriate window
4. Verify that a connection between the two modems is established
5. Select any file to transfer between the two modems
The file can be any existing file, or a new file created specifically for the test.
6. Send the file either from the G24, or to the G24, through the terminal application using the
terminal application’s send/receive file options
7. When the file transfer is complete, 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.
72
Module Hardware Description
May 31, 2007
Acronyms and Abbreviations
Abbreviation
Full Name
A AMR
Adaptive Multi Rate
A AOC
Advice of Charge
B BR
Baud Rate
B bps
Bits Per Second
C CSD
Circuit Switched Data
C CTS
Clear to Send
D DCD
Data Carrier Detect
D DCE
Data Communication Equipment (such as modems)
D DCS
Digital Cellular System (GSM in the 1800MHz band)
D DOC
Department of Communications (Canada)
D DRX
Discontinuos Reception
D DSP
Digital Signal Processor
D DSR
Data Set Ready
D DTE
Data Terminal Equipment (such as terminals, PCs and so on)
D DTMF
Dual Tone MultiFrequency
D DTR
Data Terminal Ready
D DTX
Discontinuos Transmission
E EFR
Enhanced Full Rate
E EGPRS
Enhanced General Packet Radio Service
E EGSM
Extended Global System for Mobile Communications
E EIRP
Effective Isotropic Radiated Power
E EMC
Electromagnetic Compatibility
E EOTD
Enhanced Observed Time Difference
E EPOS
Electronic Point of Sale
E ERP
Effective Radiated Power
E ESD
Electrostatic Discharge
E ETSI
European Telecommunication Standards Institute
May 31, 2007
Module Hrdware Description
Acr & Abbr-1
F-P
Abbreviation
Full Name
F FCC
Federal Communications Commission (U.S.)
F FR
Full Rate
F FTA
Full Type Approval
G GCF
GSM Certification Forum
G GPIO
General Purpose Input/Output
G GPRS
General Packet Radio Service
G GSM
Global System for Mobile Communications
H HR
Half Rate
IC
Integrated Circuit
L LNA
Low-noise Amplifier
M MMCX
Miniature Micro Coax
M MO
Mobile Originated
M MT
Mobile Terminated
O OEM
Original Equipment Manufacturer
P PCB
Printed Circuit Board
P PCL
Power Class Level
P PCM
Pulse Code Modulation
P PCS
Personal Communication System (also known as GSM 1900)
P PD
Pull Down
P PDA
Personal Data Assistant
P PDU
Packet Data Unit
P PLL
Phase-locked Loop
P PTCRB
PCS-1900 Type Certification Review Board (GSM North America)
P PU
Pull Up
Acr & Abbr-2
Module Hrdware Description
May 31, 2007
R-T
Acronyms and Abbreviations
Abbreviation
Full Name
R R&TTE
Radio and Telecommunications Terminal Equipment
R RMS
Root Mean Square
R RI
Ring Indicator
R RTS
Request To Send
S SAR
Specific Absorption Rate
S SIM
Subscriber Identity Module
S SMS
Short Message Service
S SPI
Serial Peripheral Interface
T TDMA
Time Division Multiple Access
May 31, 2007
Module Hrdware Description
Acr & Abbr-3
U-V
Abbreviation
Full Name
U UART
Universal Asynchronous Receiver Transmitter
U USB
Universal Serial Bus
U USSD
Unstructured Supplementary Services Data
V VCC
Voltage Common Collector
V VSWR
Voltage Standing Wave Ratio
Acr & Abbr-4
Module Hrdware Description
May 31, 2007
Index
Antenna Installation, xi
Approvals
Regulatory, 5
Block Diagram Description, 7
Environmental
Specifications, 3
G24
Abbreviations, 2
Antenna Installation, xi
Block Diagram Description, 7
Product Specifications, 2
Regulatory Approvals, 5
Safety Precautions, x
Standards, xi
Terms and Abbreviations, 2
Testing, 70
User Operation, x
Physical Specifications, 2
Precautions, x
Product Specifications, 3
Regulatory Approvals, 5
Safety Precautions, x
Specifications, 2
Environmental, 3
Physical, 2
Standards, xi
Support Center, 67
Terms, 2
Testing, 70
Test Procedure, 72
Test Setup, 70
User Operation, x
Organization of Manual, xix
May 31, 2007
Module Hardware Description
Index-1
Index
Index-2
U-U
Module Hardware Description
May 31, 2007
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 2007 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.
@6889192V27@
6889192V27-F

---

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.4
Linearized                      : No
Encryption                      : Standard V2.3 (128-bit)
User Access                     : Print, Extract, Print high-res
Create Date                     : 2007:05:20 07:51:48Z
Modify Date                     : 2007:08:14 13:49:53-04:00
Page Mode                       : UseOutlines
Producer                        : Acrobat Distiller 6.0 (Windows)
Mod Date                        : 2007:08:14 13:49:53-04:00
Creation Date                   : 2007:05:20 07:51:48Z
Author                          : Motorola
Creator Tool                    : FrameMaker 7.1
Metadata Date                   : 2007:08:14 13:49:53-04:00
Document ID                     : uuid:65577ade-d0df-4c47-bb38-e28f2f1e40e4
Instance ID                     : uuid:00fac481-bc80-4753-a333-49e27f233142
Format                          : application/pdf
Title                           : g20 Cell Engine Module Description
Creator                         : Motorola
Page Count                      : 105

EXIF Metadata provided by EXIF.tools