Wavecom Q2686 User manual

Revision: 010
Date: June 30, 2009
Reference: WM_PRJ_Q2686_PTS_001
Q2686 Wireless CPU®
Product Technical Specification

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WM_PRJ_Q2686_PTS_001-010 June 30, 2009
Q2686 Wireless CPU®
Q2686 Wireless CPU®
Product Technical Specification
Reference: WM_PRJ_Q2686_PTS_001
Revision:
010
Date:
June 30, 2009
Supports Open AT®embedded ANSI C applications

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written agreement.
WM_PRJ_Q2686_PTS_001-010 June 30, 2009
Q2686 Wireless CPU®
Document History
Level Date List of revisions
001 01/17/2005 Creation (Preliminary version)
002 06/01/2005 Pin-out modification (see chapter 3.1)
003 15/09/2005
Update Functional architecture
Pin-out modification (see chapter 4.1)
Add RESET state of all IOs of all interfaces
Update power supply range (see chapter 3.2)
Update electrical information for digital IO
(see chapter 3.2)
Update SPI bus configuration (see chapter 3.4)
Remove 3 GPIO (see chapter 3.9)
Change MIC1 biasing voltage configuration
(see chapter 3.11)
Change SPK1 definition to only single-ended
(see chapter 3.11)
Update ON/ÕFF operating sequence (see chapter 3.14)
Update BOOT definition (see chapter 3.15)
Update ~RESET operating sequence and electrical characteristics
(see chapter 3.14)
Update Interrupt activation (see chapter 3.17)
Update RTC electrical characteristics (see chapter 3.19)
Update PCM description and add waveform
(see chapter 3.21)
004 November 22,
2005
Update Q2686 version “Overview” section
Update “Cautions”, “Trademarks” and “Copyright”
Update “Electrical information for digital I/O”
(see chapter 3.3)
Update SPI max frequency (see chapter 3.4)
Update available GPIO (see chapter 3.9)
Add “OFF state“ voltage caution (see chapter 3.2)
Update “Battery charging interface” (see chapter 3.13)
Update “Analog audio interface” (see chapter 3.11)
Update ”Environmental Specifications” (see chapter 4.2)
Update “General Purpose Connector pin-out description” (see
chapter 4.1)
005 February 2006 Update “PCM interface” waveform (see chapter 3.21)
Update “Electrical information for digital IO” absolute maximum
rating (see chapter 3.3)
Update “General purpose connector” (see chapter 3.1)
Update “SPI bus” speed (see chapter 3.4.1)
Update “I²C bus” (see chapter 3.4.2)
Update “Main serial link UART 1” maximum speed
(see chapter 3.6)
Update “Auxiliary serial link UART 2” maximum speed (see
chapter 3.7)
Update “SIM” General description (see chapter 3.8.1)
Update “USB 2.0 interface” features (see chapter 3.22)
Update “Operating system upgrade” (see chapter 6.3)
Update “General purpose input/output” signals description (see
chapter 3.9)
Update “General purpose connector pin-out description” signal
description (see chapter 4.1)
Update “Battery charging interface” (see chapter 3.13)
Update “Analog to μDigital Converter” (see chapter 3.10)
Update “FLASH-LED signal” (see chapter 3.20)

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WM_PRJ_Q2686_PTS_001-010 June 30, 2009
Q2686 Wireless CPU®
Level Date List of revisions
Update ‘Analog Audio interface” (see chapter 3.11)
006 March 2006
Update “Power consumption” (see chapter 3.3.2)
Update “ON/~OFF signal” (see chapter 3.14)
Update “BAT-RTC” (see chapter 3.19)
Update “Electrical information for digital IO” absolute maximum
rating (see chapter 3.3)
Update “Buzzer output”, remove PWM features ( see chapter 3.12
)
Update “EMC recommendation” add ESD recommendations (see
chapter 6.1.1 )
Update “SPI bus” add waveforms ( see chapter 3.4.1 )
Update “I²C bus” add waveforms ( see chapter 3.4.2 )
Update “Analog to Digital Converter“ sampling rate
(see chapter 3.10)
007 March 2007
Modification of the ON/ ~OFF paragraph
Add ATEX 94/9/CE directive information in section 4.4
Update reference documents
Update section 3.6 “Main serial link (UART1)”
Other minor corrections
008 June 2008
Software update : Open AT®Software Suite v2
Consumption modifications: ( see chapter 3.22)
Modification in analog audio interface ( see chapter 3.11 ).
Update of Temperature Class B (-30 °C + 85°C ) ( see chapter 4.3 )
New chapter for correspondences of labelling between Q2686
with Open AT®Software Suite v2 ( see chapter 4.2 )
ADC modifications: ( see chapter 3.10)
SPI modification: ( see chapter 3.4 )
BUZZER modifications : ( see chapter 3.12 )
LED0 : new designation : ( see chapter 3.20 and 4.2)
GPIO44:new designation: ( see chapter 4.2 )
Reset signal: modification on input impedance (see chapter 3.16)
Current start up definition ( see chapter 3.2.2 )
Charger interface updated ( see chapter 3.13 )
RTC interface : Maximum input voltage updated (see chapter
3.19.1)
009 May 14, 2009 Update Storage temperature in section 4.3.
Updates to contents of section 7.1.
010 June 30, 2009
Updated to antenna gain information in section 7.1.

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WM_PRJ_Q2686_PTS_001-010 June 30, 2009
Q2686 Wireless CPU®
Overview
This document defines and specifies the Q2686 Wireless CPU®, available in a
GSM/GPRS Class 10 quad-band version:
•Q2686H: EGSM/GPRS 900/1800/850/1900 MHz version with 32 Mb of
Bursted Flash memory and 8Mb of SRAM (32/8).
•Q2686G: EGSM/GPRS 900/1800/850/1900 MHz version with 64 Mb of
Bursted Flash memory and 16 Mb of SRAM (64/16).
The Q2686 Wireless CPU®supports a powerful open software platform (Open
AT®). Open AT®is the world’s most comprehensive cellular development
environment, which allows embedded standard ANSI C applications to be
natively executed directly on the Wireless CPU®.
This Product Technical Specification document covers the Wireless CPU®alone
and does not include the programmable capabilities provided via the use of
Open AT®Software Suites.
For detailed software programming guides, refer to the documents shown in the
“WM_PRJ_Q2686_PTS_001” section.

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WM_PRJ_Q2686_PTS_001-010 June 30, 2009
Q2686 Wireless CPU®
Cautions
This platform contains a modular transmitter. This device is used for wireless
applications. Note that all electronics parts and elements are ESD sensitive.
Information provided herein by WAVECOM is accurate and reliable. However, no
responsibility is assumed for its use and any of such WAVECOM information is
herein provided “as is” without any warranty of any kind, whether express or
implied.
Trademarks
, , ®, inSIM®, “YOU MAKE IT, WE MAKE IT
WIRELESS”®, WAVECOM®, WISMO®, Wireless Microprocessor®, Wireless CPU®,
Open AT®and certain other trademarks and logos appearing on this document,
are filed or registered trademarks of Wavecom S.A. in France and/or in other
countries. All other company and/or product names mentioned may be filed or
registered trademarks of their respective owners.
Copyright
This manual is copyrighted by WAVECOM with all rights reserved. No part of
this manual may be reproduced, modified or disclosed to third parties in any
form without the prior written permission of WAVECOM.
No Warranty/No Liability
This document is provided “as is”. Wavecom makes no warranties of any kind,
either expressed or implied, including any implied warranties of merchantability,
fitness for a particular purpose, or noninfringement. The recipient of the
documentation shall endorse all risks arising from its use. In no event shall
Wavecom be liable for any incidental, direct, indirect, consequential, or punitive
damages arising from the use or inadequacy of the documentation, even if
Wavecom has been advised of the possibility of such damages and to the extent
permitted by law.

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WM_PRJ_Q2686_PTS_001-010 June 30, 2009
Q2686 Wireless CPU®
Web Site Support
General information about Wavecom and its
range of products:
www.wavecom.com
Specific support about the Q2686 Wireless
CPU®:
www.wavecom.com/Q2686
Carrier/Operator approvals: www.wavecom.com/approvals
Open AT®Introduction: www.wavecom.com/OpenAT
Developer support for software and hardware: www.wavecom.com/forum

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WM_PRJ_Q2686_PTS_001-010 June 30, 2009
Q2686 Wireless CPU®
Table of Contents
1References ................................................................................ 13
1.1 Reference Documents........................................................................... 13
1.1.1 Open AT® Software Documentation............................................... 13
1.1.2 AT Software Documentation......................................................... 13
1.1.3 Hardware Documents ................................................................... 13
1.1.4 Other Wavecom Documents ......................................................... 13
1.1.5 General Reference Documents ...................................................... 13
1.2 List of Abbreviations ............................................................................. 14
2General Description .................................................................. 17
2.1 General Information .............................................................................. 17
2.1.1 Overall Dimensions ....................................................................... 17
2.1.2 Environment and Mechanics......................................................... 17
2.1.3 GSM/GPRS Features ..................................................................... 17
2.1.4 Interfaces ...................................................................................... 17
2.1.5 Operating System ......................................................................... 18
2.1.6 Connection Interfaces ................................................................... 18
2.2 Functional Architecture......................................................................... 19
2.2.1 RF Functionalities ......................................................................... 20
2.2.2 Baseband Functionalities .............................................................. 20
2.3 Operating System ................................................................................. 20
3Interfaces ................................................................................. 21
3.1 General Purpose Connector (GPC)......................................................... 21
3.2 Power Supply ....................................................................................... 22
3.2.1 Power Supply Description............................................................. 22
3.2.2 Power Consumption ..................................................................... 23
3.2.2.1 Start-up Current...................................................................... 24
3.2.2.2 Power Consumption without Open AT®Processing ................ 25
3.2.2.3 Power Consumption with Open AT®Software ........................ 26
3.2.2.4 Consumption Waveform Samples ........................................... 28
3.2.2.5 Power Supply Pin-out ............................................................. 30
3.3 Electrical Information for Digital I/O....................................................... 31
3.4 Serial interface...................................................................................... 33
3.4.1 SPI Bus ......................................................................................... 33
3.4.1.1 Characteristics ........................................................................ 33
3.4.1.2 SPI configuration..................................................................... 33
3.4.1.3 SPI waveforms........................................................................ 34
3.4.1.4 SPI1 Bus: Pins description ...................................................... 35

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Q2686 Wireless CPU®
3.4.1.5 SPI2 Bus: Pins description ...................................................... 35
3.4.2 I2C Bus ......................................................................................... 36
3.4.2.1 I²C Waveforms ........................................................................ 36
3.4.2.2 I²C Bus Pin-out ....................................................................... 37
3.5 Keyboard Interface................................................................................ 37
3.6 Main Serial Link (UART1) ...................................................................... 38
3.7 Auxiliary Serial Link (UART2) ................................................................ 40
3.8 SIM Interface ........................................................................................ 41
3.8.1 General Description....................................................................... 41
3.9 General Purpose Input/Output .............................................................. 43
3.10 Analog to Digital Converter................................................................... 45
3.11 Analog Audio Interface ......................................................................... 46
3.11.1 Microphone Features .................................................................... 46
3.11.1.1 MIC1 Microphone Inputs ........................................................ 46
3.11.1.2 MIC2 Microphone Inputs ........................................................ 47
3.11.2 Speaker Features .......................................................................... 49
3.11.2.1 Speakers Outputs Power......................................................... 49
3.11.3 Pin description .............................................................................. 51
3.12 Buzzer Output ...................................................................................... 52
3.13 Battery Charging Interface .................................................................... 53
3.13.1 Ni-Cd / Ni-Mh Charging Algorithm ................................................ 53
3.13.2 Li-Ion Charging Algorithm............................................................. 55
3.13.3 Pre-charging ................................................................................. 56
3.13.4 Temperature Monitoring ............................................................... 56
3.14 ON / ~OFF signal .................................................................................. 58
3.14.1 Operating Sequences .................................................................... 58
3.14.1.1 Power-ON ............................................................................... 58
3.14.1.2 Power-OFF.............................................................................. 61
3.15 BOOT Signal......................................................................................... 62
3.16 Reset Signal (~RESET).......................................................................... 63
3.17 External Interrupt.................................................................................. 65
3.18 VCC_2V8 and VCC_1V8 Output............................................................. 66
3.19 BAT-RTC (Backup Battery).................................................................... 67
3.19.1 Interface Description ..................................................................... 67
3.20 LED0 Signal .......................................................................................... 69
3.21 Digital Audio Interface (PCM)................................................................ 72
3.21.1 Description ................................................................................... 72
3.22 USB 2.0 Interface.................................................................................. 75
3.23 RF Interface .......................................................................................... 76
3.23.1 RF Connections............................................................................. 76
3.23.2 RF Performance ............................................................................ 76
3.23.3 Antenna Specifications ................................................................. 77
4Technical Specifications ........................................................... 78

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Q2686 Wireless CPU®
4.1 General Purpose Connector Pin-out Description.................................... 78
4.2 Labeling Correspondence between Q2686 and Open AT®Software Suite
v2 81
4.3 Environmental Specifications ................................................................ 82
4.4 Conformance with ATEX 94/9/CE directive............................................ 83
4.5 Mechanical Specifications..................................................................... 83
4.5.1 Physical Characteristics ................................................................ 83
4.5.2 Mechanical Drawings ................................................................... 83
5Connector and Peripheral Device References............................ 85
5.1 General Purpose Connector .................................................................. 85
5.2 SIM Card Reader .................................................................................. 85
5.3 Microphone .......................................................................................... 85
5.4 Speaker ................................................................................................ 86
5.5 Antenna Cable ...................................................................................... 86
5.6 RF Board-to-board Connector ............................................................... 86
5.7 GSM Antenna....................................................................................... 86
6Design Guidelines ..................................................................... 87
6.1 HARDWARE and RF.............................................................................. 87
6.1.1 EMC Recommendations................................................................ 87
6.1.2 Power Supply ............................................................................... 88
6.1.3 Layout Requirement...................................................................... 89
6.1.4 Antenna ........................................................................................ 90
6.2 Mechanical Integration ......................................................................... 90
6.3 Operating System Upgrade................................................................... 90
7Appendix................................................................................... 91
7.1 Standards and Recommendations ........................................................ 91
7.2 Safety Recommendations (for information only).................................... 95
7.2.1 RF Safety ...................................................................................... 95
7.2.1.1 General ................................................................................... 95
7.2.1.2 Exposure to RF Energy............................................................ 95
7.2.1.3 Efficient Terminal Operation .................................................... 95
7.2.1.4 Antenna Care and Replacement .............................................. 96
7.2.2 General Safety............................................................................... 96
7.2.2.1 Driving .................................................................................... 96
7.2.2.2 Electronic Devices ................................................................... 96
7.2.2.3 Vehicle Electronic Equipment .................................................. 96
7.2.2.4 Medical Electronic Equipment ................................................. 96
7.2.2.5 Aircraft.................................................................................... 97
7.2.2.6 Children .................................................................................. 97
7.2.2.7 Blasting Areas......................................................................... 97
7.2.2.8 Potentially Explosive Atmospheres.......................................... 97