Sierra Wireless Q2686 Installation guide
Product Technical Specification
Q2686 Wireless CPU
Reference: WM_PRJ_Q2686_PTS_001
Revision: 010
Date: June 30, 2009
®
Q2686 Wireless CPU®
Q2686 Wireless CPU
®
Product Technical Specification
Reference: WM_PRJ_Q2686_PTS_001
Revision:
Date:
010
June 30, 2009
Supports Open AT
© Confidential
This document is the sole and exclusive property of WAVECOM. Not to be distributed or divulged without prior
written agreement.
WM_PRJ_Q2686_PTS_001-010 June 30, 2009
®
embedded ANSI C applications
Page: 1 / 97
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
005 February 2006 Update “PCM interface” waveform (see chapter 3.21)
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)
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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Q2686 Wireless CPU®
Level Date List of revisions
Update ‘Analog Audio interface” (see chapter 3.11)
006 March 2006
007 March 2007
008 June 2008
009 May 14, 2009
010 June 30, 2009
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)
Modification of the ON/ ~OFF paragraph
Add ATEX 94/9/CE directive information in section
Update reference documents
Update section
Other minor corrections
Software update : Open AT
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
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)
Update Storage temperature in section
Updates to contents of section
Updated to antenna gain information in section 7.1.
3.6 “Main serial link (UART1)”
®
Software Suite v2
®
Software Suite v2 ( see chapter 4.2 )
7.1.
4.3.
4.4
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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 8 Mb 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
®
). Open AT® is the world’s most comprehensive cellular development
AT
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
and does not include the programmable capabilities provided via the use of
Open AT
®
Software Suites.
®
supports a powerful open software platform (Open
®
.
®
alone
For detailed software programming guides, refer to the documents shown in the
WM_PRJ_Q2686_PTS_001” section.
“
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written agreement.
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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
®
WIRELESS”
Open AT
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.
, WAVECOM®, WISMO®, Wireless Microprocessor®, Wireless CPU®,
®
and certain other trademarks and logos appearing on this document,
, ,
®
, inSIM®, “YOU MAKE IT, WE MAKE IT
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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written agreement.
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Web Site Support
Q2686 Wireless CPU®
General information about Wavecom and its
www.wavecom.com
range of products:
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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written agreement.
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Q2686 Wireless CPU®
Table of Contents
1 References................................................................................ 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
2 General 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
3 Interfaces ................................................................................. 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
4 Technical 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
5 Connector 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
6 Design 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
7 Appendix................................................................................... 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
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Q2686 Wireless CPU®
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written agreement.
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Q2686 Wireless CPU®
ADC
Q
Table of Figures
2
6
8
6
B
O
A
R
D
T
O
B
O
A
R
D
I
N
T
E
R
F
A
C
E
C
O
N
N
E
C
T
O
R
CHARGER
AUDIO FILTER
USB detection
SUPPLY INTERFACE
POWER
AUDIO
KEYPAD
PCM
UART2
UART1
USB
SIM 1.8V/3V
RTC
MEMORY
FLASH / SRAM
INTERFACE
EXT_IT
RF
SPI1
SPI2
I2C
GPIO
DAC
EBI
RF
TRANSCEIVER
RF
FRONT END
ANTENNA
COAX
UFL
IMP
Figure 1: Functional architecture................................................................. 19
Figure 2: Power supply during burst emission.................................................. 22
Figure 3: Start-up current waveform................................................................. 24
Figure 4: SPI Timing diagrams,Mode 0,Master,4 wires .................................... 34
Figure 5: SPI Timing diagrams with LOAD signal, Mode 0, Master, 4 wires..... 35
Figure 6: I²C Timing diagrams, Master .............................................................36
Figure 7: Ni-Cd / Ni-Mh charging waveform .....................................................53
Figure 8: Li-Ion full charging waveform ............................................................55
Figure 9: Power-ON sequence (no PIN code activated) ..................................... 59
Figure 10: Power-OFF sequence....................................................................... 61
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written agreement.
WM_PRJ_Q2686_PTS_001-010 June 30, 2009
Q2686 Wireless CPU®
Figure 11: Reset sequence waveform ............................................................... 63
Figure 12: Real Time Clock power supply ......................................................... 67
Figure 13: LED0 state during RESET and Initialization time............................... 71
Figure 14: PCM frame waveform ...................................................................... 73
Figure 15: PCM sampling waveform................................................................. 73
Figure 16: Environmental classes .....................................................................82
Figure 17: Mechanical drawing ........................................................................ 84
Figure 18: Layout requirement.......................................................................... 89
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Q2686 Wireless CPU®
1 References
1.1 Reference Documents
For more details, several reference documents may be consulted. The
Wavecom reference documents are provided in the Wavecom document
package, contrary to the general reference documents which are not authored
by Wavecom.
Please check the web site for the latest documentation available. Note that the
last software version available for Q2686 is Open AT
1.1.1 Open AT
[1] Getting started with Open AT
[2] Tutorial for Open AT
[3] Tools Manual for Open AT
[4] Basic Development Guide for Open AT
[5] ADL User Guide for Open AT
[6] Open AT
®
Software Documentation
®
®
®
Release Note
®
®
®
®
Software Suite v2.0.
1.1.2 AT Software Documentation
[7] AT commands interface Guide V7.1
[8] AT Commands Interface Guide (Bluetooth)
[9] Open AT
®
firmware Release Note
1.1.3 Hardware Documents
[10] Q2686 Wireless CPU
(Ref. WM_PRJ_Q2686_PTS_003)
[11] Q2686 Wireless CPU
®
Customer Design Guidelines
®
Process Customer Guidelines
(Ref.WM_PRJ_Q2686_PTS_004)
1.1.4 Other Wavecom Documents
[12] Automotive Environmental Control Plan for Q2686 Wireless CPU
®
(Ref. WM_T&D_Q2686_DCP_001)
1.1.5 General Reference Documents
[13] “I²C Bus Specification”, Version 2.0, Philips Semiconductor 1998
[14] ISO 7816-3 Standard
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1.2 List of Abbreviations
Abbreviation Definition
AC Alternating Current
ADC Analog to Digital Converter
A/D Analog to Digital conversion
AF Audio-Frequency
AT ATtention (prefix for modem commands)
AUX AUXiliary
CAN Controller Area Network
CB Cell Broadcast
CEP Circular Error Probable
CLK CLocK
CMOS Complementary Metal Oxide Semiconductor
Q2686 Wireless CPU®
CS Coding Scheme
CTS Clear To Send
DAC Digital to Analog Converter
dB Decibel
DC Direct Current
DCD Data Carrier Detect
DCE Data Communication Equipment
DCS Digital Cellular System
DR Dynamic R
ange
DSR Data Set Ready
DTE Data Terminal Equipment
DTR Data Terminal Ready
EFR Enhanced Full Rate
E-GSM Extended GSM
EMC ElectroMagnetic Compatibility
EMI ElectroMagnetic Interference
EMS Enhanced Message Service
EN ENable
ESD ElectroStatic Discharges
FIFO First In First Out
FR Full Rate
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Abbreviation
Definition
FTA Full Type Approval
GND GrouND
GPI General Purpose Input
GPC General Purpose Connector
GPIO General Purpose Input Output
GPO General Purpose Output
GPRS General Packet Radio Service
GPS Global Positioning System
GSM Global System for Mobile communications
HR Half Rate
I/O Input / Output
LED Light Emitting Diode
LNA Low Noise Amplifier
MAX MAXimum
Q2686 Wireless CPU®
MIC MICrophone
MIN MINimum
MMS Multimedia Message Service
MO Mobile Originated
MT Mobile Terminated
na Not Applicable
NF Noise Factor
NMEA National Marine Electronics Association
NOM NOMinal
NTC Negative Temperature Coefficient
PA Power Amplifier
Pa Pascal (for speaker sound pressure measurements)
PBCCH Packet Broadcast Control CHannel
PC Personal Computer
PCB Printed Circuit Board
PDA Personal Digital Assistant
PFM Power Frequency Modulation
PSM Phase Shift Modulation
PWM Pulse Width Modulation
RAM Random Access Memory
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Q2686 Wireless CPU®
Abbreviation
Definition
RF Radio Frequency
RFI Radio Frequency Interference
RHCP Right Hand Circular Polarization
RI Ring Indicator
RST ReSeT
RTC Real Time Clock
RTCM Radio Technical Commission for Maritime services
RTS Request To Send
RX Receive
SCL Serial CLock
SDA Serial DAta
SIM Subscriber Identification Module
SMS Short Message Service
SPI Serial Peripheral Interface
SPL Sound Pressure Level
SPK SPeaKer
SRAM Static RAM
TBC To Be Confirmed
TDMA Time Division Multiple Access
TP Test Point
TVS Transient Voltage Suppressor
TX Transmit
TYP TYPical
UART Universal Asynchronous Receiver-Transmitter
USB Universal Serial Bus
USSD Unstructured Supplementary Services Data
VSWR Voltage Standing Wave Ratio
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2 General Description
2.1 General Information
Q2686 Wireless CPU®
The Q2686 series is a self-contained E-GSM/GPRS 900/1800 and 850/1900
quad-band Wireless CPU
®
with the following characteristics:
2.1.1 Overall Dimensions
• Length: 40 mm
• Width: 32.2 mm
• Thickness: 4 mm
2.1.2 Environment and Mechanics
• Green policy: RoHS compliant
• Complete shielding
The Q2686 Wireless CPU
®
is compliant with RoHS (Restriction of Hazardous
Substances in Electrical and Electronic Equipment) Directive 2002/95/EC which
sets limits for the use of certain restricted hazardous substances. This directive
states that “from 1st July 2006, new electrical and electronic equipment put
on the market does not contain lead, mercury, cadmium, hexavalent
chromium, polybrominated biphenyls (PBB), and polybrominated diphenyl
ethers (PBDE)”.
®
The Wireless CPU
s which are compliant with this
directive are identified by the RoHs logo on their label.
2.1.3 GSM/GPRS Features
• 2-Watt EGSM 900/GSM 850 radio section running under 3.6 volts
• 1-Watt GSM1800/1900 radio section running under 3.6 volts
• Hardware GPRS class 10 capable
2.1.4 Interfaces
• Digital section running under 2.8 volts and 1.8V.
• 3V/1V8 SIM interface
• Complete interfacing:
o Power supply
o Serial link
o Analog audio
o PCM digital audio
o SIM card
o Keyboard
o USB 2.0 slave
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written agreement.
WM_PRJ_Q2686_PTS_001-010 June 30, 2009
o Serial LCD (not available with AT commands)
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2.1.5 Operating System
• Real Time Clock (RTC) with calendar
• Battery charger
• Echo cancellation + noise reduction (quadri codec)
• Full GSM or GSM/GPRS Operating System stack
2.1.6 Connection Interfaces
The Q2686 Wireless CPU
®
has four external connections:
• Three for RF circuit:
o UFL connector
o Soldered connection
o IMP connection
• One for baseband signals:
o 100 pin I/O connector.
Q2686 Wireless CPU®
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Q2686 Wireless CPU®
ADC
Q
2.2 Functional Architecture
The global architecture of the Q2686 Wireless CPU® is displayed below:
2
6
8
6
B
O
A
R
D
T
O
B
O
A
R
D
I
N
T
E
R
F
A
C
E
C
O
N
N
E
C
T
O
R
CHARGER
AUDIO FILTER
USB detection
SUPPLY INTERFACE
POWER
AUDIO
KEYPAD
PCM
UART2
UART1
USB
SIM 1.8V/3V
RTC
MEMORY
FLASH / SRAM
INTERFACE
EXT_IT
RF
SPI1
SPI2
I2C
GPIO
DAC
EBI
RF
TRANSCEIVER
RF
FRONT END
ANTENNA
COAX
UFL
IMP
Figure 1: Functional architecture
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Q2686 Wireless CPU®
2.2.1 RF Functionalities
The Radio Frequency (RF) range complies with the Phase II EGSM 900/DCS
1800 and GSM 850/PCS 1900 recommendations. The frequencies are:
Transmit band (Tx) Receive band (Rx)
GSM 850 824 to 849 MHz 869 to 894 MHz
E-GSM 900 880 to 915 MHz 925 to 960 MHz
DCS 1800 1710 to 1785 MHz 1805 to 1880 MHz
PCS 1900 1850 to 1910 MHz 1930 to 1990 MHz
The Radio Frequency (RF) part is based on a specific quad-band chip with a:
• Digital low-IF receiver
• Quad-band LNA (Low Noise Amplifier)
• Offset PLL (Phase Locked Loop) transmitter
• Frequency synthesizer
• Digitally controlled crystal oscillator (DCXO)
• Tx/Rx FEM ( Front-End Wireless CPU
®
) for quad-band GSM/GPRS
2.2.2 Baseband Functionalities
The digital part of the Q2686 Wireless CPU
®
is composed of a PCF5212
PHILIPS chip. This chipset uses a 0.18 μm CMOS mixed technology, which
allows massive integration as well as low current consumption.
2.3 Operating System
The Q2686 Wireless CPU® is designed to integrate various types of specific
process applications such as vertical applications (telemetry, multimedia,
automotive).
The Operating System offers a set of AT commands to control the Wireless
®
. With this standard Operating System, some interfaces of the Wireless
CPU
CPU® are not available because they are dependent on the peripheral devices
connected to the Wireless CPU
The Operating System is Open AT
®
.
®
compliant.
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3 Interfaces
3.1 General Purpose Connector (GPC)
Q2686 Wireless CPU®
A 100-pin connector is provided to interface the Q2686 Wireless CPU® with a
board containing either a serial LCD Wireless CPU
®
, a keyboard, a SIM
connector, or a battery connection.
The available interfaces on the GPC are described below:
Chapter Name
3.4 Serial Interface X
3.5 Keyboard Interface X X
3.6 Main Serial Link X X
3.7 Auxiliary Serial Link X X
3.8 SIM Interface X X
3.9 General Purpose IO X X
3.10 Analog to Digital
Converter
3.11 Analog Audio
Interface
3.12 Buzzer Output X X
3.13 Battery Charging
Interface
3.17 External Interruption X X
3.18 VCC_2V8 and
VCC_1V8
3.19 BAT-RTC (Backup
Battery)
3.20 LED0 signal X X
3.21 Digital Audio Interface
(PCM)
3.22 USB 2.0 Interface X X
Driven by
AT
commands
X X
X X
X X
X
Driven by
Open AT®
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Q2686 Wireless CPU®
3.2 Power Supply
3.2.1 Power Supply Description
The power supply is one of the key issues in the design of a GSM terminal.
Due to the burst emission mode used in GSM/GPRS, the power supply must be
able to deliver high current peaks in a short time. During the peaks, the ripple
) on the supply voltage must not exceed a certain limit (see Table 1 Power
(U
ripp
supply voltage ).
• In communication mode, a GSM/GPRS class 2 terminal emits 577μs
radio bursts every 4.615ms (see
VBATTT
Figure 2).
Uripp
t = 577 μs
T = 4,615 ms
Uripp
Figure 2: Power supply during burst emission
• In communication mode, a GPRS class 10 terminal emits 1154μs radio
bursts every 4.615ms.
Only the VBATT input is necessary to supply the Q2686 Wireless CPU
®
.
VBATT:
• Directly supplies the RF components with 3.6 V. It is essential to keep a
minimum voltage ripple at this connection in order to avoid any phase
error.
The RF Power Amplifier current (1.5 A peak in GSM /GPRS mode) flows
with a ratio of:
o 1/8 of the time (around 577μs every 4.615ms for GSM /GPRS cl. 2)
and
o 2/8 of the time (around 1154μs every 4.615ms for GSM /GPRS
cl. 10).
The rising time is around 10μs.
• Is internally used to provide, via several regulators, the VCC_2V8 and
VCC_1V8 power supply required for the baseband signals.
®
The Q2686 Wireless CPU
shielding case is the grounding. The ground must
be connected to the motherboard through a complete layer on the PCB.
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Q2686 Wireless CPU®
V
VBATT
1,2
3.2 3.6 4.8
V
MIN
V
NOM
MAX
Table 1 Power supply voltage
(1): This value must be guarantied during the burst (with 1.5A Peak in GSM or GPRS mode)
(2): Max operating Voltage Stationary Wave Ratio (VSWR) 2:1
®
When the Wireless CPU
is supplied with a battery, the total impedance
(battery + protections + PCB) should be < 150 mΩ.
As the radio power amplifier is directly connected to VBATT, the Wireless CPU
®
is sensitive to any Alternative Current on lines. When a DC/DC converter is
used, Wavecom recommends setting the converter frequency in such a way
that the resulting voltage does not exceed the values in following table.
Freq.
(kHz)
U
Max
ripp
(mVpp)
<10 300
10 ≤ f ≤ 200
40
> 200 10
Table 2 Maximum voltage ripple (Uripp) vs Frequency
When the Wireless CPU
any pin of the 100-pin connector, except on Vbatt (pins 1 to 4) ,BAT-RTC (pin
7) for RTC operation or ON/~OFF (pin 19) to power-ON the Wireless CPU
®
is in Alarm/Off mode, no voltage has to be applied on
®
.
3.2.2 Power Consumption
Power consumption is dependent on the configuration used. It is for this
reason that the following consumption values are given for each mode, RF
band and type of software used (AT or Open AT
®
).
All the following information is given assuming a 50 Ω RF output.
The following consumption values were obtained by performing measurements
on the Wireless CPU
Three VBATT values are used to measure the consumption, VBATT
VBATT
(4.8V) and VBATT
MAX
®
samples at a temperature of 25° C.
(3.6V).
TYP
(3.2V),
MIN
The average current is given for the three VBATT values and the peak current
given is the maximum current peak measured with the three VBATT voltages.
For a more detailed description of the operating modes, see the appendix of the
AT Command User Guide
For more information on the consumption measurement procedure, see Q2686
Wireless CPU
®
Customer Design Guidelines [10].
[7].
First let’s define start-up current in view to avoid start issues.
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Q2686 Wireless CPU®
3.2.2.1 Start-up Current
The start-up current is defined as follow:
During the first second following the Power on, a peak of current appears :
This peak of current is called “I
current “ and has a duration of about 161
startup
ms (Typical) .
Figure 3 shows the waveform of current and localizes the peak considered as
the start-up current.
Figure 3: Start-up current waveform
In this condition, we can consider the following results:
25°C 3.2 V 3.6 V 4.8 V
I
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written agreement.
WM_PRJ_Q2686_PTS_001-010 June 30, 2009
88 mA 80 mA 64 mA
Start-up
Page: 24 / 97
Q2686 Wireless CPU®
3.2.2.2 Power Consumption without Open AT
The following measurement results are relevant when:
®
• there is no Open AT
• Open AT
®
application is disabled
application
• no processing is required by the Open AT
Power consumption without Open AT® processing
Operating mode Parameters
Alarm Mode
Fast Idle Mode
Paging 9 (Rx burst occurrence ~2s) 32.6 39.7 43.2 154 RX mA
Paging 2 (Rx burst occurrence ~0,5s) 33.6 40.7 44.2 156
Paging 9 (Rx burst occurrence ~2s) 1.9 2.1 2.3 155 RX mA
Slow Idle Mode 1
Paging 2 (Rx burst occurrence ~0,5s) 5 5.7 6 158
Fast Standby Mode
Slow Standby Mode
average
VBATT=4,8V
®
Processing
®
application
I
NOM
I
NOM
average
VBATT=3,6V
I
NOM
average
VBATT=3,2V
I
MAX
peak
unit
21 16 15 µA
mA
RX
mA
RX
33.5 40.8 44.1 51 mA
0.37 0.38 0.43 49.9 mA
850/900 MHz
Connected Mode
PCL5 (TX power 33dBm) 209 217 222 1462 TX mA
PCL19 (TX power 5dBm) 85.6 93.8 98 257 TX mA
PCL0 (TX power 30dBm) 153 162 166 894 TX mA
1800/1900 MHz
PCL15 (TX power 0dBm) 82 89 94 225
850/900 MHz
Transfer Mode
class 8 (4Rx/1Tx)
gam. 3(TX power 33dBm) 198.2 206.5 211.5 1428 TX mA
gam.17(TX power 5dBm) 80 88 91 226
gam.3(TX power 30dBm) 145 153 158 870TX mA
1800/1900 MHz
gam.18(TX power 0dBm) 77 85 88 206
850/900 MHz
Transfer Mode
class 10 (3Rx/2Tx)
gam.3 (TX power 33dBm) 357 366.5 373 1426 TX mA
gam.17 (TX power 5dBm) 114 123 125 248
gam.3 (TX power 30dBm) 248 257 263 878TX mA
1800/1900 MHz
gam.18 (TX power 0dBm) 108 117 121 229
means that the current peak is the RF transmission burst (Tx burst)
TX
means that the current peak is the RF reception burst (Rx burst)
RX
1
Slow Idle Mode consumption is dependent on the SIM card used. Some SIM cards respond faster
than others, the longer the response time, the higher the consumption. The measurements were
performed with a large number of 3V SIM cards, the results in brackets are the minimum and
maximum currents measured from among all the SIMs used
.
mA
TX
mA
TX
mA
TX
mA
TX
mA
TX
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Q2686 Wireless CPU®
®
3.2.2.3 Power Consumption with Open AT
Software
The Open AT™ software used is the Full CPU Load application, the following
consumption results are measured during the run of the Full CPU Load
application.
The two tables are respectively for the CPU clock programmed at 26 MHz and
104 MHz.
Power consumption with Full CPU load Open AT® application CPU@26MHz
I
Working mode Parameters
NOM
average
VBATT=4,8V
I
NOM
average
VBATT=3,6V
I
NOM
average
VBATT=3,2V
I
MAX
peak
unit
Alarm Mode
Fast Idle Mode
Slow Idle Mode
Fast Standby Mode
Slow Standby Mode
Connected Mode
Transfer
Mode
class 8
(4Rx/1Tx)
GPRS
Transfer
Mode
class 10
(3Rx/2Tx)
N/A* N/A* N/A* N/A*
Paging 9 (Rx burst occurrence ~2s)
32 38 43 194
Paging 2 (Rx burst occurrence ~0,5s) 33 39 44 196
mA
RX
mA
RX
Paging 9 (Rx burst occurrence ~2s) N/A* N/A* N/A* N/A*
Paging 2 (Rx burst occurrence ~0,5s) N/A* N/A* N/A* N/A*
33 38 44 50 mA
N/A* N/A* N/A* N/A*
850/900 MHz
1800/1900 MHz
850/900 MHz
PCL5 (TX power 33dBm) 210 220 223 1390
PCL19 (TX power 5dBm) 86 92 95 270
PCL0 (TX power 30dBm) 154 162 167 888
PCL15 (TX power 0dBm) 80 88 92 241
Gam.3 (TX power
33dBm)
Gam.17 (TX power
5dBm)
Gam.3 (TX power
30dBm)
199 207 212 1450
80 88 92 249
147 152 159 860
mA
TX
mA
TX
mA
TX
mA
TX
mA
TX
mA
TX
mA
TX
1800/1900 MHz
850/900 MHz
Gam.18 (TX power
0dBm)
Gam.3 (TX power
33dBm)
Gam.17 (TX power
5dBm)
Gam.3 (TX power
30dBm)
77 85 89 221
357 367 374 1462
115 123 127 275
252 260 266 870
mA
TX
mA
TX
mA
TX
mA
TX
1800/1900 MHz
Gam.18 (TX power
0dBm)
109 117 121 249
mA
TX
means that the current peak is the RF transmission burst (Tx burst)
TX
means that the current peak is the RF reception burst (Rx burst)
RX
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Q2686 Wireless CPU®
* N/A: That doesn’t mean that no Open AT® application is possible in this specific mode. That
means that the specific Full CPU load Open AT
a worst case for the consumption measurement).
®
application can’t allow this specific mode. (This is
Power consumption with Full CPU load Open AT® application CPU@104MHz
I
Working mode Parameters
NOM
average
VBATT=4,8V
I
NOM
average
VBATT=3,6V
I
NOM
average
VBATT=3,2V
I
MAX
peak
unit
Alarm Mode
Fast Idle Mode
Slow Idle Mode
Fast Standby Mode
Slow Standby Mode
Connected Mode
Transfer
Mode
class 8
(4Rx/1Tx)
GPRS
Transfer
Mode
class 10
(3Rx/2Tx)
N/A* N/A* N/A* N/A*
Paging 9 (Rx burst occurrence ~2s)
51 62 68 220
Paging 2 (Rx burst occurrence ~0,5s) 52 63 69 220
mA
RX
mA
RX
Paging 9 (Rx burst occurrence ~2s) N/A* N/A* N/A* N/A*
Paging 2 (Rx burst occurrence ~0,5s) N/A* N/A* N/A* N/A*
49 63 69 150 mA
N/A* N/A* N/A* N/A*
850/900 MHz
1800/1900 MHz
850/900 MHz
PCL5 (TX power 33dBm) 210 220 230 1385
PCL19 (TX power 5dBm) 84 94 104 290
PCL0 (TX power 30dBm) 155 163 169 880
PCL15 (TX power 0dBm) 89 102 109 270
Gam.3 (TX power
33dBm)
Gam.17 (TX power
5dBm)
Gam.3 (TX power
30dBm)
225 243 252 1509
107 126 133 306
175 190 198 912
mA
TX
mA
TX
mA
TX
mA
TX
mA
TX
mA
TX
mA
TX
1800/1900 MHz
850/900 MHz
Gam.18 (TX power
0dBm)
Gam.3 (TX power
33dBm)
Gam.17 (TX power
5dBm)
Gam.3 (TX power
30dBm)
104 120 129 284
385 403 414 1532
142 159 167 385
271 288 301 949
mA
TX
mA
TX
mA
TX
mA
TX
1800/1900 MHz
Gam.18 (TX power
0dBm)
136 153 161 341
mA
TX
means that the current peak is the RF transmission burst (Tx burst)
TX
means that the current peak is the RF reception burst (Rx burst)
RX
* N/A: That doesn’t mean that no Open AT
means that the specific Full CPU load Open AT
a worst case for the consumption measurement).
®
application is possible in this specific mode. That
®
application can’t allow this specific mode. (This is
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3.2.2.4 Consumption Waveform Samples
Q2686 Wireless CPU®
The consumption waveforms are given for a EGSM900 network configuration
with AT software running on the Q2686 Wireless CPU
®
/Open AT® Software
Suite v2.
The VBATT voltage is at the typical value of 3.6V.
Four significant operating mode consumption waveforms are described:
• Connected Mode (PCL5: Tx power 33dBm)
• Slow Idle mode (Paging 9)
• Fast idle mode (Paging 9)
• Transfer mode (GPRS class 10, PCL3: Tx power 33dBm )
The following waveform shows only the form of the current, for correct current
values, see sections
3.2.2.4.1 Connected Mode Current Waveform
3.2.2.2 and 3.2.2.3.
Connected mode 33dBm
Current(A) / Time (s)
1.6
TX PEAK
1.4
1.2
1
0.8
0.6
0.4
0.2
0
0
0
.
0
0
0
.
0
0
2
4
0
.
0
0
6
0
.
0
0
8
0
.
0
1
0
.
0
1
2
0
.
0
1
4
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3.2.2.4.2 Slow Idle Mode Current Waveform
Slow Idle mode Paging ~2s
Current(A) / Time (s)
Q2686 Wireless CPU®
0.16
RX PEAK
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
0
1
2
3
-0.02
3.2.2.4.3 Fast Idle Mode Current Waveform
Fast Idle mode Paging ~2s
Current(A) / Time (s)
4
5
6
7
0.16
RX PEAK
0.14
0.12
0.1
0.08
0.06
0.04
0.02
0
0
1
2
3
4
5
6
7
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