WA_DEV_W218_PTS_002
006
April 29, 2010
AirPrime WISMO218
Product Technical Specification
& Customer Design Guidelines
Product Technical Specification &
Customer Design Guidelines
Important Notice
Due to the nature of wireless communications, transmission and reception of data can never be
guaranteed. Data may be delayed, corrupted (i.e., have errors) or be totally lost. Although significant
delays or losses of data are rare when wireless devices such as the Sierra Wireless modem are used
in a normal manner with a well-constructed network, the Sierra Wireless modem should not be used
in situations where failure to transmit or receive data could result in damage of any kind to the user or
any other party, including but not limited to personal injury, death, or loss of property. Sierra Wireless
accepts no responsibility for damages of any kind resulting from delays or errors in data transmitted or
received using the Sierra Wireless modem, or for failure of the Sierra Wireless modem to transmit or
receive such data.
Safety and Hazards
Do not operate the Sierra Wireless modem in areas where blasting is in progress, where explosive
atmospheres may be present, near medical equipment, near life support equipment, or any equipment
which may be susceptible to any form of radio interference. In such areas, the Sierra Wireless modem
MUST BE POWERED OFF. The Sierra Wireless modem can transmit signals that could interfere with
this equipment. Do not operate the Sierra Wireless modem in any aircraft, whether the aircraft is on
the ground or in flight. In aircraft, the Sierra Wireless modem MUST BE POWERED OFF. When
operating, the Sierra Wireless modem can transmit signals that could interfere with various onboard
systems.
Note: Some airlines may permit the use of cellular phones while the aircraft is on the ground and the door is
open. Sierra Wireless modems may be used at this time.
The driver or operator of any vehicle should not operate the Sierra Wireless modem while in control of
a vehicle. Doing so will detract from the driver or operator’s control and operation of that vehicle. In
some states and provinces, operating such communications devices while in control of a vehicle is an
offence.
Limitations of Liability
This manual is provided “as is”. Sierra Wireless 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 manual shall endorse all risks arising from its use.
The information in this manual is subject to change without notice and does not represent a
commitment on the part of Sierra Wireless. SIERRA WIRELESS AND ITS AFFILIATES
SPECIFICALLY DISCLAIM LIABILITY FOR ANY AND ALL DIRECT, INDIRECT, SPECIAL,
GENERAL, INCIDENTAL, CONSEQUENTIAL, PUNITIVE OR EXEMPLARY DAMAGES INCLUDING,
BUT NOT LIMITED TO, LOSS OF PROFITS OR REVENUE OR ANTICIPATED PROFITS OR
REVENUE ARISING OUT OF THE USE OR INABILITY TO USE ANY SIERRA WIRELESS
PRODUCT, EVEN IF SIERRA WIRELESS AND/OR ITS AFFILIATES HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES OR THEY ARE FORESEEABLE OR FOR CLAIMS BY ANY
THIRD PARTY.
Notwithstanding the foregoing, in no event shall Sierra Wireless and/or its affiliates aggregate liability
arising under or in connection with the Sierra Wireless product, regardless of the number of events,
occurrences, or claims giving rise to liability, be in excess of the price paid by the purchaser for the
Sierra Wireless product.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 2
Product Technical Specification &
Customer Design Guidelines
5,515,013
5,629,960
5,845,216
5,847,553
5,878,234
5,890,057
5,929,815
6,169,884
6,191,741
6,199,168
6,339,405
6,359,591
6,400,336
6,516,204
6,561,851
6,643,501
6,653,979
6,697,030
6,785,830
6,845,249
6,847,830
6,876,697
6,879,585
6,886,049
6,968,171
6,985,757
7,023,878
7,053,843
7,106,569
7,145,267
7,200,512
7,295,171
7,287,162
D442,170
D459,303
D599,256
D560,911
Sales Desk:
Phone:
1-604-232-1488
Hours:
8:00 AM to 5:00 PM Pacific Time
E-mail:
sales@sierrawireless.com
Post:
Sierra Wireless
13811 Wireless Way
Richmond, BC
Canada V6V 3A4
Fax:
1-604-231-1109
Web:
www.sierrawireless.com
Patents
Portions of this product may be covered by some or all of the following US patents:
and other patents pending.
This product includes technology licensed from QUALCOMM
®
3G
Manufactured or sold by Sierra Wireless or its licensees under one or more patents licensed from
InterDigital Group.
Copyright
© 2010 Sierra Wireless. All rights reserved.
Trademarks
AirCard® and Watcher® are registered trademarks of Sierra Wireless. Sierra WirelessTM, AirPrime™,
AirLink™, AirVantage™ and the Sierra Wireless logo are trademarks of Sierra Wireless.
, , ®, inSIM®, WAVECOM®, WISMO®, Wireless Microprocessor®,
Wireless CPU®, Open AT® are filed or registered trademarks of Sierra Wireless S.A. in France and/or
in other countries.
Windows
®
and Windows Vista® are registered trademarks of Microsoft Corporation.
Macintosh and Mac OS are registered trademarks of Apple Inc., registered in the U.S. and other
countries.
QUALCOMM
®
is a registered trademark of QUALCOMM Incorporated. Used under license.
Other trademarks are the property of the respective owners.
Contact Information
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 3
Product Technical Specification &
Customer Design Guidelines
Version
Date
Updates
001
April 22, 2009
Creation
002
April 28, 2009
Addition of Power Consumption table and software note in section 3.3.2
003
July 17, 2009
Document Cover/Footer: Updated the file name (from
WA_DEV_W218_PTS_002-002 to WA_DEV_W218_PTS_002-003), the
revision number and the revision date.
Throughout the document: adjusted figure size to better display
components and their corresponding values.
§ 1.1.1: Updated the 4th reference document name to Customer Process
Guideline for WISMO Series.
§ 3.5: Changed the section title to “SPI Bus for Debug Trace ONLY”.
§ 3.5.1:
Changed the SPI-CLK Pin number from 16 to 15
Added an additional sentence at the end of the paragraph text
§ 3.5.1.1: Changed the value of X101 from 3.6884MHz to 3,6864MHz.
§ 3.11.2: Changed the PWM1 Pin number from 27 to 35.
§ 3.12.3: Updated the section description.
§ 5.2.2: Changed the Recommended connection when not used column
for Pin 18, TX_CTRL from “2.8V TX Burst Indicator” to “not connected”.
§ 5.4: Updated the description for Class B condition.
§ 5.5.2:
Updated the section description
Deleted Figure 40: Recommended PCB landing pattern for WISMO218
§ 5.5.3: Added this section.
Made grammatical and other punctuation corrections throughout the
document.
Updated links and references.
§ 3.8: Changed the number of General Purpose I/Os from 11 to 3.
§ 3.9.2 Added a Caution box after the table.
§ 3.10.4.1.1 and 3.104.1.2: Removed the GND within the WISMO218 in
the figures (figures 15, 16, 17 and 18)
§ 3.10.5.5: Added additional information in the Caution box regarding the
ESD sensitivity of the audio interface.
§ 5.2.2: Changed the recommended connection when not in use value
from “open” to “Ground” for pin #5, AUX-ADC0.
§ 3.10.5.5:
Separated the audio track figure and the differential connection figure
Labeled the differential connection figure as Figure 21
Added Figure 22: single-ended audio connection
§ 5.4: Updated the Class B temperature range from -30 to +75 to -40 to
+85.
Consult our website for up-to-date product descriptions, documentation, application notes, firmware
upgrades, troubleshooting tips, and press releases: www.sierrawireless.com
Document History
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 4
Product Technical Specification &
Customer Design Guidelines
Version
Date
Updates
§ 5.5.3: Updated the figure to display it rotated 90 degrees
counterclockwise.
Updated text wording, checked for spelling and grammar, updated links
and captions throughout the document.
§ 3.2.2: Updated the value of VBATT’s Ripple max.
§ 3.10.1.1: Updated table values.
§ 3.10.2.1.1: Updated table values.
§ 3.10.4.1.1: Deleted the description for Z2.
§ 3.13.3.1: Changed “de-assert” to “release” (re: recommendation for the
ON/~OFF signal)
§ 3.14: Updated reference to section 3.13.3.1.
§ 4.1.4: Updated Caution text.
§ 3.10.1: Updated the DC equivalent circuit.
§ 3.10.1.1: Updated the table values and notes section.
§ 3.10.4.1.1 and 3.10.4.1.2: Updated figures from 2.85V to 2.4V
§ 3.13.3.1: Updated figure and included the T
ready
table just beneath the
figure.
§ 3.17.3: Updated figure and updated descriptive text below the figure.
§ 3.13.3.1: Updated the figure to include ramp up time of VBAT.
August 12, 2009
Updated the Pin Description table (Table 7) of the Main Serial Link
(UART) subsection of section 3: Interfaces.
Added List of Figures and List of Tables.
September 10, 2009
Updated Figure 31.
Added T
rampup
values in the Power on sequence table.
Added Figure 46.
Moved Recommended PCB Landing Pattern after Figure 47.
004
October 27, 2009
Updated Class A Operating Temperature Range
Updated documentation reference
005
November 23, 2009
ON/~OFF Signal:
Added an extra note about controlling the signal via an open collector
switching transistor
Updated Figure 30 to include a figure showing the signal connection
via an open collector transistor
Set the low level pulse length to 5.5sec
Updated Figure 32 to include the 5.5s low level pulse length
TX_CTRL Signal for TX Burst Indication:
Added TX_CTRL frequency and duration
Updated Figure 36 to include T
duration
Updated Figure 37 (added the transistor, T601)
006
January 20, 2010
Added additional information regarding the use of AT+PSSLEEP=1.
April 29, 2010
Power Consumption:
Specified that power consumption values are typical
Deleted Alarm Mode and updated Off Mode
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 5
Product Technical Specification &
Customer Design Guidelines
Version
Date
Updates
Updated document template.
Updated section 8 Certification Compliance and Recommended
Standards.
Updated Figure 46 Castellation Pin Dimension and Location.
Updated section 3.18 Reset.
Updated section 3.2.4.1 Recommended Components.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 6
Contents
IMPORTANT NOTICE ............................................................................................... 2
CONTENTS ............................................................................................................... 7
LIST OF FIGURES................................................................................................... 11
LIST OF TABLES .................................................................................................... 13
1. REFERENCES ................................................................................................... 15
1.1. Reference Documents ................................................................................................ 15
1.1.1. Sierra Wireless Reference Documentation ........................................................... 15
1.2. List of Abbreviations ................................................................................................... 15
2. GENERAL DESCRIPTION ................................................................................. 19
2.1. General Information .................................................................................................... 19
2.1.1. Overall Dimensions .............................................................................................. 19
2.1.2. Environment and Mechanics ................................................................................ 19
2.1.3. GSM/GPRS Features .......................................................................................... 19
2.1.4. Interfaces............................................................................................................. 19
2.1.5. Firmware ............................................................................................................. 20
2.1.6. Connection Interfaces .......................................................................................... 20
2.2. Functional Description ................................................................................................ 21
2.2.1. RF Functionalities ................................................................................................ 22
2.2.2. Baseband Functionalities ..................................................................................... 22
3. INTERFACES ..................................................................................................... 23
3.1. General Interfaces ...................................................................................................... 23
3.2. Power Supply ............................................................................................................. 24
3.2.1. Power Supply Description .................................................................................... 24
3.2.2. Electrical Characteristics ...................................................................................... 25
3.2.3. Pin Description .................................................................................................... 25
3.2.4. Application ........................................................................................................... 25
3.2.4.1. Recommended Components .................................................................................... 26
3.3. Power Consumption ................................................................................................... 27
3.3.1. Various Operating Modes .................................................................................... 27
3.3.2. Power Consumption............................................................................................. 28
3.3.3. Consumption Waveform Samples ........................................................................ 29
3.3.3.1. Connected Mode Current Waveform ........................................................................ 30
3.3.3.2. Transfer Mode Class 10 Current Waveform .............................................................. 30
3.3.3.3. Idle Mode Page 2 Current Waveform ....................................................................... 31
3.3.3.4. Idle Mode Page 9 Current Waveform ....................................................................... 31
3.3.4. Recommendations for Less Consumption ............................................................ 32
3.4. Electrical Information for Digital I/O ............................................................................. 33
3.5. SPI Bus for Debug Trace ONLY .................................................................................. 34
3.5.1. Pin Description .................................................................................................... 34
3.5.1.1. SPI Waveforms ....................................................................................................... 34
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 7
Product Technical Specification &
Customer Design Guidelines
3.6. Main Serial Link (UART) ............................................................................................. 37
3.6.1. Features .............................................................................................................. 37
3.6.2. Pin Description .................................................................................................... 37
3.6.2.1. 5-wire Serial Interface Hardware Design................................................................... 38
3.6.2.2. 4-wire Serial Interface Hardware Design................................................................... 38
3.6.2.3. 2-wire Serial Interface Hardware Design................................................................... 38
3.6.3. Application ........................................................................................................... 38
3.6.3.1. V24/CMOS Possible Design .................................................................................... 40
3.7. SIM Interface .............................................................................................................. 42
3.7.1. Features .............................................................................................................. 42
3.7.2. Pin Description .................................................................................................... 43
3.7.3. Application ........................................................................................................... 44
3.7.3.1. SIM Socket Connection ........................................................................................... 44
3.8. General Purpose Input/Output .................................................................................... 45
3.8.1. Pin Description .................................................................................................... 45
3.9. Analog to Digital Converter ......................................................................................... 46
3.9.1. Features .............................................................................................................. 46
3.9.2. Pin Description .................................................................................................... 46
3.10. Analog Audio Interface................................................................................................ 47
3.10.1. Microphone Features ........................................................................................... 47
3.10.1.1. Electrical Characteristics ........................................................................................ 47
3.10.2. Speaker Features ................................................................................................ 48
3.10.2.1. Speakers Outputs Power ....................................................................................... 48
3.10.3. Pin Description .................................................................................................... 49
3.10.4. Application ........................................................................................................... 49
3.10.4.1. Microphone ........................................................................................................... 49
3.10.4.2. Speaker SPKP and SPKN ..................................................................................... 52
3.10.5. Design Recommendation ..................................................................................... 53
3.10.5.1. General ................................................................................................................. 53
3.10.5.2. Recommended Microphone Characteristics ............................................................ 53
3.10.5.3. Recommended Speaker Characteristics ................................................................. 54
3.10.5.4. Recommended Filtering Components ..................................................................... 54
3.10.5.5. Audio Track and PCB Layout Recommendation ..................................................... 56
3.11. Pulse-Width Modulators (PWMs) ................................................................................ 58
3.11.1. Features .............................................................................................................. 58
3.11.2. Pin Description .................................................................................................... 58
3.11.3. Application ........................................................................................................... 58
3.12. BUZZER Output ......................................................................................................... 60
3.12.1. Features .............................................................................................................. 60
3.12.2. Pin Description .................................................................................................... 60
3.12.3. Application ........................................................................................................... 60
3.12.3.1. Calculations of the Low Filter ................................................................................. 62
3.12.3.2. Recommended Characteristics for the Buzzer ........................................................ 62
3.13. ON/~OFF Signal ......................................................................................................... 63
3.13.1. Features .............................................................................................................. 63
3.13.2. Pin Description .................................................................................................... 63
3.13.3. Application ........................................................................................................... 64
3.13.3.1. Power ON ............................................................................................................. 64
3.13.3.2. Power OFF ............................................................................................................ 66
3.14. WISMO_READY Indication ......................................................................................... 67
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 8
Product Technical Specification &
Customer Design Guidelines
3.14.1. Features .............................................................................................................. 67
3.14.2. Pin Description .................................................................................................... 67
3.15. VCC_2V8 Output ........................................................................................................ 68
3.15.1. Features .............................................................................................................. 68
3.15.2. Pin Description .................................................................................................... 68
3.15.3. Application ........................................................................................................... 68
3.16. BAT-RTC (Backup Battery) ......................................................................................... 69
3.16.1. Features .............................................................................................................. 69
3.16.2. Pin Description .................................................................................................... 69
3.16.3. Application ........................................................................................................... 69
3.16.3.1. Super Capacitor .................................................................................................... 70
3.16.3.2. Non-Rechargeable Battery ..................................................................................... 70
3.16.3.3. Rechargeable Battery Cell ..................................................................................... 71
3.17. TX_CTRL Signal for TX Burst Indication ..................................................................... 72
3.17.1. Features .............................................................................................................. 72
3.17.2. Pin Description .................................................................................................... 73
3.17.3. Application ........................................................................................................... 73
3.18. Reset .......................................................................................................................... 74
3.18.1. Feature ................................................................................................................ 74
3.18.1.1. Sequence After an External Reset Event (~RESET) ............................................... 74
3.18.2. Pin Description .................................................................................................... 74
3.18.3. Application ........................................................................................................... 75
3.19. RF Interface ................................................................................................................ 76
3.19.1. RF Connection ..................................................................................................... 76
3.19.2. RF Performances ................................................................................................. 76
3.19.3. Antenna Specifications ........................................................................................ 76
4. CONSUMPTION MEASUREMENT PROCEDURE ............................................ 78
4.1. Hardware Configuration .............................................................................................. 78
4.1.1. Equipment ........................................................................................................... 78
4.1.2. AirPrime WS Series Development Kit ................................................................... 80
4.1.3. Socket-Up Board Used ........................................................................................ 80
4.1.4. SIM Cards Used .................................................................................................. 81
4.2. Software Configurations .............................................................................................. 82
4.2.1. AirPrime WISMO218 Configuration ...................................................................... 82
4.2.2. Equipment Configuration...................................................................................... 83
4.3. Template .................................................................................................................... 84
5. TECHNICAL SPECIFICATIONS ........................................................................ 85
5.1. Castellation Connector Pin Configuration .................................................................... 85
5.2. Castellation Pin ........................................................................................................... 86
5.2.1. Pin-Out Description .............................................................................................. 86
5.2.2. Recommended Connection When Not Used ........................................................ 87
5.3. PCB Specification for Application Board ...................................................................... 88
5.4. Reliability Compliance and Recommended Standards................................................. 89
5.4.1. Reliability Compliance .......................................................................................... 89
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 9
Product Technical Specification &
Customer Design Guidelines
5.4.2. Applicable Standards Listing ................................................................................ 89
5.4.3. Environmental Specifications ............................................................................... 90
5.4.3.1. Function Status Classification .................................................................................. 90
5.5. Mechanical Specifications ........................................................................................... 92
5.5.1. Physical Characteristics ....................................................................................... 92
5.5.2. AirPrime WISMO218 Dimensions ........................................................................ 93
5.5.3. Recommended PCB Landing Pattern ................................................................... 94
6. PERIPHERAL DEVICES REFERENCES ........................................................... 95
6.1. General Purpose Connector ....................................................................................... 95
6.2. SIM Card Reader ........................................................................................................ 95
6.3. Microphone................................................................................................................. 95
6.4. Speaker ...................................................................................................................... 95
6.5. Antenna Cable ............................................................................................................ 96
6.6. GSM Antenna ............................................................................................................. 96
7. NOISES AND DESIGN ....................................................................................... 97
7.1. EMC Recommendations ............................................................................................. 97
7.2. Power Supply ............................................................................................................. 97
8. CERTIFICATION COMPLIANCE AND RECOMMENDED STANDARDS ......... 98
8.1. Certification Compliance ............................................................................................. 98
8.2. Applicable Standards Listing ....................................................................................... 98
9. APPENDIX ....................................................................................................... 100
9.1. Safety Recommendations (for Information Only) ....................................................... 100
9.1.1. RF Safety .......................................................................................................... 100
9.1.1.1. General ..................................................................................................................100
9.1.1.2. Exposure to RF Energy...........................................................................................100
9.1.1.3. Efficient Terminal Operation ....................................................................................100
9.1.1.4. Antenna Care and Replacement .............................................................................101
9.1.2. General Safety ................................................................................................... 101
9.1.2.1. Driving ...................................................................................................................101
9.1.2.2. Electronic Devices ..................................................................................................101
9.1.2.3. Vehicle Electronic Equipment ..................................................................................101
9.1.2.4. Medical Electronic Equipment .................................................................................101
9.1.2.5. Aircraft ...................................................................................................................101
9.1.2.6. Children .................................................................................................................102
9.1.2.7. Blasting Areas ........................................................................................................102
9.1.2.8. Potentially Explosive Atmospheres ..........................................................................102
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 10
List of Figures
Figure 1. Functional Architecture ............................................................................................... 21
Figure 2. Power Supply During Burst Emission .......................................................................... 24
Figure 3. Reject Filter Diagram .................................................................................................. 25
Figure 4. SPI Timing Diagrams .................................................................................................. 34
Figure 5. Example of an SPI to UART2 Interface Conversion Implementation ............................ 35
Figure 6. Example of RS-232 Level Shifter Implementation for UART2 ...................................... 36
Figure 7. Example of RS-232 Level Shifter Implementation for UART ........................................ 39
Figure 8. Example of V24/CMOS Serial Link Implementation for 2-wire UART ........................... 40
Figure 9. Example of V24/CMOS Serial Link Implementation for 4-wire UART ........................... 40
Figure 10. Example of V24/CMOS Serial Link Implementation for 5-wire UART ........................... 41
Figure 11. Example of Full Modem V24/CMOS Serial Link Implementation for full-UART ............. 41
Figure 12. Example of SIM Socket Implementation ...................................................................... 44
Figure 13. DC and AC Equivalent Circuits of MIC ........................................................................ 47
Figure 14. Equivalent Circuit for SPK ........................................................................................... 49
Figure 15. Example of MIC Input Differential Connection with LC Filter ........................................ 50
Figure 16. Example of MIC Input Differential Connection without LC Filter ................................... 50
Figure 17. Example of MIC Input Single-Ended connection with LC Filter..................................... 51
Figure 18. Example of MIC Input Single-Ended Connection without LC Filter ............................... 52
Figure 19. Example of Speaker Differential Connection ............................................................... 52
Figure 20. Example of Speaker Single-Ended Connection ........................................................... 53
Figure 21. Microphone................................................................................................................. 54
Figure 22. Audio Track Design .................................................................................................... 56
Figure 23. Differential Audio Connection ...................................................................................... 56
Figure 24. Single-Ended Audio Connection ................................................................................. 57
Figure 25. Relative Timing for the PWM Output ........................................................................... 58
Figure 26. Example of a LED Driven by the PWM0 or PWM1 Output ........................................... 59
Figure 27. BUZZER Output ......................................................................................................... 60
Figure 28. Example of Buzzer Implementation ............................................................................. 61
Figure 29. Example of LED Driven by the BUZZER Output .......................................................... 62
Figure 30. Example of the ON/~OFF Pin Connection Either By a Switch or Via an Open Collector
Transistor ................................................................................................................................... 64
Figure 31. Power-ON Sequence (no PIN code activated) ............................................................. 64
Figure 32. Power-OFF Sequence ................................................................................................ 66
Figure 33. RTC Supplied by a Gold Capacitor ............................................................................. 70
Figure 34. RTC Supplied by a Non Rechargeable Battery ............................................................ 70
Figure 35. RTC Supplied by a Rechargeable Battery Cell ............................................................ 71
Figure 36. TX_CTRL State During TX Burst................................................................................. 72
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 11
Product Technical Specification &
Customer Design Guidelines
Figure 37. Example of TX Status Implementation ........................................................................ 73
Figure 38. Reset Timing .............................................................................................................. 74
Figure 39. Example of ~RESET Pin Connection with Push Button Configuration .......................... 75
Figure 40. Example of ~RESET Pin Connection with Transistor Configuration ............................. 75
Figure 41. Example of an RF 50 line ......................................................................................... 77
Figure 42. Typical hardware configuration ................................................................................... 79
Figure 43. AirPrime WISMO218 Pin Configuration ....................................................................... 85
Figure 44. PCB Structure Example for the Application Board ....................................................... 88
Figure 45. Environmental classes ................................................................................................ 91
Figure 46. Castellation Pin Dimension and Location .................................................................... 93
Figure 47. AirPrime WISMO218 Dimensions ............................................................................... 94
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 12
List of Tables
Table 1: Input Power Supply Voltage ........................................................................................ 25
Table 2: Power Supply Pin Descriptions ................................................................................... 25
Table 3: AirPrime WISMO218 Operating Modes ....................................................................... 27
Table 4: Consumption/Software Driver Recommendations ....................................................... 32
Table 5: Electrical Characteristics of Digital I/O ......................................................................... 33
Table 6: SPI Bus Pin Descriptions ............................................................................................ 34
Table 7: Main Serial Link Pin Descriptions ................................................................................ 37
Table 8: Recommended Components....................................................................................... 39
Table 9: Electrical Characteristics of SIM Interface ................................................................... 43
Table 10: SIM Interface Pin Description ...................................................................................... 43
Table 11: Recommended Components....................................................................................... 44
Table 12: Pin Description of the SIM Socket ............................................................................... 44
Table 13: GPIO Pin Descriptions ................................................................................................ 45
Table 14: Electrical Characteristics of ADC................................................................................. 46
Table 15: Analog to Digital Converter Pin Description ................................................................. 46
Table 16: Electrical Characteristics of MIC.................................................................................. 47
Table 17: Speaker Details .......................................................................................................... 48
Table 18: Electrical Characteristics of SPK ................................................................................. 49
Table 19: Analog Audio Interface Pin Descriptions...................................................................... 49
Table 20: Murata Examples ........................................................................................................ 55
Table 21: PWM Electrical Characteristics ................................................................................... 58
Table 22: PWM Pin Descriptions ................................................................................................ 58
Table 23: BUZZER Electrical Characteristics .............................................................................. 60
Table 24: BUZZER Pin Descriptions ........................................................................................... 60
Table 25: Electrical Characteristics of the ON/~OFF Signal ........................................................ 63
Table 26: ON/~OFF Signal Pin Descriptions ............................................................................... 63
Table 27: Electrical Characteristics of the Signal ........................................................................ 67
Table 28: WISMO_READY Indication Pin Descriptions ............................................................... 67
Table 29: Electrical Characteristics of the Signals ....................................................................... 68
Table 30: VCC_2V8 Pin Descriptions ......................................................................................... 68
Table 31: Electrical Characteristics of the Signal ........................................................................ 69
Table 32: BAT-RTC Pin Descriptions .......................................................................................... 69
Table 33: TX_CTRL Status ........................................................................................................ 72
Table 34: Electrical Characteristics of the Signal ........................................................................ 72
Table 35: TX_CTRL Signal Pin Descriptions ............................................................................... 73
Table 36: Electrical Characteristics of the Signals ....................................................................... 74
Table 37: Reset Pin Descriptions ................................................................................................ 74
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 13
Product Technical Specification &
Customer Design Guidelines
Table 38: Reset Commands ....................................................................................................... 75
Table 39: Antenna Specifications ............................................................................................... 76
Table 40: Equipment Reference List ........................................................................................... 79
Table 41: Operating Mode Information ....................................................................................... 83
Table 42: AirPrime WISMO218 Power Consumption .................................................................. 84
Table 43: Standards Conformity for the AirPrime WISMO218 Embedded Module ....................... 89
Table 44: Applicable Standards and Requirements..................................................................... 89
Table 45: Operating Class Temperature Range .......................................................................... 90
Table 46: Standards Conformity for the AirPrime WISMO218 Embedded Module ....................... 98
Table 47: Applicable Standards and Requirements for the AirPrime WISMO218 Embedded
Module ................................................................................................................................... 98
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 14
1. References
Abbreviati on
Defi nition
AC
Alternative Current
ADC
Analog to Digital Converter
A/D
Analog to Digital conversion
AF
Audio-Frequency
AGC
Automatic Gain Control
AT
ATtention (prefix for modem commands)
AUX
AUXiliary
CAN
Controller Area Network
CB
Cell Broadcast
CBS
Cell Broadcast Service
CE - CEP
Circular Error Probable
CLK
CLocK
CMOS
Complementary Metal Oxide Semiconductor
CODEC
COder DECoder
CPU
Central Processing Unit
CS
Coding Scheme
1.1. Reference Documents
Several documents are referenced throughout this specification. For more details, please consult the
listed reference documents. The Sierra Wireless documents referenced herein are provided in the
Sierra Wireless documentation package; however, the general reference documents which are not
Sierra Wireless owned are not provided in the documentation package.
1.1.1. Sierra Wireless Reference Documentation
[1] AirPrime WISMO218 Hardware Presentation
Reference: WA_DEV_W218_PTS_001
[2] AirPrime WISMO218 AT Commands Manual
Reference: WA_DEV_W218_UGD_003
[3] AirPrime WS Series Development Kit User Guide
Reference: WA_DEV_W218_UGD_004
[4] Customer Process Guideline for AirPrime WS Series
Reference: WA_DEV_WISMO_PTS_001
1.2. List of Abbreviations
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References
Abbreviati on
Defi nition
CSD
Circuit Switched Data
CTS
Clear To Send
DAC
Digital to Analog Converter
DAI
Digital Audio Interface
dB
Decibel
DC
Direct Current
DCD
Data Carrier Detect
DCE
Data Communication Equipment
DCS
Digital Cellular System
DR
Dynamic Range
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
ETSI
European Telecommunications Standards Institute
FIFO
First In First Out
FR
Full Rate
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
GPSI
General Purpose Serial Interface
GSM
Global System for Mobile communications
HR
Half Rate
Hi Z
High impedance (Z)
IC
Integrated Circuit
IDE
Integrated Development Environment
IF
Intermediate Frequency
IMEI
International Mobile Equipment Identification
I/O
Input / Output
LCD
Liquid Crystal Display
LED
Light Emitting Diode
LNA
Low Noise Amplifier
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References
Abbreviati on
Defi nition
LSB
Less Significant Bit
MAX
MAXimum
MIC
MICrophone
MIN
MINimum
MMS
Multimedia Message Service
MO
Mobile Originated
MS
Mobile Station
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
PCL
Power Control Level
PCM
Pulse Code Modulation
PDA
Personal Digital Assistant
PFM
Power Frequency Modulation
PLL
Phase Lock Loop
PSM
Phase Shift Modulation
PWM
Pulse Width Modulation
RAM
Random Access Memory
RF
Radio Frequency
RFI
Radio Frequency Interference
RHCP
Right Hand Circular Polarization
RI
Ring Indicator
RMS
Root Mean Square
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
SMD
Surface Mounted Device/Design
SMS
Short Message Service
SPI
Serial Peripheral Interface
SPL
Sound Pressure Level
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References
Abbreviati on
Defi nition
SPK
SPeaKer
SW
SoftWare
PSRAM
Pseudo Static RAM
TBC
To Be Confirmed
TDMA
Time Division Multiple Access
TP
Test Point
TU
Typical Urban fading profile
TUHigh
Typical Urban, High speed fading profile
TVS
Transient Voltage Suppressor
TX
Transmit
TYP
TYPical
UART
Universal Asynchronous Receiver-Transmitter
UBX
µ-blox proprietary protocol (NE DOIT PAS APPARAITRE)
USB
Universal Serial Bus
USSD
Unstructured Supplementary Services Data
VSWR
Voltage Standing Wave Ratio
WAP
Wireless Application Protocol
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 18
2. General Description
2.1. General Information
The AirPrime WISMO218 Intelligent Embedded Module is a self-contained EGSM/GPRS 900/1800
dual-band embedded module that was specifically designed for M2M systems deployed in Europe
and Asia.
2.1.1. Overall Dimensions
Length: 25.0 mm
Width: 25.0 mm
Thickness: 2.8 mm (excluding label thickness)
Weight: 3.8 g
2.1.2. Environment and Mechanics
Green policy: Restriction of Hazardous Substances in Electrical and Electronic Equipment
(RoHS) compliant
Complete shielding
The AirPrime WISMO218 is compliant with RoHS 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) or polybrominated diphenyl ethers (PBDE)”.
2.1.3. GSM/GPRS Features
2 Watts EGSM 900 radio section running under 3.6 Volts
1 Watt GSM1800 radio section running under 3.6 Volts
Hardware GPRS class 10 capable
2.1.4. Interfaces
VBAT power supply
Digital section running under 2.8 Volts
3V/1V8 SIM interface
Power supplies
Serial link (UART)
Analog audio
ADC
Serial bus SPI for debug trace
PWM0,1 and PWM2 for buzzer output
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Product Technical Specification &
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General Description
GPIOs
ON/~OFF
TX burst indicator
Embedded Module ready indicator
Reset
2.1.5. Firmware
Drives the AirPrime WISMO218 Embedded Intelligent Module via an AT command interface
over a serial port
Full GSM/GPRS Operating System stack
Real Time Clock with calendar
2.1.6. Connection Interfaces
The AirPrime WISMO218 has a 46-pin castellation form factor which provides:
One ANT pin for RF in/out
Other pins for baseband signals
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General Description
WISMO218
ARM
core
DSP
core
Radio
GSM / GPRS
Digital Interfaces
Analog Interfaces
Memory
UART
ADCs
AUDIO
SIM
Control &
Power
ControlDataAddress
reset
RTC
power
supplys
PWMs
32768
kHz
GPIOs
BUZZER
SPI / I2C
2.2. Functional Description
The global architecture of the AirPrime WISMO218 is shown below:
Figure 1. Functional Architecture
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General Description
Transmit Band (Tx)
Receive Band (Rx)
E-GSM 900
880 to 915 MHz
925 to 960 MHz
DCS 1800
1710 to 1785 MHz
1805 to 1880 MHz
2.2.1. RF Functionalities
The Radio Frequency (RF) range complies with the Phase II EGSM 900/DCS 1800 recommendation.
The frequency range for the transmit band and receive band are listed in the table below.
The RF part of the AirPrime WISMO218 is based on a specific dual band chip which includes:
a Digital low-IF receiver
a dual-band LNAs (Low Noise Amplifier)
an Offset PLL (Phase Locked Loop) transmitter
a Frequency synthesizer
a Digitally controlled crystal oscillator (DCXO)
a Tx/Rx FEM (Front-End Module) for dual-band GSM/GPRS
2.2.2. Baseband Functionalities
The Baseband is composed of an ARM9, a DSP and an analog element (with audio signals, I/Q
signals and ADC).
The core power supply is 1.2V and the digital power supply is 2.8V.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 22
3. Interfaces
Subsecti on Nam e
Driven by AT Commands
Serial Interface (SPI)
No
Main Serial Link
Yes
SIM Interface
Yes
General Purpose IO
Yes
Analog to Digital Converter
No (*)
Analog Audio Interface
No (*)
PWMs
Yes
PWM2 for Buzzer Output
Yes
ON/~OFF
No
Embedded Module Ready Indication
No
VBAT_RTC (Backup Battery)
No
TX Burst Indication Signal
No
Reset
No
3.1. General Interfaces
The AirPrime WISMO218 has a 46-pin castellation connection, which provides access to all available
interfaces.
The available interfaces are listed in the table below.
(*) These interfaces will have AT command support in future versions.
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Product Technical Specification &
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Interfaces
Uripp
VBATT
Uripp
T = 4,615 ms
t = 577 µs
3.2. Power Supply
3.2.1. Power Supply Description
The power supply is one of the key elements in the design of a GSM terminal.
Due to the burst emission in GSM/GPRS, the power supply must be able to deliver high current peaks
in a short time. During the peaks, the ripple (U
limit (see Table 1: Input Power Supply Voltage below).
Listed below are the corresponding radio burst rates for the different GPRS classes in communication
mode.
A GSM/GPRS class 2 terminal emits 577µs radio bursts every 4.615ms. (See Figure 2 Power
Supply During Burst Emission below.)
) on the supply voltage must not exceed a certain
ripple
Figure 2. Power Supply During Burst Emission
A GPRS class 10 terminal emits 1154µs radio bursts every 4.615ms.
VBATT provides for the following functions:
Directly supplies the RF components with 3.6V. It is essential to keep a minimum voltage
ripple at this connection in order to avoid any phase error.
The peak current (1.4A peak in GSM /GPRS mode) flows with a ratio of:
1/8 of the time (around 577µs every 4.615ms for GSM /GPRS cl. 2)
and
1/4 of the time (around 1154µs every 4.615ms for GSM /GPRS cl. 10)
with the rising time at around 10µs.
Internally used to provide, via several regulators, the supply required for the baseband
signals.
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Interfaces
V
MI N
V
NO M
V
MA X
I
TY P.
I
MA X
Ripple m ax (U
ri pp
)
VBATT
3.2(1)
3.6
4.8
1.35A
1.4A
10kHz to 100kHz: less
than100mVpp
greater than 100kHz: less
than 10mVpp
Signal
Pin Number (s)
VBATT
29,30
GND
20,22,23,26,28,31
Filter
WISMO218
Supply source
VBATT
L1
C1 C2
3.2.2. Electrical Characteristics
Table 1: Input Power Supply Voltage
(1): This value has to be guaranteed during the burst (with 1.4A Peak in GSM or GPRS mode)
(2): Maximum operating Voltage Stationary Wave Ratio (VSWR) 1.5:1
When powering the AirPrime WISMO218 with a battery, the total impedance (battery + protections +
PCB) should be less than 150m.
3.2.3. Pin Description
Table 2: Power Supply Pin Descriptions
3.2.4. Application
The reject filter can be connected between VBATT and the supply sources if the supply source is
noisy.
Caution: If the reject filter (C1+L1+C2) is an option, a capacitor (i.e. C2) is mandatory close to VBATT.
Figure 3. Reject Filter Diagram
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Product Technical Specification &
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Interfaces
Component
Manufact urer
GRM21BR60J106KE19L
MURATA
CM21X5R106M06AT
KYOCERA
JMK212BJ106MG-T
TAYO YUDEN
C2012X5R0J106MT
TDK
Component
Manufact urer
XPL2010-201ML
COILCRAFT
3.2.4.1. Recommended Components
C1, C2: 10µF +/-20%
L1: 200nH +/-20%
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Interfaces
Mode
Descri ption
OFF Mode
When VBATT power is supplied to the AirPrime WISMO218 but has not yet been
powered ON.
Alarm Mode
When alarm clock is set for the AirPrime WISMO218 with ALL of the following
conditions:
before time is up
with AT + CPOF having been entered from a computer that is connected to the
AirPrime WISMO218
with the ON/~OFF signal being left open (remains at HIGH level)
Idle Mode
When the AirPrime WISMO218 has a location update with a live network but with no
GSM/GPRS connection, while the UART interface is in sleep mode. Refer to Note 1.
Connected Mode
The AirPrime WISMO218 has GSM voice codec connection with a live network.
Transfer Mode
The AirPrime WISMO218 has GPRS data transfer connection with a live network.
3.3. Power Consumption
3.3.1. Various Operating Modes
There are various kinds of operating modes for the AirPrime WISMO218 as defined in the table
below.
Table 3: AirPrime WISMO218 Operating Modes
Note 1
: There are two different methods to enter sleep mode through the AT command setting, AT + PSSLEEP, as
described below:
AT + PSSLEEP = 0
The entry of sleep mode is controlled by the level of DTR signal and the firmware.
When DTR (viewed from the embedded module side) is of LOW voltage level, the
AirPrime WISMO218 will never enter sleep mode.
When DTR (viewed from the embedded module side) is of HIGH voltage level, the
AirPrime WISMO218 will enter sleep mode. To wake the AirPrime WISMO218 up, it is
necessary to toggle the DTR (viewed from the embedded module side) from HIGH to
LOW voltage level.
This method should be applied if the application needs to forbid the entry of sleep mode.
AT + PSSLEEP = 1
For this method, the entry of sleep mode is controlled just by the firmware.
When the AirPrime WISMO218 has had no activities for a certain period of time, it will
enter sleep mode automatically, regardless of the DTR level.
Any ASCII character on the UART can wake the AirPrime WISMO218 up. Note that due
to the wake-up mechanism of the AirPrime WISMO218, it is recommended to have at
least 10ms latency time after the wake-up character before sending AT commands to the
embedded module.
For details of the AT + PSSLEEP command, please refer to document [2] AirPrime WISMO218 AT
Commands Manual.
Note that the power consumption level will vary depending on the operating mode used.
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Interfaces
AirPrime WISMO218 Power Consumpti on
Oper ating Mode
Parame ters
I
av er age
I
pe ak
Unit
VBATT=4.8V
VBATT=3.6V
VBATT=3.2V
Off Mode (AirPrime WISMO218 stand alone)
50
NA
µA
Off Mode (using application note: Very Low
Power Consumption*)
<1
NA
µA
Idle Mode**
Paging 2 (Rx burst occurrence
~0.5s)
1.9
2.0
2.1
570
mA
Paging 9 (Rx burst occurrence
~2s)
1.2
1.3
1.3
570
mA
Connected
Mode
900 MHz
PCL5 (TX power
33dBm)
211
214
217
1400 TX
mA
PCL19 (TX power
5dBm)
79
82
84
220 TX
mA
1800MHz
PCL0 (TX power
30dBm)
160
163
164
950 TX
mA
PCL15 (TX power
0dBm)
77
80
81
200 TX
mA
GPRS
Transfer
Mode
class 8
(4Rx/1Tx)
900 MHz
Gam.3 (TX power
33dBm)
201
203
206
1400 TX
mA
Gam.17 (TX power
5dBm)
73
77
78
220 TX
mA
1800 MHz
Gam.3 (TX power
30dBm)
151
154
155
950 TX
mA
Gam.18 (TX power
0dBm)
71
75
76
200 TX
mA
Transfer
Mode
class 10
(3Rx/2Tx)
900 MHz
Gam.3 (TX power
33dBm)
366
369
373
1450 TX
mA
Gam.17 (TX power
5dBm)
107
111
113
240 TX
mA
1800 MHz
Gam.3 (TX power
30dBm)
263
267
268
970 TX
mA
Gam.18 (TX power
0dBm)
103
106
108
220 TX
mA
3.3.2. Power Consumption
The power consumption level will vary depending on the operating mode, and it is for this reason that
the following consumption values are given for each mode and RF band.
The following consumption values were obtained by performing measurements on AirPrime
WISMO218 samples at a temperature of 25° C.
Note: All of the following information given assumes a 50 RF output.
Power consumption performance is software related. The results listed below (typical values) are
based on the software version L02_00gg.WISMO218.
* The application note “Very Low Power Consumption” (Reference: WA_DEV_GEN_APN_020-003) can be found
on the Sierra Wireless website (under the Developer section).
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Product Technical Specification &
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Interfaces
** Idle Mode consumption depends on the SIM card used. Some SIM cards respond faster than others, in which
case the longer the response time is, the higher the consumption is.
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), in GSM mode only (worst case).
RX
Three VBATT values are used to measure the power consumption - VBATTmin (3.2V), VBATTmax
(4.8V) and VBATTtyp (3.6V).
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 more information about the consumption measurement procedure, refer to Section 4
Consumption Measurement Procedure.
3.3.3. Consumption Waveform Samples
The consumption waveforms presented below are for an EGSM900 network configuration.
The typical VBATT voltage is 3.6V.
Four significant operating mode consumption waveforms are shown in the following subsections,
namely:
Connected Mode (PCL5: Tx power 33dBm)
Transfer mode (GPRS class 10, gam.3: Tx power 33dBm )
Idle mode (Paging 2)
Idle mode (Paging 9)
Note that the following diagrams only show the waveform of the current, but not the exact values.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 29
Product Technical Specification &
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Interfaces
3.3.3.1. Connected Mode Current Waveform
3.3.3.2. Transfer Mode Class 10 Current Waveform
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Product Technical Specification &
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Interfaces
3.3.3.3. Idle Mode Page 2 Current Waveform
3.3.3.4. Idle Mode Page 9 Current Waveform
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Product Technical Specification &
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Interfaces
Signal
Pin
Number
I/O
I/O Type
Reset State
SW Driver Recommended (O utput
Stat e)
GPIO1
24
I/O
2V8
Pull up
1 logic level
GPIO3
16
I/O
2V8
Pull up
1 logic level
GPIO5
19
I/O
2V8
Z**
Input: 0 logic level
Output: 1logic level
3.3.4. Recommendations for Less Consumption
For better power consumption, in particular for the quiescent current, it is recommended to drive the
GPIOs as shown in the table below.
Table 4: Consumption/Software Driver Recommendations
GPIO2 is dedicated for WISMO_READY and is not open as GPIO purpose for customer use.
GPIO4 is dedicated for TX burst indication and is not open as GPIO purpose for customer use.
** When GPIO5 is used as a general purpose output, it is necessary to have an external pull up resistor connecting to a
2.8V source. Resistance value depends on the current drain required by the application side.
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Product Technical Specification &
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Interfaces
2.8 Volts Type (2V8 )
Parame ter
I/O type
Mi nimum
Typ
Maximum
Condit ion
Internal 2.8V power supply
VCC_2V8
2.7V
2.8V
2.95V
Input / Output pin
VIL
CMOS
-0.4V*
-
0.4V
VIH
CMOS
2.4V
-
VCC_2V8 +
0.4V
VOL
CMOS
- - 0.1V
VOH
CMOS
2.7V
- -
2.4V
- - IOH = 4mA
3.4. Electrical Information for Digital I/O
The I/Os concerned are all interfaces such as GPIOs, SPIs, etc.
Table 5: Electrical Characteristics of Digital I/O
* Absolute maximum ratings
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Product Technical Specification &
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Interfaces
Signal
Pin
Number
I/O
I/O Type
Reset State
Descri ption
SPI-CLK
15 O 2V8
Pull down
SPI Serial Clock
SPI-IO
13
I/O
2V8
Pull down
SPI Serial input/output
SPI-O
14 O 2V8
Pull down
SPI Serial input
~SPI-CS
17 O 2V8
Pull up
SPI Enable
SPI-IRQ
25 I 2V8
Pull down
SPI Interrupt
3.5. SPI Bus for Debug Trace ONLY
The AirPrime WISMO218 provides one SPI bus through the castellation pin.
3.5.1. Pin Description
Table 6: SPI Bus Pin Descriptions
By default, the AirPrime WISMO218 SPI interface is only used for monitoring trace for debug
purposes. An SPI-to-UART2 conversion circuit is required to convert the SPI trace to UART2. Also,
the SPI-IRQ (pin 25) is required for interrupt. Again, note that the SPI interface of the AirPrime
WISMO218 is not open for application use other than debug trace.
3.5.1.1. SPI Waveforms
Figure 4. SPI Timing Diagrams
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Product Technical Specification &
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Interfaces
Component
Descri ption/Details
Manufact urer
U103
SC16IS750IPW
NXP Semiconductors
X101
3, 6864MHz 86SMX surface mount crystal (971-3131)
Farnell
R104, R105
10K
R106
1K
C105
22pF
C106
33pF
C107
100nF
Figure 5. Example of an SPI to UART2 Interface Conversion Implementation
The following table lists the recommended components to use in implementing the SPI to UART2
interface.
After converting the SPI signal to a UART signal, a UART transceiver circuitry is needed to
communicate this UART signal to DTE.
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Product Technical Specification &
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Interfaces
Component
Descri ption/Details
Manufact urer
U200
LTC2804IGN-1
LINEAR TECHNOLOGY
L200
LQH2M CN100K02L
MURATA
J200
096615276119 SUBD9F
HARTING
R202
NC
R204
100K
C200
1µF C201
220nF
C207
1µF C208
1µF
Figure 6. Example of RS-232 Level Shifter Implementation for UART2
The following table lists the recommended components to use in implementing a UART transceiver
circuitry.
Note: It is recommended to make SPI signals accessible for diagnostics by reserving some test points, for
example.
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Product Technical Specification &
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Interfaces
Signal
Pin Number
I/O
I/O
Type
Reset
Stat e
Descri ption
CT103/TXD*
38 I 2V8 1 Transmit serial data
CT104/RXD*
40 O 2V8 1 Receive serial data
~CT105/RTS*
39 I 2V8 0 Request To Send
~CT106/CTS*
41 O 2V8 0 Clear To Send
~CT107/DSR*
42 O 2V8 1 Data Set Ready
~CT108/DTR*
44 I 2V8 1 Data Terminal Ready
~CT109/DCD*
43 O 2V8 1 Data Carrier Detect
~CT125/RI *
45 O 2V8 1 Ring Indicator
GND*
GND
Ground
3.6. Main Serial Link (UART)
A flexible 8-wire serial interface is available on the AirPrime WISMO218 that complies with the V24
protocol signaling, but not with the V28 (electrical interface) due to its 2.8-Volt interface.
3.6.1. Features
The supported baud rates of the UART are 1200, 2400, 4800, 9600, 19200, 38400, 57600 and
115200 Kbits, with autobauding.
The signals used by the UART are as follows:
TX data (CT103/TXD)
RX data (CT104/RXD)
Request To Send (~CT105/RTS)
Clear To Send (~CT106/CTS)
Data Terminal Ready (~CT108/DTR)
Data Set Ready (~CT107/DSR)
Data Carrier Detect (~CT109/DCD)
Ring Indicator (~CT125/RI)
3.6.2. Pin Description
Table 7: Main Serial Link Pin Descriptions
* According to PC (DTE) view
The rising time and falling time of the reception signals (mainly CT103/TXD) have to be less than
300ns.
Tip: The AirPrime WISMO218 is designed to operate using all the serial interface signals. In particular, it is
recommended to use ~CT105/RTS and ~CT106/CTS for hardware flow control in order to avoid data
corruption during transmissions.
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Product Technical Specification &
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Interfaces
3.6.2.1. 5-wire Serial Interface Hardware Design
Signal: CT103/TXD*, CT104/RXD*, ~CT105/RTS*, ~CT106/CTS*
The signal ~CT108/DTR* must be managed following the V24 protocol signaling if we want to
use idle mode.
For detailed configuration, please refer to Figure 10 Example of V24/CMOS Serial Link
Implementation for 5-wire UART.
3.6.2.2. 4-wire Serial Interface Hardware Design
Signal: CT103/TXD*, CT104/RXD*, ~CT105/RTS*, ~CT106/CTS*
The signal ~CT108/DTR* can be looped back to ~CT107/DSR from both the AirPrime
WISMO218 side and from the DTE side.
For detailed configuration, please refer to Figure 9 Example of V24/CMOS Serial Link
Implementation for 4-wire UART.
3.6.2.3. 2-wire Serial Interface Hardware Design
This case is possible for a connected external chip, but it is not recommended.
The flow control mechanism has to be managed from the customer side.
Signal: CT103/TXD*, CT104/RXD*
The signal ~CT108/DTR* can be looped back to ~CT107/DSR from both the AirPrime
WISMO218 side and from the DTE side.
The signals ~CT105/RTS*, ~CT106/CTS* are not used, please configure using the AT
command, AT + IFC = 0,0 (see document [2] AirPrime WISMO218 AT Commands Manual).
The signal ~CT105/RTS* can be looped back to ~CT106/CTS* from both the AirPrime
WISMO218 side and from the DTE side.
For detailed configuration, please refer to Figure 8 Example of V24/CMOS Serial Link
Implementation for 2-wire UART.
Note: The loop back connection of ~CT108/DTR* to ~CT107/DSR is not allowed when the case
AT+PSSLEEP=0 is used, for which sleep mode entry is ~CT108/DTR* level dependent. (Refer to
Note 1 of the Power Consumption section. In order to go to sleep mode properly under such
configuration, AT+PSSLEEP=1 should be used instead. For details, please refer to document [2]
AirPrime WISMO218 AT Commands Manual.
* According to PC (DTE) view
3.6.3. Application
The level shifter must be a V28 electrical signal compliant with 2.8V.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 38
Product Technical Specification &
Customer Design Guidelines
Interfaces
Component
Descri ption/Details
Manufact urer
R1, R2
15K
C1, C2, C3, C4, C5
1µF
C6
100nF
C7
6.8uF TANTAL 10V CP32136
AVX
U1
ADM3307EACP
ANALOG DEVICES
J1
SUB-D9 female
Figure 7. Example of RS-232 Level Shifter Implementation for UART
Note that the U1 chip also protects the AirPrime WISMO218 against ESD (Air Discharge) at 15KV.
Table 8: Recommended Components
R1 and R2 are necessary only during Reset state to force the ~CT125/RI and ~CT109/DCD signals to
HIGH level.
The ADM3307EACP can be powered by the VCC_2V8 (pin 46) of the AirPrime WISMO218 or by an
external regulator at 2.8V.
If the UART interface is connected directly to a host processor, it is not necessary to use level
shifters. The interface can be connected as shown in the figure(s) below:
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 39
Product Technical Specification &
Customer Design Guidelines
Interfaces
Customer application
( DTE )
WISMO218
( DCE )
ON/~OFF
CT103/TXD
CT104/RXD
~CT105/RTS
~CT106/CTS
37
39
40
38
GND
Rx
RTS
CTS
GND
Tx
41
42
~CT107/DSR
44
~CT108/DTR
~CT109/DCD
~CT125/RI45
43 DCD
RI
DSR
DTR
Customer application
( DTE )
WISMO218
( DCE )
ON/~OFF
CT103/TXD
CT104/RXD
~CT105/RTS
~CT106/CTS
37
39
40
38
GND
Rx
RTS
CTS
GND
Tx
41
42
~CT107/DSR
44
~CT108/DTR
~CT109/DCD
~CT125/RI45
43 DCD
RI
DSR
DTR
3.6.3.1. V24/CMOS Possible Design
Figure 8. Example of V24/CMOS Serial Link Implementation for 2-wire UART
Figure 9. Example of V24/CMOS Serial Link Implementation for 4-wire UART
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 40
Product Technical Specification &
Customer Design Guidelines
Interfaces
Customer application
( DTE )
WISMO218
( DCE )
ON/~OFF
CT103/TXD
CT104/RXD
~CT105/RTS
~CT106/CTS
37
39
40
38
GND
Rx
RTS
CTS
GND
Tx
41
42
~CT107/DSR
44
~CT108/DTR
~CT109/DCD
~CT125/RI
45
43 DCD
RI
DSR
DTR
Customer application
( DTE )
WISMO218
( DCE )
GND
ON/~OFF
~CT107/DSR
~CT109/DCD
~CT108/DTR
~CT125/RI
37
43
44
45
42
GND
DCD
DTR
RI
GND
DSR
CT103/TXD
CT104/RXD
~CT105/RTS
~CT106/CTS
41
39
40
38
Rx
RTS
CTS
Tx
2x 10K
2.8Volt
Figure 10. Example of V24/CMOS Serial Link Implementation for 5-wire UART
The designs shown in Figure 8, Figure 9, and Figure 10 are basic designs. Both the DCD and RI can
be left open when not used.
However, a more flexible design to access this serial link with all modem signals is shown below.
Figure 11. Example of Full Modem V24/CMOS Serial Link Implementation for full-UART
There is an internal 10K pull-up resistor on RI and DCD to set it to HIGH level during the reset state.
The UART interface is a 2.8V type, but is 3V tolerant.
Tip: The AirPrime WISMO218 UART is designed to operate using all the serial interface signals. In
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 41
particular, it is recommended to use ~CT105/RTS and ~CT106/CTS for hardware flow control in order
to avoid data corruption during transmission.
Product Technical Specification &
Customer Design Guidelines
Interfaces
3.7. SIM Interface
The Subscriber Identification Module can be directly connected to the AirPrime WISMO218 through
this dedicated interface.
3.7.1. Features
The SIM interface controls both 1.8V and 3V SIM cards.
It is recommended to add Transient Voltage Suppressor diodes (TVS) on the signal connected to the
SIM socket in order to prevent any Electrostatic Discharge.
TVS diodes with low capacitance (less than 10pF) have to be connected on SIM-CLK and SIM-IO
signals to avoid any disturbance from the rising and falling edge.
These types of diodes are mandatory for the Full Type Approval. They will be placed as close as
possible to the SIM socket.
The recommended low capacitance diode array to use is the DALC208SC6 from ST Microelectronics.
The SIM uses four (4) signals, namely:
SIM-VCC: SIM power supply
~SIM-RST: reset
SIM-CLK: clock
SIM-IO: I/O port
The SIM interface controls a 3V/1V8 SIM. This interface is fully compliant with the GSM 11.11
recommendations concerning SIM functions.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 42
Product Technical Specification &
Customer Design Guidelines
Interfaces
Parame ter
Condit ions
Mi nim.
Typ
Maxim.
Unit
SIM-IO VIH
IIH = ± 20µA
0.7xVSIM
- - V
SIM-IO VIL
IIL = 1mA
- - 0.4
V
~SIM-RST, SIM-CLK
VOH
Source current = 20µA
0.9xVSIM
- - V
SIM-IO VOH
Source current = 20µA
0.8xVSIM
- - V
~SIM-RST, SIM-IO, SIMCLK
VOL
Sink current =
-200µA
- - 0.4
V
SIM-VCC Output Voltage
SIM-VCC = 2.9V
2.75
2.9
3.0
V
SIM-VCC = 1.8V
1.65
1.8
1.95
V
SIM-VCC current
full-power mode
- - 20
mA
Sleep mode with 32kHz system
clock enabled.
- - 3
mA
SIM-CLK Rise/Fall Time
Loaded with 30pF and ESD
protection diode
-
25
50
ns
~SIM-RST, Rise/Fall Time
Loaded with 30pF and ESD
protection diode
-
45 - ns
SIM-IO Rise/Fall Time
Loaded with 30pF and ESD
protection diode
-
0.2 1 µs
SIM-CLK Frequency
Loaded with 30pF
- - 3.25
MHz
Signal
Pin
Number
I/O
I/O Type
Reset
Stat e
Descri ption
Multiplexed
with
SIM-CLK
9 O 2V9 / 1V8
0
SIM Clock
Not mux
~SIM-RST
11 O 2V9 / 1V8
0
SIM Reset
Not mux
SIM-IO
10
I/O
2V9 / 1V8
Pull up
SIM Data
Not mux
SIM-VCC
8 O 2V9 / 1V8
SIM Power Supply
Not mux
Table 9: Electrical Characteristics of SIM Interface
3.7.2. Pin Description
Table 10: SIM Interface Pin Description
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 43
Product Technical Specification &
Customer Design Guidelines
Interfaces
Component
Descri ption/Details
Manufact urer
C400
100nF
D400
ESDA6V1SC6
ST
D401
DALC208SC6
SGS-THOMSON
J400
ITT CANNON CCM03 series
(See section 6.2 SIM Card Reader for more information)
CANNON
Signal
Pin Number
Descri ption
VCC
1
SIM-VCC
RST
2
~SIM-RST
CLK
3
SIM-CLK
CC4
4
Not connected
GND
5
GROUND
VPP
6
Not connected
I/O 7 SIM-IO
CC8
8
Not connected
3.7.3. Application
Figure 12. Example of SIM Socket Implementation
Table 11: Recommended Components
3.7.3.1. SIM Socket Connection
Table 12: Pin Description of the SIM Socket
Note: CC4 and CC8 are not connected as the AirPrime WISMO218 does not support SIM detect feature.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 44
Product Technical Specification &
Customer Design Guidelines
Interfaces
Signal
Pin Number
I/O
I/O Type
Reset State
GPIO1
24
I/O
2V8
Pull up
GPIO3
16
I/O
2V8
Pull up
GPIO5
19
I/O
2V8
Pull down
3.8. General Purpose Input/Output
The AirPrime WISMO218 provides up to 3 General Purpose I/Os. They are used to control any
external device such as an LCD or a Keyboard backlight.
These GPIOs offer the possibility to read the pin state whatever their direction may be.
3.8.1. Pin Description
Table 13: GPIO Pin Descriptions
Caution: GPIO2 is dedicated for WISMO_READY and is not open as GPIO purpose for customer use.
GPIO4 is dedicated for TX burst indication and is not open as GPIO purpose for customer use.
When GPIO5 is used as a general purpose output, it is necessary to have an external pull up resistor
connecting to a 2.8V source. Resistance value depends on the current drain required by the
application side.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 45
Product Technical Specification &
Customer Design Guidelines
Interfaces
Parame ter
Mi n
Typ
Max
Unit
Resolution
-
10 - bits
Sampling frequency
- - 200
kHz
Input signal range
1 general purpose input
0 - 1
V
1 general purpose input in
div-by-3 mode
0 - 3
V
Integral non-linearity (INL)
-2.5 - +2.5
bit
Differential non-linearity (DNL)
-1 - +3
bit
Input impedance
input resistance
120 - -
K
input capacitance
- - 10
pF
Signal
Pin Number
I/O
I/O Type
Descri ption
AUX-ADC0
5 I Analog
A/D converter
3.9. Analog to Digital Converter
One Analog to Digital Converter input is provided by the AirPrime WISMO218. It is a 10-bit resolution
converter, ranging from either 0 to 1V or 0 to 3V, depending on the general purpose input mode.
3.9.1. Features
The AUX-ADC0 input can be used for customer applications.
Table 14: Electrical Characteristics of ADC
3.9.2. Pin Description
Table 15: Analog to Digital Converter Pin Description
Caution: The AUX-ADC0 pin is ESD sensitive. It is a must to add ESD protection to this pin once it is externally
accessible.
Recommended ESD protection: AVL5M02200 from Amotech.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 46
Product Technical Specification &
Customer Design Guidelines
Interfaces
DC Equi valent Ci rcuit
AC Equi valent Circuit
Parame ters
Mi n
Typ
Max
Unit
Internal biasing
DC Characteristics
MICP
-
2.4 - V
MICN without 2.2K
to GND
-
2.4 - V
MICN with 2.2K to
GND
-
1.2 - V
Output current
mA
R2 - 2.2
-
K
AC Characteristics
200 Hz<F<4 kHz
Z2 MICP
(MICN=Open)
2.2
K
Z2 MICN
(MICP=Open)
MICP
MICN
Z2
Z2
GND
MIC2+
MICP
MICN
R2
R2
GND
3.10. Analog Audio Interface
The AirPrime WISMO218 supports one microphone input and one speaker output. It also includes an
echo cancellation feature which allows hands free function.
In some cases, ESD protection must be added on the audio interface lines.
3.10.1. Microphone Features
The microphone, MIC, can either have a single-ended or a differential connection. However, it is
strongly recommended to use a differential connection in order to reject common mode noise and
TDMA noise.
When using a single-ended connection, be sure to have a very good ground plane, very good filtering
as well as shielding in order to avoid any disturbance on the audio path.
The gain of MIC inputs is internally adjusted and can be tuned using AT commands.
The MIC already includes suitable biasing for an electret microphone. The electret microphone can
then be connected directly on the inputs for easy connection.
AC coupling is also already embedded in the AirPrime WISMO218.
Figure 13. DC and AC Equivalent Circuits of MIC
3.10.1.1. Electrical Characteristics
Table 16: Electrical Characteristics of MIC
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 47
Product Technical Specification &
Customer Design Guidelines
Interfaces
Parame ters
Mi n
Typ
Max
Unit
Z2 MICP
(MICN=GND)
2.2
Z2 MICN
(MICP=GND)
Impedance between
MICP and MICN
without 2.2K to
GND
4.5
Impedance between
MICP and MICN with
2.2K to GND
3.2
Maximum working voltage
( MICP-MICN)
(THD 10%)
AT+VGT*=1
-
- 210 mVpp
Maximum rating voltage
(MICP or MICN)
-0.5 - 4.4
V
Parame ter
Typ
Unit
Connecti on
Z (SPKP, SPKN)
16 or 32
Differential mode
Z (SPKP, SPKN)
8 Single-ended mode
* The input voltage depends on the input micro gain set by the AT command. Please refer to document [2],
AirPrime WISMO218 AT Commands Manual.
** Because both MICP and MICN are internally biased, it is necessary to use a coupling capacitor to connect an
audio signal provided by an active generator. Only a passive microphone can be directly connected to the MICP input.
3.10.2. Speaker Features
The speaker, SPK, can either have a single-ended or a differential connection. However, it is strongly
recommended to use a differential connection in order to reject common mode noise and TDMA
noise. Moreover, in single-ended mode, half (1/2) of the power is lost.
When using a single-ended connection, be sure to have a very good ground plane, very good filtering
as well as shielding in order to avoid any disturbance on the audio path.
Table 17: Speaker Details
3.10.2.1. Speakers Outputs Power
The maximal specifications given below are available with the maximum power output configuration
values set by an AT command. The typical values are recommended.
3.10.2.1.1. SPK Outputs
The SPK interface allows for both differential and single ended speaker connections.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 48
Product Technical Specification &
Customer Design Guidelines
Interfaces
SPKP
WISMO218
SPKN
Parame ters
Mi n
Typ
Max
Unit
Biasing voltage
SPKP and SPKN
-
1.4 - V
Output swing
voltage
RL=8: AT+VGR=6*; single ended
- - 1
Vpp
RL=8: AT+VGR=6*; differential
- - 2
Vpp
RL=16 or 32: AT+VGR=6*; single ended
- - 1.1
Vpp
RL=16 or 32: AT+VGR=6*; differential
- - 2.2
Vpp
RL
Load resistance
6 8 -
IOUT
Output current; peak value; RL=8
- - 90
mA
POUT
RL=8; AT+VGR=10*;
- - 65
mW
Signal
Pin
Number
I/O
I/O Type
Descri ption
MICP
3 I Analog
Microphone positive input
MICN
4 I Analog
Microphone negative input
SPKP
1 O Analog
Speaker positive output
SPKN
2 O Analog
Speaker negative output
Figure 14. Equivalent Circuit for SPK
Table 18: Electrical Characteristics of SPK
* The output voltage depends on the output speaker gain set by the AT command. Please refer to document [2]
AirPrime WISMO218 AT Commands Manual.
If a single-ended connection is used, only SPKP has to be connected. The result is a maximal output
power divided by 2.
3.10.3. Pin Description
Table 19: Analog Audio Interface Pin Descriptions
3.10.4. Application
3.10.4.1. Microphone
The following subsections define different microphone configuration examples.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 49
Product Technical Specification &
Customer Design Guidelines
Interfaces
3.10.4.1.1. Microphone Differential Connection Example
When a differential connection of MIC is used, it is necessary to add a 2.2K resistor from MICN to
GND in order to have proper bias of the microphone.
Figure 15. Example of MIC Input Differential Connection with LC Filter
Audio quality can be very good without L1, L2, C2, C3 and C4 depending on the design. But if there is
EMI perturbation, this filter can reduce the TDMA noise. This filter (L1, L2, C2, C3 and C4) is not
mandatory. If not used, the capacitor must be removed and the coil replaced by a 0 resistor as the
shown in the following schematic.
Figure 16. Example of MIC Input Differential Connection without LC Filter
The capacitor C1 is highly recommended to eliminate TDMA noise. Note that C1 must be close to the
microphone.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 50
Product Technical Specification &
Customer Design Guidelines
Interfaces
Component
Descri ption/Details
Notes
C1
12pF to 33pF
needs to be tuned depending on the design
C2, C3, C4
47pF
needs to be tuned depending on the design
L1, L2
100nH
needs to be tuned depending on the design
3.10.4.1.1.1. Recommended Components
3.10.4.1.2. Microphone Single-Ended Connection Example
When single-ended connection is used for MIC, MICN is just left open.
Figure 17. Example of MIC Input Single-Ended connection with LC Filter
*Z2 is from 200Hz to 4kHz. For more characteristics refer to section 3.2.2 Electrical Characteristics.
Note that:
Internal input impedance value becomes 1100, due to the connection of the other end to
ground.
The single ended design is very sensitive to TDMA noise.
It is recommended to add L1 and C2 footprint as an LC filter to try to eliminate TDMA noise.
A very good grounding on the MIC is a must in order to ensure good audio performance
against TDMA. Also, special care on the PCB layout must be taken.
When not used, the filter can be removed by replacing L1 with a 0 resistor and by
disconnecting C2, as shown in the following schematic.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 51
Product Technical Specification &
Customer Design Guidelines
Interfaces
Component
Descri ption/Details
Notes
C1
12pF to 33pF
needs to be tuned depending on the design
C2 needs to be tuned depending on the design
L1 needs to be tuned depending on the design
SPKP
SPKN
Figure 18. Example of MIC Input Single-Ended Connection without LC Filter
*Z2 is from 200Hz to 4kHz. For more characteristics refer to section 3.2.2 Electrical Characteristics.
The capacitor C1 is highly recommended to eliminate TDMA noise. Note that C1 must be close to the
microphone.
3.10.4.1.2.1. Recommended Components
3.10.4.2. Speaker SPKP and SPKN
3.10.4.2.1. SPK Differential Connection
Figure 19. Example of Speaker Differential Connection
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 52
Product Technical Specification &
Customer Design Guidelines
Interfaces
SPKP
C1
+
SPKN
Z hp
Speaker
C333 pF
to
100 pF
X
3.10.4.2.2. SPK Single-Ended Connection
Typical implementation:
Figure 20. Example of Speaker Single-Ended Connection
4.7µF < C1 < 47 µF (Depending on speaker characteristics and output power.)
Using a single-ended connection includes losing output power (-6dB) as compared to a differential
connection.
The connection between the AirPrime WISMO218 pins and the speaker must be designed to keep the
serial impedance lower than 1.5 in a single-ended connection.
SPKN can be left open in a single-ended connection.
3.10.5. Design Recommendation
3.10.5.1. General
When both speaker and microphone are exposed to the external environment, it is recommended to
add ESD protection as close as possible to the speaker or microphone, connected between the audio
lines and a good ground.
When using the single-ended connection of MICP, ensure to have a good ground plane, good filtering
as well as shielding, in order to avoid any disturbance on the audio path.
It is important to select an appropriate microphone, speaker and filtering components to avoid TDMA
noise.
3.10.5.2. Recommended Microphone Characteristics
The impedance of the microphone has to be around 2K.
Sensitivity is from -40dB to –50 dB.
SNR > 50 dB.
Frequency response is compatible with the GSM specifications.
To suppress TDMA noise, it is highly recommended to use microphones with two internal decoupling
capacitors:
CM1=56pF (0402 package) for the TDMA noise coming from the demodulation of the
GSM900 frequency signal
CM2=15pF (0402 package) for the TDMA noise coming from the demodulation of the DCS
frequency signal
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 53
Product Technical Specification &
Customer Design Guidelines
Interfaces
CM
The capacitors have to be soldered in parallel to the microphone:
Figure 21. Microphone
3.10.5.3. Recommended Speaker Characteristics
Type of speakers: Electro-magnetic /10mW
Impedance: 8 for hands-free
Impedance: 32 for heads kit
Sensitivity: 110dB SPL min
Receiver frequency response is compatible with the GSM specifications.
3.10.5.4. Recommended Filtering Components
When designing a GSM application, it is important to select the right audio filtering components.
The strongest noise, called TDMA, is mainly due to the demodulation of the GSM900 and DCS1800
signal: A burst is produced every 4.615ms; where the frequency of the TDMA signal is equal to
216.7Hz plus harmonics.
The TDMA noise can be suppressed by filtering the RF signal using the right decoupling components.
The types of filtering components are:
RF decoupling inductors
RF decoupling capacitors
A good “Chip S-Parameter” simulator is proposed by Murata. Refer to
http://www.murata.com/products/design_support/mcsil/index.html for more details.
Using different Murata components, we could see that the value, the package and the current rating
can have different decoupling effects.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 54
Product Technical Specification &
Customer Design Guidelines
Interfaces
Package
0402
Filter ed band
GSM900
GSM 850/900
DCS/PCS
Value
100nH
56pF
15pF
Types
Inductor
Capacitor
Capacitor
Position
Serial
Shunt
Shunt
Manufact urer
Murata
Murata
Murata
Rated
150mA
50V
50V
Refere nce
LQG15HSR10J02 or
LQG15HNR10J02
GRM1555C1H560JZ01
GRM1555C1H150JZ01 or
GRM1555C1H150JB01
Package
0603
Filter ed band
GSM900
GSM 850/900
DCS/PCS
Value
100nH
47pF
10pF
Types
Inductor
Capacitor
Capacitor
Position
Serial
Shunt
Shunt
Manufact urer
Murata
Murata
Murata
Rated
300mA
50V
50V
Refere nce
LQG18HNR10J00
GRM1885C1H470JA01 or
GRM1885C1H470JB01
GRM1885C1H150JA01 or
GQM1885C1H150JB01
The table below shows some examples with different Murata components:
Table 20: M urata Examples
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 55
Product Technical Specification &
Customer Design Guidelines
Interfaces
Differential Audio line is
always in parallel
3.10.5.5. Audio Track and PCB Layout Recommendation
To avoid TDMA noise, it is recommended to surround the audio tracks with ground as shown in the
following figure:
Figure 22. Audio Track Design
For differential connections, it is necessary to add a 2.2KΩ resistor from MICN to GND to have a
proper bias of the microphone. Refer to the following figure.
Figure 23. Differential Audio Connection
For single-ended connections, the negative pole of the microphone, MICN, should be connected to
GND. Refer to the following figure.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 56
Product Technical Specification &
Customer Design Guidelines
Interfaces
Figure 24. Single-Ended Audio Connection
Caution: It is a must to avoid digital tracks crossing under and over the audio tracks.
Even when MICP is singled-ended, it is highly recommended to have the MIC ground and the LC filter
ground to act as an audio analog ground during the PCB layout. This audio ground, together with the
MICP signal, should act as the differential line pair. And this audio ground should only be connected
to the AirPrime WISMO218 embedded module ground as close as possible to the castellation GND
pin of AirPrime WISMO218. It is the same case for SPKP and SPKN.
Also, the audio interface is ESD sensitive. It is a must to add ESD protection to the interface once it is
externally accessible.
Recommended ESD protection: ESDA6VIL from ST.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 57
Product Technical Specification &
Customer Design Guidelines
Interfaces
Parame ter
Condit ion
Mi nimum
Typical
Maximum
Unit
VOH
High impedance load
2.7
2.85
- V Load with IoH = 4mA
-
2.4 - V
VOL - - - 0.1
V
I
PE AK
- - - 4 mA
Frequency
-
25.6
-
1083.3
kHz
Duty cycle
-
0* - 100*
%
Signal
Pin Number
I/O
I/O Type
Descri ption
PWM0
36 O 2V8
PWM output
PWM1
35 O 2V8
PWM output
3.11. Pulse-Width Modulators (PWMs)
The AirPrime WISMO218 contains two Pulse-Width Modulators (PWMs). They can be used in
conjunction with an external transistor for driving a vibrator, or a backlight LED.
3.11.1. Features
Each PWM uses two 7-bit unsigned binary numbers: one for the output period and one for the pulse
width or the duty cycle.
The relative timing for the PWM output is shown in the figure below.
Figure 25. Relative Timing for the PWM Output
Table 21: PWM Electrical Characteristics
3.11.2. Pin Description
Table 22: PWM Pin Descriptions
3.11.3. Application
Both the PWM0 and PWM1 signals can be used in conjunction with an external transistor for driving a
vibrator, or a backlight LED.
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Figure 26. Example of a LED Driven by the PWM0 or PWM1 Output
The value of R607 can be harmonized depending on the LED (D605) characteristics.
The recommended digital transistor to use for T601 is the DTC144EE from ROHM.
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Interfaces
Parame ter
Condit ion
Mi nimum
Typical
Maximum
Unit
VOH
High impedance load
2.7
2.85
- V Load with IoH = 4mA
-
2.4 - V
I
PEAK
- - - 4 mA
VOL - - - 0.1 V Frequency
-
200 - 2500
Hz
Duty cycle
-
0* - 100*
%
Tone level
4 dB step
-24 - 0
dB
Signal
Pin Number
I/O
I/O Type
Descri ption
BUZZER
34 O 2.8V
Buzzer output
3.12. BUZZER Output
The signal BUZZER outputs a square wave at the desired tone frequency. The tone frequencies are
programmable and can be re-programmed on-the-fly to generate monophonic audio ringtones or alert
tones. The tone level can also be adjusted in 4dB steps, or it can be muted.
3.12.1. Features
The signal BUZZER can be used in conjunction with an external transistor/MOSFET for driving a
buzzer in order to give a maximum current of 100mA (PEAK) and an average of 40mA, depending on
application requirement.
Figure 27. BUZZER Output
Table 23: BUZZ ER Electrical Characteristics
* Be mindful of the maximum frequency and the minimum/maximum duty cycle. There is a limitation due to the
RC environment. The amplitude modulation becomes less fine when the set limits are reached.
3.12.2. Pin Description
Table 24: BUZZ ER Pin Descriptions
3.12.3. Application
The maximum peak current of the transistor/MOSFET is 100mA and the maximum average current is
40mA, while the peak current of the BUZZER pin should be less than 4mA. A diode against transient
peak voltage must be added as shown below.
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BUZZER
C1
D1
VBATT
R1
WISMO218
34
R2
R3
T1
GND GND
Figure 28. Example of Buzzer Implementation
Where:
R1 must be chosen in order to limit the current at I
function of the frequency and the duty cycle used.
D1 = BAV70T-7 or BAS16 (for example)
T1 = FDN335N (for example)
R2 = 0
R3 = 1M
A low filter is recommended at low frequencies.
max of 100mA and must be adjusted in
PEAK
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3.12.3.1. Calculations of the Low Filter
Req is the total resistor in line.
C is the capacitive charge on T1 and the ground.
The cut-off frequency (Fc) must be higher than FBUZZ-OUT.
Due to the conception of this signal, the frequency modulation of the BUZZER signal is 64* FBUZZ-
OUT.
Fc must be at least 64 * FBUZZ-OUT.
Fc = 1/ (2. .Req.C)
3.12.3.2. Recommended Characteristics for the Buzzer
Electro-magnetic type
Impedance: 7 to 30
Sensitivity: 90 dB SPL min @ 10 cm
Current: 60 to 90mA
The BUZZER output can also be used to drive a LED as shown in the figure below:
Figure 29. Example of LED Driven by the BUZZER Output
The value of R607 can be harmonized depending on the LED (D605) characteristics.
The recommended digital transistor to use for T601 is the DTC144EE from ROHM.
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Parame ter
I/O Type
Mi nimum
Typ.
Maximum
Unit
VIH
2V8
2.4 - 3.0 V VIL
2V8 - -
0.4
V
Signal
Pin Number
I/O
I/O Type
Descri ption
ON/~OFF
37 I 2V8
AirPrime WISMO218 Power ON/OFF
3.13. ON/~OFF Signal
The ON/~OFF pin is used to switch ON or switch OFF the AirPrime WISMO218.
ON/~OFF signal is internally connected to the permanent 3.0V supply regulator inside the AirPrime
WISMO218 via a pull-up resistor. Once there is VBATT supply to the AirPrime WISMO218, this 3.0V
supply regulator will be enabled and so the ON/~OFF signal is by default at HIGH level.
A LOW level signal has to be provided on the ON/~OFF pin to switch ON the AirPrime WISMO218.
Caution: All external signals must be inactive when the AirPrime WISMO218 is OFF to avoid any damage
when starting and to allow the AirPrime WISMO218 to start and stop correctly.
Avoid using application MCU GPIO to directly control the ON/~OFF signal of the AirPrime
WISMO218; instead, control this signal via an open collector switching transistor.
3.13.1. Features
Table 25: Electrical Characteristics of the ON/~OFF Signal
3.13.2. Pin Description
Table 26: ON/~OFF Signal Pin Descriptions
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GND
1
2
3
Switch
ON/~OFF
3.13.3. Application
Figure 30. Example of the ON/~OFF Pin Connection Either By a Switch or Via an Open Collector Transistor
3.13.3.1. Power ON
Figure 31. Power-ON Sequence (no PIN code activated)
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Mi n
Typ.
Max
Unit
T
ready
4 5 7
s
T
rampup
- - 120
ms
The ON/~OFF signal level is detected about 250ms after VBATT is available. Note that this timing
might be temperature dependant.
The voltage of this signal has to be pulled LOW for at least 685ms for powering ON. Within this
685ms, the WISMO_READY signal will initially reset to HIGH for about 135ms and then resume to
LOW.
During the power ON sequence, an internal reset is automatically performed for 38ms (typically).
During this phase, any external reset should be avoided.
Once the AirPrime WISMO218 is properly powered ON, the WISMO_READY pin will set to HIGH
level to acknowledge the successful powering ON of the AirPrime WISMO218 before it is ready to
operate. The ON/~OFF signal can be left at LOW level until power off.
Please note that temperature conditions may affect the timing for powering up.
The recommended way to release the ON/~OFF signal is to detect the WISMO_READY signal within
685ms of powering ON while the level pulse of the ON/~OFF signal is set to LOW, and wait until the
WISMO_READY signal goes HIGH again.
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3.13.3.2. Power OFF
The AirPrime WISMO218 can be powered off by either software or hardware.
3.13.3.2.1. Software Power OFF
AT command: AT+CPOF is used to power off the AirPrime WISMO218.
Caution: If the ON/~OFF pin is maintained at LOW level when AT+CPOF is used, the embedded module can’t
be switched OFF.
3.13.3.2.2. Hardware Power OFF
A LOW level pulse is applied on the ON/~OFF pin for 5.5sec. AT+CPOF will then be automatically
sent to the AirPrime WISMO218.
Once the AirPrime WISMO218 receives the AT+CPOF command, the AirPrime WISMO218 will be
deregistered from the network. The WISMO_READY pin will become LOW to indicate that AT
commands are no longer available for the AirPrime WISMO218. If the ON/~OFF signal is HIGH, then
the AirPrime WISMO218 will also be switched off.
Figure 32. Power-OFF Sequence
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Interfaces
Parame ter
I/O Type
Mi nimum
Typ.
Maximum
Unit
VOH
2V8
2.7
2.8
2.95
V
VOL
2V8 - -
0.4
V
Signal
Pin Number
I/O
I/O Type
Descri ption
WISMO_READY
7 O 2V8
AirPrime WISMO218 ready
indication
3.14. WISMO_READY Indication
This signal indicates the ready status of the AirPrime WISMO218 after powering on. Please note that
there is an initial positive pulse of less than 200ms during power ON. For details, please refer to
Figure 31 Power-ON Sequence (no PIN code activated). Once the AirPrime WISMO218 is properly
powered ON, the WISMO_READY pin will set to HIGH level to acknowledge the successful powering
ON of the AirPrime WISMO218 before it is ready to operate.
On the other hand, the level will go LOW before powering off.
3.14.1. Features
Table 27: Electrical Characteristics of the Signal
3.14.2. Pin Description
Table 28: WISMO_READY Indication Pin Descriptions
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Interfaces
Parame ter
Mi nimum
Typ
Maximum
Unit
VCC_2V8
Output voltage
2.70
2.80
2.95
V
Output Current
Full-power mode
- - 50
mA
Sleep mode
- - 3
mA
Signal
Pin Number
I/O
I/O Type
Descri ption
VCC_2V8
46 O Supply
Digital supply
3.15. VCC_2V8 Output
The VCC_2V8 output can only be used for pull-up resistor(s) and as a reference supply.
This voltage supply is available when the AirPrime WISMO218 is switched on.
3.15.1. Features
Table 29: Electrical Characteristics of the Signals
3.15.2. Pin Description
Table 30: VCC_2V8 Pin Descriptions
3.15.3. Application
This digital power supplies are mainly used to:
Pull-up signals such as I/O
Supply the digital transistors driving LEDs
Act as a voltage reference for ADC interface AUX-ADC0
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Parame ter
Mi nimum
Typ
Maximum
Unit
Input voltage
-
3.0 - V
Input current consumption*
-
2.5 - µA
Output voltage
2.82
3.0
3.18
V
Max charging current (@VBATT=3.6V)
-
0.6 - mA
Signal
Pin Number
I/O
I/O Type
Descri ption
BAT-RTC
6
I/O
Supply
RTC Back-up supply
3.16. BAT-RTC (Backup Battery)
The AirPrime WISMO218 provides an input/output to connect a Real Time Clock power supply.
3.16.1. Features
This pin is used as a back-up power supply for the internal Real Time Clock. The RTC is supported by
the AirPrime WISMO218 when VBATT is available but a back-up power supply is needed to save
date and hour when VBATT is switched off.
If the RTC is not used, this pin can be left open.
If VBATT is available, the back-up battery can be charged by the internal 3.0V power supply regulator
via a 2K resistor implemented inside the AirPrime WISMO218.
Table 31: Electrical Characteristics of the Signal
* Provided by an RTC back-up battery when the AirPrime WISMO218 is off and VBATT = 0V.
3.16.2. Pin Description
Table 32: BAT-RTC Pin Descriptions
3.16.3. Application
The Back-up Power Supply can be provided by any of the following:
A super capacitor
A non rechargeable battery
A rechargeable battery cell
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3.16.3.1. Super Capacitor
Figure 33. RTC Supplied by a Gold Capacitor
Estimated range with 0.47 Farad Gold Cap: 25 minutes minimum.
Note: The Gold Capacitor maximum voltage is 3.9V.
3.16.3.2. Non-Rechargeable Battery
Figure 34. RTC Supplied by a Non Rechargeable Battery
The diode D1 is mandatory to prevent the non rechargeable battery from being damaged.
Estimated range with 85 mAh battery: 800 hours minimum.
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3.16.3.3. Rechargeable Battery Cell
Figure 35. RTC Supplied by a Rechargeable Battery Cell
Rechargeable battery cell: Sanyo ML614
Estimated range with fully charged 3.4mAh rechargeable battery: at least 7 days.
Caution: Before battery cell assembly, ensure that cell voltage is lower than 3.0V to avoid damaging the
AirPrime WISMO218.
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AirPrime WISMO218 Sta te
TX_CTRL St atus
During TX burst
Low
No TX
High
Parame ter
Condit ion
Mi nimum
Typ.
Maximum
Unit
VOH 2.6 - 2.95
V
VOL - - 0.4
V
T
advance
@500mA
-
18 - µs
@1A
-
27 - µs
T
delay
- 11 - µs
3.17. TX_CTRL Signal for TX Burst Indication
3.17.1. Features
The TX_CTRL signal is a 2.8V indication signal for TX Burst with a 100K pull-up resistor
implemented inside the AirPrime WISMO218 embedded module.
Table 33: TX_CTRL Status
During TX burst, there will be higher current drain from the VBATT power supply which causes a
voltage drop. This voltage drop from VBATT is a good indication of a high current drain situation
during TX burst.
The blinking frequency is about 216Hz.
The output logic low duration, T
T
duration
= T
+ (0.577ms x number of TX slots) + T
advance
, depends on the number of TX slots and is computed as follows:
duration
Figure 36. TX_CTRL State During TX Burst
Table 34: Electrical Characteristics of the Signal
delay
.
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Signal
Pin
Number
I/O
I/O Type
Reset State
Descri ption
TX_CTRL
18 O 2V8
1
TX Burst indication
3.17.2. Pin Description
Table 35: TX_CTRL Signal Pin Descriptions
3.17.3. Application
The TX burst indication signal, TX_CTRL, can be used to drive a LED through a transistor. It will then
be a good visual indicator for any TX activities.
Figure 37. Example of TX Status Implementation
The value of R607 can be harmonized depending on the LED (D605) characteristics.
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Parame ter
Mi nimum
Typ
Maximum
Unit
~RESET
Input Impedance ( R )*
-
100K
-
Input Impedance (C)
-
10nF
F
Cancellation time (Ta)
at power up only
-
38 - ms
VH**
1.57
- - V
VIL - 0
1.2
V
VIH
1.96
2.8
--
V
Signal
Pin Number
I/O
I/O Type
Descri ption
~RESET
12
100K Pull-up
2V8
AirPrime WISMO218
Reset
3.18. Reset
The AirPrime WISMO218 has an input ~RESET pin. This is a hardware reset and should only be
used for emergency reset. The ~RESET pin should be kept at low level for at least 500µs to
guarantee a proper reset to take place.
3.18.1. Feature
The ~RESET signal has a 100K internal pull up resistor to VCC_2V8.
Figure 38. Reset Timing
Table 36: Electrical Characteristics of the Signals
* Internal pull up resistance
** V
Hysterisis Voltage
H :
3.18.1.1. Sequence After an External Reset Event (~RESET)
To activate the « emergency » reset sequence, the ~RESET signal has to be set to LOW level
manually, for example, by a push button.
3.18.2. Pin Description
Table 37: Reset Pin Descriptions
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Interfaces
GND
1
2
3
Push button
~RESET
GND
~RESET
Reset
command
T1
Rohm DTC144EE
Reset Comm and
~RESET
Oper ating Mode
1 0 Reset activated
0 1 Reset inactive
3.18.3. Application
If the « emergency » reset is used, it has to be driven by an open collector or an open drain output
(due to the internal pull-up resistor embedded into the AirPrime WISMO218) as shown in the figure
below.
Figure 39. Example of ~RESET Pin Connection with Push Button Configuration
Figure 40. Example of ~RESET Pin Connection with Transistor Configuration
An open collector or open drain transistor can be used to drive the ~RESET pin. If an open collector is
chosen, the recommended digital transistor to use for T1 is the DTC144EE from ROHM.
Table 38: Reset Commands
Note: It is recommended to add a varistor (AVL5M02200) on the ~RESET pin in order to enhance the ESD
immunity.
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Characteri stic
AirPrime WISMO218
E-GSM 900
DCS 1800
TX Frequency
880 to 915 MHz
1710 to 1785 MHz
RX Frequency
925 to 960 MHz
1805 to 1880 MHz
3.19. RF Interface
The impedance is 50 nominal and the DC resistance is 0.
3.19.1. RF Connection
The RF input/output of the AirPrime WISMO218 is through one of the castellation pins (Pin 21). A
50 stripline can be used to connect to standard RF connectors such as SMA, UFL, etc. for antenna
connection.
Note: The antenna cable and connector should be chosen in order to minimize loss in the frequency bands
used for GSM900MHz and 1800MHz.
0.5dB can be considered as a maximum value for loss between the AirPrime WISMO218 and an
external connector.
3.19.2. RF Performances
RF performances are compliant with the ETSI recommendation GSM 05.05.
The main parameters for the Receiver are:
E-GSM900 Reference Sensitivity = -109 dBm (typ.)
DCS1800 Reference Sensitivity = -109 dBm (typ.)
Selectivity @ 200 kHz : > +9 dBc
Selectivity @ 400 kHz : > +41 dBc
Linear dynamic range: 63 dB
Co-channel rejection: >= 9 dBc
The main parameters for the Transmitter are:
Maximum output power (EGSM): 33 dBm +/- 2 dB at ambient temperature
Maximum output power (GSM1800): 30 dBm +/- 2 dB at ambient temperature
Minimum output power (EGSM): 5 dBm +/- 5 dB at ambient temperature
Minimum output power (GSM1800): 0 dBm +/- 5 dB at ambient temperature
3.19.3. Antenna Specifications
The antenna must fulfill the requirements listed in the table below.
The optimum operating frequency depends on the application. A dual Band antenna will work in these
frequency bands and should have the following characteristics:
Table 39: Antenna Specifications
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Interfaces
Characteri stic
AirPrime WISMO218
Impedance
50
VSWR
Rx max
1.5 :1
Tx max
1.5 :1
Typical radiated gain
0dBi in one direction at least
Castellation pin for ANT
50 RF line
Caution: Sierra Wireless strongly recommends working with an antenna manufacturer either to develop an
antenna adapted to the application or to adapt an existing solution to the application. Both the
mechanical and electrical antenna adaptations are one of the key issues in the design of the GSM
terminal.
The RF antenna connection uses one of the castellation pins of the AirPrime WISMO218, with
grounded castellation pins at both sides.
This castellation pin must be connected to an RF 50 line, in order to protect the antenna line from
the noise coming from base-band signals.
Figure 41. Example of an RF 50 line
This 50 line is surrounded by two ground planes in order to protect this antenna line from noise.
The length of the line shouldn’t be too long (more than a few centimeters) because of RF insertion
loss. The width of the line must be calculated in order to ensure a 50 characteristic impedance.
For this same reason, the RF embedded line should likewise be kept about 1cm away from any
(noisy) baseband signal in order to ensure a good RX sensitivity level.
The other end of the RF 50 line can be connected to an RF connector or a soldering pad in order to
connect an antenna.
It is also possible to use an antenna chip or to design a PCB antenna directly on the application
board.
The ANT pin of the AirPrime WISMO218 is ESD protected, for both ±4KV contact and ±8KV air
discharge.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 77
4. Consumption Measurement Procedure
This chapter describes the consumption measurement procedure used to obtain the AirPrime
WISMO218 consumption specification.
The AirPrime WISMO218 consumption specification values are measured for all operating modes
available on the product.
Consumption results are highly dependent on the hardware configuration used during measurement.
This chapter also describes the hardware configuration settings that must be used to obtain optimum
consumption measurements.
4.1. Hardware Configuration
The following hardware configuration includes both the measurement equipment and the AirPrime
WISMO218 with its socket-up board on the AirPrime WS Series Development Kit.
4.1.1. Equipment
Four devices are used to perform consumption measurement:
A communication tester
A current measuring power supply
A standalone power supply
A computer, to control the AirPrime WISMO218 and save measurement data
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Consumption Measurement Procedure
Device
Manufact urer
Refere nce
Notes
Communication Tester
Rhode & Schwartz
CMU 200
Quad Band
GSM/DCS/GPRS
Current measuring
power supply
Agilent
66321B
Used for VBATT (for AirPrime
WISMO218 alone)
Figure 42. Typical hardware configuration
The communication tester is a CMU 200 from Rhode & Schwartz. This tester offers all GSM/GPRS
network configurations required and allows a wide range of network configurations to be set.
The AX502 standalone power supply is used to supply all motherboard components except the
AirPrime WISMO218. The goal is to separate the AirPrime WS Series Development Kit board
consumption from the AirPrime WISMO218 consumption - which is measured by the other power
supply, the 66321B “current measuring power supply”.
The “current measuring power supply” is also connected and controlled by the computer (GPIB
control not shown in the previous figure).
A SIM must be inserted in the AirPrime WS Series Development Kit during all consumption
measurements.
Table 40: Equipment Reference List
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Product Technical Specification &
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Consumption Measurement Procedure
Device
Manufact urer
Refere nce
Notes
Stand alone power
supply
Metrix
AX502
Used for VBAT (for boards peripherals)
4.1.2. AirPrime WS Series Development Kit
The AirPrime WS Series Development Kit is used as a basis for the AirPrime WISMO218
measurement via an adaptor board. The AirPrime WS Series Development Kit can be used to
perform consumption measurement using several settings. For the list and corresponding description
of the settings, see document [3] AirPrime WS Series Development Kit User Guide and document [1]
AirPrime WISMO218 Hardware Presentation.
The AirPrime WS Series Development Kit can be replaced by AirPrime Development Kit WMP100
once a suitable socket-up board is available.
The AirPrime WISMO218 is only powered by VBATT. The AirPrime WS Series Development Kit
board is powered by the standalone power supply at VBAT. It is for this reason that the link between
VBATT and VBAT (J605) must be opened (by removing the solder at the top of the board in the
SUPPLY area). Note the following information regarding both power supplies.
VBATT is powered by the current measuring power supply (66321B)
VBAT is powered by the standalone power supply (AX502) through TP602
Also take note of the following additional configuration/settings:
The R600 resistor and the D603 and D604 diodes (around the BAT-TEMP connector) must
be removed.
The UART2 link is not used; therefore, J201, J202, J203, J204 must be opened (by removing
the solder).
The “FLASH-LED” must be not used, so J602 must be opened (by removing the solder).
The USB link is not used, therefore J301, J302, J303, J304, J305 must be opened (by
removing the solder).
The audio is not used, therefore J702, J703, J704, J705, J605 must be opened (by removing
the solder).
There is no SIM detect feature on the AirPrime WISMO218; therefore, J403 must be opened
(by removing the soldered).
Charging is not used; therefore, R602 must be removed.
C600 and R607 must be removed to avoid unexpected current consumption.
The switch, BOOT (around the “CONFIG” area), must be set to the OFF position.
The goal of the settings listed above is to eliminate all bias current from VBATT and to supply the
entire board (except the AirPrime WISMO218) using VBAT only.
4.1.3. Socket-Up Board Used
There is an adaptor board which is used to adapt the AirPrime WISMO218 to work on the AirPrime
WS Series Development Kit. It is called the socket-up board (WM0801706-020-20).
On this socket up board, the soldering point of J203, J204, JP101, JP102, JP103, JP104, JP105,
JP106 and JP107 must be opened.
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Consumption Measurement Procedure
4.1.4. SIM Cards Used
Consumption measurement may be performed with either 3-Volt or 1.8-Volt SIM cards. However, all
specified consumption values are for a 3-Volt SIM card.
Caution: The SIM card’s voltage is supplied by the AirPrime WISMO218’s power supply. Consumption
measurement results may vary depending on the SIM card used.
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Consumption Measurement Procedure
4.2. Software Configurations
This section discusses the software configuration for the equipment(s) used and the AirPrime
WISMO218 settings.
4.2.1. AirPrime WISMO218 Configuration
The AirPrime WISMO218 software configuration is simply performed by selecting the operating mode
to be used to perform the measurement.
A description of the operating modes and the procedure used to change the operating mode are given
in the appendix of document [2] AirPrime WISMO218 AT Commands Manual.
An overview of the AirPrime WISMO218 operating modes is given below:
OFF Mode
Alarm Mode
Idle Mode
Connected Mode
Transfer Mode class 8 (4Rx/1Tx) (in GPRS mode)
Transfer Mode class 10 (3Rx/2Tx) (in GPRS mode)
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Consumption Measurement Procedure
Oper at ing Mode
Communication Tester Conf igur ation
OFF Mode
N/A
Alarm Mode
N/A
Idle Mode
Paging 9 (Rx burst occurrence ~2s)
Paging 2 (Rx burst occurrence ~0,5s)
Connected Mode
900 MHz
PCL5 (TX power 33dBm)
PCL19 (TX power 5dBm)
1800MHz
PCL0 (TX power 30dBm)
PCL15 (TX power 0dBm)
GPRS
Transfer Mode class 8
(4Rx/1Tx)
900 MHz
Gam.3 (TX power 33dBm)
Gam.17 (TX power 5dBm)
1800MHz
Gam.3 (TX power 30dBm)
Gam.18 (TX power 0dBm)
Transfer Mode class 10
(3Rx/2Tx)
900 MHz
Gam.3 (TX power 33dBm)
Gam.17 (TX power 5dBm)
1800MHz
Gam.3 (TX power 30dBm)
Gam.18 (TX power 0dBm)
4.2.2. Equipment Configuration
The communication tester is set according to the AirPrime WISMO218 operating mode.
Paging during idle modes, TX burst power, RF band and GSM/DCS/GPRS may be selected on the
communication tester.
Listed in the table below is the network analyzer configuration according to operating mode:
Table 41: Operating Mode Information
The standalone power supply may be set from 3.2V to 4.8V.
The power supply (VBATT) used for measurement may be set from 3.2V to 4.8V according to the
AirPrime WISMO218 VBATT specifications.
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Product Technical Specification &
Customer Design Guidelines
Consumption Measurement Procedure
AirPrime WISMO218 Power Consumption
Oper ating Mode
Parame ters
I
av er age
I
pe ak
Unit
VBATT=4.8V
VBATT=3.6V
VBATT=3.2V
Off Mode (AirPrime WISMO218 stand alone)
NA
µA
Off Mode (using application note : Very Low
Power Consumption*)
NA
µA
Idle Mode**
Paging 2 (Rx burst occurrence
~0.5s)
570
mA
Paging 9 (Rx burst occurrence
~2s)
570
mA
Connected
Mode
900 MHz
PCL5 (TX power
33dBm)
1400
TX
mA
PCL19 (TX power
5dBm)
220 TX
mA
1800MHz
PCL0 (TX power
30dBm)
950
TX
mA
PCL15 (TX power
0dBm)
200
TX
mA
GPRS
Transfer
Mode
class 8
(4Rx/1Tx)
900 MHz
Gam.3 (TX power
33dBm)
1400
TX
mA
Gam.17 (TX power
5dBm)
220
TX
mA
1800 MHz
Gam.3 (TX power
30dBm)
950 TX
mA
Gam.18 (TX power
0dBm)
200 TX
mA
Transfer
Mode
class 10
(3Rx/2Tx)
900 MHz
Gam.3 (TX power
33dBm)
1450
TX
mA
Gam.17 (TX power
5dBm)
240
TX
mA
1800 MHz
Gam.3 (TX power
30dBm)
970
TX
mA
Gam.18 (TX power
0dBm)
220
TX
mA
4.3. Template
This template may be used for consumption measurement for all modes and configurations available.
Three VBATT voltages are measured: 3.2V, 3.6V and 4.8V; and the minimum/maximum RF
transmission power configurations are also set and measured.
Table 42: AirPrime WISMO218 Power Consumption
* The application note “Very Low Power Consumption” (Reference: WA_DEV_GEN_APN_020-003) can be found
on the Sierra Wireless website (under the Developer section).
** Idle Mode consumption depends on the SIM card used. Some SIM cards respond faster than others, in which
case the longer the response time is, the higher the consumption is.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 84
5. Technical Specifications
5.1. Castellation Connector Pin Configuration
Figure 43. AirPrime WISMO218 Pin Configuration
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 85
Product Technical Specification &
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Technical Specifications
Pin
#
Signal
Descri ption
I/O
Pin
#
Signal
Descri ption
I/O
1
SPKP
Speaker output positive
32 ohms
Analog
24
GPIO1
2.8V GPIO
I/O 2 SPKN
Speaker output
negative 32 ohms
Analog
25
SPI-IRQ
2.8V SPI interrupt
request input
I 3 MICP
Microphone input
positive
Analog
26
GND
Ground
Ground
4
MICN
Microphone input
negative
Analog
27
NC
Not connected
-
5
AUX_ADC0
Analog to digital
converter
I
28
GND
Ground
Ground
6
BAT-RTC
Power supply for RTC
backup
I
29
VBATT
Power supply
I
7
WISMO_READY
2.8V WISMO Ready
O
30
VBATT
Power supply
I
8
SIM-VCC
SIM power supply
O
31
GND
Ground
Ground
9
SIM-CLK
SIM clock
O
32
NC
Not connected
-
10
SIM-IO
SIM data
I/O
33
NC
Not connected
-
11
~SIM-RST
SIM reset
O
34
BUZZER
2.8V Buzzer PWM2
O
12
~RESET
input reset signal
I
35
PWM1
2.8V DC PWM 1
O
13
SPI-IO
2.8V SPI data input
I/O
36
PWM0
2.8V DC PWM 0
O
14
SPI-O
2.8V SPI data output
O
37
On/~OFF
Power On control
signal
I
15
SPI-CLK
2.8V SPI clock output
O
38
CT103/TXD*
2.8V UART1: Transmit
data
I
16
GPIO3
2.8V GPIO
I/O
39
~CT105/RTS*
2.8V UART1: Request
to send
I
17
~SPI-CS
2.8V SPI chip select
output
O
40
CT104/RXD*
2.8V UART1: Receive
data
O
18
TX_CTRL
2.8V TX Burst Indicator
O
41
~CT106/CTS*
2.8V UART1: Clear to
send
O
19
GPIO5
2.8V GPIO
I/O
42
~CT107/DSR
2.8V UART1: Data set
ready
O
20
GND
Ground
Groun
d
43
~CT109/DCD
2.8V UART1: Data
carrier detect
O
21
ANT
Radio antenna
connection
I/O
44
~CT108/DTR
2.8V UART1: Data
terminal ready
I
22
GND
Ground
Groun
d
45
~CT125/RI
2.8V UART1: Ring
indicator
O
23
GND
Ground
Groun
d
46
VCC_2V8
2.8V power supply
from the embedded
module
O
5.2. Castellation Pin
5.2.1. Pin-Out Description
* UART signal names are according to PC view.
* The I/O direction information only concerns the nominal signal. When the signal is configured in GPIO, it can
either be an Input or an Output.
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Product Technical Specification &
Customer Design Guidelines
Technical Specifications
Pin
#
Signal
Recom men de d Connecti on when not Used
Pin
#
Signal
Recom m ended Connection
when not Used
1
SPKP
open
24
GPIO1
open
2
SPKN
open
25
SPI-IRQ
PCB test point
3
MICP
open
26
GND
Ground
4
MICN
open
27
NC
Not connected
5
AUX_ADC0
Ground
28
GND
Ground
6
BAT-RTC
open
29
VBATT
Power supply
7
WISMO_READY
open
30
VBATT
Power supply
8
SIM-VCC
SIM power supply
31
GND
Ground
9
SIM-CLK
SIM clock
32
NC
Not connected
10
SIM-IO
SIM data
33
NC
Not connected
11
~SIM-RST
SIM reset
34
BUZZER
open
12
~RESET
open
35
PWM1
open
13
SPI-IO
PCB test point
36
PWM0
open
14
SPI-O
PCB test point
37
On/~OFF
Power On control signal
15
SPI-CLK
PCB test point
38
CT103/TXD*
2.8V UART1: Transmit data
16
GPIO3
open
39
~CT105/RTS*
Connect to ~CT106/CTS
17
~SPI-CS
PCB test point
40
CT104/RXD*
2.8V UART1: Receive data
18
TX_CTRL
not connected
41
~CT106/CTS*
Connect to ~CT105/RTS*
19
GPIO5
open
42
~CT107/DSR
Connect to ~CT108/DTRNote 1
20
GND
Ground
43
~CT109/DCD
open
21
ANT
Radio antenna connection
44
~CT108/DTR
Connect to ~CT107/DSR Note 1
22
GND
Ground
45
~CT125/RI
open
23
GND
Ground
46
VCC_2V8
open
5.2.2. Recommended Connection When Not Used
The table below gives the recommended connection for any unused pins.
Note 1
: Please refer to the recommendations specified in section 3.6.2 Pin Description regarding the connection
between DSR and DTR.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 87
Product Technical Specification &
Customer Design Guidelines
Technical Specifications
5.3. PCB Specification for Application Board
In order to save costs for simple applications, a cheap PCB structure can be used for the application
board of the AirPrime WISMO218. A 4-layer through-hole type PCB structure can be used.
Figure 44. PCB Structure Example for the Application Board
Due to the limited layers of 4-layer PCBs, sensitive signals like audio, SIM and clocks cannot be
protected by 2 adjacent ground layers. As a result, during PCB layout, care must be taken for these
sensitive signals, by avoiding coupling to noisy baseband through adjacent layers.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 88
Product Technical Specification &
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Technical Specifications
Abbreviati on
Defi nition
IEC
International Electro technical Commission
ISO
International Organization for Standardization
Docum ent
Current
Version
Title
IEC6006826
7.0
Environmental testing - Part 2.6: Test FC: Sinusoidal Vibration.
IEC60068234
73
Basic environmental testing procedures part 2: Test FD: random vibration
wide band - general requirements
Cancelled and replaced by IEC60068-2-64. For reference only.
IEC60068264
2.0
Environmental testing - part 2-64: Test FH: vibration, broadband random and
guidance.
IEC60068232
2.0
Basic environmental testing procedures - part 2: Test ED: (procedure 1)
(withdrawn & replaced by IEC60068-2-31).
IEC60068231
2.0
Environmental testing part 2-31: Test EC: rough handling shocks, primarily for
equipment-type specimens.
IEC60068229
2.0
Basic environmental testing procedures - part 2: Test EB and guidance: bump
Withdrawn and replaced by IEC60068-2-27. For reference only.
IEC60068227
4.0
Environmental testing - part 2-27: Test EA and guidance: shock.
IEC60068214
6.0
Environmental testing - part 2-14: Test N: change of temperature.
IEC6006822
5.0
Environmental testing - part 2-2: Test B: dry heat.
IEC6006821
6.0
Environmental testing - part 2-1: Test A: cold.
IEC60068230
3.0
Environmental testing - part 2-30: Test DB: damp heat, cyclic (12 h + 12 h
cycle).
IEC6006823
69 w/A1
Basic environmental testing procedures part 2: Test CA: damp heat, steady
State
Withdrawn and replaced by IEC60068-2-78. For reference only.
IEC60068278
1.0
Environmental testing part 2-78: Test CAB: damp heat, steady state.
5.4. Reliability Compliance and Recommended Standards
5.4.1. Reliability Compliance
The AirPrime WISMO218 embedded module connected on a development kit board application is
compliant with the following requirements.
Table 43: Standards Conformity for the AirPrime WISMO218 Embedded Module
5.4.2. Applicable Standards Listing
The table hereafter gives the basic list of standards applicable to the AirPrime WISMO218 embedded
module.
Note: References to any features can be found from these standards.
Table 44: Applicable Standards and Requirements
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 89
Product Technical Specification &
Customer Design Guidelines
Technical Specifications
Docum ent
Current
Version
Title
IEC60068238
2.0
Environmental testing - part 2-38: Test Z/AD: composite temperature/humidity
cyclic test.
IEC60068240
1.0 w/A1
Basic environmental testing procedures - part 2: Test Z/AM combined
cold/low air pressure tests.
ISO167501
2ND
Road vehicles - environmental conditions and testing for electrical and
electronic equipment - part 1: general.
ISO167502
2ND
Road vehicles - environmental conditions and testing for electrical and
electronic equipment - part 2: electrical loads.
ISO167503
2ND
Road vehicles - environmental conditions and testing for electrical and
electronic equipment - part 3: mechanical loads.
ISO167504
2ND
Road vehicles - environmental conditions and testing for electrical and
electronic equipment - part 4: climatic loads.
IEC60529
2.1 w/COR2
Degrees of protection provided by enclosures (IP code).
IEC60068217
4.0
Basic environmental testing procedures - part 2: Test Q: sealing.
IEC60068218
2.0
Environmental testing - part 2-18: Tests - R and guidance: water.
IEC60068270
1.0
Environmental testing - part 2: tests - test XB: abrasion of markings and
letterings caused by rubbing of fingers and hands.
IEC60068268
1.0
Environmental testing - part 2: tests - test l: dust and sand.
IEC60068211
3.0
Basic environmental testing procedures, part 2: test KA: salt mist.
IEC60068260
2.0
Environmental testing - part 2: Test KE: flowing mixed gas corrosion test.
IEC60068252
2.0 w/COR
Environmental testing - part 2: Test KB: salt mist, cyclic (sodium chloride
solution).
Condit ions
Tem per atur e Range
Operating / Class A
-25 °C to +75°C
Operating / Class B
-40 °C to +85°C
Storage
-40 °C to +85°C
5.4.3. Environmental Specifications
The AirPrime WISMO218 embedded module is compliant with the operating classes listed in the table
below. The ideal temperature range of the environment for each operating class is also specified.
Table 45: Operating Class Temperature Range
5.4.3.1. Function Status Classification
5.4.3.1.1. Class A
The AirPrimeWISMO218 remains fully functional, meeting GSM performance criteria in accordance
with ETSI requirements, across the specified temperature range.
5.4.3.1.2. Class B
The AirPrime WISMO218 remains fully functional across the specified temperature range. Some GSM
parameters may occasionally deviate from the ETSI specified requirements and this deviation does
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 90
Product Technical Specification &
Customer Design Guidelines
Technical Specifications
WISMO218 ENVIRONNEMENTAL CLASSES
TYPE OF TEST STANDARDS STORAGE TRANSPORTATION OPERATING (PORT USE)
Class 1.2 Class 2.3 Class 7.3
Cold IEC 68-2.1 -25° C 72 h -40° C 72 h -20° C (GSM900) 16 h
Ab test -10° C (GSM1800/1900) 16h
Dry heat IEC 68-2.2 +70° C 72 h +70° C 72 h +55° C 16 h
Bb test
Change of temperature IEC 68-2.14 -40° / +30° C 5 cycles -20° / +30° C (GSM900) 3 cycles
Na/Nb test t1 = 3 h -10° / +30° C (GSM1800/1900):
3 cycles t1 = 3 h
Damp heat IEC 68-2.30 +30° C 2 cycles +40° C 2 cycles +40° C 2 cycles
cyclic Db test
90% - 100% RH
90% - 100% RH
90% - 100% RH
variant 1 variant 1 variant 1
Damp heat IEC 68-2.56 +30° C 4 days +40° C 4 days +40° C 4 days
Cb test
Sinusoidal vibration IEC 68-2.6 5 - 62 Hz : 5 mm / s
Fc test 62 - 200Hz : 2 m / s2
3 x 5 sweep cycles
5 - 20 Hz : 0.96 m2 / s3 10 -12 Hz : 0.96 m2 / s3
Random vibration IEC 68-3.36 20 - 500Hz : - 3 dB / oct 12 - 150Hz : - 3 dB / oct
wide band Fdb test 3 x 10 min 3 x 30 min
not affect the ability of the AirPrime WISMO218 to connect to the cellular network and be fully
functional, as it does within the Class A range.
The detailed climatic and mechanics standard environmental constraints applicable to the AirPrime
WISMO218 are listed in the table below:
Figure 45. Environmental classes
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 91
Product Technical Specification &
Customer Design Guidelines
Technical Specifications
5.5. Mechanical Specifications
5.5.1. Physical Characteristics
The AirPrime WISMO218 has a nearly-complete self-contained shield.
Overall dimensions: 25.0 x 25.0 x 2.8 mm (excluding label thickness)
Weight: 3.8g
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 92
Product Technical Specification &
Customer Design Guidelines
Technical Specifications
5.5.2. AirPrime WISMO218 Dimensions
Figure 46. Castellation Pin Dimension and Location
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 93
Product Technical Specification &
Customer Design Guidelines
Technical Specifications
Figure 47. AirPrime WISMO218 Dimensions
5.5.3. Recommended PCB Landing Pattern
Refer to document [4] Customer Process Guideline for AirPrime WS Series.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 94
6. Peripheral Devices References
6.1. General Purpose Connector
The general purpose connector is a 46-pin castellation connector with a 1.5mm pitch.
For recommendations of PCB decal on the application board, please refer to document [4] Customer
Process Guideline for AirPrime WS Series.
6.2. SIM Card Reader
Listed below are the recommended SIM Card Readers to use with the AirPrime WISMO218.
ITT CANNON CCM03 series (see http://www.ittcannon.com )
AMPHENOL C707 series (see http://www.amphenol.com )
JAE (see http://www.jae.co.jp/e-top/index.html )
Drawer type:
MOLEX 99228-0002 (connector) / MOLEX 91236-0002 (holder) (see http://www.molex.com )
Note: As the AirPrime WISMO218 has no SIM detect feature, the CC4 and CC8 pin should be left open.
6.3. Microphone
Microphones can be obtained from the following recommended suppliers:
HOSIDEN
PANASONIC
PEIKER
6.4. Speaker
Speakers can be obtained from the following recommended suppliers:
SANYO
HOSIDEN
PRIMO
PHILIPS
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 95
Product Technical Specification &
Customer Design Guidelines
Peripheral Devices References
6.5. Antenna Cable
Listed below are the recommended antenna cables to mount on the AirPrime WISMO218:
RG178
RG316
6.6. GSM Antenna
GSM antennas and support for antenna adaptation can be obtained from manufacturers such as:
ALLGON (http://www.allgon.com )
HIRSCHMANN (http://www.hirschmann.com/ )
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 96
7. Noises and Design
7.1. EMC Recommendations
The EMC tests have to be performed as soon as possible on the application to detect any possible
problems.
When designing a GSM terminal, make sure to take note of the following items:
Possible spurious emissions radiated by the application to the RF receiver in the receiver
band.
ESD protection is mandatory for all peripherals accessible from outside (SIM, serial link,
audio, AUX_ADC0, etc.).
EMC protection on audio input/output (filters against 900MHz emissions).
Biasing of the microphone inputs.
Length of the SIM interface lines (preferably <10cm).
Ground plane: It is recommended to have a common ground plane for analog/digital/RF
grounds.
It is recommended to use a metallic case or plastic casing with conductive paint.
Note: The AirPrime WISMO218 does not include any protection against overvoltage.
7.2. Power Supply
The power supply is one of the key issues in the design of a GSM terminal.
A weak power supply design could affect the following items in particular:
EMC performances
The emissions spectrum
Phase error and frequency error
Note: Careful attention should be paid to the following:
Quality of the power supply: low ripple, PFM or PSM systems should be avoided (a PWM converter is
preferred).
Capacity to deliver high current peaks in a short time (pulsed radio emission).
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 97
8. Certification Compliance and
Domain
Applicable Standard
Safety standard
EN 60950-1 (ed.2006)
Health standard (EMF Exposure Evaluation)
EN 62311 (ed. 2008)
Efficient use of the radio frequency spectrum
EN 301 511 (V 9.0.2)
EMC
EN 301 489-1 (v1.8.1)
EN 301 489-7 (v1.3.1)
EN 301 489-24 (v1.4.1)
FCC
NA
IC
NA
Docum ent
Current
Version
Title
GCF
V3.33.0
GSM Certification Forum - Certification Criteria
NAPRD.03
NA
Overview of PCS Type certification review board (PTCRB) Mobile Equipment
Type Certification and IMEI control
TS 51.010-1
8.3.0
3rd Generation Partnership Project; Technical Specification Group GSM/EDGE
Radio Access Network; Digital cellular telecommunications system (Phase 2+);
Mobile Station (MS) conformance specification; Part 1: Conformance
specification
TS 51.010-2
8.3.0
3rd Generation Partnership Project; Technical Specification Group GSM/EDGE
Radio Access Network; Mobile Station (MS) conformance specification; Part 2:
Protocol Implementation Conformance Statement (PICS) proforma specification
TS 51.010-4
4.14.1
3rd Generation Partnership Project; Technical Specification Group GSM/EDGE
Radio Access Network; Digital cellular telecommunications system (Phase 2+);
Mobile Station (MS) conformance specification; Part 4: SIM Application Toolkit
Conformance specification
EN 301 511
9.0.2
Global System for Mobile Communications (GSM); Harmonised standard for
mobile stations in the GSM 900 and DCS 1800 bands covering essential
requirements under article 3.2 of the R&TTE directive (1999/5/EC)
Recommended Standards
8.1. Certification Compliance
The AirPrime WISMO218 Embedded Module is compliant with the following requirements.
Table 46: Standards Conformity for the AirPrime WISMO218 Embedded Module
8.2. Applicable Standards Listing
The table hereafter gives the basic list of standards applicable for 2G (R99/Rel.4).
Note: References to any features can be found from these standards.
Table 47: Applicable Standards and Requirements for the AirPrime WISMO218 Embedded Module
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 98
Product Technical Specification &
Customer Design Guidelines
Certification Compliance and
Recommended Standards
Docum ent
Current
Version
Title
TS 34.121-1
8.5.0
3rd Generation Partnership Project; Technical Specification Group Radio Access
Network; User Equipment (UE) conformance specification; Radio transmission
and reception (FDD); Part 1: Conformance specification
TS 34.121-2
8.5.0
3rd Generation Partnership Project; Technical Specification Group Radio Access
Network User Equipment (UE) conformance specification; Radio transmission
and reception (FDD); Part 2: Implementation Conformance Statement (ICS)
TS 34.123-1
8.5.0
3rd Generation Partnership Project; Technical Specification Group Terminals;
User Equipment (UE) conformance specification; Part 1: Protocol conformance
specification
This device is to be used only for mobile and fixed applications. The antenna(s) used for this
transmitter must be installed to provide a separation distance of at least 20cm from all persons and
must not be co-located or operating in conjunction with any other antenna or transmitter.
Users and installers must be provided with antenna installation instructions and transmitter operating
conditions for satisfying RF exposure compliance.
Installed in other portable devices, the exposure condition requires a separate equipment
authorization.
IMPORTANT:
Manufacturers of mobile or fixed devices incorporating the AirPrime WISMO218 Embedded Module
are advised to
clarify any regulatory questions,
have their completed product tested, and
include instructions according to the above mentioned RF exposure statements in the end
product user manual.
Please note that changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 99
9. Appendix
9.1. Safety Recommendations (for Information Only)
For the efficient and safe operation of your GSM application based on the AirPrime WISMO218,
please read the following information carefully.
9.1.1. RF Safety
9.1.1.1. General
Your GSM terminal is based on the GSM standard for cellular technology. The GSM standard is
spread all over the world. It covers Europe, Asia and some parts of America and Africa. This is the
most used telecommunication standard.
Your GSM terminal is actually a low power radio transmitter and receiver. It sends out and receives
radio frequency energy. When you use your GSM application, the cellular system which handles your
calls controls both the radio frequency and the power level of your cellular modem.
9.1.1.2. Exposure to RF Energy
There has been some public concern about possible health effects from using GSM terminals.
Although research on health effects from RF energy has focused on the current RF technology for
many years, scientists have begun research regarding newer radio technologies, such as GSM. After
existing research had been reviewed, and after compliance to all applicable safety standards had
been tested, it has been concluded that the product was fit for use.
If you are concerned about exposure to RF energy there are things you can do to minimize exposure.
Obviously, limiting the duration of your calls will reduce your exposure to RF energy. In addition, you
can reduce RF exposure by operating your cellular terminal efficiently by following the guidelines
below.
9.1.1.3. Efficient Terminal Operation
For your GSM terminal to operate at the lowest power level, consistent with satisfactory call quality:
If your terminal has an extendible antenna, extend it fully. Some models allow you to place a call with
the antenna retracted. However, your GSM terminal operates more efficiently with the antenna fully
extended.
Do not hold the antenna when the terminal is « IN USE ». Holding the antenna affects call quality and
may cause the modem to operate at a higher power level than needed.
WA_DEV_W218_PTS_002 Rev 006 April 29, 2010 100
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