Sierra Wireless WISMO228 MODULE User Manual USERS MANUAL 1

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Document Description	USERS MANUAL 1
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Document Title	WISMO228 - Product Technical Specification and Customer Design Guideline
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Document Author:	Sierra Wireless

Product Technical Specification &
Customer Design Guidelines
WISMO228 WIreless Standard MOdem
WA_DEV_W228_PTS_002
001
August 26, 2009
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.
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Product Technical Specification &
Customer Design Guidelines
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.
Copyright
© 2009 Sierra Wireless. All rights reserved.
Trademarks
AirCard® and “Heart of the Wireless Machine®” are filed or registered trademarks of Sierra Wireless.
Watcher® is a trademark of Sierra Wireless, registered in the European Community. Sierra Wireless,
the Sierra Wireless logo, the red wave design, and the red-tipped antenna are trademarks of Sierra
Wireless.
, ®, inSIM®, “YOU MAKE IT, WE MAKE IT WIRELESS®”,
WAVECOM , WISMO , Wireless Microprocessor®, Wireless CPU®, Open AT® are filed or registered
trademarks of Wavecom S.A. in France and/or in other countries.
®
®
Windows® is a registered trademark of Microsoft Corporation.
QUALCOMM® is a registered trademark of QUALCOMM Incorporated. Used under license.
Other trademarks are the property of the respective owners.
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Product Technical Specification &
Customer Design Guidelines
Contact Information
Phone:
Sales Desk:
1-604-232-1488
Hours:
8:00 AM to 5:00 PM Pacific Time
E-mail:
sales@sierrawireless.com
Sierra Wireless
13811 Wireless Way
Post:
Richmond, BC
Canada
V6V 3A4
Fax:
1-604-231-1109
Web:
www.sierrawireless.com
Consult our website for up-to-date product descriptions, documentation, application notes, firmware
upgrades, troubleshooting tips, and press releases:
www.sierrawireless.com
Document Update History
Rev
001
Date
History of the evolution
August 26, 2009
WA_DEV_W228_PTS_002
Rev 001
Creation
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Product Technical Specification &
Customer Design Guidelines
Contents
CONTENTS ......................................................................................................................... 5
LIST OF FIGURES .............................................................................................................. 9
LIST OF TABLES .............................................................................................................. 11
1. REFERENCES .............................................................................................................. 13
Reference Documents ............................................................................................................................ 13
Wavecom Reference Documentation ............................................................................................. 13
List of Abbreviations ............................................................................................................................. 13
2. GENERAL DESCRIPTION ....................................................................................... 19
General Information .............................................................................................................................. 19
Overall Dimensions ......................................................................................................................... 19
Environment and Mechanics .......................................................................................................... 19
RoHS Directive Compliant ....................................................................................................................... 19
Complete Shielding ................................................................................................................................... 19
GSM/GPRS Features ........................................................................................................................ 19
Interfaces ........................................................................................................................................... 20
Firmware ........................................................................................................................................... 20
Connection Interfaces ...................................................................................................................... 20
Functional Description .......................................................................................................................... 21
RF Functionalities............................................................................................................................. 21
Baseband Functionalities ................................................................................................................. 22
3. INTERFACES ............................................................................................................... 23
General Interfaces .................................................................................................................................. 23
Power Supply.......................................................................................................................................... 24
Power Supply Description .............................................................................................................. 24
Electrical Characteristics.................................................................................................................. 25
Pin Description ................................................................................................................................. 25
Application ....................................................................................................................................... 25
Power Consumption .............................................................................................................................. 27
Various Operating Modes ............................................................................................................... 27
Power Consumption Values ........................................................................................................... 28
Consumption Waveform Samples.................................................................................................. 30
Connected Mode Current Waveform ..................................................................................................... 31
Transfer Mode Class 10 Current Waveform .......................................................................................... 32
Idle Mode Page 2 Current Waveform ..................................................................................................... 32
Idle Mode Page 9 Current Waveform ..................................................................................................... 33
Recommendations for Less Consumption ..................................................................................... 33
Electrical Information for Digital I/O ................................................................................................. 34
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SPI Bus for Debug Trace ONLY........................................................................................................... 35
Pin Description ................................................................................................................................. 35
SPI Waveforms ................................................................................................................................. 35
Main Serial Link (UART)...................................................................................................................... 38
Pin Description ................................................................................................................................. 38
5‐wire Serial Interface Hardware Design ............................................................................................... 39
4‐wire Serial Interface Hardware Design ............................................................................................... 39
2‐wire Serial Interface Hardware Design ............................................................................................... 39
Application ....................................................................................................................................... 40
V24/CMOS Possible Design ..................................................................................................................... 41
SIM Interface .......................................................................................................................................... 44
Electrical Characteristics.................................................................................................................. 44
Pin Description ................................................................................................................................. 45
Application ....................................................................................................................................... 46
SIM Socket Connection .................................................................................................................... 46
General Purpose Input/Output ............................................................................................................ 48
Pin Description ................................................................................................................................. 48
Analog to Digital Converter ................................................................................................................. 49
Electrical Characteristics.................................................................................................................. 49
Pin Description ................................................................................................................................. 49
Analog Audio Interface ......................................................................................................................... 50
Microphone Features ....................................................................................................................... 50
Electrical Characteristics ........................................................................................................................... 51
Speaker Features .............................................................................................................................. 52
Electrical Characteristics ........................................................................................................................... 52
Pin Description ................................................................................................................................. 53
Application ....................................................................................................................................... 53
Microphone ................................................................................................................................................ 53
Speaker SPKP ad SPKN ............................................................................................................................ 56
Design Recommendations ............................................................................................................... 57
General ........................................................................................................................................................ 57
Recommended Microphone Characteristics .......................................................................................... 58
Recommended Speaker Characteristics.................................................................................................. 58
Recommended Filtering Components .................................................................................................... 58
Audio Track and PCB Layout Recommendation .................................................................................. 59
Pulse‐Width Modulators (PWMs) ....................................................................................................... 62
Electrical Characteristics.................................................................................................................. 62
Pin Description ................................................................................................................................. 62
Application ....................................................................................................................................... 63
BUZZER Output ..................................................................................................................................... 64
Electrical Characteristics.................................................................................................................. 64
Pin Description ................................................................................................................................. 65
Application ....................................................................................................................................... 65
Low Filter Calculations ............................................................................................................................. 66
Recommended Characteristics................................................................................................................. 66
ON/~OFF Signal ..................................................................................................................................... 68
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Electrical Characteristics.................................................................................................................. 68
Pin Description ................................................................................................................................. 68
Application ....................................................................................................................................... 69
Power ON ................................................................................................................................................... 69
Power OFF .................................................................................................................................................. 70
WISMO_READY Indication ................................................................................................................. 72
Electrical Characteristics.................................................................................................................. 72
Pin Description ................................................................................................................................. 72
VCC_2V8 Output ................................................................................................................................... 73
Electrical Characteristics.................................................................................................................. 73
Pin Description ................................................................................................................................. 73
Application ....................................................................................................................................... 73
BAT‐RTC (Backup Battery)................................................................................................................... 74
Electrical Characteristics.................................................................................................................. 74
Pin Description ................................................................................................................................. 74
Application ....................................................................................................................................... 74
Super Capacitor ......................................................................................................................................... 75
Non‐Rechargeable Battery........................................................................................................................ 75
Rechargeable Battery Cell ......................................................................................................................... 76
TX_CTRL Signal for TX Burst Indication ........................................................................................... 77
Electrical Characteristics.................................................................................................................. 77
Pin Description ................................................................................................................................. 78
Application ....................................................................................................................................... 78
Reset ......................................................................................................................................................... 79
Electrical Characteristics.................................................................................................................. 79
Pin Description ................................................................................................................................. 80
Application ....................................................................................................................................... 80
RF Interface ............................................................................................................................................. 82
RF Connection .................................................................................................................................. 82
RF Performances .............................................................................................................................. 83
Antenna Specifications .................................................................................................................... 83
4. CONSUMPTION MEASUREMENT PROCEDURE ............................................. 85
Hardware Configuration ....................................................................................................................... 85
Equipments ....................................................................................................................................... 85
WISMO218 Development Kit ......................................................................................................... 87
Socket‐Up Board............................................................................................................................... 88
SIM Cards ......................................................................................................................................... 88
Software Configuration......................................................................................................................... 88
WISMO228 Configuration ............................................................................................................... 88
Equipment Configuration ............................................................................................................... 89
Template .................................................................................................................................................. 90
5. TECHNICAL SPECIFICATIONS ............................................................................. 93
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Product Technical Specification &
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Castellation Pins..................................................................................................................................... 93
Pin Configuration ............................................................................................................................. 93
Pin Description ................................................................................................................................. 94
Recommended Connection When Not Used................................................................................. 95
PCB Specifications for the Application Board ................................................................................... 96
Environmental Specifications .............................................................................................................. 97
Function Status Classification ......................................................................................................... 97
Class A ........................................................................................................................................................ 97
Class B ......................................................................................................................................................... 97
Mechanical Specifications .................................................................................................................... 99
Physical Characteristics ................................................................................................................... 99
Recommended PCB Landing Pattern............................................................................................. 99
WISMO228 Dimensions .................................................................................................................. 99
6. RECOMMENDED PERIPHERAL DEVICES ....................................................... 100
General Purpose Connector ................................................................................................................ 100
SIM Card Reader .................................................................................................................................. 100
Microphone ........................................................................................................................................... 100
Speaker .................................................................................................................................................. 100
Antenna Cable ...................................................................................................................................... 101
GSM Antenna ....................................................................................................................................... 101
7. NOISES AND DESIGN ........................................................................................... 102
EMC Recommendations ...................................................................................................................... 102
Power Supply........................................................................................................................................ 102
Overvoltage ........................................................................................................................................... 102
8. APPENDIX ................................................................................................................. 103
Standards and Recommendations ..................................................................................................... 103
Safety Recommendations (for Information Only) .......................................................................... 106
RF Safety ......................................................................................................................................... 106
General Safety ................................................................................................................................. 107
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Product Technical Specification &
Customer Design Guidelines
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 Diagram ..................................................................................................................... 35
Figure 5.
Example of an SPI to UART2 Interface Conversion Implementation ................................. 36
Figure 6.
Example of an RS‐232 Level Shifter Implementation for UART2 ........................................ 37
Figure 7.
Example of RS‐232 Level Shifter Implementation for UART ................................................ 40
Figure 8.
Example of V24/CMOS Serial Link Implementation for a 2‐wire UART............................ 41
Figure 9.
Example of V24/CMOS Serial Link Implementation for a 4‐wire UART............................ 42
Figure 10.
Example of V24/CMOS Serial Link Implementation for a 5‐wire UART............................ 42
Figure 11.
Example of a Full Modem V24/CMOS Serial Link Implementation for a full UART....... 43
Figure 12.
Example of a SIM Socket Implementation ............................................................................... 46
Figure 13.
DC Equivalent Circuit of MIC .................................................................................................... 50
Figure 14.
AC Equivalent Circuit of MIC .................................................................................................... 50
Figure 15.
Equivalent Circuit of SPK ............................................................................................................ 52
Figure 16.
Example of a Differential MIC Connection with an LC Filter .............................................. 54
Figure 17.
Example of a Differential MIC Connection without an LC Filter ........................................ 54
Figure 18.
Example of a Single‐Ended MIC Connection with an LC filter ............................................ 55
Figure 19.
Example of a Single‐Ended MIC Connection without an LC Filter ..................................... 56
Figure 20.
Example of a Differential Speaker Connection ........................................................................ 57
Figure 21.
Example of a Single‐Ended Speaker Connection .................................................................... 57
Figure 22.
Capacitor Soldered in Parallel to the Microphone .................................................................. 58
Figure 23.
Audio Track Design ..................................................................................................................... 60
Figure 24.
Differential Audio Connection ................................................................................................... 60
Figure 25.
Single‐Ended Audio Connection ............................................................................................... 61
Figure 26.
Relative Timing for the PWM Output ....................................................................................... 62
Figure 27.
Example of an LED Driven by the PWM0 or PWM1 Output ............................................... 63
Figure 28.
BUZZER Output ........................................................................................................................... 64
Figure 29.
Example of a BUZZER Implementation ................................................................................... 65
Figure 30.
Example of an LED Driven by the BUZZER Output .............................................................. 67
Figure 31.
Example of the ON/~OFF Pin Connection ............................................................................... 69
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Product Technical Specification &
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Figure 32.
Power‐ON Sequence .................................................................................................................... 69
Figure 33.
Power‐OFF Sequence ................................................................................................................... 70
Figure 34.
RTC Supplied by a Gold Capacitor ........................................................................................... 75
Figure 35.
RTC Supplied by a Non Rechargeable Battery ........................................................................ 75
Figure 36.
RTC Supplied by a Rechargeable Battery Cell......................................................................... 76
Figure 37.
TX_CTRL State During TX Burst ............................................................................................... 77
Figure 38.
Example of a TX Status Implementation .................................................................................. 78
Figure 39.
Reset Timing .................................................................................................................................. 79
Figure 40.
Example of ~RESET Pin Connection with a Push Button Configuration ........................... 80
Figure 41.
Example of ~RESET Pin Connection with a Transistor Configuration ............................... 80
Figure 42.
Example of a 50Ω RF Line ........................................................................................................... 82
Figure 43.
Typical Hardware Configuration .............................................................................................. 86
Figure 44.
WISMO228 Pin Configuration .................................................................................................... 93
Figure 45.
PCB Structure Example for the Application Board................................................................. 96
Figure 46.
WISMO228 Dimensions ............................................................................................................... 99
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Product Technical Specification &
Customer Design Guidelines
List of Tables
Table 1.
Frequency Range for Tx and Rx .............................................................................................. 21
Table 2.
WISMO228 Interfaces................................................................................................................ 23
Table 3.
Input Power Supply Voltage ................................................................................................... 25
Table 4.
Power Supply Pin Description ................................................................................................ 25
Table 5.
WISMO228 Operating Modes.................................................................................................. 27
Table 6.
WISMO228 Power Consumption ............................................................................................ 29
Table 7.
Consumption/Software Driver Recommendations ............................................................. 33
Table 8.
Electrical Characteristics of Digital I/Os ................................................................................ 34
Table 9.
SPI Bus Pin Description ............................................................................................................ 35
Table 10.
Main Serial Link Pin Description ............................................................................................ 38
Table 11.
Electrical Characteristics of the SIM Interface ...................................................................... 44
Table 12.
SIM Interface Pin Description .................................................................................................. 45
Table 13.
SIM Socket Pin Description ...................................................................................................... 46
Table 14.
GPIO Pin Descriptions .............................................................................................................. 48
Table 15.
Electrical Characteristics of the ADC Interface..................................................................... 49
Table 16.
Analog to Digital Converter Pin Description........................................................................ 49
Table 17.
Electrical Characteristics of MIC ............................................................................................. 51
Table 18.
Speaker Details ........................................................................................................................... 52
Table 19.
Electrical Characteristics of SPK.............................................................................................. 52
Table 20.
Analog Audio Interface Pin Description ............................................................................... 53
Table 21.
Electrical Characteristics of the PWM Interface ................................................................... 62
Table 22.
PWM Pin Description................................................................................................................ 62
Table 23.
Electrical Characteristics of the BUZZER Signal .................................................................. 64
Table 24.
BUZZER Pin Description.......................................................................................................... 65
Table 25.
Electrical Characteristics of the ON/~OFF Signal ................................................................. 68
Table 26.
ON/~OFF Signal Pin Description ............................................................................................ 68
Table 27.
Power‐ON Sequence ................................................................................................................. 69
Table 28.
Electrical Characteristics of the WISMO_READY Indication ............................................ 72
Table 29.
WISMO_READY Indication Pin Description ........................................................................ 72
Table 30.
Electrical Characteristics of the VCC_2V8 Signal................................................................. 73
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Product Technical Specification &
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Table 31.
VCC_2V8 Pin Description ........................................................................................................ 73
Table 32.
Electrical Characteristics of the BAT‐RTC Signal ................................................................. 74
Table 33.
BAT‐RTC Pin Description ........................................................................................................ 74
Table 34.
TX_CTRL Status ......................................................................................................................... 77
Table 35.
Electrical Characteristics of the TX_CTRL Signal ................................................................ 77
Table 36.
TX_CTRL Signal Pin Description ............................................................................................ 78
Table 37.
Electrical Characteristics of the Reset Signal......................................................................... 79
Table 38.
Reset Pin Description ................................................................................................................ 80
Table 39.
Reset Commands ....................................................................................................................... 81
Table 40.
Antenna Specifications.............................................................................................................. 83
Table 41.
List of Recommended Equipments ......................................................................................... 87
Table 42.
Operating Mode Information .................................................................................................. 89
Table 43.
WISMO228 Power Consumption ............................................................................................ 90
Table 44.
WISMO228 Castellation Pin Description ............................................................................... 94
Table 45.
Recommended Connection When Not Used ........................................................................ 95
Table 46.
Operating Class Temperature Range ..................................................................................... 97
Table 47.
Environmental Classes.............................................................................................................. 98
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Product Technical Specification &
Customer Design Guidelines
1.
References
Reference Documents
Several documents are referenced throughout this specification. For more details, please consult the
listed reference documents. The WAVECOM documents referenced herein are provided in the
WAVECOM documentation package; however, the general reference documents which are not
WAVECOM owned are not provided in the documentation package.
Wavecom Reference Documentation
WISMO218 Hardware Presentation
Reference: WA_DEV_W218_PTS_001
WISMO218 AT Commands Manual
Reference: WA_DEV_W218_UGD_003
WISMO218 Development Kit User Guide
Reference: WA_DEV_W218_UGD_004
Customer Process Guideline for WISMO Series
Reference: WM_DEV_W218_PTS_001
List of Abbreviations
Abbreviation
Definition
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
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Product Technical Specification &
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Abbreviation
Definition
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
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
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Product Technical Specification &
Customer Design Guidelines
Abbreviation
Definition
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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Product Technical Specification &
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Abbreviation
Definition
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
Négative 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
PCS
PDA
Personal Digital Assistant
PFM
Power Frequency Modulation
PLL
Phase Lock Loop
PSM
Phase Shift Modulation
PWM
Pulse Width Modulation
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Abbreviation
Definition
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
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
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Abbreviation
Definition
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
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Product Technical Specification &
Customer Design Guidelines
2.
General Description
General Information
The WISMO228 is a self‐contained GSM 850/EGSM 900/DCS 1800/PCS 1900 quad‐band module that
was specifically designed for M2M systems deployed all over the world.
Overall Dimensions
•
Length: 25.0 mm
•
Width: 25.0 mm
•
Thickness: 2.8 mm (excluding label thickness)
•
Weight: 3.64 g
Environment and Mechanics
RoHS Directive Compliant
The WISMO228 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)”.
Complete Shielding
All electronic parts of the WISMO228 are nearly‐completely covered in a self‐contained shield.
GSM/GPRS Features
•
2 Watts GSM 850 radio section running under 3.6 Volts
•
2 Watts EGSM 900 radio section running under 3.6 Volts
•
1 Watt DCS 1800 radio section running under 3.6 Volts
•
1 Watt PCS 1900 radio section running under 3.6 Volts
•
Hardware GPRS class 10 capable
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Product Technical Specification &
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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
•
GPIOs
•
ON/~OFF
•
TX burst indicator
•
Module ready indicator
•
Reset
Firmware
•
Drives the WISMO228 via an AT command interface over a serial port
•
Full GSM/GPRS Operating System stack
•
Real Time Clock with calendar
Connection Interfaces
The WISMO228 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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Product Technical Specification &
Customer Design Guidelines
Functional Description
The global architecture of the WISMO228 is shown in the figure below.
Figure 1. Functional Architecture
RF Functionalities
The Radio Frequency (RF) range complies with the Phase II GSM 850/EGSM 900/DCS 1800/PCS 1900
recommendation. The frequency range for the transmit band and receive band are listed in the table
below.
Table 1.
Frequency Range for Tx and Rx
Transmit Band (Tx)
GSM 850
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Rev 001
Receive Band (Rx)
869 to 894 MHz
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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
PCS 1900
1850 to 1910 MHz
1930 to 1990 MHz
The RF part of the WISMO228 is based on a specific dual band chip which includes:
•
a Digital low‐IF receiver
•
a dual‐band LNA (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 quad‐band GSM/GPRS
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.
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3.
Interfaces
General Interfaces
The WISMO228 has a 46‐pin castellation connection, which provides access to all available
interfaces. The following table enumerates the available interfaces on the WISMO228.
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Table 2.
WISMO228 Interfaces
Available Interface
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Driven by
AT
commands
Available Interface
SPI Bus for Debug Trace ONLY
The WISMO228 provides one SPI bus through the castellation pin.
Caution: This interface is only used for monitoring trace for debug purposes.
Pin Description
The following table provides the pin description of the SPI bus.
Table 3.
Pin #
Signal
I/O
SPI Bus Pin Description
I/O Type
Reset State
Description
13
SPI-IO
I/O
2V8
Pull down
SPI Serial input/output
14
SPI-O
2V8
Pull down
SPI Serial input
15
SPI-CLK
2V8
Pull down
SPI Serial Clock
17
~SPI-CS
2V8
Pull up
SPI Enable
25
SPI-IRQ
2V8
Pull down
SPI Interrupt
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 WISMO228 is not open for
application use other than debug trace.
SPI Waveforms
Figure 2. SPI Timing Diagram
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Available Interface
Driven by
AT
commands
SIM Interface
Yes
Error! Reference source not found.
No*
Error! Reference source not found.
Yes
Serial Interface (SPI)
No
Analog to Digital Converter
No*
Pulse-Width Modulators (PWMs)
Yes
ON/~OFF
No
PWM2 for Buzzer Output
Yes
Module Ready Indication
No
VBAT_RTC (Backup Battery)
No
TX Burst Indication Signal
No
Error! Reference source not found.
No
These interfaces will have AT command support in future versions.
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Power Supply
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 these peaks, the ripple (Uripple) on the supply voltage must not exceed a certain limit. Refer to
Table 4 Input Power Supply Voltage for the input power supply voltage values.
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 5 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 (TBDA peak in GSM/GPRS mode) flows with a ratio of:
ƒ
1/8 of the time (around 577μs every 4.615ms for GSM/GPRS class 2)
and
ƒ
1/4 of the time (around 1154μs every 4.615ms for GSM/GPRS class 10)
with the rising time at around 10μs.
•
Internally used to provide, via several regulators, the supply required for the baseband
signals.
Figure 5. Power Supply During Burst Emission
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Electrical Characteristics
Table 4.
Vmin
VBATT2
3.21
Vnom
3.6
Input Power Supply Voltage
Vmax
4.8
ITYP
TBD
Imax
TBD
Ripple max (Uripp)
TBD
1:
This value has to be guaranteed during the burst (with TBDA Peak in GSM or GPRS mode)
2:
The maximum operating Voltage Stationary Wave Ratio (VSWR) is 1.5:1.
Note:
When powering the WISMO228 with a battery, the total impedance (battery + protections + PCB)
should be less than 150mΩ.
Pin Description
Table 5.
Pin Numbers
Power Supply Pin Description
Signal
29,30
VBATT
20,22,23,26,28,31
GND
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 the VBATT.
Figure 6. Reject Filter Diagram
The following tables list the recommended components to use in implementing the reject filter.
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C1, C2:
10μF +/‐20%
Component
Manufacturer
GRM21BR60J106KE19L
MURATA
CM21X5R106M06AT
KYOCERA
JMK212BJ106MG-T
TAYO YUDEN
C2012X5R0J106MT
TDK
L1:
220nH +/‐5%
Component
Manufacturer
0805CS-221XJLC
COILCRAFT
0805G221J E
STETCO
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Power Consumption
The power consumption levels of the WISMO228 vary depending on the operating mode used and
the following sub‐sections describe the power consumption values of the WISMO228 when running
in various operating modes and RF bands.
Various Operating Modes
Refer to the following table for the list of available operating modes on the WISMO228.
Table 6.
Mode
WISMO228 Operating Modes
Description
When VBATT power is supplied to the WISMO228 but it has not yet been powered
ON.
OFF Mode
When alarm clock is set for the WISMO228 with ALL of the following conditions:
Alarm Mode
•
before time is up
•
with AT + CPOF having been entered from a computer that is connected to the
WISMO228
•
with the ON/~OFF signal being left open (remains at HIGH level)
Idle Mode
When the WISMO228 has a location update with a live network but with no
GSM/GPRS connection, while the UART interface is in sleep mode.
Connected Mode
The WISMO228 has GSM voice codec connection with a live network.
Transfer Mode
The WISMO228 has GPRS data transfer connection with a live network.
Note that there are two different methods of entering sleep mode through the AT command,
AT+PSSLEEP.
•
•
AT + PSSLEEP = 0
ƒ
The entry of sleep mode is controlled by the level of the DTR signal and the
firmware.
ƒ
The WISMO228 will never enter sleep mode when the DTR (viewed from the
module side) is of LOW voltage level. On the other hand, the WISMO228 will enter
sleep mode when the DTR (viewed from the module side) is of HIGH voltage level.
ƒ
To wake the WISMO228 up, it is necessary to toggle the DTR (viewed from module
side) from HIGH to LOW voltage level.
ƒ
This method should be used if the application needs to forbid the entry of sleep
mode.
AT + PSSLEEP = 1
ƒ
The entry of sleep mode is controlled just by the firmware.
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ƒ
When the WISMO228 has had no activities for a certain period of time, it will enter
sleep mode automatically, regardless of the DTR level.
ƒ
Any ASCII character on the UART can wake the WISMO228 up.
Refer to the WISMO218 AT Commands Manual for more information about the AT+PSSLEEP
command.
Power Consumption Values
Three VBATT values were used to measure the power consumption of the WISMO228: VBATTmin
(3.2V), VBATTmax (4.8V) and VBATTtyp (3.6V). Both the average current and the maximum current
peaks were also measured for all three VBATT values.
The following consumption values were obtained by performing measurements on WISMO228
samples at a temperature of 25° C with the assumption of a 50Ω RF output.
Note:
Power consumption performance is software related. The results listed below are based on the
software version TBD.
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Table 7.
WISMO228 Power Consumption
WISMO228 Power Consumption
Operating Mode
Parameters
I MIN
average
I NOM
average
I M AX
I M AX peak Unit
average
VBATT=4.8V VBATT=3.6V VBATT=3.2
Off Mode*
TBD
TBD
TBD
TBD
µA
Alarm Mode
TBD
TBD
TBD
TBD
µA
Paging 2 (Rx burst
occurrence ~0.5s)
TBD
TBD
TBD
TBD
mA
Paging 9 (Rx burst
occurrence ~2s)
TBD
TBD
TBD
TBD
mA
PCL5 (TX
power 33dBm)
TBD
TBD
TBD
TBD
mA
PCL19 (TX
power 5dBm)
TBD
TBD
TBD
TBD
mA
PCL5 (TX
power 33dBm)
TBD
TBD
TBD
TBD
mA
PCL19 (TX
power 5dBm)
TBD
TBD
TBD
TBD
mA
PCL0 (TX
power 30dBm)
TBD
TBD
TBD
TBD
mA
PCL15 (TX
power 0dBm)
TBD
TBD
TBD
TBD
mA
PCL0 (TX
power 30dBm)
TBD
TBD
TBD
TBD
mA
PCL15 (TX
power 0dBm)
TBD
TBD
TBD
TBD
mA
Gam.3 (TX
power 33dBm)
TBD
TBD
TBD
TBD
mA
Gam.17 (TX
power 5dBm)
TBD
TBD
TBD
TBD
mA
Gam.3 (TX
power 33dBm)
TBD
TBD
TBD
TBD
mA
Gam.17 (TX
power 5dBm)
TBD
TBD
TBD
TBD
mA
Gam.3 (TX
power 30dBm)
TBD
TBD
TBD
TBD
mA
Idle Mode**
850 MHz
900 MHz
Connected Mode
1800 MHz
1900 MHz
850 MHz
GPRS
Transfer
Mode class
8 (4Rx/1Tx)
900 MHz
1800 MHz
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Gam.18 (TX
power 0dBm)
TBD
TBD
TBD
TBD
mA
Gam.3 (TX
power 30dBm)
TBD
TBD
TBD
TBD
mA
Gam.18 (TX
power 0dBm)
TBD
TBD
TBD
TBD
mA
Gam.3 (TX
power 33dBm)
TBD
TBD
TBD
TBD
mA
Gam.17 (TX
power 5dBm)
TBD
TBD
TBD
TBD
mA
Gam.3 (TX
power 33dBm)
TBD
TBD
TBD
TBD
mA
Gam.17 (TX
power 5dBm)
TBD
TBD
TBD
TBD
mA
Gam.3 (TX
power 30dBm)
TBD
TBD
TBD
TBD
mA
Gam.18 (TX
power 0dBm)
TBD
TBD
TBD
TBD
mA
Gam.3 (TX
power 30dBm)
TBD
TBD
TBD
TBD
mA
Gam.18 (TX
power 0dBm)
TBD
TBD
TBD
TBD
mA
1900 MHz
850 MHz
900 MHz
Transfer
Mode class
10 (3Rx/2Tx)
1800 MHz
1900 MHz
Current consumption in OFF mode is measured with BAT-RTC being left open.
**
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.
Note:
TX
means that the current peak is the RF transmission burst (Tx burst).
RX
means that the current peak is the RF reception burst (Rx burst), in GSM mode only (worst case).
4.
Refer to section 1
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Consumption Measurement Procedure for more information regarding consumption measurement
procedures.
Consumption Waveform Samples
The consumption waveforms presented below have a typical VBATT voltage of 3.6V and are for an
EGSM900 network configuration.
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:
The following diagrams only show the waveform of the current, and not the exact values.
Connected Mode Current Waveform
TX PEAK
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Transfer Mode Class 10 Current Waveform
TX PEAK
Idle Mode Page 2 Current Waveform
RX PEAK
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Idle Mode Page 9 Current Waveform
RX PEAK
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 8.
Pin #
Signal
I/O
Consumption/Software Driver Recommendations
I/O Type
Reset State
16
GPIO3
I/O
2V8
Pull up
19
GPIO5
I/O
2V8
Z**
24
GPIO1
I/O
2V8
Pull up
Recommended SW Driver (Logic
Level Output State)
Input: 0
Output: 1
**
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. The resistance value depends on the current drain required by the application side.
Note:
GPIO2 is dedicated for WISMO_READY and is not open as a GPIO for customer use.
GPIO4 is dedicated for TX burst indication and is not open as GPIO for customer use.
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Electrical Information for Digital I/O
The following table describes the electrical characteristics of the digital I/Os (interfaces such as
GPIO, SPI, etc.) available on the WISMO228.
Table 9.
Electrical Characteristics of Digital I/Os
2.8Volt Type (2V8)
Parameter
Conditions
Internal 2.8V power supply
Input/Output
Pin
I/O Type
Minimum
Typical
Maximum
VCC_2V8
2.7V
2.8V
2.95V
VIL
CMOS
-0.4V*
0.4V
VIH
CMOS
2.4V
VCC_2V8 +
0.4V
VOL
CMOS
0.1V
CMOS
2.7V
CMOS
2.4V
VOH
IOH = 4mA
Absolute maximum ratings
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SPI Bus for Debug Trace ONLY
The WISMO228 provides one SPI bus through the castellation pin.
Caution: This interface is only used for monitoring trace for debug purposes.
Pin Description
The following table provides the pin description of the SPI bus.
Table 10. SPI Bus Pin Description
Pin #
Signal
I/O
I/O Type
Reset State
Description
13
SPI-IO
I/O
2V8
Pull down
SPI Serial input/output
14
SPI-O
2V8
Pull down
SPI Serial input
15
SPI-CLK
2V8
Pull down
SPI Serial Clock
17
~SPI-CS
2V8
Pull up
SPI Enable
25
SPI-IRQ
2V8
Pull down
SPI Interrupt
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 WISMO228 is not
open for application use other than debug trace.
SPI Waveforms
Figure 7. SPI Timing Diagram
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Figure 8. 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.
Component
Description/Details
Manufacturer
U103
SC16IS750IPW
NXP Semiconductors
X101
3, 6864MHz 86SMX surface mount crystal (9713131)
Farnell
R104, R105
10KΩ
R106
1KΩ
C105
22pF
C106
33pF
C107
100nF
After converting the SPI signal to a UART signal, a UART transceiver circuitry is needed to
communicate this UART signal to the DTE.
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Figure 9. Example of an RS-232 Level Shifter Implementation for UART2
The following table lists the recommended components to use in implementing a UART transceiver
circuitry.
Component
Description/Details
Manufacturer
U200
LTC2804IGN-1
LINEAR TECHNOLOGY
L200
LQH2M CN100K02L
MURATA
J200
096615276119 SUBD9F
HARTING
R202
NC
R204
100KΩ
C200
1µF
C201
220nF
C207
1µF
C208
1µF
Note:
It is recommended to make SPI signals accessible for diagnostics by reserving some test points, for
example.
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Main Serial Link (UART)
A flexible 8‐wire serial interface is available on the WISMO228 that complies with the V24 protocol
signaling, but not with the V28 (electrical interface) protocol, due to its 2.8V interface.
The supported baud rates of the UART are 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200
Kbits, with autobauding; and the signals used by the UART are:
•
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).
Pin Description
The following table provides the pin descriptions of the UART interface.
Table 11. Main Serial Link Pin Description
Pin #
Signal*
I/O
I/O Type
Reset State
Description
38
CT103/TXD
2V8
Transmit serial data
39
~CT105/RTS
2V8
Request To Send
40
CT104/RXD
2V8
Receive serial data
41
~CT106/CTS
2V8
Clear To Send
42
~CT107/DSR
2V8
Data Set Ready
43
~CT109/DCD
2V8
Data Carrier Detect
44
~CT108/DTR
2V8
Data Terminal Ready
45
~CT125/RI
2V8
Ring Indicator
GND
Note:
GND
Ground
According to PC (DTE) view
The rising time and falling time of the reception signals (mainly CT103/TXD) have to be less than
300ns.
The WISMO228 is designed to operate using all the serial interface signals and it is recommended to
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use ~CT105/RTS and ~CT106/CTS for hardware flow control in order to avoid data corruption during
transmissions.
5-wire Serial Interface Hardware Design
The signals used in this interface hardware design are as follows:
•
CT103/TXD
•
CT104/RXD
•
~CT105/RTS
•
~CT106/CTS
•
‐CT108/DTR
The signal ~CT108/DTR must be managed following the V24 protocol signaling if idle mode is to be
used.
For a detailed configuration, refer to Figure 13 Example of V24/CMOS Serial Link Implementation
for a 5‐wire UART.
Note:
All signals are specified according to PC (DTE) view.
4-wire Serial Interface Hardware Design
The signals used in this interface hardware design are as follows:
•
CT103/TXD
•
CT104/RXD
•
~CT105/RTS
•
~CT106/CTS
The signal ~CT108/DTR can be looped back to ~CT107/DSR from both the WISMO228 side and from
the DTE side.
For a detailed configuration, refer to Figure 12 Example of V24/CMOS Serial Link Implementation
for a 4‐wire UART.
Note:
All signals are specified according to PC (DTE) view.
2-wire Serial Interface Hardware Design
Note:
Although this case is possible for a connected external chip, it is not recommended.
All signals are specified according to PC (DTE) view.
The signals used in this interface hardware design are as follows:
•
CT103/TXD
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•
CT104/RXD
Signals ~CT105/RTS and ~CT106/CTS are not used in this configuration. Configure the AT command
AT+IFC=0,0 to disable the flow control function on the WISMO228. Refer to the WISMO218 AT
Commands Manual for more information about configuring AT commands.
Also,
•
The signal ~CT108/DTR can be looped back to ~CT107/DSR from both the WISMO228 side
and from the DTE side.
•
The signal ~CT105/RTS can be looped back to ~CT106/CTS from both the WISMO228 side
and from the DTE side.
•
The flow control mechanism has to be managed from the customer side.
For a detailed configuration, refer to Figure 11 Example of V24/CMOS Serial Link Implementation
for a 2‐wire UART.
The loop back connection of ~CT108/DTR to
~CT107/DSR is not allowed when
AT+PSSLEEP=0 is used, for which sleep mode
entry is ~CT108/DTR level dependent. For more
details, refer to the discussion about AT + PSSLEEP
= 0 in section 0
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Power Consumption.
In order to go to sleep mode properly under this
instead. For more details, refer to the discussion
about AT + PSSLEEP = 1 in section 0
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Note:
Power Consumption.
Application
The level shifter must be a V28 electrical signal compliant with 2.8V.
Figure 10. Example of RS-232 Level Shifter Implementation for UART
Note:
The U1 chip also protects the WISMO228 against ESD (air discharge) at 15KV.
The following table lists the recommended components to use in implementing a level shifter
UART.
Component
Description/Details
Manufacturer
R1, R2
15KΩ
C1, C2, C3, C4, C5
1µF
C6
100nF
C7
6.8uF TANTAL 10V CP32136
AVX
U1
ADM3307EACP
ANALOG DEVICES
J1
SUB-D9 female
R1 and R2 are necessary only during the 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 WISMO228 or by an external
regulator at 2.8V.
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It is not necessary to use level shifters when the UART interface is directly connected to a host
processor. Refer to the following sections for steps on how to connect the interface using other
design implementations.
V24/CMOS Possible Design
Figure 11. Example of V24/CMOS Serial Link Implementation for a 2-wire UART
Figure 12. Example of V24/CMOS Serial Link Implementation for a 4-wire UART
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Figure 13. Example of V24/CMOS Serial Link Implementation for a 5-wire UART
The designs shown in Figure 11, Figure 12 and Figure 13 are basic designs. Both the DCD and the 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 14. Example of a Full Modem V24/CMOS Serial Link Implementation for a full UART
An internal 10KΩ pull‐up resistor is connected on both RI and DCD to set the signals to HIGH level
during the Reset state.
The UART interface is a 2.8V type, but it is 3V tolerant.
Note:
The WISMO228 UART 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 transmission.
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SIM Interface
The Subscriber Identification Module can be directly connected to the WISMO228 through this
dedicated interface.
This interface controls both 1.8V and 3V SIM cards and is fully compliant with GSM 11.11
recommendations concerning SIM functions.
The SIM uses four signals, namely:
•
SIM‐VCC: SIM power supply
•
~SIM‐RST: reset
•
SIM‐CLK: clock
•
SIM‐IO: I/O port
It is recommended to add Transient Voltage Suppressor (TVS) diodes on the signals 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 the SIM‐CLK and SIM‐IO signals to avoid any disturbance
from the rising and falling edge of the signals. TVS diodes are mandatory for the Full Type
Approval and they must be placed as close to the SIM socket as possible.
The recommended low capacitance diode array to use is the DALC208SC6 from ST Microelectronics.
Electrical Characteristics
The following table describes the electrical characteristics of the SIM interface.
Table 12. Electrical Characteristics of the SIM Interface
Parameters
Conditions
Minimum
Typical
Maximum
Unit
SIM-IO VIH
IIH = ± 20µA
0.7xVSIM
SIM-IO VIL
IIL = 1mA
0.4
Source current = 20µA
0.9xVSIM
SIM-IO VOH
Source current = 20µA
0.8xVSIM
~SIM-RST, SIM-IO, SIMCLK
Sink current =
0.4
2.75
2.9
3.0
~SIM-RST, SIM-CLK
VOH
VOL
SIM-VCC Output Voltage
WA_DEV_W228_PTS_002
-200µA
SIM-VCC = 2.9V
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Product Technical Specification &
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Parameters
Conditions
Minimum
Typical
Maximum
Unit
SIM-VCC = 1.8V
1.65
1.8
1.95
full-power mode
20
mA
Sleep mode with 32kHz
system clock enabled.
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
µs
SIM-CLK Frequency
Loaded with 30pF
3.25
MHz
SIM-VCC current
Pin Description
The following table provides the pin description of the SIM interface.
Table 13. SIM Interface Pin Description
Pin #
Signal
I/O
I/O Type
SIM-VCC
2V9 / 1V8
SIM-CLK
2V9 / 1V8
10
SIM-IO
I/O
11
~SIM-RST
WA_DEV_W228_PTS_002
Reset State
Description
Multiplexed
SIM Power Supply
No
SIM Clock
No
2V9 / 1V8
Pull up
SIM Data
No
2V9 / 1V8
SIM Reset
No
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Product Technical Specification &
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Application
Figure 15. Example of a SIM Socket Implementation
The following table lists the recommended components to use in implementing the SIM socket.
Component
Description/Details
Manufacturer
C400
100nF
D400
ESDA6V1SC6
ST
D401
DALC208SC6
SGS-THOMSON
ITT CANNON CCM03 series
(Refer to the SIM Card Reader sub-section of
section 1 Error! Not a valid result for table. for
more information)
J400
CANNON
SIM Socket Connection
The following table provides the pin description of the SIM socket.
Table 14. SIM Socket Pin Description
Pin #
Signal
Description
VCC
SIM-VCC
RST
~SIM-RST
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Product Technical Specification &
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Pin #
Signal
Description
CLK
SIM-CLK
CC4
Not connected
GND
GROUND
VPP
Not connected
I/O
SIM-IO
CC8
Not connected
Note:
CC4 and CC8 are not connected as the WISMO228 does not support the SIM detect feature.
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Product Technical Specification &
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General Purpose Input/Output
The WISMO228 provides up to three 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.
Pin Description
The following table provides the pin description of the GPIOs.
Table 15. GPIO Pin Descriptions
Pin #
Signal
I/O
I/O Type
Reset State
16
GPIO3
I/O
2V8
Pull up
19
GPIO5
I/O
2V8
Pull down
24
GPIO1
I/O
2V8
Pull up
When GPIO5 is used as a general purpose output, it is necessary to have an external pull up resistor
connected to a 2.8V source. The resistance value will depend on the current drain required by the
application.
Note:
GPIO2 is dedicated for WISMO_READY and is not open as GPIO for customer use.
GPIO4 is dedicated for TX burst indication and is not open as GPIO for customer use.
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Product Technical Specification &
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Analog to Digital Converter
One Analog to Digital Converter input, AUX‐ADC0, is provided by the WISMO228 for customer
applications. It is a 10‐bit resolution converter, ranging from either 0 to 1V or 0 to 3V, depending on
the general purpose input mode.
Electrical Characteristics
The following table describes the electrical characteristics of the ADC interface.
Table 16. Electrical Characteristics of the ADC Interface
Parameters
Minimum
Typical
Maximum
Unit
Resolution
10
bits
Sampling frequency
200
kHz
1 general purpose input
1 general purpose input in div-by-3
mode
Integral non-linearity (INL)
-2.5
+2.5
bit
Differential non-linearity (DNL)
-1
+3
bit
input resistance
120
KΩ
input capacitance
10
pF
Input signal range
Input impedance
Pin Description
The following table provides the pin description of the Analog to Digital Converter interface.
Table 17. Analog to Digital Converter Pin Description
Pin #
Signal
AUX-ADC0
I/O
I/O Type
Analog
Description
A/D converter
Caution: The AUX-ADC0 pin is ESD sensitive and it is a must to add ESD protection to this pin once it is
externally accessible. The recommended ESD protection to use is the AVL5M02200 from Amotech.
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Analog Audio Interface
The WISMO228 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.
Microphone Features
The microphone, MIC, can have either a single‐ended or a differential connection. However, it is
strongly recommended to use a differential connection instead of a single‐ended 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 interface already includes suitable biasing for an electret microphone. The electret
microphone can be connected directly on the inputs for easy connection.
AC coupling is also already embedded in the WISMO228.
Figure 16. DC Equivalent Circuit of MIC
Figure 17. AC Equivalent Circuit of MIC
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Electrical Characteristics
The following table describes the electrical characteristics of the audio interface, MIC.
Table 18. Electrical Characteristics of MIC
Parameters
Typical
Maximum
Unit
MICP
2.4
MICN without 2.2KΩ to GND
2.4
MICN with 2.2KΩ to GND
1.2
Internal biasing
DC Characteristics
Minimum
Output current
R2
mA
2.2
KΩ
Z2 MICP (MICN=Open)
2.2
Z2 MICN (MICP=Open)
Z2 MICP (MICN=GND)
2.2
AC Characteristics
200 Hz 50dB
•
Frequency response is compatible with 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
GSM850/EGSM900 frequency signals
•
CM2=15pF (0402 package) for the TDMA noise coming from the demodulation of the
DCS1800/PCS1900 frequency signals
The capacitors have to be soldered in parallel to the microphone as shown in the figure below.
CM
Figure 25. Capacitor Soldered in Parallel to the Microphone
Recommended Speaker Characteristics
•
Type of speakers: Electro‐magnetic /10mW
•
Impedance: 8Ω for hands‐free
•
Impedance: 32Ω for heads kit
•
Sensitivity: 110dB SPL min
•
Receiver frequency response is compatible with GSM specifications.
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 GSM850, EGSM900,
DCS1800 and PCS1900 signals, where a burst is produced every 4.615ms; and the frequency of the
TDMA signal is equal to 216.7Hz plus harmonics.
TDMA noise can be suppressed by filtering the RF signal using the appropriate decoupling
components.
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The types of filtering components are:
•
RF decoupling inductors
•
RF decoupling capacitors
A good “Chip S‐Parameter” simulator is available from Murata. Refer to
http://www.murata.com/products/design_support/mcsil/index.html for more details.
Using different Murata components, it can be seen that different packages (with different values and
ratings) can have different coupling effects. Refer to the following table for examples using different
Murata components.
Package
Filtered band
0402
GSM900
GSM850/900
DCS/PCS
Value
100nH
56pF
15pF
Types
Inductor
Capacitor
Capacitor
Position
Serial
Shunt
Shunt
Manufacturer
Murata
Murata
Murata
Rated
150mA
50V
50V
LQG15HSR10J02 or
LQG15HNR10J02
GRM1555C1H560JZ01
GRM1555C1H150JZ01 or
GRM1555C1H150JB01
Reference
Package
Filtered band
0603
GSM900
GSM850/900
DCS/PCS
Value
100nH
47pF
10pF
Types
Inductor
Capacitor
Capacitor
Position
Serial
Shunt
Shunt
Manufacturer
Murata
Murata
Murata
Rated
300mA
50V
50V
LQG18HNR10J00
GRM1885C1H470JA01 or
GRM1885C1H470JB01
GRM1885C1H150JA01 or
GQM1885C1H150JB01
Reference
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.
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Figure 26. 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.
Differential Audio line is
always in parallel
Figure 27. Differential Audio Connection
For single‐ended connections, the negative pole of the microphone, MICN, should be connected to
GND.
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Figure 28. 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 WISMO228 module ground as close as possible to the castellation GND pin of the
WISMO228.
The same case is applicable to 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. The recommended ESD protection is the ESDA6VIL from ST.
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Pulse-Width Modulators (PWMs)
The WISMO228 contains two Pulse‐Width Modulators (PWMs) that can be used in conjunction with
an external transistor for driving a vibrator, or a backlight LED. 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 29. Relative Timing for the PWM Output
Electrical Characteristics
The following table describes the electrical characteristics of the PWM interface.
Table 22. Electrical Characteristics of the PWM Interface
Parameters
Conditions
Minimum
Typical
Maximum
Unit
High impedance load
2.7
2.85
Load with IoH = 4mA
2.4
VOL
0.1
IPEAK
mA
Frequency
25.6
1083.3
kHz
Duty cycle
0*
100*
VOH
Pin Description
The following table provides the pin description of the Pulse‐Width Modulators.
Table 23. PWM Pin Description
Pin #
35
Signal
PWM1
WA_DEV_W228_PTS_002
I/O
Rev 001
I/O Type
2V8
Description
PWM output
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Product Technical Specification &
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Pin #
36
Signal
PWM0
I/O
I/O Type
2V8
Description
PWM output
Application
Both the PWM0 and PWM1 signals can be used in conjunction with an external transistor for driving
a vibrator, or a backlight LED.
Figure 30. Example of an LED Driven by the PWM0 or PWM1 Output
The value of R607can 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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BUZZER Output
The BUZZER signal 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.
It 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 muted.
Figure 31. BUZZER Output
Electrical Characteristics
The following table describes the electrical characteristics of the BUZZER signal.
Table 24. Electrical Characteristics of the BUZZER Signal
Parameters
Conditions
Minimum
Typical
Maximum
Unit
High impedance load
2.7
2.85
Load with IoH = 4mA
2.4
IPEAK
mA
VOL
0.1
Frequency
200
2500
Hz
Duty cycle
0*
100*
Tone level
4 dB step
-24
dB
VOH
Be mindful of the maximum frequency and the minimum/maximum duty cycle. There is a limitation to these
parameters due to the RC environment. The amplitude modulation becomes less fine when the set limits are
reached.
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Pin Description
The following table provides the pin description of the BUZZER signal.
Table 25. BUZZER Pin Description
Pin #
34
Signal
BUZZER
I/O
I/O Type
2.8V
Description
Buzzer output
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 transient voltage
suppressor diode must be added as shown below.
Figure 32. Example of a BUZZER Implementation
Where:
•
R1 must be chosen in order to limit the current at IPEAK max to 100mA and must be adjusted
in relation to the frequency and the duty cycle used.
•
D1 = BAV70T‐7 or BAS16 (for example)
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Product Technical Specification &
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•
T1 = FDN335N (for example)
•
R2 = 0Ω
•
R3 = 1MΩ
Note:
A low filter is recommended at low frequencies.
Low Filter Calculations
To compute for the cut‐off frequency, use the formula Fc = 1/(2*Π*Req*C1) where:
•
Fc = cut‐off frequency
•
Req = the total resistors in line
•
C1 = the capacitive charge on T1 and the ground
Bear in mind that:
•
Fc must be higher than FBUZZ‐OUT
•
Fc must be at least 64 * FBUZZ‐OUT
Note:
The frequency modulation of the BUZZER signal is 64*FBUZZ-OUT.
Recommended Characteristics
•
Electro‐magnetic type
•
Impedance: 7 to 30Ω
•
Sensitivity: 90 dB SPL min @ 10 cm
•
Current: 60 to 90mA
The BUZZER output can also be used to drive an LED as shown in the figure below.
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Figure 33. Example of an 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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Product Technical Specification &
Customer Design Guidelines
ON/~OFF Signal
The ON/~OFF pin is used to switch ON or switch OFF the WISMO228. It is internally connected to
the permanent 3.0V supply regulator inside the WISMO228 via a pull‐up resistor. Once there is
VBATT supply to the WISMO228, 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 the WISMO228 ON.
Caution: All external signals must be inactive when the WISMO228 is OFF to avoid any damage when starting
and to allow the WISMO228 to start and stop correctly.
Electrical Characteristics
The following table describes the electrical characteristics of the ON/~OFF signal.
Table 26. Electrical Characteristics of the ON/~OFF Signal
Parameter
I/O Type
Minimum
Typical
Maximum
Unit
VIH
2V8
2.4
3.0
VIL
2V8
0.4
Pin Description
The following table provides the pin description of the ON/~OFF signal.
Table 27. ON/~OFF Signal Pin Description
Pin #
37
Signal
ON/~OFF
WA_DEV_W228_PTS_002
I/O
Rev 001
I/O Type
2V8
Description
WISMO228 Power ON/OFF
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Product Technical Specification &
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Application
Figure 34. Example of the ON/~OFF Pin Connection
Power ON
Figure 35. Power-ON Sequence
Table 28. Power-ON Sequence
Minimum (s)
Tready
Typical (s)
Maximum (s)
The ON/~OFF signal level is detected about 250ms after VBATT is available.
Note:
This timing might be temperature dependant.
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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 set 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 WISMO228 is properly powered ON, the WISMO_READY pin will set to HIGH level to
acknowledge the successful powering ON of the WISMO228 before it is ready to operate. The
ON/~OFF signal can be left at LOW level until power off.
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.
Power OFF
The WISMO228 can be powered off by either software or hardware. Refer to the following diagram
for the power OFF sequence.
Figure 36. Power-OFF Sequence
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Software Power OFF
The AT command AT+CPOF is used to power OFF the WISMO228.
Note:
If the ON/~OFF pin is maintained at LOW level when AT+CPOF is used, the module cannot be
switched OFF.
Hardware Power OFF
A LOW level pulse is applied on the ON/~OFF pin for TBC seconds. AT+CPOF will then be
automatically sent to the WISMO228.
Once the WISMO228 receives the AT+CPOF command, the WISMO228 will be unregistered from
the network. The WISMO_READY pin will become LOW to indicate that AT commands are no
longer available for the WISMO228. If the ON/~OFF signal is HIGH, then the WISMO228 will also
be switched OFF.
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WISMO_READY Indication
This signal indicates the status of the WISMO228 after being powered ON. Note that there is an
initial positive pulse of less than 200ms during power ON. Refer to Figure 35: Power‐ON Sequence
for more information regarding the power ON sequence. Once the WISMO228 is properly powered
ON, the WISMO_READY signal will set to HIGH to acknowledge the successful powering ON of
the WISMO228 before it is ready to operate. Likewise, the pin will set to LOW before powering OFF.
Electrical Characteristics
The following table describes the electrical characteristics of the WISMO_READY signal.
Table 29. Electrical Characteristics of the WISMO_READY Indication
Parameters
I/O Type
Minimum
Typical
Maximum
Unit
VOH
2V8
2.7
2.8
2.95
VOL
2V8
0.4
Pin Description
The following table provides the pin description of the WISMO_READY signal.
Table 30. WISMO_READY Indication Pin Description
Pin #
Signal
WISMO_READY
WA_DEV_W228_PTS_002
I/O
Rev 001
I/O Type
2V8
Description
WISMO228 ready indication
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Product Technical Specification &
Customer Design Guidelines
VCC_2V8 Output
The VCC_2V8 output voltage supply is available when the WISMO228 is switched ON and can only
be used for pull‐up resistor(s) and as a reference supply.
Electrical Characteristics
The following table describes the electrical characteristics of the VCC_2V8 signal.
Table 31. Electrical Characteristics of the VCC_2V8 Signal
Parameters
Minimum
Output voltage
VCC_2V8
Typical
Maximum
Unit
2.70
2.80
2.95
Full-power mode
50
mA
Sleep mode
mA
Output Current
Pin Description
The following table provides the pin description of the VCC_2V8 voltage supply.
Table 32. VCC_2V8 Pin Description
Pin #
46
Signal
VCC_2V8
I/O
I/O Type
Supply
Description
Digital supply
Application
This digital power supply is mainly used to:
•
Pull‐up signals such as I/Os
•
Supply the digital transistors driving LEDs
•
Act as a voltage reference for the ADC interface AUX‐ADC0
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BAT-RTC (Backup Battery)
The BAT‐RTC (backup battery) pin is used as a back‐up power supply for the internal Real Time
Clock (RTC). VBATT provides the power supply to the RTC when VBATT is switched on but a
back‐up power supply is needed to save the date and hour when it is switched off.
If VBATT is available, the back‐up battery can be charged by the internal 3.0V power supply
regulator via a 2KΩ resistor implemented inside the WISMO228.
If the RTC is not used, this pin can be left open.
Electrical Characteristics
The following table describes the electrical characteristics of the BAT‐RTC signal.
Table 33. Electrical Characteristics of the BAT-RTC Signal
Parameters
Minimum
Typical
Maximum
Unit
Input voltage
3.0
Input current consumption*
2.5
µA
Output voltage
2.82
3.0
3.18
Max charging current (@VBATT=3.6V)
0.6
mA
Provided by an RTC back-up battery when the WISMO228 is off and VBATT = 0V.
Pin Description
The following table provides the pin description of the BAT‐RTC voltage supply.
Table 34. BAT-RTC Pin Description
Pin #
Signal
BAT-RTC
I/O
I/O
I/O Type
Supply
Description
RTC Back-up supply
Application
The backup power supply can be any of the following:
•
A super capacitor
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•
A non rechargeable battery
•
A rechargeable battery cell
Super Capacitor
Figure 37. RTC Supplied by a Gold Capacitor
Estimated supply time with a 0.47F gold capacitor: 25 minutes (minimum).
Note:
The maximum voltage of the gold capacitor is 3.9V.
Non-Rechargeable Battery
Figure 38. RTC Supplied by a Non Rechargeable Battery
The diode, D1, is mandatory to prevent the non rechargeable battery from being damaged.
Estimated supply time with an 85 mAh battery: 800 hours (minimum).
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Rechargeable Battery Cell
Figure 39. RTC Supplied by a Rechargeable Battery Cell
Estimated supply time with a fully charged 3.4mAh rechargeable battery: 7 days (minimum).
Caution: Before battery cell assembly, ensure that the cell voltage is lower than 3.0V to avoid damaging the
WISMO228.
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TX_CTRL Signal for TX Burst Indication
The TX_CTRL signal is a 2.8V indication signal for TX Burst with a 100KΩ pull‐up resistor
implemented inside the WISMO228 module.
Table 35. TX_CTRL Status
WISMO228 State
TX_CTRL Status
During TX burst
Low
No TX
High
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.
Figure 40. TX_CTRL State During TX Burst
Electrical Characteristics
The following table describes the electrical characteristics of the TX_CTRL signal.
Table 36. Electrical Characteristics of the TX_CTRL Signal
Parameters
Conditions
Minimum
Typical
Maximum
Unit
VOH
2.6
2.95
VOL
0.4
18
µs
Tadvance
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Parameters
Conditions
Minimum
@1A
Tdelay
Typical
Maximum
Unit
27
µs
11
µs
Pin Description
The following table provides the pin description of the TX_CTRL signal.
Table 37. TX_CTRL Signal Pin Description
Pin #
18
Signal
TX_CTRL
I/O
I/O Type
Reset State
2V8
Description
TX Burst indication
Application
The TX burst indication signal, TX_CTRL, can be used to drive an LED through a transistor. It can
be a good visual indicator for any TX activities.
Figure 41. Example of a TX Status Implementation
The value of R607 can be harmonized depending on the LED (D1) characteristics.
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Reset
The ~RESET pin is a hardware reset and should only be used for emergency resets. It has a 100KΩ
internal pull up resistor to VCC_2V8.
To activate the «emergency» reset sequence, the ~RESET signal has to be set to LOW level manually.
This can be done by using a push button, for example.
Figure 42. Reset Timing
Electrical Characteristics
The following table describes the electrical characteristics of the ~RESET signal.
Table 38. Electrical Characteristics of the Reset Signal
Parameters
Minimum
Typical
Maximum
Unit
Ω
Input Impedance ( R )*
100K
Input Impedance (C)
10nF
Cancellation time (Ta) at power up only
38
ms
VH**
1.57
VIL
1.2
VIH
1.96
2.8
--
Internal pull up resistance
**
VH : Hysterisis Voltage
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Pin Description
The following table provides the pin description of the RESET signal.
Table 39. Reset Pin Description
Pin #
12
Signal
I/O
100K
Pull-up
~RESET
I/O Type
2V8
Description
WISMO228 Reset
Application
If the «emergency» reset is used, it has to be driven by either a push button or an open
collector/drain transistor as shown in the figures below.
Push button
~RESET
GND
Figure 43. Example of ~RESET Pin Connection with a Push Button Configuration
~RESET
Reset
command
T1
Rohm DTC144EE
GND
Figure 44. Example of ~RESET Pin Connection with a Transistor Configuration
An open collector or open drain transistor can also be used to drive the ~RESET pin (due to the
internal pull‐up resistor embedded into the WISMO228). If an open collector is chosen, the
recommended digital transistor to use for T1 is the DTC144EE from ROHM.
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Table 40. Reset Commands
Reset Command
~RESET
Operating Mode
Reset activated
Reset inactive
Note:
It is recommended to add a varistor (such as the AVL5M02200 from AMOTECH) on the ~RESET pin
in order to enhance ESD immunity.
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RF Interface
The RF interface allows the transmission of radio frequency (RF) signals from the WISMO228 to an
external antenna. This interface has a nominal impedance of 50Ω and a DC resistance of 0Ω.
RF Connection
The RF input/output of the WISMO228 is through one of the castellation pins (Pin 21, ANT), with
grounded castellation pins at both sides. This castellation pin must be connected to a 50Ω RF line in
order to protect the antenna line from the noise coming from baseband signals.
50Ω RF line
Castellation pin
for ANT
Figure 45. Example of a 50Ω RF Line
The 50Ω RF line is surrounded by two ground planes in order to protect the antenna line from
noise. The length of the line shouldn’t be too long (no more than a few centimeters) because of RF
insertion loss. The width of the line must be calculated in order to ensure a 50Ω characteristic
impedance.
For this same reason, the embedded RF 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 50Ω RF line can be connected to an RF connector or to 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 WISMO228 is ESD protected for both ±4KV contact and ±8KV air discharge.
Note:
The correct antenna cable and connector should be chosen in order to minimize loss in the frequency
bands used for GSM800, EGSM900, DCS1800 and PCS1900.
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0.5dB can be considered as the maximum value for loss between the WISMO228 and an external
connector.
RF Performances
RF performances are compliant with ETSI recommendation GSM 05.05. Listed below are the main
parameters for both the Receiver and the Transmitter.
The main parameters for the Receiver are:
•
GSM850/EGSM900 Reference Sensitivity = ‐108 dBm (typ.)
•
DCS1800/PCS1900 Reference Sensitivity = ‐108 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
Antenna Specifications
The optimum operating frequency depends on the application. A dual‐band or a quad‐band antenna
will work in the following frequency bands and should have the following characteristics.
Table 41. Antenna Specifications
WISMO228
Characteristic
GSM 850
E-GSM 900
DCS 1800
PCS 1900
TX Frequency
824 to 849 MHz
880 to 915 MHz
1710 to 1785 MHz
1850 to 1910 MHz
RX Frequency
869 to 894 MHz
925 to 960 MHz
1805 to 1880 MHz
1930 to 1990 MHz
Impedance
50Ω
Rx max
1.5 :1
Tx max
1.5 :1
VSWR
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Characteristic
Typical radiated gain
WISMO228
0dBi in one direction at least
Caution: Both mechanical and electrical antenna adaptations are key issues in the design of a GSM terminal.
It is strongly recommended to work with an antenna manufacturer to either develop an antenna
adapted to the application or to adapt an existing solution to the application.
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5. Consumption Measurement
Procedure
This chapter describes the consumption measurement procedure used to obtain the WISMO228
consumption specification.
The WISMO228 consumption specification values are measured for all operating modes available on
the product.
Hardware Configuration
Consumption results are highly dependent on the hardware configuration used during
measurement and this section describes the hardware configuration settings that must be used to
obtain optimum consumption measurements.
The following hardware configuration includes both the measurement equipment and the
WISMO228 with its socket‐up board on the WISMO218 development kit.
Equipments
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 WISMO228 and save measurement data
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Figure 46. Typical Hardware Configuration
The communication tester is a CMU200 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
WISMO228. This is done with the objective to separate the WISMO218 Development Kit board
consumption from the WISMO228 consumption – which is measured by the other power supply,
the 66321B current measuring power supply. Both the standalone power supply and the current
measuring power supply are connected to and controlled by the computer (GPIB control, which is
not shown in the figure).
The standalone power supply, AX502 (or VBAT), may be set from 3.2V to 4.8V; while the current
measure power supply, 66321B (or VBATT), may also be set from 3.2V to 4.8 according to the
WISMO228 VBATT specifications.
A SIM must be inserted in the WISMO218 Development Kit during all consumption measurement.
The following table lists the recommended equipments to use for the consumption measurement.
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Table 42. List of Recommended Equipments
Device
Manufacturer
Reference
Notes
Quad Band
Communication Tester
Rhode & Schwartz
CMU 200
Current measuring
power supply
Agilent
66321B
Used for VBATT (supplies the
WISMO228)
Stand alone power
supply
Metrix
AX502
Used for VBAT (supplies the
WISMO218 development kit board)
GSM/DCS/GPRS
WISMO218 Development Kit
The WISMO218 Development Kit is used as a basis for the WISMO228 measurement via an adaptor
board and is used to perform consumption measurement using several settings. Refer to the
WISMO218 Development Kit User Guide and the WISMO218 Hardware Presentation for more
information about these settings.
Note:
The WISMO218 Development Kit can be replaced by WMP100 Development Kit once a suitable
socket-up board is available.
The WISMO218 Development Kit board is powered by the standalone power supply at VBAT; while
the WISMO228 is powered by the current measuring power supply at VBATT. 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).
•
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 WISMO228; 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.
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The goal of the settings listed above is to eliminate all bias current from VBATT and to supply the
entire board (except theWISMO228) using only VBAT.
Socket-Up Board
An adaptor board, the WISMO218 Socket‐Up Board (WM0801706‐020‐20), is used to connect the
WISMO228 to work on the WISMO218 Development Kit.
On this socket‐up board, the soldering points of J203, J204, JP101, JP102, JP103, JP104, JP105, JP106
and JP107 must be opened.
SIM Cards
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 WISMO228’s power supply. Consumption measurement
results may vary depending on the SIM card used.
Software Configuration
This section discusses the software configuration for the equipment(s) used and the WISMO228
settings.
WISMO228 Configuration
The WISMO228 software configuration is simply performed by selecting the operating mode to use
in performing the measurement.
A description of the operating modes and the procedures used to change the operating mode are
given in the appendix of WISMO218 AT Commands Manual.
The available operating modes in the WISMO228 are as follows:
•
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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Equipment Configuration
The communication tester is set according to the WISMO228 operating mode. Paging during idle
modes, TX burst power, RF band and GSM/DCS/GPRS may be selected on the communication
tester.
Refer to the following table for the network analyzer configuration according to operating mode.
Table 43. Operating Mode Information
Operating Mode
Communication Tester Configuration
OFF Mode
N/A
Alarm Mode
N/A
Paging 2 (Rx burst occurrence ~0,5s)
Idle Mode
Paging 9 (Rx burst occurrence ~2s)
PCL5 (TX power 33dBm)
850 MHz
PCL19 (TX power 5dBm)
PCL5 (TX power 33dBm)
900 MHz
PCL19 (TX power 5dBm)
Connected Mode
PCL0 (TX power 30dBm)
1800MHz
PCL15 (TX power 0dBm)
PCL0 (TX power 30dBm)
1900 MHz
PCL15 (TX power 0dBm)
Gam.3 (TX power 33dBm)
850 MHz
Gam.17 (TX power 5dBm)
Gam.3 (TX power 33dBm)
900 MHz
GPRS
Gam.17 (TX power 5dBm)
Transfer Mode class 8
(4Rx/1Tx)
Gam.3 (TX power 30dBm)
1800MHz
Gam.18 (TX power 0dBm)
Gam.3 (TX power 30dBm)
1900 MHz
Gam.18 (TX power 0dBm)
Transfer Mode class 10
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Gam.3 (TX power 33dBm)
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Operating Mode
Communication Tester Configuration
(3Rx/2Tx)
Gam.17 (TX power 5dBm)
Gam.3 (TX power 33dBm)
900 MHz
Gam.17 (TX power 5dBm)
Gam.3 (TX power 30dBm)
1800MHz
Gam.18 (TX power 0dBm)
Gam.3 (TX power 30dBm)
1900 MHz
Gam.18 (TX power 0dBm)
Template
This template may be used for consumption measurement for all modes and configurations
available. Note that three VBATT voltages are used to measure consumption, namely: VBATTmin
(3.2V), VBATTtyp (3.6V) and VBATTmax (4.8V). The minimum/maximum RF transmission power
configurations are also set and measured.
Table 44. WISMO228 Power Consumption
WISMO228 Power Consumption
Operating Mode
Parameters
I MIN
average
I NOM
average
I M AX
I M AX peak Unit
average
VBATT=4.8V VBATT=3.6V VBATT=3.2
Off Mode*
µA
Alarm Mode
µA
Idle Mode
TBD
mA
Paging 9 (Rx burst
occurrence ~2s)
mA
PCL5
(TX
power 33dBm)
mA
PCL19
(TX
power 5dBm)
mA
PCL5
(TX
power 33dBm)
mA
850 MHz
Connected Mode
900 MHz
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PCL19
(TX
power 5dBm)
mA
PCL0
(TX
power 30dBm)
mA
PCL15
(TX
power 0dBm)
mA
PCL0
(TX
power 30dBm)
mA
PCL15
(TX
power 0dBm)
mA
Gam.3
(TX
power 33dBm)
mA
Gam.17
(TX
power 5dBm)
mA
Gam.3
(TX
power 33dBm)
mA
Gam.17
(TX
power 5dBm)
mA
Gam.3
(TX
power 30dBm)
mA
Gam.18
(TX
power 0dBm)
mA
Gam.3
(TX
power 30dBm)
mA
Gam.18
(TX
power 0dBm)
mA
Gam.3
(TX
power 33dBm)
mA
Gam.17
(TX
power 5dBm)
mA
Gam.3
(TX
power 33dBm)
mA
Gam.17
(TX
power 5dBm)
mA
Gam.3
(TX
power 30dBm)
mA
Gam.18
(TX
power 0dBm)
mA
1800 MHz
1900 MHz
850 MHz
900 MHz
Transfer
Mode class
8 (4Rx/1Tx)
1800 MHz
GPRS
1900 MHz
850 MHz
Transfer
Mode class 900 MHz
10 (3Rx/2Tx)
1800 MHz
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Gam.3
(TX
power 30dBm)
mA
Gam.18
(TX
power 0dBm)
mA
1900 MHz
Current consumption in OFF mode is measured with BAT-RTC being left open.
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6.
Technical Specifications
Castellation Pins
Pin Configuration
Figure 47. WISMO228 Pin Configuration
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Pin Description
Table 45. WISMO228 Castellation Pin Description
Pin #
Signal
Description
I/O
Pin #
Signal
Description
I/O
SPKP
Speaker output
positive 32 ohms
Analog
24
GPIO1
2.8V GPIO
I/O
SPKN
Speaker output
negative 32 ohms
Analog
25
SPI-IRQ
2.8V SPI interrupt
request input
MICP
Microphone input
positive
Analog
26
GND
Ground
Ground
MICN
Microphone input
negative
Analog
27
NC
Not connected
AUX_ADC
Analog to digital
converter
28
GND
Ground
Ground
BAT-RTC
Power supply for RTC
backup
29
VBATT
Power supply
WISMO_R
EADY
2.8V WISMO Ready
30
VBATT
Power supply
SIM-VCC
SIM power supply
31
GND
Ground
Ground
SIM-CLK
SIM clock
32
NC
Not connected
10
SIM-IO
SIM data
I/O
33
NC
Not connected
11
~SIM-RST
SIM reset
34
BUZZER
2.8V Buzzer PWM2
12
~RESET
input reset signal
35
PWM1
2.8V DC PWM 1
13
SPI-IO
2.8V SPI data input
I/O
36
PWM0
2.8V DC PWM 0
14
SPI-O
2.8V SPI data output
37
On/~OFF
Power On control
signal
15
SPI-CLK
2.8V SPI clock output
38
CT103/T
XD*
2.8V UART1:
Transmit data
16
GPIO3
2.8V GPIO
I/O
39
~CT105/
RTS*
2.8V UART1:
Request to send
17
~SPI-CS
2.8V SPI chip select
output
40
CT104/R
XD*
2.8V UART1:
Receive data
18
TX_CTRL
2.8V TX Burst
Indicator
41
~CT106/
CTS*
2.8V UART1: Clear
to send
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Pin #
Signal
Description
I/O
Pin #
Signal
Description
I/O
19
GPIO5
2.8V GPIO
I/O
42
~CT107/
DSR
2.8V UART1: Data
set ready
20
GND
Ground
Ground
43
~CT109/
DCD
2.8V UART1: Data
carrier detect
21
ANT
Radio antenna
connection
I/O
44
~CT108/
DTR
2.8V UART1: Data
terminal ready
22
GND
Ground
Ground
45
~CT125/
RI
2.8V UART1: Ring
indicator
23
GND
Ground
Ground
46
VCC_2V
2.8V power supply
from module
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.
Recommended Connection When Not Used
The table below gives the recommended connection for any unused pins.
Table 46. Recommended Connection When Not Used
Pin #
Signal
Recommended
Connection When Not
Used
Pin #
Signal
Recommended
Connection When Not
Used
SPKP
Open
24
GPIO1
Open
SPKN
Open
25
SPI-IRQ
PCB test point
MICP
Open
26
GND
Ground
MICN
Open
27
NC
Not connected
AUX_ADC0
Ground
28
GND
Ground
BAT-RTC
Open
29
VBATT
Power supply
WISMO_READY
Open
30
VBATT
Power supply
SIM-VCC
SIM power supply
31
GND
Ground
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
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Pin #
Signal
Recommended
Connection When Not
Used
Pin #
Signal
Recommended
Connection When Not
Used
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/DTR**
20
GND
Ground
43
~CT109/DCD
Open
21
ANT
Radio antenna connection
44
~CT108/DTR
Connect to ~CT107/DSR**
22
GND
Ground
45
~CT125/RI
Open
23
GND
Ground
46
VCC_2V8
Open
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.
**
Refer to Table 11: Main Serial Link Pin
Description of the section discussing the SPI Bus
for Debug Trace ONLY
The WISMO228 provides one SPI bus through the castellation pin.
Caution: This interface is only used for monitoring trace for debug purposes.
Pin Description
The following table provides the pin description of the SPI bus.
Table 47. SPI Bus Pin Description
Pin #
13
Signal
SPI-IO
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I/O Type
Reset State
2V8
Pull down
Description
SPI Serial input/output
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Pin #
Signal
I/O
I/O Type
Reset State
Description
14
SPI-O
2V8
Pull down
SPI Serial input
15
SPI-CLK
2V8
Pull down
SPI Serial Clock
17
~SPI-CS
2V8
Pull up
SPI Enable
25
SPI-IRQ
2V8
Pull down
SPI Interrupt
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 WISMO228 is not
open for application use other than debug trace.
SPI Waveforms
Figure 48. SPI Timing Diagram
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Figure 49. 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.
Component
Description/Details
Manufacturer
U103
SC16IS750IPW
NXP Semiconductors
X101
3, 6864MHz 86SMX surface mount crystal (9713131)
Farnell
R104, R105
10KΩ
R106
1KΩ
C105
22pF
C106
33pF
C107
100nF
After converting the SPI signal to a UART signal, a UART transceiver circuitry is needed to
communicate this UART signal to the DTE.
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Figure 50. Example of an RS-232 Level Shifter Implementation for UART2
The following table lists the recommended components to use in implementing a UART transceiver
circuitry.
Component
Description/Details
Manufacturer
U200
LTC2804IGN-1
LINEAR TECHNOLOGY
L200
LQH2M CN100K02L
MURATA
J200
096615276119 SUBD9F
HARTING
R202
NC
R204
100KΩ
C200
1µF
C201
220nF
C207
1µF
C208
1µF
Note:
It is recommended to make SPI signals accessible for diagnostics by reserving some test points, for
example.
Main Serial Link (UART) for more information regarding the connection between DSR and DTR.
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PCB Specifications for the Application Board
In order to save costs for simple applications, a cheap PCB structure can be used for the application
board of the WISMO228. A 4‐layer through‐hole type PCB structure can be used.
Figure 51. PCB Structure Example for the Application Board
Note:
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, care must be taken during PCB layout for these
sensitive signals by avoiding coupling to noisy baseband through adjacent layers.
Environmental Specifications
The WISMO228 is compliant with the following operating classes. The table below lists the ideal
temperature range of the environment.
Table 48. Operating Class Temperature Range
Conditions
Temperature Range
Operating / Class A
-20 °C to +55°C
Operating / Class B
-40 °C to +85°C
Storage
-40 °C to +85°C
Function Status Classification
Class A
The WISMO228 remains fully functional, meeting GSM performance criteria in accordance with
ETSI requirements, across the specified temperature range.
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Class B
The WISMO228 remains fully functional across the specified temperature range. Some GSM
parameters may occasionally deviate from the ETSI specified requirements and this deviation does
not affect the ability of the WISMO228 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
WISMO228 are listed in the table below.
Table 49. Environmental Classes
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Mechanical Specifications
Physical Characteristics
The WISMO228 has a nearly‐complete self‐contained shield.
•
Overall dimensions: 25.0 x 25.0 x 2.8 mm (excluding label thickness)
•
Weight: 3.64g
Recommended PCB Landing Pattern
Refer to the Customer Process Guideline for WISMO Series document.
WISMO228 Dimensions

Figure 52. WISMO228 Dimensions
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7. Recommended Peripheral
Devices
General Purpose Connector
The general purpose connector is a 46‐pin castellation connector with a 1.5mm pitch.
SIM Card Reader
Listed below are the recommended SIM Card Readers to use with the WISMO228.
•
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 )
Microphone
Microphones can be obtained from the following recommended suppliers:
•
HOSIDEN
•
PANASONIC
•
PEIKER
Speaker
Speakers can be obtained from the following recommended suppliers:
•
SANYO
•
HOSIDEN
•
PRIMO
•
PHILIPS
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Antenna Cable
Listed below are the recommended antenna cables to mount on the WISMO228.
•
RG178
•
RG316
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/ )
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8.
Noises and Design
EMC Recommendations
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.
Power Supply
The power supply is one of the key issues in the design of a GSM terminal and careful attention
should be paid to the following:
•
Quality of the power supply: low ripple, PFM or PSM systems should be avoided (using a
PWM converter is preferred).
•
The capacity to deliver high current peaks in a short time (pulsed radio emission).
A weak power supply design could affect the following items specifically:
•
EMC performances
•
The emissions spectrum
•
Phase error and frequency error
Overvoltage
The WISMO228 does not include any protection against overvoltage.
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9.
Appendix
Standards and Recommendations
GSM ETSI, 3GPP, and GCF recommendations for Phase II
Specification Reference
3GPP TS 45.005 v5.5.0 (2002-08)
Release 5
GSM 02.07 V8.0.0 (1999-07)
Title
Technical Specification Group GSM/EDGE. Radio Access Network;
Radio transmission and reception
Digital cellular telecommunications system (Phase 2+);
Mobile Stations (MS) features (GSM 02.07 version 8.0.0 Release 1999)
Digital cellular telecommunications system (Phase 2+);
GSM 02.60 V8.1.0 (1999-07)
General Packet Radio Service (GPRS); Service description, Stage 1
(GSM 02.60 version 8.1.0 Release 1999)
Technical Specification Group Services and System Aspects;
GSM 03.60 V7.9.0 (2002-09)
Digital cellular telecommunications system (Phase 2+); General Packet
Radio Service (GPRS); Service description; Stage 2 (Release 1998)
3GPP TS 43.064 V5.0.0 (2002-04)
Technical Specification Group GERAN; Digital cellular
telecommunications system (Phase 2+); General Packet Radio Service
(GPRS); Overall description of the GPRS radio interface; Stage 2
(Release 5)
3GPP TS 03.22 V8.7.0 (2002-08)
Technical Specification Group GSM/EDGE. Radio Access Network;
Functions related to Mobile Station (MS) in idle mode and group receive
mode; (Release 1999)
3GPP TS 03.40 V7.5.0 (2001-12)
Technical Specification Group Terminals;
Technical realization of the Short Message Service (SMS)
(Release 1998)
3GPP TS 03.41 V7.4.0 (2000-09)
Technical Specification Group Terminals; Technical realization of Cell
Broadcast Service (CBS) (Release 1998)
Digital cellular telecommunications system (Phase 2+);
ETSI EN 300 903 V8.1.1 (2000-11)
Transmission planning aspects of the speech service in the GSM
Public Land Mobile Network (PLMN) system (GSM 03.50 version 8.1.1
Release 1999)
3GPP TS 04.06 V8.2.1 (2002-05)
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Technical Specification Group GSM/EDGE Radio Access Network;
Mobile Station - Base Station System (MS - BSS) interface; Data Link
(DL) layer specification (Release 1999)
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Specification Reference
Title
Technical Specification Group Core Network;
3GPP TS 04.08 V7.18.0 (2002-09)
Digital cellular telecommunications system (Phase 2+);
Mobile radio interface layer 3 specification (Release 1998)
3GPP TS 04.10 V7.1.0 (2001-12)
Technical Specification Group Core Networks;
Mobile radio interface layer 3 Supplementary services specification;
General aspects (Release 1998)
3GPP TS 04.11 V7.1.0 (2000-09)
Technical Specification Group Core Network; Digital cellular
telecommunications system (Phase 2+); Point-to-Point (PP) Short
Message Service (SMS) support on mobile radio interface
(Release 1998)
3GPP TS 45.005 v5.5.0 (2002-08)
3GPP TS 45.008 V5.8.0 (2002-08)
3GPP TS 45.010 V5.1.0 (2002-08)
3GPP TS 46.010 V5.0.0 (2002-06)
Technical Specification Group GSM/EDGE. Radio Access Network;
Radio transmission and reception (Release 5)
Technical Specification Group GSM/EDGE
Radio Access Network; Radio subsystem link control (Release 5)
Technical Specification Group GSM/EDGE
Radio Access Network; Radio subsystem synchronization (Release 5)
Technical Specification Group Services and System Aspects;
Full rate speech; Transcoding (Release 5)
Technical Specification Group Services and System Aspects;
3GPP TS 46.011 V5.0.0 (2002-06)
Full rate speech; Substitution and muting of lost frames for
full rate speech channels (Release 5)
Technical Specification Group Services and System Aspects;
3GPP TS 46.012 V5.0.0 (2002-06)
Full rate speech; Comfort noise aspect for full rate speech traffic
channels (Release 5)
Technical Specification Group Services and System Aspects;
3GPP TS 46.031 V5.0.0 (2002-06)
Full rate speech; Discontinuous Transmission (DTX) for full rate speech
traffic channels (Release 5)
Technical Specification Group Services and System Aspects;
3GPP TS 46.032 V5.0.0 (2002-06)
Full rate speech; Voice Activity Detector (VAD) for full rate speech traffic
channels (Release 5)
Digital cellular telecommunications system (Phase 2+);
TS 100 913V8.0.0 (1999-08)
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General on Terminal Adaptation Functions (TAF) for Mobile Stations
(MS) (GSM 07.01 version 8.0.0 Release 1999)
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Product Technical Specification &
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Specification Reference
Title
Digital cellular telecommunications system (Phase 2+);
General requirements on interworking between the Public Land Mobile
Network (PLMN) and the Integrated Services Digital Network (ISDN) or
Public Switched Telephone Network (PSTN) (GSM 09.07 version 8.0.0
Release 1999)
GSM 09.07 V8.0.0 (1999-08)
3GPP TS 51.010-1 v5.0.0 (200209)
Technical Specification Group GSM/EDGE ; Radio Access
Network ;Digital cellular telecommunications system (Phase 2+);Mobile
Station (MS) conformance specification; Part 1: Conformance
specification (Release 5)
3GPP TS 51.011 V5.0.0 (2001-12)
Technical Specification Group Terminals; Specification of the Subscriber
Identity Module - Mobile Equipment (SIM - ME) interface (Release 5)
Digital cellular telecommunications system (Phase 2);
ETS 300 641 (1998-03)
Specification of the 3 Volt Subscriber Identity Module - Mobile Equipment
(SIM-ME) interface (GSM 11.12 version 4.3.1)
GCF-CC V3.7.1 (2002-08)
Global Certification Forum – Certification criteria
The WISMO228 can only be used for mobile and fixed applications. The antenna(s) used for the
transmitter must be installed at a minimum distance of 20cm from all persons and must not be co‐
located or operated 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.
Note that when installed in portable devices, the RF exposure condition requires a separate
mandatory equipment authorization for the final device.
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Safety Recommendations (for Information Only)
Warning:
For the efficient and safe operation of your GSM application
based on the WISMO228, please read the following information
carefully.
RF Safety
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.
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.
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.
Antenna Care and Replacement
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Do not use the GSM terminal with a damaged antenna. If a damaged antenna comes into contact
with the skin, a minor burn may result. Replace a damaged antenna immediately. Consult your
manual to see if you may change the antenna yourself. If so, use only a manufacturer‐approved
antenna. Otherwise, have your antenna repaired by a qualified technician.
Use only the supplied or approved antenna. Unauthorized antennas, modifications or attachments
could damage the terminal and may contravene local RF emission regulations or invalidate type
approval.
General Safety
Driving
Check the laws and the regulations regarding the use of cellular devices in the area where you have
to drive as you always have to comply with them. When using your GSM terminal while driving,
please:
•
give full attention to driving,
•
pull off the road and park before making or answering a call if driving conditions so
require.
Electronic Devices
Most electronic equipment, for example in hospitals and motor vehicles, is shielded from RF energy.
However, RF energy may affect some improperly shielded electronic equipment.
Vehicle Electronic Equipment
Check your vehicle manufacturer representative to determine if any on‐board electronic equipment
is adequately shielded from RF energy.
Medical Electronic Equipment
Consult the manufacturer of any personal medical devices (such as pacemakers, hearing aids, etc...)
to determine if they are adequately shielded from external RF energy.
Turn your terminal OFF in health care facilities when any regulations posted in the area instruct you
to do so. Hospitals or health care facilities may be using RF monitoring equipment.
Aircraft
Turn your terminal OFF before boarding any aircraft.
•
Use it on the ground only with crew permission.
•
Do not use it in the air.
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To prevent possible interference with aircraft systems, Federal Aviation Administration (FAA)
regulations require you to have permission from a crew member to use your terminal while the
aircraft is on the ground. To prevent interference with cellular systems, local RF regulations prohibit
using your modem while airborne.
Children
Do not allow children to play with your GSM terminal. It is not a toy. Children could hurt
themselves or others (by poking themselves or others in the eye with the antenna, for example).
Children could damage the modem, or make calls that increase your modem bills.
Blasting Areas
To avoid interfering with blasting operations, turn your unit OFF when in a « blasting area » or in
areas posted: « turn off two‐way radio ». Construction crews often use remote control RF devices to
set off explosives.
Potentially Explosive Atmospheres
Turn your terminal OFF when in any area with a potentially explosive atmosphere. It is rare, but
your application or its accessories could generate sparks. Sparks in such areas could cause an
explosion or fire resulting in bodily injuries or even death.
Areas with a potentially explosive atmosphere are often, but not always, clearly marked. They
include fuelling areas such as petrol stations; below decks on boats; fuel or chemical transfer or
storage facilities; and areas where the air contains chemicals or particles, such as grain, dust, or
metal powders.
Do not transport or store flammable gas, liquid, or explosives in the compartment of your vehicle
which contains your terminal or accessories.
Before using your terminal in a vehicle powered by liquefied petroleum gas (such as propane or
butane) ensure that the vehicle complies with the relevant fire and safety regulations of the country
in which the vehicle is to be used.
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Description                     : WISMO228 - Product Technical Specification and Customer Design Guideline
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Subject                         : WISMO228 - Product Technical Specification and Customer Design Guideline

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