Sierra Wireless WISMO228 User manual


WA_DEV_W228_PTS_002
001
August 26, 2009
WISMO228 WIreless Standard MOdem
Product Technical Specification &
Customer Design Guidelines

WA_DEV_W228_PTS_002 Rev 001 Page 2 of 108
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.

WA_DEV_W228_PTS_002 Rev 001 Page 4 of 108
Product Technical Specification &
Customer Design Guidelines
Contact Information
Sales Desk:
Phone: [phone]
Hours: 8:00 AM to 5:00 PM Pacific Time
E-mail:
[e-mail]
Post:
Sierra Wireless
13811 Wireless Way
Richmond, BC
Canada V6V 3A4
Fax: [phone]
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 Date History of the evolution
001 August 26, 2009 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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Product Technical Specification &
Customer Design Guidelines
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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Product Technical Specification &
Customer Design Guidelines
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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Customer Design Guidelines
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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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 &
Customer Design Guidelines
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 &
Customer Design Guidelines
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

WA_DEV_W228_PTS_002 Rev 001 Page 15 of 108
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

WA_DEV_W228_PTS_002 Rev 001 Page 16 of 108
Product Technical Specification &
Customer Design Guidelines
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

WA_DEV_W228_PTS_002 Rev 001 Page 17 of 108
Product Technical Specification &
Customer Design Guidelines
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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Product Technical Specification &
Customer Design Guidelines
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



WA_DEV_W228_PTS_002 Rev 001 Page 19 of 108
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

WA_DEV_W228_PTS_002 Rev 001 Page 20 of 108
Product Technical Specification &
Customer Design Guidelines
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