Sierra Wireless AIRPRIME WISMO218 Technical Specifications
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Sierra Wireless AIRPRIME WISMO218 Technical Specifications

Self-contained egsm/gprs 900/1800 dual-band embedded module
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Product Technical Specification
& Customer Design Guidelines
AirPrime WISMO218
WA_DEV_W218_PTS_002
006
April 29, 2010

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Summary of Contents for Sierra Wireless AIRPRIME WISMO218

  • Page 1 Product Technical Specification & Customer Design Guidelines AirPrime WISMO218 WA_DEV_W218_PTS_002 April 29, 2010...

  • Page 2: Important Notice

    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.

  • Page 3: Contact Information

    D442,170 D459,303 and other patents pending. This product includes technology licensed from QUALCOMM Manufactured or sold by Sierra Wireless or its licensees under one or more patents licensed from InterDigital Group. Copyright © 2010 Sierra Wireless. All rights reserved. Trademarks ®...

  • Page 4: Document History

    Product Technical Specification & Customer Design Guidelines Consult our website for up-to-date product descriptions, documentation, application notes, firmware upgrades, troubleshooting tips, and press releases: Document History Version Date April 22, 2009 April 28, 2009 July 17, 2009 WA_DEV_W218_PTS_002 www.sierrawireless.com Updates Creation Addition of Power Consumption table and software note in section 3.3.2 Document Cover/Footer: Updated the file name (from...
  • Page 5 Product Technical Specification & Customer Design Guidelines Version Date August 12, 2009 September 10, 2009 October 27, 2009 November 23, 2009 January 20, 2010 April 29, 2010 WA_DEV_W218_PTS_002 Updates § 5.5.3: Updated the figure to display it rotated 90 degrees counterclockwise.
  • Page 6 Product Technical Specification & Customer Design Guidelines Version Date WA_DEV_W218_PTS_002 Updates Updated document template. Updated section 8 Certification Compliance and Recommended Standards. Updated Figure 46 Castellation Pin Dimension and Location. Updated section 3.18 Reset. Updated section 3.2.4.1 Recommended Components. Rev 006 April 29, 2010...

  • Page 7: Table Of Contents

    LIST OF FIGURES... 11 LIST OF TABLES ... 13 1. REFERENCES ... 15 1.1. Reference Documents ... 15 1.1.1. Sierra Wireless Reference Documentation ... 15 1.2. List of Abbreviations ... 15 2. GENERAL DESCRIPTION ... 19 2.1. General Information ... 19 2.1.1.
  • Page 8 Product Technical Specification & Customer Design Guidelines 3.6. Main Serial Link (UART) ... 37 3.6.1. Features ... 37 3.6.2. Pin Description ... 37 3.6.2.1. 5-wire Serial Interface Hardware Design... 38 3.6.2.2. 4-wire Serial Interface Hardware Design... 38 3.6.2.3. 2-wire Serial Interface Hardware Design... 38 3.6.3.
  • Page 9 4.1.3. Socket-Up Board Used ... 80 4.1.4. SIM Cards Used ... 81 4.2. Software Configurations ... 82 4.2.1. AirPrime WISMO218 Configuration ... 82 4.2.2. Equipment Configuration... 83 4.3. Template ... 84 5. TECHNICAL SPECIFICATIONS ... 85 5.1. Castellation Connector Pin Configuration ... 85 5.2.
  • Page 10 Function Status Classification ... 90 5.5. Mechanical Specifications ... 92 5.5.1. Physical Characteristics ... 92 5.5.2. AirPrime WISMO218 Dimensions ... 93 5.5.3. Recommended PCB Landing Pattern ... 94 6. PERIPHERAL DEVICES REFERENCES ... 95 6.1. General Purpose Connector ... 95 6.2.

  • Page 11: List Of Figures

    Example of V24/CMOS Serial Link Implementation for 4-wire UART ... 40 Figure 10. Example of V24/CMOS Serial Link Implementation for 5-wire UART ... 41 Figure 11. Example of Full Modem V24/CMOS Serial Link Implementation for full-UART ... 41 Figure 12. Example of SIM Socket Implementation ... 44 Figure 13.
  • Page 12 Example of an RF 50 line ... 77 Figure 42. Typical hardware configuration ... 79 Figure 43. AirPrime WISMO218 Pin Configuration ... 85 Figure 44. PCB Structure Example for the Application Board ... 88 Figure 45. Environmental classes ... 91 Figure 46.

  • Page 13: List Of Tables

    Table 1: Input Power Supply Voltage ... 25 Table 2: Power Supply Pin Descriptions ... 25 Table 3: AirPrime WISMO218 Operating Modes ... 27 Table 4: Consumption/Software Driver Recommendations ... 32 Table 5: Electrical Characteristics of Digital I/O ... 33 Table 6: SPI Bus Pin Descriptions ...
  • Page 14 Operating Mode Information ... 83 Table 42: AirPrime WISMO218 Power Consumption ... 84 Table 43: Standards Conformity for the AirPrime WISMO218 Embedded Module ... 89 Table 44: Applicable Standards and Requirements... 89 Table 45: Operating Class Temperature Range ... 90 Table 46: Standards Conformity for the AirPrime WISMO218 Embedded Module ...

  • Page 15: References

    Reference Documents Several documents are referenced throughout this specification. For more details, please consult the listed reference documents. The Sierra Wireless documents referenced herein are provided in the Sierra Wireless documentation package; however, the general reference documents which are not Sierra Wireless owned are not provided in the documentation package.
  • Page 16 Product Technical Specification & Customer Design Guidelines Abbreviation Definition Circuit Switched Data Clear To Send Digital to Analog Converter Digital Audio Interface Decibel Direct Current Data Carrier Detect Data Communication Equipment Digital Cellular System Dynamic Range Data Set Ready Data Terminal Equipment Data Terminal Ready Enhanced Full Rate E-GSM...
  • Page 17 Product Technical Specification & Customer Design Guidelines Abbreviation Definition Less Significant Bit MAXimum MICrophone MINimum Multimedia Message Service Mobile Originated Mobile Station Mobile Terminated Not Applicable Noise Factor NMEA National Marine Electronics Association NOMinal Negative Temperature Coefficient Power Amplifier Pascal (for speaker sound pressure measurements) PBCCH Packet Broadcast Control CHannel Personal Computer...
  • Page 18 Product Technical Specification & Customer Design Guidelines Abbreviation Definition SPeaKer SoftWare PSRAM Pseudo Static RAM To Be Confirmed TDMA Time Division Multiple Access Test Point Typical Urban fading profile TUHigh Typical Urban, High speed fading profile Transient Voltage Suppressor Transmit TYPical UART Universal Asynchronous Receiver-Transmitter...

  • Page 19: General Description

     Complete shielding The AirPrime WISMO218 is compliant with RoHS Directive 2002/95/EC which sets limits for the use of certain restricted hazardous substances. This directive states that “from 1st July 2006, new electrical and electronic equipment put on the market does not contain lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB) or polybrominated diphenyl ethers (PBDE)”.

  • Page 20: Firmware

     Embedded Module ready indicator  Reset 2.1.5. Firmware  Drives the AirPrime WISMO218 Embedded Intelligent Module via an AT command interface over a serial port  Full GSM/GPRS Operating System stack  Real Time Clock with calendar 2.1.6. Connection Interfaces The AirPrime WISMO218 has a 46-pin castellation form factor which provides: ...

  • Page 21: Functional Description

    Product Technical Specification & Customer Design Guidelines 2.2. Functional Description The global architecture of the AirPrime WISMO218 is shown below: Analog Interfaces AUDIO ADCs Control & Power power supplys reset 32768 Figure 1. Functional Architecture WA_DEV_W218_PTS_002 WISMO218 core core Memory...

  • Page 22: Rf Functionalities

    The frequency range for the transmit band and receive band are listed in the table below. E-GSM 900 DCS 1800 The RF part of the AirPrime WISMO218 is based on a specific dual band chip which includes:  a Digital low-IF receiver ...

  • Page 23: Interfaces

    3. Interfaces 3.1. General Interfaces The AirPrime WISMO218 has a 46-pin castellation connection, which provides access to all available interfaces. The available interfaces are listed in the table below. Subsection Name Serial Interface (SPI) Main Serial Link SIM Interface General Purpose IO...

  • Page 24: Power Supply

    Product Technical Specification & Customer Design Guidelines 3.2. Power Supply 3.2.1. Power Supply Description The power supply is one of the key elements in the design of a GSM terminal. Due to the burst emission in GSM/GPRS, the power supply must be able to deliver high current peaks in a short time.

  • Page 25: Electrical Characteristics

    This value has to be guaranteed during the burst (with 1.4A Peak in GSM or GPRS mode) (2): Maximum operating Voltage Stationary Wave Ratio (VSWR) 1.5:1 When powering the AirPrime WISMO218 with a battery, the total impedance (battery + protections + PCB) should be less than 150m. 3.2.3.

  • Page 26: Recommended Components

    Product Technical Specification & Customer Design Guidelines 3.2.4.1. Recommended Components C1, C2: 10µF +/-20% Component GRM21BR60J106KE19L CM21X5R106M06AT JMK212BJ106MG-T C2012X5R0J106MT 200nH +/-20% Component XPL2010-201ML WA_DEV_W218_PTS_002 Manufacturer MURATA KYOCERA TAYO YUDEN Manufacturer COILCRAFT Rev 006 Interfaces April 29, 2010...

  • Page 27: Power Consumption

    Product Technical Specification & Customer Design Guidelines 3.3. Power Consumption 3.3.1. Various Operating Modes There are various kinds of operating modes for the AirPrime WISMO218 as defined in the table below. Table 3: AirPrime WISMO218 Operating Modes Mode Description When VBATT power is supplied to the AirPrime WISMO218 but has not yet been OFF Mode powered ON.

  • Page 28: Power Consumption

    Power consumption performance is software related. The results listed below (typical values) are based on the software version L02_00gg.WISMO218. AirPrime WISMO218 Power Consumption Operating Mode Parameters Off Mode (AirPrime WISMO218 stand alone) Off Mode (using application note: Very Low Power Consumption*) Paging 2 (Rx burst occurrence ~0.5s)

  • Page 29: Consumption Waveform Samples

    Product Technical Specification & Customer Design Guidelines Idle Mode consumption depends on the SIM card used. Some SIM cards respond faster than others, in which case the longer the response time is, the higher the consumption is. means that the current peak is the RF transmission burst (Tx burst). means that the current peak is the RF reception burst (Rx burst), in GSM mode only (worst case).

  • Page 30: Connected Mode Current Waveform

    Product Technical Specification & Customer Design Guidelines 3.3.3.1. Connected Mode Current Waveform 3.3.3.2. Transfer Mode Class 10 Current Waveform WA_DEV_W218_PTS_002 TX PEAK TX PEAK Rev 006 Interfaces April 29, 2010...

  • Page 31: Idle Mode Page 2 Current Waveform

    Product Technical Specification & Customer Design Guidelines 3.3.3.3. Idle Mode Page 2 Current Waveform 3.3.3.4. Idle Mode Page 9 Current Waveform WA_DEV_W218_PTS_002 RX PEAK RX PEAK Rev 006 Interfaces April 29, 2010...

  • Page 32: Recommendations For Less Consumption

    Product Technical Specification & Customer Design Guidelines 3.3.4. Recommendations for Less Consumption For better power consumption, in particular for the quiescent current, it is recommended to drive the GPIOs as shown in the table below. Table 4: Consumption/Software Driver Recommendations Signal Number GPIO1...

  • Page 33: Electrical Information For Digital I/O

    Product Technical Specification & Customer Design Guidelines 3.4. Electrical Information for Digital I/O The I/Os concerned are all interfaces such as GPIOs, SPIs, etc. Table 5: Electrical Characteristics of Digital I/O 2.8 Volts Type (2V8 ) Parameter Internal 2.8V power supply Input / Output pin Absolute maximum ratings WA_DEV_W218_PTS_002...

  • Page 34: Spi Bus For Debug Trace Only

    ~SPI-CS SPI-IRQ By default, the AirPrime WISMO218 SPI interface is only used for monitoring trace for debug purposes. An SPI-to-UART2 conversion circuit is required to convert the SPI trace to UART2. Also, the SPI-IRQ (pin 25) is required for interrupt. Again, note that the SPI interface of the AirPrime WISMO218 is not open for application use other than debug trace.

  • Page 35: Figure 5. Example Of An Spi To Uart2 Interface Conversion Implementation

    Product Technical Specification & Customer Design Guidelines Figure 5. Example of an SPI to UART2 Interface Conversion Implementation The following table lists the recommended components to use in implementing the SPI to UART2 interface. Component Description/Details U103 SC16IS750IPW X101 3, 6864MHz 86SMX surface mount crystal (971-3131) R104, R105 10K...

  • Page 36: April 29, 2010

    Product Technical Specification & Customer Design Guidelines Figure 6. Example of RS-232 Level Shifter Implementation for UART2 The following table lists the recommended components to use in implementing a UART transceiver circuitry. Component Description/Details U200 LTC2804IGN-1 L200 LQH2M CN100K02L J200 096615276119 SUBD9F R202 R204...

  • Page 37: Main Serial Link (Uart)

    The rising time and falling time of the reception signals (mainly CT103/TXD) have to be less than 300ns. Tip: The AirPrime WISMO218 is designed to operate using all the serial interface signals. In particular, it is recommended to use ~CT105/RTS and ~CT106/CTS for hardware flow control in order to avoid data corruption during transmissions.

  • Page 38: 5-Wire Serial Interface Hardware Design

     The signals ~CT105/RTS*, ~CT106/CTS* are not used, please configure using the AT command, AT + IFC = 0,0 (see document [2] AirPrime WISMO218 AT Commands Manual).  The signal ~CT105/RTS* can be looped back to ~CT106/CTS* from both the AirPrime WISMO218 side and from the DTE side.

  • Page 39: Figure 7. Example Of Rs-232 Level Shifter Implementation For Uart

    R1 and R2 are necessary only during Reset state to force the ~CT125/RI and ~CT109/DCD signals to HIGH level. The ADM3307EACP can be powered by the VCC_2V8 (pin 46) of the AirPrime WISMO218 or by an external regulator at 2.8V.

  • Page 40: V24/Cmos Possible Design

    Product Technical Specification & Customer Design Guidelines 3.6.3.1. V24/CMOS Possible Design WISMO218 ( DCE ) Figure 8. Example of V24/CMOS Serial Link Implementation for 2-wire UART WISMO218 ( DCE ) Figure 9. Example of V24/CMOS Serial Link Implementation for 4-wire UART WA_DEV_W218_PTS_002 ON/~OFF Customer application...

  • Page 41: Figure 10. Example Of V24/Cmos Serial Link Implementation For 5-Wire Uart

    The UART interface is a 2.8V type, but is 3V tolerant. Tip: The AirPrime WISMO218 UART is designed to operate using all the serial interface signals. In particular, it is recommended to use ~CT105/RTS and ~CT106/CTS for hardware flow control in order to avoid data corruption during transmission.

  • Page 42: Sim Interface

    Product Technical Specification & Customer Design Guidelines 3.7. SIM Interface The Subscriber Identification Module can be directly connected to the AirPrime WISMO218 through this dedicated interface. 3.7.1. Features The SIM interface controls both 1.8V and 3V SIM cards. It is recommended to add Transient Voltage Suppressor diodes (TVS) on the signal connected to the SIM socket in order to prevent any Electrostatic Discharge.

  • Page 43: Pin Description

    Product Technical Specification & Customer Design Guidelines Table 9: Electrical Characteristics of SIM Interface Parameter SIM-IO V SIM-IO V ~SIM-RST, SIM-CLK SIM-IO V ~SIM-RST, SIM-IO, SIM- SIM-VCC Output Voltage SIM-VCC current SIM-CLK Rise/Fall Time ~SIM-RST, Rise/Fall Time SIM-IO Rise/Fall Time SIM-CLK Frequency 3.7.2.

  • Page 44: Application

    3.7.3.1. SIM Socket Connection Table 12: Pin Description of the SIM Socket Signal Pin Number Note: CC4 and CC8 are not connected as the AirPrime WISMO218 does not support SIM detect feature. WA_DEV_W218_PTS_002 Description SIM-VCC ~SIM-RST SIM-CLK Not connected GROUND...

  • Page 45: General Purpose Input/Output

    3.8. General Purpose Input/Output The AirPrime WISMO218 provides up to 3 General Purpose I/Os. They are used to control any external device such as an LCD or a Keyboard backlight. These GPIOs offer the possibility to read the pin state whatever their direction may be.

  • Page 46: Analog To Digital Converter

    3.9. Analog to Digital Converter One Analog to Digital Converter input is provided by the AirPrime WISMO218. It is a 10-bit resolution converter, ranging from either 0 to 1V or 0 to 3V, depending on the general purpose input mode.

  • Page 47: Analog Audio Interface

    Customer Design Guidelines 3.10. Analog Audio Interface The AirPrime WISMO218 supports one microphone input and one speaker output. It also includes an echo cancellation feature which allows hands free function. In some cases, ESD protection must be added on the audio interface lines.

  • Page 48: Speaker Features

    The input voltage depends on the input micro gain set by the AT command. Please refer to document [2], AirPrime WISMO218 AT Commands Manual. Because both MICP and MICN are internally biased, it is necessary to use a coupling capacitor to connect an audio signal provided by an active generator.

  • Page 49: Pin Description

    The output voltage depends on the output speaker gain set by the AT command. Please refer to document [2] AirPrime WISMO218 AT Commands Manual. If a single-ended connection is used, only SPKP has to be connected. The result is a maximal output power divided by 2.

  • Page 50: Figure 15. Example Of Mic Input Differential Connection With Lc Filter

    Product Technical Specification & Customer Design Guidelines 3.10.4.1.1. Microphone Differential Connection Example When a differential connection of MIC is used, it is necessary to add a 2.2K resistor from MICN to GND in order to have proper bias of the microphone. Figure 15.

  • Page 51: Figure 17. Example Of Mic Input Single-Ended Connection With Lc Filter

    Product Technical Specification & Customer Design Guidelines 3.10.4.1.1.1. Recommended Components Component Description/Details 12pF to 33pF C2, C3, C4 47pF L1, L2 100nH 3.10.4.1.2. Microphone Single-Ended Connection Example When single-ended connection is used for MIC, MICN is just left open. Figure 17. Example of MIC Input Single-Ended connection with LC Filter *Z2 is from 200Hz to 4kHz.

  • Page 52: Speaker Spkp And Spkn

    Product Technical Specification & Customer Design Guidelines Figure 18. Example of MIC Input Single-Ended Connection without LC Filter *Z2 is from 200Hz to 4kHz. For more characteristics refer to section 3.2.2 Electrical Characteristics. The capacitor C1 is highly recommended to eliminate TDMA noise. Note that C1 must be close to the microphone.

  • Page 53: Design Recommendation

    Using a single-ended connection includes losing output power (-6dB) as compared to a differential connection. The connection between the AirPrime WISMO218 pins and the speaker must be designed to keep the serial impedance lower than 1.5 in a single-ended connection.

  • Page 54: Recommended Speaker Characteristics

    Product Technical Specification & Customer Design Guidelines The capacitors have to be soldered in parallel to the microphone: Figure 21. Microphone 3.10.5.3. Recommended Speaker Characteristics Type of speakers: Electro-magnetic /10mW Impedance: 8 for hands-free Impedance: 32 for heads kit Sensitivity: 110dB SPL min Receiver frequency response is compatible with the GSM specifications.

  • Page 55: Table 20: Murata Examples

    Product Technical Specification & Customer Design Guidelines The table below shows some examples with different Murata components: Table 20: Murata Examples Package 0402 Filtered band GSM900 100nH Value Types Inductor Position Serial Manufacturer Murata Rated 150mA LQG15HSR10J02 or Reference LQG15HNR10J02 Package 0603 GSM900...

  • Page 56: Audio Track And Pcb Layout Recommendation

    Product Technical Specification & Customer Design Guidelines 3.10.5.5. Audio Track and PCB Layout Recommendation To avoid TDMA noise, it is recommended to surround the audio tracks with ground as shown in the following figure: Figure 22. Audio Track Design For differential connections, it is necessary to add a 2.2KΩ resistor from MICN to GND to have a proper bias of the microphone.

  • Page 57: Figure 24. Single-Ended Audio Connection

    MICP signal, should act as the differential line pair. And this audio ground should only be connected to the AirPrime WISMO218 embedded module ground as close as possible to the castellation GND pin of AirPrime WISMO218. It is the same case for SPKP and SPKN.

  • Page 58: Pulse-Width Modulators (Pwms)

    Product Technical Specification & Customer Design Guidelines 3.11. Pulse-Width Modulators (PWMs) The AirPrime WISMO218 contains two Pulse-Width Modulators (PWMs). They can be used in conjunction with an external transistor for driving a vibrator, or a backlight LED. 3.11.1. Features Each PWM uses two 7-bit unsigned binary numbers: one for the output period and one for the pulse width or the duty cycle.

  • Page 59: Figure 26. Example Of A Led Driven By The Pwm0 Or Pwm1 Output

    Product Technical Specification & Customer Design Guidelines Figure 26. Example of a LED Driven by the PWM0 or PWM1 Output The value of R607 can be harmonized depending on the LED (D605) characteristics. The recommended digital transistor to use for T601 is the DTC144EE from ROHM. WA_DEV_W218_PTS_002 Rev 006 Interfaces...

  • Page 60: Buzzer Output

    Product Technical Specification & Customer Design Guidelines 3.12. BUZZER Output The signal BUZZER outputs a square wave at the desired tone frequency. The tone frequencies are programmable and can be re-programmed on-the-fly to generate monophonic audio ringtones or alert tones. The tone level can also be adjusted in 4dB steps, or it can be muted. 3.12.1.

  • Page 61: Figure 28. Example Of Buzzer Implementation

    Product Technical Specification & Customer Design Guidelines Figure 28. Example of Buzzer Implementation Where:  R1 must be chosen in order to limit the current at I function of the frequency and the duty cycle used.  D1 = BAV70T-7 or BAS16 (for example) ...

  • Page 62: Calculations Of The Low Filter

    Product Technical Specification & Customer Design Guidelines 3.12.3.1. Calculations of the Low Filter Req is the total resistor in line. C is the capacitive charge on T1 and the ground. The cut-off frequency (Fc) must be higher than FBUZZ-OUT. Due to the conception of this signal, the frequency modulation of the BUZZER signal is 64* FBUZZ- OUT.

  • Page 63: On/~Off Signal

    ON/~OFF signal is by default at HIGH level. A LOW level signal has to be provided on the ON/~OFF pin to switch ON the AirPrime WISMO218. Caution: All external signals must be inactive when the AirPrime WISMO218 is OFF to avoid any damage when starting and to allow the AirPrime WISMO218 to start and stop correctly.

  • Page 64: Application

    Product Technical Specification & Customer Design Guidelines 3.13.3. Application Figure 30. Example of the ON/~OFF Pin Connection Either By a Switch or Via an Open Collector Transistor 3.13.3.1. Power ON Figure 31. Power-ON Sequence (no PIN code activated) WA_DEV_W218_PTS_002 Switch Rev 006 Interfaces ON/~OFF...
  • Page 65 Once the AirPrime WISMO218 is properly powered ON, the WISMO_READY pin will set to HIGH level to acknowledge the successful powering ON of the AirPrime WISMO218 before it is ready to operate. The ON/~OFF signal can be left at LOW level until power off.

  • Page 66: Power Off

    Once the AirPrime WISMO218 receives the AT+CPOF command, the AirPrime WISMO218 will be deregistered from the network. The WISMO_READY pin will become LOW to indicate that AT commands are no longer available for the AirPrime WISMO218. If the ON/~OFF signal is HIGH, then the AirPrime WISMO218 will also be switched off.

  • Page 67: Wismo_Ready Indication

    Customer Design Guidelines 3.14. WISMO_READY Indication This signal indicates the ready status of the AirPrime WISMO218 after powering on. Please note that there is an initial positive pulse of less than 200ms during power ON. For details, please refer to Figure 31 Power-ON Sequence (no PIN code activated).

  • Page 68: Vcc_2V8 Output

    Customer Design Guidelines 3.15. VCC_2V8 Output The VCC_2V8 output can only be used for pull-up resistor(s) and as a reference supply. This voltage supply is available when the AirPrime WISMO218 is switched on. 3.15.1. Features Table 29: Electrical Characteristics of the Signals...

  • Page 69: Bat-Rtc (Backup Battery)

    This pin is used as a back-up power supply for the internal Real Time Clock. The RTC is supported by the AirPrime WISMO218 when VBATT is available but a back-up power supply is needed to save date and hour when VBATT is switched off.

  • Page 70: Super Capacitor

    Product Technical Specification & Customer Design Guidelines 3.16.3.1. Super Capacitor Figure 33. RTC Supplied by a Gold Capacitor Estimated range with 0.47 Farad Gold Cap: 25 minutes minimum. Note: The Gold Capacitor maximum voltage is 3.9V. 3.16.3.2. Non-Rechargeable Battery Figure 34. RTC Supplied by a Non Rechargeable Battery The diode D1 is mandatory to prevent the non rechargeable battery from being damaged.

  • Page 71: Rechargeable Battery Cell

    Rechargeable battery cell: Sanyo ML614 Estimated range with fully charged 3.4mAh rechargeable battery: at least 7 days. Caution: Before battery cell assembly, ensure that cell voltage is lower than 3.0V to avoid damaging the AirPrime WISMO218. WA_DEV_W218_PTS_002 Rev 006 Interfaces...

  • Page 72: Tx_Ctrl Signal For Tx Burst Indication

    Customer Design Guidelines 3.17. TX_CTRL Signal for TX Burst Indication 3.17.1. Features The TX_CTRL signal is a 2.8V indication signal for TX Burst with a 100K pull-up resistor implemented inside the AirPrime WISMO218 embedded module. Table 33: TX_CTRL Status AirPrime WISMO218 State...

  • Page 73: Pin Description

    Product Technical Specification & Customer Design Guidelines 3.17.2. Pin Description Table 35: TX_CTRL Signal Pin Descriptions Signal Number TX_CTRL 3.17.3. Application The TX burst indication signal, TX_CTRL, can be used to drive a LED through a transistor. It will then be a good visual indicator for any TX activities.

  • Page 74: Reset

    Customer Design Guidelines 3.18. Reset The AirPrime WISMO218 has an input ~RESET pin. This is a hardware reset and should only be used for emergency reset. The ~RESET pin should be kept at low level for at least 500µs to guarantee a proper reset to take place.

  • Page 75: Application

    3.18.3. Application If the « emergency » reset is used, it has to be driven by an open collector or an open drain output (due to the internal pull-up resistor embedded into the AirPrime WISMO218) as shown in the figure below.

  • Page 76: Rf Interface

    The impedance is 50 nominal and the DC resistance is 0. 3.19.1. RF Connection The RF input/output of the AirPrime WISMO218 is through one of the castellation pins (Pin 21). A 50 stripline can be used to connect to standard RF connectors such as SMA, UFL, etc. for antenna connection.

  • Page 77: Figure 41. Example Of An Rf 50 Line

    It is also possible to use an antenna chip or to design a PCB antenna directly on the application board. The ANT pin of the AirPrime WISMO218 is ESD protected, for both ±4KV contact and ±8KV air discharge. WA_DEV_W218_PTS_002 ...

  • Page 78: Consumption Measurement Procedure

    This chapter describes the consumption measurement procedure used to obtain the AirPrime WISMO218 consumption specification. The AirPrime WISMO218 consumption specification values are measured for all operating modes available on the product. Consumption results are highly dependent on the hardware configuration used during measurement.

  • Page 79: Figure 42. Typical Hardware Configuration

    The AX502 standalone power supply is used to supply all motherboard components except the AirPrime WISMO218. The goal is to separate the AirPrime WS Series Development Kit board consumption from the AirPrime WISMO218 consumption - which is measured by the other power supply, the 66321B “current measuring power supply”.

  • Page 80: Airprime Ws Series Development Kit

    4.1.3. Socket-Up Board Used There is an adaptor board which is used to adapt the AirPrime WISMO218 to work on the AirPrime WS Series Development Kit. It is called the socket-up board (WM0801706-020-20). On this socket up board, the soldering point of J203, J204, JP101, JP102, JP103, JP104, JP105, JP106 and JP107 must be opened.

  • Page 81: Sim Cards Used

    Consumption measurement may be performed with either 3-Volt or 1.8-Volt SIM cards. However, all specified consumption values are for a 3-Volt SIM card. Caution: The SIM card’s voltage is supplied by the AirPrime WISMO218’s power supply. Consumption measurement results may vary depending on the SIM card used.

  • Page 82: Software Configurations

    4.2.1. AirPrime WISMO218 Configuration The AirPrime WISMO218 software configuration is simply performed by selecting the operating mode to be used to perform the measurement. A description of the operating modes and the procedure used to change the operating mode are given in the appendix of document [2] AirPrime WISMO218 AT Commands Manual.

  • Page 83: Equipment Configuration

    Customer Design Guidelines 4.2.2. Equipment Configuration The communication tester is set according to the AirPrime WISMO218 operating mode. Paging during idle modes, TX burst power, RF band and GSM/DCS/GPRS may be selected on the communication tester. Listed in the table below is the network analyzer configuration according to operating mode:...

  • Page 84: Template

    Table 42: AirPrime WISMO218 Power Consumption AirPrime WISMO218 Power Consumption Operating Mode Parameters Off Mode (AirPrime WISMO218 stand alone) Off Mode (using application note : Very Low Power Consumption*) Paging 2 (Rx burst occurrence ~0.5s) Idle Mode**...

  • Page 85: Technical Specifications

    5. Technical Specifications 5.1. Castellation Connector Pin Configuration Figure 43. AirPrime WISMO218 Pin Configuration WA_DEV_W218_PTS_002 Rev 006 April 29, 2010...

  • Page 86: Castellation Pin

    Product Technical Specification & Customer Design Guidelines 5.2. Castellation Pin 5.2.1. Pin-Out Description Signal Description Speaker output positive SPKP 32 ohms Speaker output SPKN negative 32 ohms Microphone input MICP positive Microphone input MICN negative Analog to digital AUX_ADC0 converter Power supply for RTC BAT-RTC backup...

  • Page 87: Recommended Connection When Not Used

    Product Technical Specification & Customer Design Guidelines 5.2.2. Recommended Connection When Not Used The table below gives the recommended connection for any unused pins. Recommended Signal Connection when not Used SPKP open SPKN open MICP open MICN open AUX_ADC0 Ground BAT-RTC open WISMO_READY...

  • Page 88: Pcb Specification For Application Board

    PCB Specification for Application Board In order to save costs for simple applications, a cheap PCB structure can be used for the application board of the AirPrime WISMO218. A 4-layer through-hole type PCB structure can be used. Figure 44. PCB Structure Example for the Application Board Due to the limited layers of 4-layer PCBs, sensitive signals like audio, SIM and clocks cannot be protected by 2 adjacent ground layers.

  • Page 89: Reliability Compliance And Recommended Standards

    Standards Conformity for the AirPrime WISMO218 Embedded Module Abbreviation 5.4.2. Applicable Standards Listing The table hereafter gives the basic list of standards applicable to the AirPrime WISMO218 embedded module. Note: References to any features can be found from these standards.

  • Page 90: Environmental Specifications

    2.0 w/COR 5.4.3. Environmental Specifications The AirPrime WISMO218 embedded module is compliant with the operating classes listed in the table below. The ideal temperature range of the environment for each operating class is also specified. Table 45: Operating Class Temperature Range...

  • Page 91: Figure 45. Environmental Classes

    Product Technical Specification & Customer Design Guidelines not affect the ability of the AirPrime WISMO218 to connect to the cellular network and be fully functional, as it does within the Class A range. The detailed climatic and mechanics standard environmental constraints applicable to the AirPrime...

  • Page 92: Mechanical Specifications

    Product Technical Specification & Customer Design Guidelines 5.5. Mechanical Specifications 5.5.1. Physical Characteristics The AirPrime WISMO218 has a nearly-complete self-contained shield.  Overall dimensions: 25.0 x 25.0 x 2.8 mm (excluding label thickness)  Weight: 3.8g WA_DEV_W218_PTS_002 Rev 006 Technical Specifications...

  • Page 93: Airprime Wismo218 Dimensions

    Product Technical Specification & Customer Design Guidelines 5.5.2. AirPrime WISMO218 Dimensions Figure 46. Castellation Pin Dimension and Location WA_DEV_W218_PTS_002 Rev 006 Technical Specifications April 29, 2010...

  • Page 94: Recommended Pcb Landing Pattern

    Product Technical Specification & Customer Design Guidelines Figure 47. AirPrime WISMO218 Dimensions 5.5.3. Recommended PCB Landing Pattern Refer to document [4] Customer Process Guideline for AirPrime WS Series. WA_DEV_W218_PTS_002 Rev 006 Technical Specifications April 29, 2010...

  • Page 95: Peripheral Devices References

     MOLEX 99228-0002 (connector) / MOLEX 91236-0002 (holder) (see http://www.molex.com ) Note: As the AirPrime WISMO218 has no SIM detect feature, the CC4 and CC8 pin should be left open. 6.3. Microphone Microphones can be obtained from the following recommended suppliers: ...

  • Page 96: Antenna Cable

    Product Technical Specification & Customer Design Guidelines 6.5. Antenna Cable Listed below are the recommended antenna cables to mount on the AirPrime WISMO218:  RG178  RG316 6.6. GSM Antenna GSM antennas and support for antenna adaptation can be obtained from manufacturers such as: ...

  • Page 97: Noises And Design

     It is recommended to use a metallic case or plastic casing with conductive paint. Note: The AirPrime WISMO218 does not include any protection against overvoltage. 7.2. Power Supply The power supply is one of the key issues in the design of a GSM terminal.

  • Page 98: Certification Compliance And Recommended Standards

    8. Certification Compliance and Recommended Standards 8.1. Certification Compliance The AirPrime WISMO218 Embedded Module is compliant with the following requirements. Table 46: Standards Conformity for the AirPrime WISMO218 Embedded Module Domain Safety standard Health standard (EMF Exposure Evaluation) Efficient use of the radio frequency spectrum 8.2.
  • Page 99 RF exposure compliance. Installed in other portable devices, the exposure condition requires a separate equipment authorization. IMPORTANT: Manufacturers of mobile or fixed devices incorporating the AirPrime WISMO218 Embedded Module are advised to  clarify any regulatory questions, ...

  • Page 100: Appendix

    9. Appendix 9.1. Safety Recommendations (for Information Only) For the efficient and safe operation of your GSM application based on the AirPrime WISMO218, please read the following information carefully. 9.1.1. RF Safety 9.1.1.1. General Your GSM terminal is based on the GSM standard for cellular technology. The GSM standard is spread all over the world.

  • Page 101: Antenna Care And Replacement

    Product Technical Specification & Customer Design Guidelines 9.1.1.4. Antenna Care and Replacement 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.

  • Page 102: 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. 9.1.2.7.

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