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Sierra Wireless WISMO218 Technical Specifications

Wireless standard modem product technical specification & customer design guidelines
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Product Technical Specification &
Customer Design Guidelines
WISMO218 WIreless Standard MOdem
WA_DEV_W218_PTS_002
005
December 17, 2009

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Summary of Contents for Sierra Wireless WISMO218

  • Page 1 Product Technical Specification & Customer Design Guidelines WISMO218 WIreless Standard MOdem WA_DEV_W218_PTS_002 December 17, 2009...

  • Page 2: Safety And Hazards

    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: Limitations Of Liability

    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.

  • Page 4: Contact Information

    Pin 18, TX_CTRL from “2.8V TX Burst Indicator” to “not connected”. § 5.4: Updated the description for Class B condition. § 5.5.2: Updated the section description Deleted Figure 40: Recommended PCB landing pattern for WISMO218 Product Technical Specification & Customer Design Guidelines 1-604-232-1488 8:00 AM to 5:00 PM Pacific Time sales@sierrawireless.com...
  • Page 5 § 3.8: Changed the number of General Purpose I/Os from 11 to 3. § 3.9.2 Added a Caution box after the table. § 3.10.4.1.1 and 3.104.1.2: Removed the GND within the WISMO218 in the figures (figures 15, 16, 17 and 18) §...
  • Page 6 Date October 27, 2009 November 23, 2009 WA_DEV_W218_PTS_002 Rev 005 List of Updates  Updated Class A Operating Temperature Range  Updated documentation reference ON/~OFF Signal:  Added an about controlling the signal via an open extra note collector switching transistor ...

  • Page 7: Table Of Contents

    LIST OF FIGURES ... 12 LIST OF TABLES ... 14 1. REFERENCES ... 16 Reference Documents ... 16 Sierra Wireless Reference Documentation ... 16 List of Abbreviations ... 16 2. GENERAL DESCRIPTION ... 20 General Information ... 20 Overall Dimensions ... 20 Environment and Mechanics ...
  • Page 8 SPI Bus for Debug Trace ONLY ... 35 Pin Description ... 35 SPI Waveforms ... 35 Main Serial Link (UART) ... 38 Features ... 38 Pin Description ... 38 5-wire serial interface hardware design: ... 39 4-wire serial interface hardware design: ... 39 2-wire serial interface hardware design: ...
  • Page 9 Antenna Specifications ... 80 4. CONSUMPTION MEASUREMENT PROCEDURE ... 83 Hardware Configuration ... 83 Equipment ... 83 WISMO218 Development Kit ... 85 Socket-Up Board Used ... 86 SIM Cards Used ... 86 Software Configurations ... 87 WISMO218 Configuration ... 87...
  • Page 10 Class A ... 95 Class B ... 95 Mechanical Specifications ... 97 Physical Characteristics ... 97 WISMO218 Dimensions ... 98 Recommended PCB Landing Pattern ... 100 6. PERIPHERAL DEVICES REFERENCES ... 101 General Purpose Connector ... 101 SIM Card Reader ... 101 Microphone ...
  • Page 11 Product Technical Specification & Customer Design Guidelines Blasting Areas ... 109 Potentially Explosive Atmospheres ... 109 WA_DEV_W218_PTS_002 Rev 005 Page 11 of 109...

  • Page 12: List Of Figures

    Example of V24/CMOS Serial Link Implementation for 4-wire UART ... 41 Figure 10. Example of V24/CMOS Serial Link Implementation for 5-wire UART ... 42 Figure 11. Example of Full Modem V24/CMOS Serial Link Implementation for full-UART ... 42 Figure 12. Example of SIM Socket Implementation... 46 Figure 13.
  • Page 13 Figure 41. Example of an RF 50 line ... 81 Figure 42. Typical hardware configuration ... 84 Figure 43. WISMO218 Pin Configuration ... 90 Figure 44. PCB Structure Example for the Application Board ... 94 Figure 45. Environmental classes ... 96 Figure 46.

  • Page 14: List Of Tables

    Table 1. Input Power Supply Voltage ... 26 Table 2. Power Supply Pin Descriptions ... 26 Table 3. WISMO218 Operating Modes ... 28 Table 4. Consumption/Software Driver Recommendations ... 33 Table 5. Electrical Characteristics of Digital I/O ... 34 Table 6.
  • Page 15 Table 39. Antenna Specifications... 81 Table 40. Equipment Reference List ... 85 Table 41. Operating Mode Information ... 88 Table 42. WISMO218 Power Consumption ... 89 WA_DEV_W218_PTS_002 Rev 005 Product Technical Specification & Customer Design Guidelines Page 15 of 109...

  • Page 16: 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 17 Abbreviation CODEC COder DECoder Central Processing Unit Coding Scheme 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 18 Abbreviation Intermediate Frequency IMEI International Mobile Equipment Identification Input / Output Liquid Crystal Display Light Emitting Diode Low Noise Amplifier 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...
  • Page 19 Abbreviation Request To Send Receive Serial CLock Serial DAta Subscriber Identification Module Surface Mounted Device/Design Short Message Service Serial Peripheral Interface Sound Pressure Level 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...

  • Page 20: General Description

     Complete shielding The 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 21: Firmware

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

  • Page 22: Functional Description

    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 WISMO218 is based on a specific dual band chip which includes:  a Digital low-IF receiver...

  • Page 23: Baseband Functionalities

     a dual-band LNAs (Low Noise Amplifier)  an Offset PLL (Phase Locked Loop) transmitter  a Frequency synthesizer  a Digitally controlled crystal oscillator (DCXO)  a Tx/Rx FEM (Front-End Module ) for dual-band GSM/GPRS Baseband Functionalities The Baseband is composed of an ARM9, a DSP and an analog element (with audio signals, I/Q signals and ADC).

  • Page 24: Interfaces

    3. Interfaces General Interfaces The WIreless Standard MOdem, 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...

  • Page 25: Power Supply

    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 the peaks, the ripple (U limit (see Table 1 below).

  • Page 26: 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 WISMO218 with a battery, the total impedance (battery + protections + PCB) should be less than 150m. Pin Description...

  • Page 27: Recommended Components

    Recommended Components C1, C2: 10µF +/-20% Component GRM21BR60J106KE19L CM21X5R106M06AT JMK212BJ106MG-T C2012X5R0J106MT 220nH +/-5% Component 0805CS-221XJLC 0805G221J E WA_DEV_W218_PTS_002 Rev 005 Product Technical Specification & Manufacturer MURATA KYOCERA TAYO YUDEN Manufacturer COILCRAFT STETCO Customer Design Guidelines Page 27 of 109...

  • Page 28: Power Consumption

    For this method, the entry of sleep mode is controlled just by the firmware.  When the WISMO218 has had no activities for a certain period of time, it will enter sleep mode automatically, regardless of the DTR level. ...

  • Page 29: Power Consumption

    The power consumption level will vary depending on the operating mode, and it is for this reason that the following consumption values are given for each mode and RF band. The following consumption values were obtained by performing measurements on WISMO218 samples at a temperature of 25° C.

  • Page 30: Consumption Waveform Samples

    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). Three VBATT values are used to measure the power consumption - VBATTmin (3.2V), VBATTmax (4.8V) and VBATTtyp (3.6V).

  • Page 31: Connected Mode Current Waveform

    Product Technical Specification & Customer Design Guidelines Connected Mode Current Waveform TX PEAK Transfer Mode Class 10 Current Waveform TX PEAK WA_DEV_W218_PTS_002 Rev 005 Page 31 of 109...

  • Page 32: Idle Mode Page 2 Current Waveform

    Product Technical Specification & Customer Design Guidelines Idle Mode Page 2 Current Waveform RX PEAK Idle Mode Page 9 Current Waveform RX PEAK WA_DEV_W218_PTS_002 Rev 005 Page 32 of 109...

  • Page 33: Recommendations For Less Consumption

    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. Signal Number GPIO1 GPIO3 GPIO5 GPIO2 is dedicated for WISMO_READY and is not open as GPIO purpose for customer use. GPIO4 is dedicated for TX burst indication and is not open as GPIO purpose for customer use.

  • Page 34: Electrical Information For Digital I/O

    Electrical Information for Digital I/O The I/Os concerned are all interfaces such as GPIOs, SPIs, etc. Parameter Internal 2.8V power supply Input / Output pin Absolute maximum ratings WA_DEV_W218_PTS_002 Rev 005 Product Technical Specification & Table 5. Electrical Characteristics of Digital I/O 2.8 Volts Type (2V8 ) I/O type Minim.

  • Page 35: Spi Bus For Debug Trace Only

    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 WISMO218 is not open for application use other than debug trace.

  • Page 36: Figure 5. Example Of An Spi To Uart2 Interface Conversion Implementation

    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 U103 SC16IS750IPW X101 3, 6864MHz 86SMX surface mount crystal (971-3131) R104, R105 10K...

  • Page 37: Figure 6. Example Of Rs-232 Level Shifter Implementation For Uart2

    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 U200 LTC2804IGN-1 L200 LQH2M CN100K02L J200 096615276119 SUBD9F R202 R204 100K C200 1µF C201 220nF C207 1µF...

  • Page 38: Main Serial Link (Uart)

    Main Serial Link (UART) A flexible 8-wire serial interface is available on the WISMO218 that complies with the V24 protocol signaling, but not with the V28 (electrical interface) due to its 2.8-Volt interface. Features The supported baud rates of the UART are 1200, 2400, 4800, 9600, 19200, 38400, 57600 and 115200 Kbits, with autobauding.

  • Page 39: 5-Wire Serial Interface Hardware Design

     Signal: CT103/TXD*, CT104/RXD*, ~CT105/RTS*, ~CT106/CTS*  The signal ~CT108/DTR* can be looped back to ~CT107/DSR from both the WISMO218 side and from the DTE side.  For detailed configuration, please refer to Figure 9 Example of V24/CMOS Serial Link Implementation for 4-wire UART.

  • Page 40: Application

    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 WISMO218 or by an external regulator at 2.8V. If the UART interface is connected directly to a host processor, it is not necessary to use level shifters.

  • Page 41: V24/Cmos Possible Design

    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 Rev 005 ON/~OFF CT103/TXD CT104/RXD ~CT105/RTS...

  • Page 42: Figure 10. Example Of V24/Cmos Serial Link Implementation For 5-Wire Uart

    The designs shown in Figure 8, Figure 9, and Figure 10 are basic designs. Both the DCD and RI can be left open when not used. However, a more flexible design to access this serial link with all modem signals is shown below. WISMO218 ( DCE ) 2.8Volt...
  • Page 43 Product Technical Specification & Customer Design Guidelines Tip: The 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 44: Sim Interface

    SIM Interface The Subscriber Identification Module can be directly connected to the WISMO218 through this dedicated interface. 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 45: Pin Description

    Parameter SIM-IO V SIM-IO V ~SIM-RST, SIM-CLK Source current = 20µA SIM-IO V Source current = 20µA ~SIM-RST, SIM-IO, SIM- Sink current = -200µA SIM-VCC = 2.9V SIM-VCC Output Voltage SIM-VCC = 1.8V full-power mode SIM-VCC current Sleep mode with 32kHz system clock enabled.

  • Page 46: Application

    SIM Card Reader SIM socket connection Signal Pin Number Note: CC4 and CC8 are not connected as the WISMO218 does not support SIM detect feature. WA_DEV_W218_PTS_002 Rev 005 Product Technical Specification & Figure 12. Example of SIM Socket Implementation Table 11.

  • Page 47: General Purpose Input/Output

    General Purpose Input/Output The 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 48: Analog To Digital Converter

    Analog to Digital Converter One Analog to Digital Converter input is provided by the 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. Features The AUX-ADC0 input can be used for customer applications.

  • Page 49: Analog Audio Interface

    Analog Audio Interface The 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. Microphone Features The microphone, MIC, can either have a single-ended or a differential connection.

  • Page 50: Speaker Features

    The input voltage depends on the input micro gain set by the AT command. Please refer to the document [2], 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 51: Pin Description

    The output voltage depends on the output speaker gain set by the AT command. Please refer to document [2] 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 52: Application

    Product Technical Specification & Customer Design Guidelines Application Microphone The following subsections define different microphone configuration examples. 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.

  • Page 53: Recommended Components

    Figure 16. Example of MIC Input Differential Connection without LC Filter The capacitor C1 is highly recommended to eliminate TDMA noise. Note that C1 must be close to the microphone. Recommended Components Component 12pF to 33pF C2, C3, C4 47pF L1, L2 100nH Microphone Single-Ended Connection Example...

  • Page 54: Figure 17. Example Of Mic Input Single-Ended Connection With Lc Filter

    Figure 17. Example of MIC Input Single-Ended connection with LC Filter *Z2 is from 200Hz to 4kHz. For more characteristics refer to the Electrical Characteristics section. Note that:  Internal input impedance value becomes 1100, due to the connection of the other end to ground.

  • Page 55: Recommended Components

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

  • Page 56: Speaker Spkp And Spkn

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

  • Page 57: Recommended Microphone Characteristics

    It is important to select an appropriate microphone, speaker and filtering components to avoid TDMA noise. Recommended Microphone Characteristics The impedance of the microphone has to be around 2K. Sensitivity is from -40dB to –50 dB. SNR > 50 dB. Frequency response is compatible with the GSM specifications.
  • Page 58 The types of filtering components are:  RF decoupling inductors  RF decoupling capacitors A good “Chip S-Parameter” simulator is proposed by Murata. Refer to http://www.murata.com/products/design_support/mcsil/index.html Using different Murata components, we could see that the value, the package and the current rating can have different decoupling effects.

  • Page 59: Audio Track And Pcb Layout Recommendation

    The table below shows some examples with different Murata components: Package Filtered band GSM900 Value 100nH Types Inductor Position Serial Manufacturer Murata Rated 150mA LQG15HSR10J02 or Reference LQG15HNR10J02 Package Filtered band GSM900 Value 100nH Types Inductor Position Serial Manufacturer Murata Rated 300mA Reference...

  • Page 60: Figure 22. Audio Track Design

    Product Technical Specification & Customer Design Guidelines Figure 22. Audio Track Design For differential connections, it is necessary to add a 2.2KΩ resistor from MICN to GND to have a proper bias of the microphone. Refer to the following figure. Differential Audio line is always in parallel Figure 23.

  • Page 61: 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 WISMO218 module ground as close as possible to the castellation GND pin of WISMO218. It is the same case for SPKP and SPKN.

  • Page 62: Pulse-Width Modulators (Pwms)

    Pulse-Width Modulators (PWMs) The 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. 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 63: 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 005 Page 63 of 109...

  • Page 64: Buzzer Output

    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. Features The signal BUZZER can be used in conjunction with an external transistor/MOSFET for driving a buzzer in order to give a maximum current of 100mA (PEAK) and an average of 40mA, depending on...

  • Page 65: Application

    A low filter is recommended at low frequencies. WA_DEV_W218_PTS_002 Rev 005 Product Technical Specification & VBATT BUZZER Figure 28. Example of Buzzer Implementation max of 100mA and must be adjusted in PEAK Customer Design Guidelines WISMO218 Page 65 of 109...

  • Page 66: Calculations Of The Low Filter

    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 67: On/~Off Signal

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

  • Page 68: Application

    Product Technical Specification & Customer Design Guidelines Application Switch ON/~OFF Figure 30. Example of the ON/~OFF Pin Connection Either By a Switch or Via an Open Collector Transistor Power ON Figure 31. Power-ON Sequence (no PIN code activated) WA_DEV_W218_PTS_002 Rev 005 Page 68 of 109...

  • Page 69: Power Off

    During this phase, any external reset should be avoided. Once the WISMO218 is properly powered ON, the WISMO_READY pin will set to HIGH level to acknowledge the successful powering ON of the WISMO218 before it is ready to operate. The ON/~OFF signal can be left at LOW level until power off.

  • Page 70: Figure 32. Power-Off Sequence

    Product Technical Specification & Customer Design Guidelines Figure 32. Power-OFF Sequence WA_DEV_W218_PTS_002 Rev 005 Page 70 of 109...

  • Page 71: Wismo_Ready Indication

    WISMO_READY Indication This signal indicates the ready status of the 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 the power ON diagram in the Power ON sub-section.

  • Page 72: Vcc_2V8 Output

    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 WISMO218 is switched on. Features Parameter Output voltage VCC_2V8 Output Current Pin Description Signal Pin Number...

  • Page 73: 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 WISMO218 when VBATT is available but a back-up power supply is needed to save date and hour when VBATT is switched off.

  • Page 74: Super Capacitor

    Product Technical Specification & Customer Design Guidelines 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. 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 75: 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 WISMO218. WA_DEV_W218_PTS_002 Rev 005 Page 75 of 109...

  • Page 76: Tx_Ctrl Signal For Tx Burst Indication

    TX_CTRL Signal for TX Burst Indication Features The TX_CTRL signal is a 2.8V indication signal for TX Burst with a 100K pull-up resistor implemented inside the WISMO218 module. WISMO218 State During TX burst No TX During TX burst, there will be higher current drain from the VBATT power supply which causes a voltage drop.

  • Page 77: Pin Description

    Product Technical Specification & Customer Design Guidelines Parameter Condition Minimum Typ. Maximum Unit µs delay Pin Description Table 35. TX_CTRL Signal Pin Descriptions Signal I/O Type Reset State Description Number TX_CTRL TX Burst indication 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 78: Reset

    Reset The WISMO218 has an input ~RESET pin. This is a hardware reset and should only be used for emergency reset. Feature The ~RESET signal has a 100K internal pull up resistor to VCC_2V8. Parameter Input Impedance ( R )*...

  • Page 79: 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 WISMO218) as shown in the figure below. Figure 39. Example of ~RESET Pin Connection with Push Button Configuration...

  • Page 80: Rf Interface

    The impedance is 50 nominal and the DC resistance is 0. RF Connection The RF input/output of the 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 81: Figure 41. Example Of An Rf 50 Line

    GSM terminal. The RF antenna connection uses one of the castellation pins of the WISMO218, with grounded castellation pins at both sides. This castellation pin must be connected to an RF 50 line, in order to protect the antenna line from the noise coming from base-band signals.
  • Page 82 Customer Design Guidelines 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 WISMO218 is ESD protected, for both ±4KV contact and ±8KV air discharge. WA_DEV_W218_PTS_002...

  • Page 83: Consumption Measurement Procedure

    This chapter describes the consumption measurement procedure used to obtain the WISMO218 consumption specification. The 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 84: Figure 42. Typical Hardware Configuration

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

  • Page 85: Wismo218 Development Kit

    WISMO218 Development Kit The WISMO218 Development Kit is used as a basis for the WISMO218 measurement via an adaptor board. The WISMO218 Development Kit can be used to perform consumption measurement using several settings. For the list and corresponding description of the settings, see document [3] WISMO218 Development Kit User Guide and document [1] WISMO218 Hardware Presentation.

  • Page 86: Socket-Up Board Used

    Customer Design Guidelines Socket-Up Board Used There is an adaptor board which is used to adapt the WISMO218 to work on the WISMO218 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 87: Software Configurations

    This section discusses the software configuration for the equipment(s) used and the WISMO218 settings. WISMO218 Configuration The 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] WISMO218 AT Commands Manual.

  • Page 88: Equipment Configuration

    Equipment Configuration The communication tester is set according to the 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 89: Template

    Transfer Mode class 10 (3Rx/2Tx) 1800 MHz WA_DEV_W218_PTS_002 Rev 005 Table 42. WISMO218 Power Consumption WISMO218 Power Consumption average VBATT=4.8V PCL5 (TX power 33dBm) PCL19 (TX power 5dBm) PCL0 (TX power 30dBm) PCL15 (TX power 0dBm) Gam.3 (TX power 33dBm) Gam.17 (TX power 5dBm)

  • Page 90: Wa_Dev_W218_Pts_002 Rev

    Product Technical Specification & Customer Design Guidelines 5. Technical Specifications Castellation Connector Pin Configuration Figure 43. WISMO218 Pin Configuration WA_DEV_W218_PTS_002 Rev 005 Page 90 of 109...

  • Page 91: Castellation Pin

    Castellation Pin 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 WISMO_READY 2.8V WISMO Ready SIM-VCC SIM power supply SIM-CLK...
  • Page 92 Product Technical Specification & Customer Design Guidelines * 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. WA_DEV_W218_PTS_002 Rev 005 Page 92 of 109...

  • Page 93: Recommended Connection When Not Used

    Recommended Connection When Not Used The table below gives the recommended connection for any unused pins. Recommended Signal Connection when SPKP open SPKN open MICP open MICN open AUX_ADC0 Ground BAT-RTC open WISMO_READY open SIM-VCC SIM power supply SIM-CLK SIM clock SIM-IO SIM data ~SIM-RST...

  • Page 94: 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 WISMO218. A 4-layer through-hole type PCB structure can be used. Figure 44. PCB Structure Example for the Application Board...

  • Page 95: Environmental Specifications

    The WISMO218 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 WISMO218 to connect to the cellular network and be fully functional, as it does within the Class A range.

  • Page 96: Figure 45. Environmental Classes

    WISMO218 TYPE OF TEST STANDARDS Cold IEC 68-2.1 Ab test Dry heat IEC 68-2.2 Bb test Change of temperature IEC 68-2.14 Na/Nb test Damp heat IEC 68-2.30 cyclic Db test Damp heat IEC 68-2.56 Cb test Sinusoidal vibration IEC 68-2.6...

  • Page 97: Mechanical Specifications

    Mechanical Specifications Physical Characteristics The 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 005 Product Technical Specification & Customer Design Guidelines Page 97 of 109...

  • Page 98: Wismo218 Dimensions

    Product Technical Specification & Customer Design Guidelines WISMO218 Dimensions Figure 46. Castellation Pin Dimension and Location WA_DEV_W218_PTS_002 Rev 005 Page 98 of 109...

  • Page 99: Figure 47. Wismo218 Dimensions

    Product Technical Specification & Customer Design Guidelines Figure 47. WISMO218 Dimensions WA_DEV_W218_PTS_002 Rev 005 Page 99 of 109...

  • Page 100: Recommended Pcb Landing Pattern

    Product Technical Specification & Customer Design Guidelines Recommended PCB Landing Pattern Refer to document [4] Customer Process Guideline for WISMO Series. WA_DEV_W218_PTS_002 Rev 005 Page 100 of 109...

  • Page 101: Peripheral Devices References

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

  • Page 102: Gsm Antenna

     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/ ) WA_DEV_W218_PTS_002 Rev 005 Product Technical Specification & Customer Design Guidelines Page 102 of 109...

  • Page 103: Noises And Design

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

  • Page 104: Appendix

    8. 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) GSM 02.60 V8.1.0 (1999-07) GSM 03.60 V7.9.0 (2002-09) 3GPP TS 43.064 V5.0.0 (2002-04) 3GPP TS 03.22 V8.7.0 (2002-08) 3GPP TS 03.40 V7.5.0 (2001-12) 3GPP TS 03.41 V7.4.0 (2000-09)
  • Page 105 ETS 300 641 (1998-03) GCF-CC V3.7.1 (2002-08) The WISMO218 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.
  • Page 106 Product Technical Specification & Customer Design Guidelines Note that when installed in portable devices, the RF exposure condition requires a separate mandatory equipment authorization for the final device. WA_DEV_W218_PTS_002 Rev 005 Page 106 of 109...

  • Page 107: Safety Recommendations (For Information Only)

    Product Technical Specification & Customer Design Guidelines Safety Recommendations (for Information Only) For the efficient and safe operation of your GSM application based on the WISMO218, 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.

  • Page 108: General Safety

    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. WA_DEV_W218_PTS_002 Rev 005 Product Technical Specification &...

  • Page 109: Potentially Explosive Atmospheres

    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 «...

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