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Sierra Wireless WISMO228 Product Technical Specification & Customer Design Manuallines

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

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  • Page 1 Product Technical Specification &   Customer Design Guidelines WISMO228 WIreless Standard MOdem WA_DEV_W228_PTS_002 August 26, 2009...
  • Page 2 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. ...
  • Page 3 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.  ,  , ...
  • Page 4 Product Technical Specification & Customer Design Guidelines Contact Information Phone: 1-604-232-1488 Hours: 8:00 AM to 5:00 PM Pacific Time Sales Desk: E-mail: sales@sierrawireless.com Sierra Wireless 13811 Wireless Way Post: Richmond, BC Canada V6V 3A4 Fax: 1-604-231-1109 Web: www.sierrawireless.com Consult our website for up-to-date product descriptions, documentation, application notes, firmware  upgrades, troubleshooting tips, and press releases:  ...

  • Page 5: Table Of Contents

    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 ......................
  • Page 6 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 ........................
  • Page 7 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 WA_DEV_W228_PTS_002 Rev 001 Page 7 of 108...
  • Page 8 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 ............................

  • Page 9: List Of Figures

    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.
  • Page 10 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 WA_DEV_W228_PTS_002 Rev 001 Page 10 of 108...
  • Page 11 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.
  • Page 12 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 WA_DEV_W228_PTS_002 Rev 001 Page 12 of 108...
  • Page 13 Product Technical Specification & Customer Design Guidelines 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 Alternative Current Analog to Digital Converter Analog to Digital conversion Audio-Frequency Automatic Gain Control ATtention (prefix for modem commands)
  • Page 14 Product Technical Specification & Customer Design Guidelines Abbreviation Definition Cell Broadcast Cell Broadcast Service Circular Error Probable CLocK CMOS Complementary Metal Oxide Semiconductor CODEC COder DECoder Central Processing Unit Coding Scheme Circuit Switched Data Clear To Send Digital to Analog Converter Digital Audio Interface Decibel Direct Current...
  • Page 15 Product Technical Specification & Customer Design Guidelines Abbreviation Definition Enhanced Message Service ENable ElectroStatic Discharges ETSI European Telecommunications Standards Institute FIFO First In First Out Full Rate Full Type Approval GrouND General Purpose Input General Purpose Connector GPIO General Purpose Input Output General Purpose Output GPRS General Packet Radio Service...
  • Page 16 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 Négative Temperature Coefficient Power Amplifier Pascal (for speaker sound pressure measurements) PBCCH Packet Broadcast Control CHannel Personal Computer...
  • Page 17 Product Technical Specification & Customer Design Guidelines Abbreviation Definition Random Access Memory Radio Frequency Radio Frequency Interference RHCP Right Hand Circular Polarization Ring Indicator Root Mean Square ReSeT Real Time Clock RTCM Radio Technical Commission for Maritime services Request To Send Receive Serial CLock Serial DAta...
  • Page 18 Product Technical Specification & Customer Design Guidelines Abbreviation Definition Transient Voltage Suppressor Transmit TYPical UART Universal Asynchronous Receiver-Transmitter µ-blox proprietary protocol (NE DOIT PAS APPARAITRE) Universal Serial Bus USSD Unstructured Supplementary Services Data VSWR Voltage Standing Wave Ratio Wireless Application Protocol  ...

  • Page 19: General Description

    Product Technical Specification & Customer Design Guidelines 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 ...

  • Page 20: Interfaces

    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  WA_DEV_W228_PTS_002 Rev 001 Page 20 of 108...

  • Page 21: Functional Description

    Product Technical Specification & Customer Design Guidelines Functional Description The global architecture of the WISMO228 is shown in the figure below.    Figure 1. Functional Architecture RF Functionalities The Radio Frequency (RF) range complies with the Phase II GSM 850/EGSM 900/DCS 1800/PCS 1900  recommendation. The frequency range for the transmit band and receive band are listed in the table  below.  Table 1. Frequency Range for Tx and Rx Transmit Band (Tx) Receive Band (Rx) GSM 850 824 to 849 MHz...

  • Page 22: Baseband Functionalities

    E-GSM 900 880 to 915 MHz 925 to 960 MHz DCS 1800 1710 to 1785 MHz 1805 to 1880 MHz PCS 1900 1850 to 1910 MHz 1930 to 1990 MHz The RF part of the WISMO228 is based on a specific dual band chip which includes:  • a Digital low‐IF receiver  • a dual‐band LNA (Low Noise Amplifier)  • an Offset PLL (Phase Locked Loop) transmitter  • a Frequency synthesizer  •...

  • Page 23: Interfaces

    Product Technical Specification & Customer Design Guidelines Interfaces General Interfaces The WISMO228 has a 46‐pin castellation connection, which provides access to all available  interfaces. The following table enumerates the available interfaces on the WISMO228.  WA_DEV_W228_PTS_002 Rev 001 Page 23 of 108...
  • Page 24 Product Technical Specification & Customer Design Guidelines Table 2. WISMO228 Interfaces Driven by Available Interface commands WA_DEV_W228_PTS_002 Rev 001 Page 24 of 108...
  • Page 25 Product Technical Specification & Customer Design Guidelines Driven by Available Interface commands SPI Bus for Debug Trace ONLY The WISMO228 provides one SPI bus through the castellation pin.  Caution: This interface is only used for monitoring trace for debug purposes. Pin Description The following table provides the pin description of the SPI bus.  Table 3. SPI Bus Pin Description...
  • Page 26 Product Technical Specification & Customer Design Guidelines Driven by Available Interface commands SIM Interface Error! Reference source not found. Error! Reference source not found. Serial Interface (SPI) Analog to Digital Converter Pulse-Width Modulators (PWMs) ON/~OFF PWM2 for Buzzer Output Module Ready Indication VBAT_RTC (Backup Battery) TX Burst Indication Signal Error! Reference source not found.

  • Page 27: Power Supply

    Product Technical Specification & Customer Design Guidelines Power Supply Power Supply Description The power supply is one of the key elements in the design of a GSM terminal. Due to the burst  emission in GSM/GPRS, the power supply must be able to deliver high current peaks in a short time.  During these peaks, the ripple (U ) on the supply voltage must not exceed a certain limit. Refer to  ripple Table 4 Input Power Supply Voltage for the input power supply voltage values.  Listed below are the corresponding radio burst rates for the different GPRS classes in  communication mode.  • A GSM/GPRS class 2 terminal emits 577μs radio bursts every 4.615ms. (See Figure 5 Power  Supply During Burst Emission.)  • A GPRS class 10 terminal emits 1154μs radio bursts every 4.615ms.  VBATT provides for the following functions:   • Directly  supplies  the  RF  components  with  3.6V.  It  is  essential  to  keep  a  minimum  voltage  ripple at this connection in order to avoid any phase error. ...

  • Page 28: Electrical Characteristics

    This value has to be guaranteed during the burst (with TBDA Peak in GSM or GPRS mode) The maximum operating Voltage Stationary Wave Ratio (VSWR) is 1.5:1. Note: When powering the WISMO228 with a battery, the total impedance (battery + protections + PCB) Ω should be less than 150m Pin Description Table 5.
  • Page 29 Product Technical Specification & Customer Design Guidelines C1, C2:   10μF +/‐20%  Component Manufacturer GRM21BR60J106KE19L MURATA CM21X5R106M06AT KYOCERA JMK212BJ106MG-T TAYO YUDEN C2012X5R0J106MT   L1:    220nH +/‐5%   Component Manufacturer 0805CS-221XJLC COILCRAFT 0805G221J E STETCO WA_DEV_W228_PTS_002 Rev 001 Page 29 of 108...

  • Page 30: Power Consumption

    Table 6. WISMO228 Operating Modes Mode Description When VBATT power is supplied to the WISMO228 but it has not yet been powered OFF Mode When alarm clock is set for the WISMO228 with ALL of the following conditions: • before time is up Alarm Mode •...

  • Page 31: Power Consumption Values

    Product Technical Specification & Customer Design Guidelines When the WISMO228 has had no activities for a certain period of time, it will enter  sleep mode automatically, regardless of the DTR level.  Any ASCII character on the UART can wake the WISMO228 up.  Refer to the WISMO218 AT Commands Manual for more information about the AT+PSSLEEP  command.  Power Consumption Values Three VBATT values were used to measure the power consumption of the WISMO228: VBATTmin  (3.2V), VBATTmax (4.8V) and VBATTtyp (3.6V). Both the average current and the maximum current  peaks were also measured for all three VBATT values.  The following consumption values were obtained by performing measurements on WISMO228  samples at a temperature of 25° C with the assumption of a 50Ω RF output.  Note: Power consumption performance is software related. The results listed below are based on the software version TBD. WA_DEV_W228_PTS_002 Rev 001...

  • Page 32: Wismo228 Power Consumption

    Product Technical Specification & Customer Design Guidelines Table 7. WISMO228 Power Consumption WISMO228 Power Consumption Operating Mode Parameters peak Unit M AX M AX average average average VBATT=4.8V VBATT=3.6V VBATT=3.2 Off Mode* µA Alarm Mode µA Idle Mode** Paging 2 (Rx burst occurrence ~0.5s)
  • Page 33 Product Technical Specification & Customer Design Guidelines Gam.18 (TX mA  power 0dBm) Gam.3 (TX power 30dBm) 1900 MHz Gam.18 (TX mA  power 0dBm) Gam.3 (TX power 33dBm) 850 MHz Gam.17 (TX mA  power 5dBm) Gam.3 (TX power 33dBm) 900 MHz Gam.17 (TX mA ...

  • Page 34: Consumption Waveform Samples

    Product Technical Specification & Customer Design Guidelines Consumption Measurement Procedure for more information regarding consumption measurement  procedures.  Consumption Waveform Samples The consumption waveforms presented below have a typical VBATT voltage of 3.6V and are for an  EGSM900 network configuration.  Four significant operating mode consumption waveforms are shown in the following subsections,  namely:  • Connected Mode (PCL5: Tx power 33dBm)  • Transfer mode (GPRS class 10, gam.3: Tx power 33dBm )  • Idle mode (Paging 2)  • Idle mode (Paging 9)  Note: The following diagrams only show the waveform of the current, and not the exact values. Connected Mode Current Waveform TX PEAK  ...

  • Page 35: Transfer Mode Class 10 Current Waveform

    Product Technical Specification & Customer Design Guidelines Transfer Mode Class 10 Current Waveform TX PEAK   Idle Mode Page 2 Current Waveform RX PEAK   WA_DEV_W228_PTS_002 Rev 001 Page 35 of 108...

  • Page 36: Idle Mode Page 9 Current Waveform

    Product Technical Specification & Customer Design Guidelines Idle Mode Page 9 Current Waveform RX PEAK   Recommendations for Less Consumption For better power consumption, in particular for the quiescent current, it is recommended to drive  the GPIOs as shown in the table below.  Table 8. Consumption/Software Driver Recommendations Recommended SW Driver (Logic Pin # Signal I/O Type Reset State Level Output State) GPIO3 Pull up Input: 0...

  • Page 37: Electrical Information For Digital I/O

    Product Technical Specification & Customer Design Guidelines Electrical Information for Digital I/O The following table describes the electrical characteristics of the digital I/Os (interfaces such as  GPIO, SPI, etc.) available on the WISMO228.   Table 9. Electrical Characteristics of Digital I/Os 2.8Volt Type (2V8) Parameter Conditions I/O Type Minimum Typical Maximum Internal 2.8V power supply VCC_2V8 2.7V 2.8V 2.95V CMOS -0.4V*...

  • Page 38: Spi Bus For Debug Trace Only

    Product Technical Specification & Customer Design Guidelines SPI Bus for Debug Trace ONLY The WISMO228 provides one SPI bus through the castellation pin.  Caution: This interface is only used for monitoring trace for debug purposes. Pin Description The following table provides the pin description of the SPI bus.  Table 10. SPI Bus Pin Description Pin # Signal I/O Type...
  • Page 39 Product Technical Specification & Customer Design Guidelines   Figure 8. Example of an SPI to UART2 Interface Conversion Implementation   The following table lists the recommended components to use in implementing the SPI to UART2  interface.  Component Description/Details Manufacturer U103 SC16IS750IPW NXP Semiconductors 3, 6864MHz 86SMX surface mount crystal (971- X101 Farnell 3131) R104, R105 10KΩ...
  • Page 40 Product Technical Specification & Customer Design Guidelines   Figure 9. Example of an RS-232 Level Shifter Implementation for UART2   The following table lists the recommended components to use in implementing a UART transceiver  circuitry.  Component Description/Details Manufacturer U200 LTC2804IGN-1 LINEAR TECHNOLOGY L200 LQH2M CN100K02L MURATA J200 096615276119 SUBD9F HARTING R202 R204 100KΩ C200 1µF C201...

  • Page 41: Pin Description

    Note: The rising time and falling time of the reception signals (mainly CT103/TXD) have to be less than 300ns. The WISMO228 is designed to operate using all the serial interface signals and it is recommended to WA_DEV_W228_PTS_002 Rev 001 Page 41 of 108...

  • Page 42: 5-Wire Serial Interface Hardware Design

    CT103/TXD  • CT104/RXD  • ~CT105/RTS  • ~CT106/CTS    The signal ~CT108/DTR can be looped back to ~CT107/DSR from both the WISMO228 side and from  the DTE side.  For a detailed configuration, refer to Figure 12 Example of V24/CMOS Serial Link Implementation  for a 4‐wire UART.  Note: All signals are specified according to PC (DTE) view. 2-wire Serial Interface Hardware Design Note: Although this case is possible for a connected external chip, it is not recommended.
  • Page 43 Signals ~CT105/RTS and ~CT106/CTS are not used in this configuration. Configure the AT command  AT+IFC=0,0 to disable the flow control function on the WISMO228. Refer to the WISMO218 AT  Commands Manual for more information about configuring AT commands.  Also,  • The signal ~CT108/DTR can be looped back to ~CT107/DSR from both the WISMO228 side  and from the DTE side.  • The  signal  ~CT105/RTS  can  be  looped  back  to  ~CT106/CTS  from  both  the  WISMO228  side  and from the DTE side.  • The flow control mechanism has to be managed from the customer side.  For a detailed configuration, refer to Figure 11 Example of V24/CMOS Serial Link Implementation  for a 2‐wire UART.  The loop back connection of ~CT108/DTR to ~CT107/DSR is not allowed when AT+PSSLEEP=0 is used, for which sleep mode entry is ~CT108/DTR level dependent.
  • Page 44 Product Technical Specification & Customer Design Guidelines Power Consumption. In order to go to sleep mode properly under this instead. For more details, refer to the discussion about AT + PSSLEEP = 1 in section 0 WA_DEV_W228_PTS_002 Rev 001 Page 44 of 108...

  • Page 45: Application

    Note: Power Consumption. Application The level shifter must be a V28 electrical signal compliant with 2.8V.      Figure 10. Example of RS-232 Level Shifter Implementation for UART Note: The U1 chip also protects the WISMO228 against ESD (air discharge) at 15KV. The following table lists the recommended components to use in implementing a level shifter  UART.  Component Description/Details Manufacturer R1, R2 15KΩ C1, C2, C3, C4, C5 1µF...

  • Page 46: V24/Cmos Possible Design

    Product Technical Specification & Customer Design Guidelines It is not necessary to use level shifters when the UART interface is directly connected to a host  processor. Refer to the following sections for steps on how to connect the interface using other  design implementations.  V24/CMOS Possible Design   Figure 11. Example of V24/CMOS Serial Link Implementation for a 2-wire UART   Figure 12. Example of V24/CMOS Serial Link Implementation for a 4-wire UART WA_DEV_W228_PTS_002 Rev 001 Page 46 of 108...

  • Page 47: Example Of V24/Cmos Serial Link Implementation For A 5-Wire Uart

    An internal 10KΩ pull‐up resistor is connected on both RI and DCD to set the signals to HIGH level  during the Reset state.  The UART interface is a 2.8V type, but it is 3V tolerant.  Note: The WISMO228 UART is designed to operate using all the serial interface signals. In particular, it is recommended to use ~CT105/RTS and ~CT106/CTS for hardware flow control in order to avoid data corruption during transmission. WA_DEV_W228_PTS_002...

  • Page 48: Sim Interface

    Product Technical Specification & Customer Design Guidelines SIM Interface The Subscriber Identification Module can be directly connected to the WISMO228 through this  dedicated interface.  This interface controls both 1.8V and 3V SIM cards and is fully compliant with GSM 11.11  recommendations concerning SIM functions.  The SIM uses four signals, namely:  • SIM‐VCC: SIM power supply  • ~SIM‐RST: reset  • SIM‐CLK: clock  • SIM‐IO: I/O port    It is recommended to add Transient Voltage Suppressor (TVS) diodes on the signals connected to  the SIM socket in order to prevent any Electrostatic Discharge. TVS diodes with low capacitance  (less than 10pF) have to be connected on the SIM‐CLK and SIM‐IO signals to avoid any disturbance  from the rising and falling edge of the signals. TVS diodes are mandatory for the Full Type  Approval and they must be placed as close to the SIM socket as possible.  The recommended low capacitance diode array to use is the DALC208SC6 from ST Microelectronics.  Electrical Characteristics The following table describes the electrical characteristics of the SIM interface.  Table 12. Electrical Characteristics of the SIM Interface...

  • Page 49: Pin Description

    Product Technical Specification & Customer Design Guidelines Parameters Conditions Minimum Typical Maximum Unit SIM-VCC = 1.8V 1.65 1.95 full-power mode SIM-VCC current Sleep mode with 32kHz system clock enabled. Loaded with 30pF and ESD SIM-CLK Rise/Fall Time protection diode ~SIM-RST, Rise/Fall Loaded with 30pF and ESD Time protection diode...

  • Page 50: Application

    Product Technical Specification & Customer Design Guidelines Application   Figure 15. Example of a SIM Socket Implementation The following table lists the recommended components to use in implementing the SIM socket.  Component Description/Details Manufacturer C400 100nF D400 ESDA6V1SC6 D401 DALC208SC6 SGS-THOMSON ITT CANNON CCM03 series (Refer to the SIM Card Reader sub-section of J400 CANNON section 1 Error! Not a valid result for table.
  • Page 51 Customer Design Guidelines Pin # Signal Description SIM-CLK Not connected GROUND Not connected SIM-IO Not connected Note: CC4 and CC8 are not connected as the WISMO228 does not support the SIM detect feature. WA_DEV_W228_PTS_002 Rev 001 Page 51 of 108...

  • Page 52: General Purpose Input/Output

    Product Technical Specification & Customer Design Guidelines General Purpose Input/Output The WISMO228 provides up to three General Purpose I/Os. They are used to control any external  device such as an LCD or a Keyboard backlight.  These GPIOs offer the possibility to read the pin state whatever their direction may be.  Pin Description The following table provides the pin description of the GPIOs.  Table 15. GPIO Pin Descriptions Pin # Signal I/O Type Reset State GPIO3 Pull up GPIO5 Pull down GPIO1 Pull up When GPIO5 is used as a general purpose output, it is necessary to have an external pull up resistor  connected to a 2.8V source. The resistance value will depend on the current drain required by the  application. ...

  • Page 53: Analog To Digital Converter

    Product Technical Specification & Customer Design Guidelines Analog to Digital Converter One Analog to Digital Converter input, AUX‐ADC0, is provided by the WISMO228 for customer  applications. It is a 10‐bit resolution converter, ranging from either 0 to 1V or 0 to 3V, depending on  the general purpose input mode.  Electrical Characteristics The following table describes the electrical characteristics of the ADC interface.  Table 16. Electrical Characteristics of the ADC Interface Parameters Minimum Typical Maximum Unit Resolution bits Sampling frequency 1 general purpose input Input signal range...

  • Page 54: Analog Audio Interface

    Product Technical Specification & Customer Design Guidelines Analog Audio Interface The WISMO228 supports one microphone input and one speaker output. It also includes an echo  cancellation feature which allows hands free function.  In some cases, ESD protection must be added on the audio interface lines.  Microphone Features The microphone, MIC, can have either a single‐ended or a differential connection. However, it is  strongly recommended to use a differential connection instead of a single‐ended connection in order  to reject common mode noise and TDMA noise.    When using a single‐ended connection, be sure to have a very good ground plane, very good  filtering as well as shielding in order to avoid any disturbance on the audio path.  The gain of MIC inputs is internally adjusted and can be tuned using AT commands.  The MIC interface already includes suitable biasing for an electret microphone. The electret  microphone can be connected directly on the inputs for easy connection.  AC coupling is also already embedded in the WISMO228.      Figure 16. DC Equivalent Circuit of MIC   Figure 17. AC Equivalent Circuit of MIC...

  • Page 55: Electrical Characteristics

    Product Technical Specification & Customer Design Guidelines Electrical Characteristics The following table describes the electrical characteristics of the audio interface, MIC.  Table 18. Electrical Characteristics of MIC Parameters Minimum Typical Maximum Unit MICP MICN without 2.2KΩ to GND Internal biasing MICN with 2.2KΩ to GND DC Characteristics Output current KΩ Z2 MICP (MICN=Open) Z2 MICN (MICP=Open) Z2 MICP (MICN=GND) Z2 MICN (MICP=GND)

  • Page 56: Speaker Features

    Product Technical Specification & Customer Design Guidelines Speaker Features The speaker, SPK, can either have a single‐ended or a differential connection. However, it is strongly  recommended to use a differential connection instead of a single‐ended connection in order to reject  common mode noise and TDMA noise. Moreover, in a single‐ended connection, half (½) of the  power is lost.     Figure 18. Equivalent Circuit of SPK Table 19. Speaker Details Parameters Typical Unit Connection Ω Z (SPKP, SPKN) 16 or 32 Differential Ω Z (SPKP, SPKN) Single-ended  ...

  • Page 57: Pin Description

    Product Technical Specification & Customer Design Guidelines Parameters Minimum Typical Maximum Unit voltage RL=8Ω: AT+VGR=6*; differential RL=16Ω or 32Ω: AT+VGR=6*; single ended RL=16Ω or 32Ω: AT+VGR=6*; differential Ω Load resistance IOUT Output current; peak value; RL=8Ω POUT RL=8Ω; AT+VGR=10*; The output voltage depends on the output speaker gain set by the AT command. Refer to the WISMO218 AT Commands Manual for more information about configuring AT commands.

  • Page 58: Example Of A Differential Mic Connection With An Lc Filter

    Product Technical Specification & Customer Design Guidelines   Figure 19. Example of a Differential MIC Connection with an LC Filter   Audio quality can be very good without L1, L2, C2, C3 and C4 depending on the design. But if there  is EMI perturbation, this filter can reduce the TDMA noise. This filter (L1, L2, C2, C3 and C4) is not  mandatory, and if not used, the capacitor must be removed and the coil replaced by a 0Ω resistor as  shown in the following schematic.      Figure 20. Example of a Differential MIC Connection without an LC Filter   The capacitor C1 is highly recommended to eliminate TDMA noise and must be close to the ...

  • Page 59: Example Of A Single-Ended Mic Connection With An Lc Filter

    Product Technical Specification & Customer Design Guidelines Component Description/Details Notes 12pF to 33pF needs to be tuned depending on the design C2, C3, C4 47pF needs to be tuned depending on the design L1, L2 100nH needs to be tuned depending on the design Single-Ended Connection When single‐ended connection is used for MIC, MICN is just left open. ...

  • Page 60: Speaker Spkp Ad Spkn

    Product Technical Specification & Customer Design Guidelines   Figure 22. Example of a Single-Ended MIC Connection without an LC Filter Note: *Z2 is from 200Hz to 4kHz. For more details, refer to Table 18 Electrical Characteristics of MIC. The capacitor C1 is highly recommended to eliminate TDMA noise and must be close to the  microphone.  The following table lists the recommended components to use in implementing a single‐ended MIC ...

  • Page 61: Design Recommendations

    Note: 4.7µF < C1 < 47 µF (Depending on speaker characteristics and output power.)  When using a single‐ended connection, bear in mind that:  • Using  a  single‐ended  connection  includes  losing  output  power  (‐6dB)  as  compared  to  a  differential connection.  • The connection between the WISMO228 pins and the speaker must be designed to keep the  serial impedance lower than 1.5Ω.  Design Recommendations General When both speaker and microphone are exposed to the external environment, it is recommended to  add ESD protection as close to the speaker or microphone as possible, connected between the audio  lines and a good ground.  When using the single‐ended connection of MICP, ensure to have a good ground plane, good ...

  • Page 62: Recommended Microphone Characteristics

    Product Technical Specification & Customer Design Guidelines Recommended Microphone Characteristics • The impedance of the microphone has to be around 2KΩ  • Sensitivity is from ‐40dB to ‐50dB  • SNR > 50dB  • Frequency response is compatible with GSM specifications    To suppress TDMA noise, it is highly recommended to use microphones with two internal  decoupling capacitors:  • CM1=56pF  (0402  package)  for  the  TDMA  noise  coming  from  the  demodulation  of  the  GSM850/EGSM900 frequency signals  • CM2=15pF  (0402  package)  for  the  TDMA  noise  coming  from  the  demodulation  of  the  DCS1800/PCS1900 frequency signals ...

  • Page 63: Audio Track And Pcb Layout Recommendation

    Product Technical Specification & Customer Design Guidelines The types of filtering components are:  • RF decoupling inductors  • RF decoupling capacitors    A good “Chip S‐Parameter” simulator is available from Murata. Refer to  http://www.murata.com/products/design_support/mcsil/index.html for more details.   Using different Murata components, it can be seen that different packages (with different values and  ratings) can have different coupling effects. Refer to the following table for examples using different  Murata components.  Package 0402 Filtered band GSM900 GSM850/900 DCS/PCS Value 100nH 56pF 15pF Types Inductor Capacitor Capacitor Position Serial Shunt Shunt Manufacturer Murata Murata Murata Rated 150mA...

  • Page 64: Differential Audio Connection

    Product Technical Specification & Customer Design Guidelines   Figure 26. Audio Track Design For differential connections, it is necessary to add a 2.2KΩ resistor from MICN to GND to have a  proper bias of the microphone.  Differential Audio line is always in parallel   Figure 27. Differential Audio Connection For single‐ended connections, the negative pole of the microphone, MICN, should be connected to  GND.   WA_DEV_W228_PTS_002 Rev 001 Page 64 of 108...
  • Page 65 PCB layout. This audio ground, together with the MICP signal, should act as the differential line pair. And this audio ground should only be connected to the WISMO228 module ground as close as possible to the castellation GND pin of the WISMO228.

  • Page 66: Pulse-Width Modulators (Pwms)

    Product Technical Specification & Customer Design Guidelines Pulse-Width Modulators (PWMs) The WISMO228 contains two Pulse‐Width Modulators (PWMs) that can be used in conjunction with  an external transistor for driving a vibrator, or a backlight LED. Each PWM uses two 7‐bit unsigned  binary numbers: one for the output period and one for the pulse width or the duty cycle.  The relative timing for the PWM output is shown in the figure below.      Figure 29. Relative Timing for the PWM Output Electrical Characteristics The following table describes the electrical characteristics of the PWM interface.  Table 22. Electrical Characteristics of the PWM Interface Parameters Conditions Minimum Typical Maximum...

  • Page 67: Application

    Product Technical Specification & Customer Design Guidelines Pin # Signal I/O Type Description PWM0 PWM output Application Both the PWM0 and PWM1 signals can be used in conjunction with an external transistor for driving  a vibrator, or a backlight LED.    Figure 30. Example of an LED Driven by the PWM0 or PWM1 Output   The value of R607can be harmonized depending on the LED (D605) characteristics.  The recommended digital transistor to use for T601 is the DTC144EE from ROHM.  WA_DEV_W228_PTS_002 Rev 001 Page 67 of 108...

  • Page 68: Buzzer Output

    Product Technical Specification & Customer Design Guidelines BUZZER Output The BUZZER signal can be used in conjunction with an external transistor/MOSFET for driving a  buzzer in order to give a maximum current of 100mA (PEAK) and an average of 40mA, depending  on application requirement.  It outputs a square wave at the desired tone frequency. The tone frequencies are programmable and  can be re‐programmed on‐the‐fly to generate monophonic audio ringtones or alert tones.  The tone  level can also be adjusted in 4dB steps, or muted.      Figure 31. BUZZER Output Electrical Characteristics The following table describes the electrical characteristics of the BUZZER signal.  Table 24. Electrical Characteristics of the BUZZER Signal Parameters Conditions Minimum Typical Maximum Unit High impedance load 2.85 Load with IoH = 4mA IPEAK...

  • Page 69: Pin Description

    Product Technical Specification & Customer Design Guidelines Pin Description The following table provides the pin description of the BUZZER signal.  Table 25. BUZZER Pin Description Pin # Signal I/O Type Description BUZZER 2.8V Buzzer output Application The maximum peak current of the transistor/MOSFET is 100mA and the maximum average current  is 40mA, while the peak current of the BUZZER pin should be less than 4mA. A transient voltage  suppressor diode must be added as shown below.       Figure 32. Example of a BUZZER Implementation   Where:  •...

  • Page 70: Low Filter Calculations

    Product Technical Specification & Customer Design Guidelines • T1 = FDN335N (for example)  • R2 = 0Ω  • R3 = 1MΩ  Note: A low filter is recommended at low frequencies. Low Filter Calculations To compute for the cut‐off frequency, use the formula Fc = 1/(2*Π*Req*C1) where:  • Fc = cut‐off frequency  • Req = the total resistors in line  • C1 = the capacitive charge on T1 and the ground    Bear in mind that:  • Fc must be higher than FBUZZ‐OUT  • Fc must be at least 64 * FBUZZ‐OUT  Note: The frequency modulation of the BUZZER signal is 64*FBUZZ-OUT. Recommended Characteristics •...

  • Page 71: Example Of An Led Driven By The Buzzer Output

    Product Technical Specification & Customer Design Guidelines   Figure 33. Example of an LED Driven by the BUZZER Output The value of R607 can be harmonized depending on the LED (D605) characteristics.  The recommended digital transistor to use for T601 is the DTC144EE from ROHM. WA_DEV_W228_PTS_002 Rev 001 Page 71 of 108...

  • Page 72: On/~Off Signal

    VBATT supply to the WISMO228, this 3.0V supply regulator will be enabled and so the ON/~OFF  signal is by default at HIGH level.  A LOW level signal has to be provided on the ON/~OFF pin to switch the WISMO228 ON.    Caution: All external signals must be inactive when the WISMO228 is OFF to avoid any damage when starting and to allow the WISMO228 to start and stop correctly. Electrical Characteristics The following table describes the electrical characteristics of the ON/~OFF signal.  Table 26. Electrical Characteristics of the ON/~OFF Signal...

  • Page 73: Application

    Product Technical Specification & Customer Design Guidelines Application   Figure 34. Example of the ON/~OFF Pin Connection Power ON   Figure 35. Power-ON Sequence Table 28. Power-ON Sequence Minimum (s) Typical (s) Maximum (s) ready The ON/~OFF signal level is detected about 250ms after VBATT is available.   Note: This timing might be temperature dependant. WA_DEV_W228_PTS_002 Rev 001 Page 73 of 108...

  • Page 74: Power Off

    Product Technical Specification & Customer Design Guidelines The voltage of this signal has to be pulled LOW for at least 685ms for powering ON. Within this  685ms, the WISMO_READY signal will initially set to HIGH for about 135ms and then resume to  LOW.  During the power ON sequence, an internal reset is automatically performed for 38ms (typically).  During this phase, any external reset should be avoided.  Once the WISMO228 is properly powered ON, the WISMO_READY pin will set to HIGH level to  acknowledge the successful powering ON of the WISMO228 before it is ready to operate. The  ON/~OFF signal can be left at LOW level until power off.  The recommended way to release the ON/~OFF signal is to detect the WISMO_READY signal  within 685ms of powering ON while the level pulse of the ON/~OFF signal is set to LOW, and wait  until the WISMO_READY signal goes HIGH again.  Power OFF The WISMO228 can be powered off by either software or hardware. Refer to the following diagram  for the power OFF sequence.      Figure 36. Power-OFF Sequence WA_DEV_W228_PTS_002 Rev 001 Page 74 of 108...
  • Page 75 Product Technical Specification & Customer Design Guidelines Software Power OFF The AT command AT+CPOF is used to power OFF the WISMO228.  Note: If the ON/~OFF pin is maintained at LOW level when AT+CPOF is used, the module cannot be switched OFF. Hardware Power OFF A LOW level pulse is applied on the ON/~OFF pin for TBC seconds. AT+CPOF will then be  automatically sent to the WISMO228.  Once the WISMO228 receives the AT+CPOF command, the WISMO228 will be unregistered from  the network. The WISMO_READY pin will become LOW to indicate that AT commands are no  longer available for the WISMO228. If the ON/~OFF signal is HIGH, then the WISMO228 will also  be switched OFF. ...

  • Page 76: Wismo_Ready Indication

    Table 29. Electrical Characteristics of the WISMO_READY Indication Parameters I/O Type Minimum Typical Maximum Unit 2.95 Pin Description The following table provides the pin description of the WISMO_READY signal.  Table 30. WISMO_READY Indication Pin Description Pin # Signal I/O Type Description WISMO_READY WISMO228 ready indication WA_DEV_W228_PTS_002 Rev 001 Page 76 of 108...

  • Page 77: Electrical Characteristics

    Product Technical Specification & Customer Design Guidelines VCC_2V8 Output The VCC_2V8 output voltage supply is available when the WISMO228 is switched ON and can only  be used for pull‐up resistor(s) and as a reference supply.  Electrical Characteristics The following table describes the electrical characteristics of the VCC_2V8 signal.  Table 31. Electrical Characteristics of the VCC_2V8 Signal Parameters Minimum Typical Maximum Unit Output voltage 2.70 2.80 2.95 VCC_2V8 Full-power mode Output Current Sleep mode Pin Description The following table provides the pin description of the VCC_2V8 voltage supply. ...

  • Page 78: Bat-Rtc (Backup Battery)

    Input current consumption* µA Output voltage 2.82 3.18 Max charging current (@VBATT=3.6V) Provided by an RTC back-up battery when the WISMO228 is off and VBATT = 0V. Pin Description The following table provides the pin description of the BAT‐RTC voltage supply.  Table 34. BAT-RTC Pin Description Pin # Signal I/O Type...

  • Page 79: Super Capacitor

    Product Technical Specification & Customer Design Guidelines • A non rechargeable battery  • A rechargeable battery cell  Super Capacitor   Figure 37. RTC Supplied by a Gold Capacitor   Estimated supply time with a 0.47F gold capacitor: 25 minutes (minimum).  Note: The maximum voltage of the gold capacitor is 3.9V. Non-Rechargeable Battery   Figure 38. RTC Supplied by a Non Rechargeable Battery  ...

  • Page 80: Rechargeable Battery Cell

    Rechargeable Battery Cell   Figure 39. RTC Supplied by a Rechargeable Battery Cell   Estimated supply time with a fully charged 3.4mAh rechargeable battery: 7 days (minimum).  Caution: Before battery cell assembly, ensure that the cell voltage is lower than 3.0V to avoid damaging the WISMO228. WA_DEV_W228_PTS_002 Rev 001 Page 80 of 108...

  • Page 81: Tx_Ctrl Signal For Tx Burst Indication

    Product Technical Specification & Customer Design Guidelines TX_CTRL Signal for TX Burst Indication The TX_CTRL signal is a 2.8V indication signal for TX Burst with a 100KΩ pull‐up resistor  implemented inside the WISMO228 module.  Table 35. TX_CTRL Status WISMO228 State TX_CTRL Status During TX burst No TX High   During TX burst, there will be higher current drain from the VBATT power supply which causes a  voltage drop. This voltage drop from VBATT is a good indication of a high current drain situation  during TX burst.      Figure 40. TX_CTRL State During TX Burst Electrical Characteristics The following table describes the electrical characteristics of the TX_CTRL signal. ...

  • Page 82: Pin Description

    Product Technical Specification & Customer Design Guidelines Parameters Conditions Minimum Typical Maximum Unit µs Tdelay µs Pin Description The following table provides the pin description of the TX_CTRL signal.  Table 37. TX_CTRL Signal Pin Description Pin # Signal I/O Type Reset State Description TX_CTRL TX Burst indication Application The TX burst indication signal, TX_CTRL, can be used to drive an LED through a transistor.  It can  be a good visual indicator for any TX activities.   ...

  • Page 83: Reset

    Product Technical Specification & Customer Design Guidelines Reset The ~RESET pin is a hardware reset and should only be used for emergency resets. It has a 100KΩ  internal pull up resistor to VCC_2V8.   To activate the «emergency» reset sequence, the ~RESET signal has to be set to LOW level manually.  This can be done by using a push button, for example.        Figure 42. Reset Timing Electrical Characteristics The following table describes the electrical characteristics of the ~RESET signal.  Table 38. Electrical Characteristics of the Reset Signal Parameters Minimum Typical Maximum Unit Ω Input Impedance ( R )* 100K Input Impedance (C) 10nF...

  • Page 84: Pin Description

    Customer Design Guidelines Pin Description The following table provides the pin description of the RESET signal.  Table 39. Reset Pin Description Pin # Signal I/O Type Description 100K ~RESET WISMO228 Reset Pull-up Application If the «emergency» reset is used, it has to be driven by either a push button or an open  collector/drain transistor as shown in the figures below.    Push button ~RESET   Figure 43. Example of ~RESET Pin Connection with a Push Button Configuration  ...

  • Page 85: Reset Commands

    Product Technical Specification & Customer Design Guidelines Table 40. Reset Commands Reset Command ~RESET Operating Mode Reset activated Reset inactive   Note: It is recommended to add a varistor (such as the AVL5M02200 from AMOTECH) on the ~RESET pin in order to enhance ESD immunity. WA_DEV_W228_PTS_002 Rev 001 Page 85 of 108...

  • Page 86: Rf Interface

    Product Technical Specification & Customer Design Guidelines RF Interface The RF interface allows the transmission of radio frequency (RF) signals from the WISMO228 to an  external antenna. This interface has a nominal impedance of 50Ω and a DC resistance of 0Ω.  RF Connection The RF input/output of the WISMO228 is through one of the castellation pins (Pin 21, ANT), with  grounded castellation pins at both sides. This castellation pin must be connected to a 50Ω RF line in  order to protect the antenna line from the noise coming from baseband signals.    50Ω RF line Castellation pin for ANT   Ω Figure 45. Example of a 50 RF Line   The 50Ω RF line is surrounded by two ground planes in order to protect the antenna line from  noise. The length of the line shouldn’t be too long (no more than a few centimeters) because of RF  insertion loss. The width of the line must be calculated in order to ensure a 50Ω characteristic  impedance.  For this same reason, the embedded RF line should likewise be kept about 1cm away from any ...

  • Page 87: Rf Performances

    Product Technical Specification & Customer Design Guidelines 0.5dB can be considered as the maximum value for loss between the WISMO228 and an external connector. RF Performances RF performances are compliant with ETSI recommendation GSM 05.05. Listed below are the main  parameters for both the Receiver and the Transmitter.    The main parameters for the Receiver are:   • GSM850/EGSM900 Reference Sensitivity = ‐108 dBm (typ.)  • DCS1800/PCS1900 Reference Sensitivity = ‐108 dBm (typ.)  • Selectivity @ 200 kHz : > +9 dBc   • Selectivity @ 400 kHz : > +41 dBc  • Linear dynamic range: 63 dB ...
  • Page 88 Product Technical Specification & Customer Design Guidelines Characteristic WISMO228 Typical radiated gain 0dBi in one direction at least Caution: Both mechanical and electrical antenna adaptations are key issues in the design of a GSM terminal. It is strongly recommended to work with an antenna manufacturer to either develop an antenna adapted to the application or to adapt an existing solution to the application.

  • Page 89: Consumption Measurement Procedure

    Product Technical Specification & Customer Design Guidelines Consumption Measurement Procedure This chapter describes the consumption measurement procedure used to obtain the WISMO228  consumption specification.   The WISMO228 consumption specification values are measured for all operating modes available on  the product.   Hardware Configuration Consumption results are highly dependent on the hardware configuration used during  measurement and this section describes the hardware configuration settings that must be used to  obtain optimum consumption measurements.  The following hardware configuration includes both the measurement equipment and the  WISMO228 with its socket‐up board on the WISMO218 development kit.  Equipments Four devices are used to perform consumption measurement:  • A communication tester  • A current measuring power supply  • A standalone power supply  • A computer, to control the WISMO228 and save measurement data  WA_DEV_W228_PTS_002 Rev 001 Page 89 of 108...
  • Page 90 Product Technical Specification & Customer Design Guidelines       Figure 46. Typical Hardware Configuration   The communication tester is a CMU200 from Rhode & Schwartz. This tester offers all GSM/GPRS  network configurations required and allows a wide range of network configurations to be set.  The AX502 standalone power supply is used to supply all motherboard components except the  WISMO228. This is done with the objective to separate the WISMO218 Development Kit board  consumption from the WISMO228 consumption – which is measured by the other power supply,  the 66321B current measuring power supply. Both the standalone power supply and the current  measuring power supply are connected to and controlled by the computer (GPIB control, which is  not shown in the figure).  The standalone power supply, AX502 (or VBAT), may be set from 3.2V to 4.8V; while the current  measure power supply, 66321B (or VBATT), may also be set from 3.2V to 4.8 according to the  WISMO228 VBATT specifications.  A SIM must be inserted in the WISMO218 Development Kit during all consumption measurement.  The following table lists the recommended equipments to use for the consumption measurement.  WA_DEV_W228_PTS_002 Rev 001 Page 90 of 108...

  • Page 91: Wismo218 Development Kit

    • Audio  is  not  used;  therefore,  J702,  J703,  J704,  J705,  J605  must  be  opened  (by  removing  the  solder).  • There  is  no  SIM  detect  feature  on  the  WISMO228;  therefore,  J403  must  be  opened  (by  removing the soldered).  • Charging is not used; therefore, R602 must be removed.  • C600 and R607 must be removed to avoid unexpected current consumption. ...

  • Page 92: Socket-Up Board

    Socket-Up Board An adaptor board, the WISMO218 Socket‐Up Board (WM0801706‐020‐20), is used to connect the  WISMO228 to work on the WISMO218 Development Kit.  On this socket‐up board, the soldering points of J203, J204, JP101, JP102, JP103, JP104, JP105, JP106  and JP107 must be opened.  SIM Cards Consumption measurement may be performed with either 3‐Volt or 1.8‐Volt SIM cards. However,  all specified consumption values are for a 3‐Volt SIM card.  Caution: The SIM card’s voltage is supplied by the WISMO228’s power supply. Consumption measurement results may vary depending on the SIM card used. Software Configuration This section discusses the software configuration for the equipment(s) used and the WISMO228  settings.  WISMO228 Configuration The WISMO228 software configuration is simply performed by selecting the operating mode to use  in performing the measurement.  ...

  • Page 93: Equipment Configuration

    Product Technical Specification & Customer Design Guidelines Equipment Configuration The communication tester is set according to the WISMO228 operating mode. Paging during idle  modes, TX burst power, RF band and GSM/DCS/GPRS may be selected on the communication  tester.  Refer to the following table for the network analyzer configuration according to operating mode.  Table 43. Operating Mode Information Operating Mode Communication Tester Configuration OFF Mode Alarm Mode Paging 2 (Rx burst occurrence ~0,5s) Idle Mode Paging 9 (Rx burst occurrence ~2s)

  • Page 94: Template

    1800MHz Gam.18 (TX power 0dBm) Gam.3 (TX power 30dBm) 1900 MHz Gam.18 (TX power 0dBm) Template This template may be used for consumption measurement for all modes and configurations  available. Note that three VBATT voltages are used to measure consumption, namely: VBATTmin  (3.2V), VBATTtyp (3.6V) and VBATTmax (4.8V). The minimum/maximum RF transmission power  configurations are also set and measured.  Table 44. WISMO228 Power Consumption WISMO228 Power Consumption Operating Mode Parameters peak Unit M AX M AX average average average VBATT=4.8V...
  • Page 95 Product Technical Specification & Customer Design Guidelines PCL19 power 5dBm) PCL0 power 30dBm) 1800 MHz PCL15 power 0dBm) PCL0 power 30dBm) 1900 MHz PCL15 mA  power 0dBm) Gam.3 power 33dBm) 850 MHz Gam.17 mA  power 5dBm) Gam.3 power 33dBm) 900 MHz Gam.17 mA ...
  • Page 96 Product Technical Specification & Customer Design Guidelines Gam.3 power 30dBm) 1900 MHz Gam.18 mA  power 0dBm) Current consumption in OFF mode is measured with BAT-RTC being left open. WA_DEV_W228_PTS_002 Rev 001 Page 96 of 108...

  • Page 97: Technical Specifications

    Product Technical Specification & Customer Design Guidelines Technical Specifications Castellation Pins Pin Configuration   Figure 47. WISMO228 Pin Configuration   WA_DEV_W228_PTS_002 Rev 001 Page 97 of 108...

  • Page 98: Pin Description

    Product Technical Specification & Customer Design Guidelines Pin Description Table 45. WISMO228 Castellation Pin Description Pin # Signal Description Pin # Signal Description Speaker output SPKP Analog GPIO1 2.8V GPIO positive 32 ohms Speaker output 2.8V SPI interrupt SPKN Analog...

  • Page 99: Recommended Connection When Not Used

    Product Technical Specification & Customer Design Guidelines Pin # Signal Description Pin # Signal Description ~CT107/ 2.8V UART1: Data GPIO5 2.8V GPIO set ready ~CT109/ 2.8V UART1: Data Ground Ground carrier detect Radio antenna ~CT108/ 2.8V UART1: Data connection terminal ready ~CT125/ 2.8V UART1: Ring Ground...
  • Page 100 Input or an Output. Refer to Table 11: Main Serial Link Pin Description of the section discussing the SPI Bus for Debug Trace ONLY The WISMO228 provides one SPI bus through the castellation pin.  Caution: This interface is only used for monitoring trace for debug purposes. Pin Description The following table provides the pin description of the SPI bus. ...
  • Page 101 Pull down SPI Serial input SPI-CLK Pull down SPI Serial Clock ~SPI-CS Pull up SPI Enable SPI-IRQ Pull down SPI Interrupt   An SPI‐to‐UART2 conversion circuit is required to convert the SPI trace to UART2. Also, the SPI‐ IRQ (pin 25) is required for interrupt. Again, note that the SPI interface of the WISMO228 is not  open for application use other than debug trace.  SPI Waveforms   Figure 48. SPI Timing Diagram   WA_DEV_W228_PTS_002 Rev 001 Page 101 of 108...
  • Page 102 Product Technical Specification & Customer Design Guidelines   Figure 49. Example of an SPI to UART2 Interface Conversion Implementation   The following table lists the recommended components to use in implementing the SPI to UART2  interface.  Component Description/Details Manufacturer U103 SC16IS750IPW NXP Semiconductors 3, 6864MHz 86SMX surface mount crystal (971- X101 Farnell 3131) R104, R105 10KΩ...
  • Page 103 Product Technical Specification & Customer Design Guidelines   Figure 50. Example of an RS-232 Level Shifter Implementation for UART2   The following table lists the recommended components to use in implementing a UART transceiver  circuitry.  Component Description/Details Manufacturer U200 LTC2804IGN-1 LINEAR TECHNOLOGY L200 LQH2M CN100K02L MURATA J200 096615276119 SUBD9F HARTING R202 R204 100KΩ C200 1µF C201...

  • Page 104: Pcb Specifications For The Application Board

    Product Technical Specification & Customer Design Guidelines PCB Specifications for the Application Board In order to save costs for simple applications, a cheap PCB structure can be used for the application  board of the WISMO228. A 4‐layer through‐hole type PCB structure can be used.     Figure 51. PCB Structure Example for the Application Board Note: Due to the limited layers of 4-layer PCBs, sensitive signals like audio, SIM and clocks cannot be protected by 2 adjacent ground layers.

  • Page 105: Class B

    Product Technical Specification & Customer Design Guidelines Class B The WISMO228 remains fully functional across the specified temperature range. Some GSM  parameters may occasionally deviate from the ETSI specified requirements and this deviation does  not affect the ability of the WISMO228 to connect to the cellular network and be fully functional, as  it does within the Class A range.    The  detailed  climatic  and  mechanics  standard  environmental  constraints  applicable  to  the  WISMO228 are listed in the table below.  Table 49. Environmental Classes   WA_DEV_W228_PTS_002 Rev 001 Page 105 of 108...

  • Page 106: Mechanical Specifications

    Product Technical Specification & Customer Design Guidelines Mechanical Specifications Physical Characteristics The WISMO228 has a nearly‐complete self‐contained shield.  • Overall dimensions: 25.0 x 25.0 x 2.8 mm (excluding label thickness)  • Weight: 3.64g  Recommended PCB Landing Pattern Refer to the Customer Process Guideline for WISMO Series document.  WISMO228 Dimensions <to follow>  Figure 52. WISMO228 Dimensions WA_DEV_W228_PTS_002 Rev 001 Page 106 of 108...

  • Page 107: Recommended Peripheral Devices

    Product Technical Specification & Customer Design Guidelines Recommended Peripheral Devices General Purpose Connector The general purpose connector is a 46‐pin castellation connector with a 1.5mm pitch.  SIM Card Reader Listed below are the recommended SIM Card Readers to use with the WISMO228.  • ITT CANNON CCM03 series (see http://www.ittcannon.com )  • AMPHENOL C707 series (see http://www.amphenol.com )  • JAE (see http://www.jae.co.jp/e‐top/index.html )    Drawer type:  • MOLEX 99228‐0002 (connector) / MOLEX 91236‐0002 (holder) (see http://www.molex.com )  Microphone Microphones can be obtained from the following recommended suppliers:  • HOSIDEN  • PANASONIC  • PEIKER  Speaker Speakers can be obtained from the following recommended suppliers:  • SANYO ...

  • Page 108: Antenna Cable

    Product Technical Specification & Customer Design Guidelines Antenna Cable Listed below are the recommended antenna cables to mount on the WISMO228.  • RG178  • RG316  GSM Antenna GSM antennas and support for antenna adaptation can be obtained from manufacturers such as:  • ALLGON (http://www.allgon.com )  • HIRSCHMANN (http://www.hirschmann.com/ )  WA_DEV_W228_PTS_002 Rev 001 Page 108 of 108...

  • Page 109: Noises And Design

    Ground  plane:  It  is  recommended  to  have  a  common  ground  plane  for  analog/digital/RF  grounds.  • It is recommended to use a metallic case or plastic casing with conductive paint.  Power Supply The power supply is one of the key issues in the design of a GSM terminal and careful attention  should be paid to the following:  • Quality of the power supply: low ripple, PFM or PSM systems should be avoided (using a  PWM converter is preferred).  • The capacity to deliver high current peaks in a short time (pulsed radio emission).    A weak power supply design could affect the following items specifically:  • EMC performances  • The emissions spectrum  • Phase error and frequency error  Overvoltage The WISMO228 does not include any protection against overvoltage.    WA_DEV_W228_PTS_002 Rev 001 Page 109 of 109...

  • Page 110: Appendix

    Product Technical Specification & Customer Design Guidelines Appendix Standards and Recommendations GSM ETSI, 3GPP, and GCF recommendations for Phase II Specification Reference Title 3GPP TS 45.005 v5.5.0 (2002-08) Technical Specification Group GSM/EDGE. Radio Access Network; Release 5 Radio transmission and reception Digital cellular telecommunications system (Phase 2+);...
  • Page 111 Product Technical Specification & Customer Design Guidelines Specification Reference Title Technical Specification Group Core Network; 3GPP TS 04.08 V7.18.0 (2002-09) Digital cellular telecommunications system (Phase 2+); Mobile radio interface layer 3 specification (Release 1998) Technical Specification Group Core Networks; 3GPP TS 04.10 V7.1.0 (2001-12) Mobile radio interface layer 3 Supplementary services specification;...
  • Page 112 Digital cellular telecommunications system (Phase 2); ETS 300 641 (1998-03) Specification of the 3 Volt Subscriber Identity Module - Mobile Equipment (SIM-ME) interface (GSM 11.12 version 4.3.1) GCF-CC V3.7.1 (2002-08) Global Certification Forum – Certification criteria The WISMO228 can only be used for mobile and fixed applications. The antenna(s) used for the  transmitter must be installed at a minimum distance of 20cm from all persons and must not be co‐ located or operated with any other antenna or transmitter.  Users and installers must be provided with antenna installation instructions and transmitter  operating conditions for satisfying RF exposure compliance.  Note that when installed in portable devices, the RF exposure condition requires a separate ...

  • Page 113: Safety Recommendations (For Information Only)

    Product Technical Specification & Customer Design Guidelines Safety Recommendations (for Information Only) Warning: For the efficient and safe operation of your GSM application based on the WISMO228, please read the following information carefully. RF Safety General  Your GSM terminal is based on the GSM standard for cellular technology. The GSM standard is  spread all over the world. It covers Europe, Asia and some parts of America and Africa. This is the  most used telecommunication standard.  Your GSM terminal is actually a low power radio transmitter and receiver. It sends out and receives ...

  • Page 114: General Safety

    Product Technical Specification & Customer Design Guidelines Do not use the GSM terminal with a damaged antenna. If a damaged antenna comes into contact  with the skin, a minor burn may result. Replace a damaged antenna immediately. Consult your  manual to see if you may change the antenna yourself. If so, use only a manufacturer‐approved  antenna. Otherwise, have your antenna repaired by a qualified technician.  Use only the supplied or approved antenna. Unauthorized antennas, modifications or attachments  could damage the terminal and may contravene local RF emission regulations or invalidate type  approval.  General Safety Driving  Check the laws and the regulations regarding the use of cellular devices in the area where you have  to drive as you always have to comply with them. When using your GSM terminal while driving,  please:  • give full attention to driving,  • pull  off  the  road  and  park  before  making  or  answering  a  call  if  driving  conditions  so  require.  Electronic Devices ...
  • Page 115 Product Technical Specification & Customer Design Guidelines To prevent possible interference with aircraft systems, Federal Aviation Administration (FAA)  regulations require you to have permission from a crew member to use your terminal while the  aircraft is on the ground. To prevent interference with cellular systems, local RF regulations prohibit  using your modem while airborne.  Children  Do not allow children to play with your GSM terminal. It is not a toy. Children could hurt  themselves or others (by poking themselves or others in the eye with the antenna, for example).  Children could damage the modem, or make calls that increase your modem bills.  Blasting Areas  To avoid interfering with blasting operations, turn your unit OFF when in a « blasting area » or in  areas posted: « turn off two‐way radio ». Construction crews often use remote control RF devices to  set off explosives. Potentially Explosive Atmospheres  Turn your terminal OFF when in any area with a potentially explosive atmosphere. It is rare, but  your application or its accessories could generate sparks. Sparks in such areas could cause an  explosion or fire resulting in bodily injuries or even death.  Areas with a potentially explosive atmosphere are often, but not always, clearly marked. They  include fuelling areas such as petrol stations; below decks on boats; fuel or chemical transfer or  storage facilities; and areas where the air contains chemicals or particles, such as grain, dust, or  metal powders.  Do not transport or store flammable gas, liquid, or explosives in the compartment of your vehicle  which contains your terminal or accessories.  Before using your terminal in a vehicle powered by liquefied petroleum gas (such as propane or  butane) ensure that the vehicle complies with the relevant fire and safety regulations of the country  in which the vehicle is to be used.  WA_DEV_W228_PTS_002 Rev 001 Page 115 of 115...

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