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1 / Product Technical Specification & AirPrime WS March 28, 2012

2 Important Notice Due to the nature of wireless communications, transmission and reception of data can never be guaranteed. Data may be delayed, corrupted (i.e., have errors) or be totally lost. Although significant delays or losses of data are rare when wireless devices such as the Sierra Wireless modem are used in a normal manner with a well-constructed network, the Sierra Wireless modem should not be used in situations where failure to transmit or receive data could result in damage of any kind to the user or any other party, including but not limited to personal injury, death, or loss of property. Sierra Wireless accepts no responsibility for damages of any kind resulting from delays or errors in data transmitted or received using the Sierra Wireless modem, or for failure of the Sierra Wireless modem to transmit or receive such data. Safety and Hazards Do not operate the Sierra Wireless modem in areas where cellular modems are not advised without proper device certifications. These areas include environments where cellular radio can interfere such as explosive atmospheres, medical equipment, or any other equipment which may be susceptible to any form of radio interference. The Sierra Wireless modem can transmit signals that could interfere with this equipment. Do not operate the Sierra Wireless modem in any aircraft, whether the aircraft is on the ground or in flight. In aircraft, the Sierra Wireless modem MUST BE POWERED OFF. When operating, the Sierra Wireless modem can transmit signals that could interfere with various onboard systems. Note: Some airlines may permit the use of cellular phones while the aircraft is on the ground and the door is open. Sierra Wireless modems may be used at this time. The driver or operator of any vehicle should not operate the Sierra Wireless modem while in control of a vehicle. Doing so will detract from the driver or operator s control and operation of that vehicle. In some states and provinces, operating such communications devices while in control of a vehicle is an offence. 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. Customer understands that Sierra Wireless is not providing cellular or GPS (including A-GPS) services. These services are provided by a third party and should be purchased directly by the Customer Rev 2.4 March 28,

3 SPECIFIC DISCLAIMERS OF LIABILITY: CUSTOMER RECOGNIZES AND ACKNOWLEDGES SIERRA WIRELESS IS NOT RESPONSIBLE FOR AND SHALL NOT BE HELD LIABLE FOR ANY DEFECT OR DEFICIENCY OF ANY KIND OF CELLULAR OR GPS (INCLUDING A-GPS) SERVICES. Patents This product may contain technology developed by or for Sierra Wireless Inc. This product includes technology licensed from QUALCOMM. This product is manufactured or sold by Sierra Wireless Inc. or its affiliates under one or more patents licensed from InterDigital Group. Copyright 2012 Sierra Wireless. All rights reserved. Trademarks AirCard is a registered trademark of Sierra Wireless. Sierra Wireless, AirPrime, AirLink, AirVantage, Watcher and the Sierra Wireless logo are trademarks of Sierra Wireless.,,, insim, WAVECOM, WISMO, Wireless Microprocessor, Wireless CPU, Open AT are filed or registered trademarks of Sierra Wireless S.A. in France and/or in other countries. Windows and Windows Vista are registered trademarks of Microsoft Corporation. Macintosh and Mac OS are registered trademarks of Apple Inc., registered in the U.S. and other countries. QUALCOMM is a registered trademark of QUALCOMM Incorporated. Used under license. Other trademarks are the property of the respective owners. Contact Information Phone: Sales Desk: Hours: 8:00 AM to 5:00 PM Pacific Time Post: Sierra Wireless Wireless Way Richmond, BC Canada V6V 3A4 Fax: Web: Consult our website for up-to-date product descriptions, documentation, application notes, firmware upgrades, troubleshooting tips, and press releases: Rev 2.4 March 28,

4 Document History Version Date Updates 1.0 September 28, 2011 Creation 1.1 December 13, 2011 Updated for DV December 14, 2011 Updated Figure 1, UART1 baud rate unit Updated: Table 7 Electrical Characteristics of a 2.8V Type (2V8) Digital I/O Table 27 AC Characteristics of the Digital Audio Interface Table 33 Electrical Characteristics of the ON/~OFF Signal 2.0 February 22, 2012 Figure 51 WS6318 Operating Modes Flowchart Table 53 WS6318 Embedded Module Power Consumption Table 56 Applicable Standards and Requirements for the WS6318 Embedded Module 2.1 February 28, 2012 Updated Table 48 Electrical Characteristics of the BUZZER Signal Updated: section 3.3 Conformance with ATEX 94/9/CE Directive section Power ON Figure 33 Power-ON Sequence (no PIN code activated) section Hardware Power OFF 2.2 March 01, 2012 Table 53 WS6318 Embedded Module Power Consumption (Typical Values) Table 56 Applicable Standards and Requirements for the WS6318 Embedded Module Deleted section 10.5 GSM Antenna Updated: Section 1.3 Interfaces Section 1.4 Firmware Figure 1 Functional Architecture Figure 2 Power Supply During Burst Emission Section 4.9 Digital Audio Interface (PCM) 2.3 March 08, 2012 Figure 30 PCM Timing Waveform Table 36 Electrical Characteristics of the VCC_2V8 Output Table 37 Electrical Characteristics of the 2V8_LDO Output Specified the specific AT commands to use in: 4.10 Analog to Digital Converter 4.11 Digital Clock 5.2 VCC_2V8 and 2V8_LDO Outputs Rev 2.4 March 28,

5 Version Date Updates 2.4 March 28, 2012 Removed empty columns from: Table 2 Input Power Supply Voltage Table 10 UART Pin Description Table 12 UART Pin Description Table 14 SIM Interface Pin Description Table 26 PCM Interface Pin Description Table 30 Digital Clock Pin Description Updated: Table 9 GPIO Pin Description Table 15 s footnote Section 5.4 Reset Table 53 WS6318 Embedded Module Power Consumption (Typical Values) Table 54 Consumption/Software Driver Recommendations Fixed blurry schematic diagrams Deleted note from section 10.1 SIM Card Reader Rev 2.4 March 28,

6 Contents 1. INTRODUCTION Overall Dimensions GSM/GPRS Features Interfaces Firmware Connection Interfaces Environment Upgrades Forbidden FUNCTIONAL SPECIFICATIONS Functional Architecture RF Functionalities Baseband Functionalities TECHNICAL SPECIFICATIONS Power Supply Pin Description Application Recommended Components Mechanical Specifications AirPrime WS6318 Dimensions Recommended PCB Landing Pattern Conformance with ATEX 94/9/CE Directive INTERFACES LGA Pads Pin Configuration Pin Description Electrical Information for Digital I/O General Purpose Input/Output Pin Description Main Serial Link (UART1) Pin Description Application Level Shifter Implementation Possible V24/CMOS Designs Auxiliary Serial Link (UART2) Pin Description Application Level Shifter Implementation for Debug Purposes wire Serial Interface Hardware Design SIM Interface Rev 2.4 March 28,

7 Pin Description Electrical Characteristics Application SIM Socket Connection RF Interface RF Connection RF Performances Antenna Specifications Application Analog Audio Interface Pin Description Microphone Electrical Characteristics Application Speaker Electrical Characteristics Application Recommended Filtering Components Audio Track and PCB Layout Recommendation Digital Audio Interface (PCM) Pin Description Electrical Characteristics PCM Waveforms Analog to Digital Converter Pin Description Electrical Characteristics Digital Clock Pin Description Debug Interface Pin Description SIGNALS AND INDICATORS ON/~OFF Signal Pin Description Electrical Characteristics Application Power ON Power OFF VCC_2V8 and 2V8_LDO Outputs Pin Description Electrical Characteristics WISMO_READY Indication Pin Description Electrical Characteristics Reset Pin Description Rev 2.4 March 28,

8 Electrical Characteristics Internal Reset Emergency Reset Application BAT-RTC (Backup Battery) Pin Description Electrical Characteristics Application Super Capacitor Non-Rechargeable Battery Rechargeable Battery Cell Pulse-Width Modulators (PWMs) Pin Description Electrical Characteristics Application BUZZER Output Pin Description Electrical Characteristics Application Recommended Characteristics for the Buzzer TX_CTRL Signal for TX Burst Indication Pin Description Electrical Characteristics Application POWER CONSUMPTION Various Operating Modes Using AT+PSSLEEP to Enter Sleep Mode Power Consumption Recommendations for Less Consumption DESIGN GUIDELINES EMC Recommendations Power Supply PCB Specification for Application Board CERTIFICATION COMPLIANCE AND RECOMMENDED STANDARDS Certification Compliance Applicable Standards Listing RELIABILITY COMPLIANCE AND RECOMMENDED STANDARDS Reliability Compliance Applicable Standards Environmental Specifications Function Status Classification Reliability Prediction Model Rev 2.4 March 28,

9 Life Stress Test Environmental Resistance Stress Tests Corrosive Resistance Stress Tests Thermal Resistance Cycle Stress Tests Mechanical Resistance Stress Tests Handling Resistance Stress Tests PERIPHERAL DEVICES REFERENCES SIM Card Reader Microphone Speaker Antenna Cable REFERENCES Reference Documents Sierra Wireless Reference Documentation List of Abbreviations SAFETY RECOMMENDATIONS (FOR INFORMATION ONLY) RF Safety General Exposure to RF Energy Efficient Terminal Operation Antenna Care and Replacement General Safety Driving Electronic Devices Vehicle Electronic Equipment Medical Electronic Equipment Aircraft Children Blasting Areas Potentially Explosive Atmospheres Rev 2.4 March 28,

10 List of Figures Figure 1. Functional Architecture Figure 2. Power Supply During Burst Emission Figure 3. Reject Filter Diagram Figure 4. AirPrime WS6318 Mechanical Drawing Figure 5. LGA Pad Dimension and Location Figure 6. AirPrime WS6318 Pin Configuration (top view, through component) Figure 7. Example of an RS-232 Level Shifter Implementation for UART Figure 8. Example of a V24/CMOS Serial Link Implementation for 5-wire UART Figure 9. Example of a V24/CMOS Serial Link Implementation for 4-wire UART Figure 10. Example of a V24/CMOS Serial Link Implementation for 2-wire UART Figure 11. Example of a Full Modem V24/CMOS Serial Link Implementation for full UART Figure 12. Example of an RS-232 Level Shifter Implementation for UART Figure 13. Example of a V24/CMOS Serial Link Implementation for 2-wire UART Figure 14. Example of a SIM Socket Implementation Figure 15. Example of an RF 50Ω Line Figure 16. Suggested MIC Connection in Differential Mode Figure 17. Suggested MIC Connection in Single-Ended Mode Figure 18. Example of a MIC Input Connection with LC Filter Figure 19. Example of a MIC Input Connection without LC Filter Figure 20. Example of a Single-Ended MIC Input Connection with LC Filter Figure 21. Example of a Single-Ended MIC Input Connection without LC Filter Figure 22. Capacitor Soldered in Parallel to the Microphone Figure 23. Equivalent Circuit for SPK Figure 24. Example of a Differential Connection for SPK Figure 25. Example of a Differential Connection for SPK Figure 26. Example of a Single-Ended Speaker Connection (typical implementation) Figure 27. Audio Track Design Figure 28. Differential Audio Connection Figure 29. Single-Ended Audio Connection Figure 30. PCM Timing Waveform Figure 31. Example of the ON/~OFF Pin Connection Using a Switch Figure 32. Example of the ON/~OFF Pin Connection via an Open Collector Transistor Figure 33. Power-ON Sequence (no PIN code activated) Figure 34. Software Power OFF Sequence (after the ON/~OFF pin is High) Figure 35. Software Power OFF Sequence (before the ON/~OFF pin is High) Figure 36. Power-OFF Sequence Figure 37. Internal Reset Sequence Rev 2.4 March 28,

11 Figure 38. Reset Sequence Figure 39. Example of ~RESET Pin Connection with a Push Button Configuration Figure 40. Example of ~RESET Pin Connection with a Transistor Configuration Figure 41. RTC Supplied by a Gold Capacitor Figure 42. RTC Supplied by a Non Rechargeable Battery Figure 43. RTC Supplied by a Rechargeable Battery Cell Figure 44. Relative Timing for the PWM Output Figure 45. Example of a LED Driven by the PWM0 or PWM1 Output Figure 46. BUZZER Output Figure 47. Example of Buzzer Implementation Figure 48. Example of an LED Driven by the BUZZER Output Figure 49. TX_CTRL State During TX Burst Figure 50. Example of TX Status Implementation Figure 51. WS6318 Operating Modes Flowchart Figure 52. PCB Structure Example for the Application Board Rev 2.4 March 28,

12 List of Tables Table 1. List of RF Frequency Ranges Table 2. Input Power Supply Voltage Table 3. Power Supply Pin Description Table 4. Recommended Components for the Reject Filter Table 5. Available Interfaces and Signals Table 6. LGA Pads Description Table 7. Electrical Characteristics of a 2.8V Type (2V8) Digital I/O Table 8. Reset State Definition Table 9. GPIO Pin Description Table 10. UART Pin Description Table 11. Recommended Components Table 12. UART Pin Description Table 13. Recommended Components Table 14. SIM Interface Pin Description Table 15. Electrical Characteristics of the SIM Interface Table 16. Recommended Components Table 17. SIM Socket Pin Description Table 18. Antenna Specifications Table 19. Analog Audio Interface Pin Description Table 20. Electrical Characteristics of MIC Table 21. Recommended Components for a Microphone Connection Table 22. Recommended Components for a Single-Ended Microphone Connection Table 23. Speaker Details Table 24. Electrical Characteristics of SPK Table 25. Murata Examples Table 26. PCM Interface Pin Description Table 27. AC Characteristics of the Digital Audio Interface Table 28. Analog to Digital Converter Pin Description Table 29. Electrical Characteristics of the ADC Table 30. Digital Clock Pin Description Table 31. Test Points Pin Description Table 32. ON/~OFF Signal Pin Description Table 33. Electrical Characteristics of the ON/~OFF Signal Table 34. T ready and T rampup Values Table 35. VCC_2V8 and 2V8_LDO Pin Description Table 36. Electrical Characteristics of the VCC_2V8 Output Table 37. Electrical Characteristics of the 2V8_LDO Output Rev 2.4 March 28,

13 Table 38. WISMO_READY Indication Pin Description Table 39. Electrical Characteristics of the WISMO_READY Indication Table 40. Reset Pin Description Table 41. Electrical Characteristics of the ~RESET Signal Table 42. Reset Commands Table 43. BAT-RTC Pin Description Table 44. Electrical Characteristics of BAT-RTC Table 45. PWM Pin Description Table 46. Electrical Characteristics of the PWM Table 47. BUZZER Pin Description Table 48. Electrical Characteristics of the BUZZER Signal Table 49. TX_CTRL Status Table 50. TX_CTRL Signal Pin Description Table 51. Electrical Characteristics of the TX_CTRL Signal for TX Burst Indication Table 52. WS6318 Embedded Module Operating Modes Table 53. WS6318 Embedded Module Power Consumption (Typical Values) Table 54. Consumption/Software Driver Recommendations Table 55. Standards Conformity for the WS6318 Embedded Module Table 56. Applicable Standards and Requirements for the WS6318 Embedded Module Table 57. Standards Conformity for the AirPrime WS6318 Embedded Module Table 58. Applicable Standards and Requirements Table 59. Operating Class Temperature Range Table 60. ISO Failure Mode Severity Classification Table 61. Life Stress Test Table 62. Environmental Resistance Stress Tests Table 63. Corrosive Resistance Stress Tests Table 64. Thermal Resistance Cycle Stress Tests Table 65. Mechanical Resistance Stress Tests Table 66. Handling Resistance Stress Tests Rev 2.4 March 28,

14 1. Introduction The AirPrime WS6318 Intelligent Embedded Module is a highly compact 2G GSM/GPRS 900/1800 module for voice and data connectivity. It includes the radio, baseband, memory, and firmware in a package specifically designed for M2M applications Overall Dimensions Length: mm Width: mm Thickness: 2.5 mm 1.2. GSM/GPRS Features 2 Watts EGSM 900 radio section running under 3.6 Volts (nominal) 1 Watt GSM1800 radio section running under 3.6 Volts (nominal) Hardware GPRS class 10 capable 1.3. Interfaces Digital section running under 2.8 Volts 3V/1V8 SIM interface Complete interfacing and peripheral connectivity: VBATT power supply 10 GPIOs, 1 GPI 2 Serial links (UART1 and UART2, where UART2 is used for debug purposes only) Antenna An analog audio that comprise of: 2 Speakers 1 Microphone Digital audio (PCM) 2 ADCs 2 Clock outs Debug interface ON/OFF VCC_2V8 and 2V8_LDO outputs Module ready indication Reset RTC supply input 2 PWMs Buzzer TX Burst indication Rev 2.4 March 28,

15 Introduction 1.4. Firmware The AirPrime WS6318 is supported with firmware that allows comprehensive control through AT commands over a serial port and supports the following: Full GSM/GPRS Operating System stack with standard and dedicated M2M AT commands FTP and TCP/IP connectivity Real Time Clock with calendar Comprehensive usage and control of hardware interfaces 1.5. Connection Interfaces The AirPrime WS6318 has an LGA form factor with 86 solderable pads, including Ground pads, which provides: One RF connection pad (antenna connection) Power supply, module control and interface signals connection 1.6. Environment The AirPrime WS6318 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) Upgrades Forbidden Upgrading WS6318 modules is strictly forbidden as the product is packed in a Tape & Reel pack and sensitive to moisture exposure. Opening the bag for any purpose other than SMT assembly, and particularly for the purpose of upgrading the software, is done at the sole risk of the customer and would not be covered by the standard warranty conditions Rev 2.4 March 28,

16 2. Functional Specifications 2.1. Functional Architecture The global architecture of the AirPrime WS6318 is shown in the figure below. Figure 1. Functional Architecture Rev 2.4 March 28,

17 Functional Specifications 2.2. RF Functionalities The Radio Frequency (RF) range complies with the Phase II EGSM 900/DCS 1800 recommendation. The frequency range for the transmit band and receive band are listed in the table below. Table 1. List of RF Frequency Ranges Transmit Band (Tx) Receive Band (Rx) E-GSM to 915 MHz 925 to 960 MHz DCS to 1785 MHz 1805 to 1880 MHz The RF component of the WS6318 is based on a specific dual band chip which includes: a digital low-if receiver 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 2.3. Baseband Functionalities The WS6318 s baseband is composed of an ARM9, a DSP and an analog element (with audio signals, I/Q signals and ADC). The core power supply is 1.2V and the digital power supply is 2.8V Rev 2.4 March 28,

18 3. Technical Specifications 3.1. Power Supply 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 ripp ) on the supply voltage must not exceed a certain limit (refer to Table 2 Input Power Supply Voltage below). 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 2 Power Supply During Burst Emission below.) A GPRS class 10 terminal emits 1154µs radio bursts every 4.615ms. In connected mode, the peak current (1.4A peak in GSM /GPRS mode) flows with a ratio of: 1/8 of the time (around 577µs every 4.615ms for GSM /GPRS cl. 2) and 1/4 of the time (around 1154µs every 4.615ms for GSM /GPRS cl. 10) with the rising time at around 10µs. Figure 2. Power Supply During Burst Emission The external power supply source, VBATT, provides for the following functions: Directly supplies the RF components with 3.6V. Note that it is essential to keep a minimum voltage ripple at this connection in order to avoid any phase error. Internally used to provide, via several regulators, the supply required for the baseband signals. The following table describes the electrical characteristics of the input power supply voltage that will guarantee nominal functioning of the AirPrime WS6318 embedded module. Table 2. Input Power Supply Voltage V MIN V NOM V MAX I TYP I MAX VBATT 1, A 1.6A 1 This value has to be guaranteed during the burst (with 1.6A Peak in GSM or GPRS mode) 2 Maximum operating Voltage Stationary Wave Ratio (VSWR) 1.5: Rev 2.4 March 28,

19 Technical Specifications When powering the AirPrime WS6318 with a battery, the total impedance (battery + protections + PCB) should be less than 150mΩ Pin Description Table 3. Power Supply Pin Description Signal Pin Number(s) VBATT 61, 62, 63 GND 46, 47, 48, 50, 51, Application A reject filter can be connected between VBATT and the supply sources if the supply source is noisy. Caution: If the reject filter (C1+L1+C2) is an option, a capacitor (C2) is mandatory close to VBATT. Figure 3. Reject Filter Diagram Recommended Components Table 4. Recommended Components for the Reject Filter Component Value Component Reference Manufacturer GRM21BR60J106KE19L MURATA C1, C2 10µF +/-20% CM21X5R106M06AT KYOCERA JMK212BJ106MG-T TAYO YUDEN C2012X5R0J106MT TDK L1 200nH +/-20% XPL ML COILCRAFT 3.2. Mechanical Specifications The WS6318 embedded module has a complete self-contained shield. The mechanical specifications are described in the figures in the following sub-section Rev 2.4 March 28,

20 Technical Specifications AirPrime WS6318 Dimensions Figure 4. AirPrime WS6318 Mechanical Drawing Rev 2.4 March 28,

21 Technical Specifications Figure 5. LGA Pad Dimension and Location Rev 2.4 March 28,

22 Technical Specifications Recommended PCB Landing Pattern Refer to document [2] Customer Process Guideline for AirPrime WS Series Conformance with ATEX 94/9/CE Directive To evaluate the conformity of a product using the WS6318 embedded module with ATEX 94/9/CE directive, the integrator must take into account the following data from the WS6318: Sum of all capacitors: 36µF Sum of all inductors: 6.2µH Biggest single capacitor: 10µF ± 20% Biggest single inductor: 4.7µH ± 30% Rev 2.4 March 28,

23 4. Interfaces 4.1. LGA Pads The WS6318 embedded module has 86 solderable LGA pads, including Ground pads, which provides access to all available interfaces and signals. The following table lists the interfaces and signals available on the LGA pad and specifies whether these are driven by AT commands or not. Table 5. Available Interfaces and Signals Interface/Signal Analog Audio Interface Analog to Digital Converter Auxiliary Serial Link (for debug use only) BAT-RTC (Backup Battery) Buzzer Output Digital Audio Interface (PCM) Embedded Module Ready Indication General Purpose IO Main Serial Link ON/~OFF PWMs Reset SIM Interface TX Burst Indication Signal Driven by AT Commands Yes Yes No No Yes Yes No Yes Yes No Yes No Yes No Rev 2.4 March 28,

24 Interfaces Pin Configuration Figure 6. AirPrime WS6318 Pin Configuration (top view, through component) Rev 2.4 March 28,

25 Interfaces Pin Description Table 6. LGA Pads Description Pin # Signal Name Description I/O Recommendation for Unused Pins 1 GPIO12 2.8V General purpose input/output I/O Open 2 ~CT125/RI1* 2.8V UART1: Ring indicator O Open 3 ~CT105/RTS1* 2.8V UART1: Request to send I Connect to ~CT106/CTS** 4 ~CT106/CTS1* 2.8V UART1: Clear to send O Connect to ~CT105/RTS** 5 CT103/TXD1* 2.8V UART1: Transmit data I 6 CT104/RXD1* 2.8V UART1: Receive data O 7 ~CT108/DTR1* 2.8V UART1: Data terminal ready I Connect to ~CT107/DSR** 8 ~CT109/DCD1* 2.8V UART1: Data carrier detect O 9 ~CT107/DSR1* 2.8V UART1: Data set ready O Connect to ~CT108/DTR** 10 GPIO11 2.8V General purpose input/output I/O Open 11 ~RESET Input reset signal I Open 12 BUZZER 2.8V Buzzer PWM2 O Open 13 PWM1 2.8V DC PWM 1 O Open 14 PWM0 2.8V DC PWM 0 O Open 15 SPK1N Speaker 1 negative output (32Ω impedance) O Open 16 SPK1P Speaker 1 positive output (32Ω impedance) O Open 17 SPK2N Speaker 2 negative output (16Ω impedance) O Open 18 SPK2P Speaker 2 positive output (16Ω impedance) O Open 19 MICP Microphone positive input I Open 20 MICN Microphone negative input I Open 21 BAT-RTC Power supply for RTC backup I/O Open 22 26M_CLKOUT 26M clock output O 23 32K_CLKOUT 32K clock output O 24 AUX_ADC1 Analog to digital converter I Ground 25 AUX_ADC0 Analog to digital converter I Ground 26 SIM-VCC SIM power supply O 27 SIM-CLK SIM clock O 28 SIM-IO SIM data input/output I/O 29 ~SIM-RST SIM reset O 30 SIM-PRES SIM detection I 31 CT103/TXD2* 2.8V UART2: Transmit data I Test point for debug purpose 32 CT104/RXD2* 2.8V UART2: Receive data O Test point for debug purpose 33 PCM_OUT PCM data out O 34 PCM_IN PCM data in I 35 PCM_SYNC PCM sync out I/O 36 PCM_CLK PCM clock I/O Rev 2.4 March 28,

26 Interfaces Pin # Signal Name Description I/O Recommendation for Unused Pins 37 GPIO10 2.8V General purpose input/output I/O 38 GPIO9 2.8V General purpose input/output I/O 39 GPIO8 2.8V General purpose input/output I/O 40 GPIO7 2.8V General purpose input/output I/O 41 GPIO6 2.8V General purpose input/output I/O 42 GPIO5 2.8V General purpose input/output I/O 43 GPI4 2.8V General purpose input I 44 2V8_LDO 2.8V LDO regulator output O Open 45 VCC_2V8 2.8V power supply from the embedded module O Open 46 GND Ground 47 GND Ground 48 GND Ground 49 ANT Radio antenna connection I/O 50 GND Ground 51 GND Ground 52 TP7 Test point 7 O Test point for debug purpose 53 TP6 Test point 6 O Test point for debug purpose 54 TP5 Test point 5 I Test point for debug purpose 55 TP4 Test point 4 I Test point for debug purpose 56 TP3 Test point 3 I Test point for debug purpose 57 TP2 Test point 2 O Test point for debug purpose 58 TP1 Test point 1 I Test point for debug purpose 59 ON/~OFF Power On control signal I 60 TX_CTRL 2.8V TX burst indicator O Not connected 61 VBATT Power supply I 62 VBATT Power supply I 63 VBATT Power supply I 64 WISMO_READY 2.8V Embedded module ready O Open 65 GPIO2 2.8V General purpose input/output I/O Open 66 GPIO1 2.8V General purpose input/output I/O Open GND Ground * UART signal names are according to PC view. ** Please refer to section Application for more information regarding the connection between DSR and DTR; and CTS and RTS Rev 2.4 March 28,

27 Interfaces 4.2. Electrical Information for Digital I/O Refer to the following table for the electrical characteristics of a 2.8V type (2V8) digital I/O. Table 7. Electrical Characteristics of a 2.8V Type (2V8) Digital I/O Parameter I/O Type Minimum Typical Maximum Condition Internal 2.8V power supply VCC_2V8 2.7V 2.8V 2.95V V IL CMOS -0.4V* - 0.4V V IH CMOS 2.4V - VCC_2V V* Input / Output pin V OL CMOS V V OH * Absolute maximum ratings 2.7V - - CMOS 2.4V - - I OH = 1mA Reset states of the I/Os are given in each interface/signal description chapter. Definitions of these states are given in the table below. Table 8. Reset State Definition Reset State Definition 0 Set to GND 1 Set to 2V8 supply Pull-down Internal pull-down with ~60kΩ resistor Pull-up Internal pull-up with ~60kΩ resistor to 2V8 supply Z High impedance Undefined Caution: Undefined must not be used in an application if a specified state is required at reset. These pins may be toggling a signal(s) during reset General Purpose Input/Output The WS6318 embedded module provides ten (10) General Purpose I/Os, and one (1) General Purpose Input. They are used to control any external device such as an LCD or a keyboard backlight Pin Description Table 9. GPIO Pin Description Signal Pin Number I/O I/O Type Reset State Description GPIO1 66 I/O 2V8 Input pull down General purpose input/output GPIO2 65 I/O 2V8 Input pull up General purpose input/output GPI4 43 I 2V8 Input pull down General purpose input GPIO5 42 I/O 2V8 Input pull down General purpose input/output GPIO6 41 I/O 2V8 Input pull up General purpose input/output GPIO7 40 I/O 2V8 Input pull down General purpose input/output Rev 2.4 March 28,

28 Interfaces Signal Pin Number I/O I/O Type Reset State Description GPIO8 39 I/O 2V8 Input pull up General purpose input/output GPIO9 38 I/O 2V8 Input pull down General purpose input/output GPIO10 37 I/O 2V8 Input pull down General purpose input/output GPIO11 10 I/O 2V8 Input pull down General purpose input/output GPIO12 1 I/O 2V8 Input pull down General purpose input/output Note: Pin 43, GPI4, is used as a general purpose input pin ONLY Main Serial Link (UART1) The main serial link (UART1) is used for communication between the WS6318 embedded module and a PC or host processor. It consists of a flexible 8-wire serial interface that complies with V24 protocol signaling, but not with V28 (electrical interface) due to its 2.8-Volt interface. To get a V28 (i.e. RS-232) interface, an RS-232 level shifter device is required as described in section Level Shifter Implementation. The UART1 interface is a 2.8V type, but is 3V tolerant. The supported baud rates of the UART1 are 1200, 2400, 4800, 9600, 19200, 38400, and bit/s, with autobauding. The signals used by UART1 are as follows: TX data (CT103/TXD1) RX data (CT104/RXD1) Request To Send (~CT105/RTS1) Clear To Send (~CT106/CTS1) Data Terminal Ready (~CT108/DTR1) Data Set Ready (~CT107/DSR1) Data Carrier Detect (~CT109/DCD1) Ring Indicator (~CT125/RI1) Pin Description Refer to the following table for the pin description of the UART1 interface. Table 10. UART Pin Description Signal* Pin Number I/O I/O Type Description CT103/TXD1 5 I 2V8 Transmit serial data CT104/RXD1 6 O 2V8 Receive serial data ~CT105/RTS1 3 I 2V8 Request to send ~CT106/CTS1 4 O 2V8 Clear to send ~CT107/DSR1 9 O 2V8 Data set ready ~CT108/DTR1 7 I 2V8 Data terminal ready ~CT109/DCD1 8 O 2V8 Data carrier detect ~CT125/RI1 2 O 2V8 Ring indicator * According to PC (DTE) view Rev 2.4 March 28,

29 Interfaces The rising time and falling time of the reception signals (mainly CT103/TXD1) have to be less than 300ns. Tip: The WS6318 embedded module is designed to operate using all the serial interface signals. In particular, it is recommended to use ~CT105/RTS1 and ~CT106/CTS1 for hardware flow control in order to avoid data corruption during transmissions Application Level Shifter Implementation The level shifter must be 2.8V with V28 electrical signal compliance. Figure 7. Example of an RS-232 Level Shifter Implementation for UART1 Note: Table 11. The U1 chip also protects the WS6318 embedded module against ESD (Air Discharge) at 15KV. Recommended Components Component Description/Details Manufacturer R1, R2 15KΩ C1, C2, C3, C4, C5 1µF C6 100nF C7 6.8µF TANTAL 10V CP32136 AVX U1 ADM3307EACP ANALOG DEVICES J1 SUB-D9 female R1 and R2 are necessary only during Reset state to force the ~CT125/RI1 and ~CT109/DCD1 signals to HIGH level. The ADM3307EACP can be powered by the 2V8_LDO (pin 44) of the WS6318 embedded module or by an external regulator at 2.8V. If the UART1 interface is connected directly to a host processor, it is not necessary to use level shifters. The interface can be connected as shown in the following sub-sections Rev 2.4 March 28,

30 Interfaces Possible V24/CMOS Designs wire Serial Interface Hardware Design The signals used in this interface are as follows: CT103/TXD1 CT104/RXD1 ~CT105/RTS1 ~CT106/CTS1 ~CT108/DTR1 The signal ~CT108/DTR1 must be managed following the V24 protocol signaling if we want to use idle mode. Figure 8. Example of a V24/CMOS Serial Link Implementation for 5-wire UART wire Serial Interface Hardware Design The signals used in this interface are as follows: CT103/TXD1 CT104/RXD1 ~CT105/RTS1 ~CT106/CTS1 The signal ~CT108/DTR1 can be looped back to ~CT107/DSR1 from both the WS6318 embedded module side and from the DTE side Rev 2.4 March 28,

31 Interfaces Figure 9. Example of a V24/CMOS Serial Link Implementation for 4-wire UART wire Serial Interface Hardware Design Caution: Although this case is possible for a connected external chip, it is not recommended. The flow control mechanism has to be managed from the customer side. The signals used in this interface are as follows: CT103/TXD1 CT104/RXD1 The signal ~CT108/DTR1 can be looped back to ~CT107/DSR1 from both the WS6318 embedded module side and from the DTE side. Note: The loop back connection of ~CT108/DTR1 to ~CT107/DSR1 is not allowed when AT+PSSLEEP=0 is used, for which sleep mode entry is ~CT108/DTR1 level dependent. (Refer to section 6.1.1Using AT+PSSLEEP to Enter Sleep Mode.) In order to go to sleep mode properly under such configuration, AT+PSSLEEP=1 should be used instead. For details, please refer to document [1] AT Command Manual for AirPrime WS6318. The signal ~CT105/RTS1 can be looped back to ~CT106/CTS1 from both the WS6318 embedded module side and from the DTE side. Because signals ~CT105/RTS1 and ~CT106/CTS1 are not used, the default hardware flow control on UART should be de-activated using the AT command, AT+IFC=0,0. Refer to document [1] AT Command Manual for AirPrime WS6318 for more information. Figure 10. Example of a V24/CMOS Serial Link Implementation for 2-wire UART Rev 2.4 March 28,

32 Interfaces Full Modem Hardware Design The designs shown in the preceding sections are basic designs. Both ~CT109/DCD1 and ~CT125/RI1 can be left open when not used. However, a more flexible design to access this serial link with all modem signals is shown below. Figure 11. Example of a Full Modem V24/CMOS Serial Link Implementation for full UART1 Note that there is an internal 10KΩ pull-up resistor on ~CT109/DCD1 to set it to HIGH level during the reset state; and that it is necessary to add an external pull-up resistor on ~CT125/RI Auxiliary Serial Link (UART2) The auxiliary serial link (UART2) is used for debug purposes only. It consists of a flexible 2-wire serial interface that complies with V24 protocol signaling, but not with V28 (electrical interface) due to its 2.8-Volt interface. To get a V28 (i.e. RS-232) interface, an RS-232 level shifter device is required as described in section Level Shifter Implementation. The UART2 interface is a 2.8V type, but is 3V tolerant. The signals used by UART2 are as follows: TX data (CT103/TXD2) RX data (CT104/RXD2) Pin Description Refer to the following table for the pin description of the UART2 interface. Table 12. UART Pin Description Signal* Pin Number I/O I/O Type Description CT103/TXD2 31 I 2V8 Transmit serial data/test CT104/RXD2 32 O 2V8 Receive serial data * According to PC (DTE) view Rev 2.4 March 28,

33 Interfaces Application Note: It is mandatory to route out a test point for these two UART2 pins as they are reserved for debug purposes Level Shifter Implementation for Debug Purposes The level shifter must be 2.8V with V28 electrical signal compliance. Figure 12. Example of an RS-232 Level Shifter Implementation for UART2 Note: Table 13. The U1 chip also protects the WS6318 embedded module against ESD (Air Discharge) at ±10KV. Recommended Components Component Description/Details Manufacturer C1 220nF C2, C3, C4 1µF L1 10µH U1 LTC2804IGN-1 LINEAR TECHNOLOGY LTC J1 SUB-D9 female The LTC2804IGN-1 can be powered by the 2V8_LDO (pin 44) of the WS6318 embedded module or by an external regulator at 2.8V. If the UART2 interface is connected directly to a host processor, it is not necessary to use level shifters. The interface can be connected as shown in the following sub-section Rev 2.4 March 28,

34 Interfaces wire Serial Interface Hardware Design The signals used in this interface are as follows: CT103/TXD2 CT104/RXD2 Figure 13. Example of a V24/CMOS Serial Link Implementation for 2-wire UART SIM Interface The Subscriber Identification Module (SIM) can be directly connected to the WS6318 embedded module through this dedicated interface. This interface can control both 1.8V and 3V SIM cards and is fully compliant with the GSM recommendations concerning SIM functions. The four (4) signals used by this interface are as follows: SIM-VCC: power supply SIM-CLK: clock SIM-IO: I/O port ~SIM-RST: reset An additional signal for SIM card detection is also available: SIM-PRES: SIM card detection Pin Description Refer to the following table for the pin description of the SIM interface. Table 14. SIM Interface Pin Description Signal Pin Number I/O I/O Type Description SIM-VCC 26 O 2V9/1V8 SIM power supply SIM-CLK 27 O 2V9/1V8 SIM clock SIM-IO 28 I/O 2V9/1V8 SIM data input/output ~SIM-RST 29 O 2V9/1V8 SIM reset SIM-PRES 30 I 2V8 SIM detection Rev 2.4 March 28,

35 Interfaces Electrical Characteristics Refer to the following table for the electrical characteristics of the SIM interface. Table 15. Electrical Characteristics of the SIM Interface Parameter Conditions Minimum Typical Maximum Unit SIM-IO V IH I IH = ± 20µA 0.7xVSIM - - V SIM-IO V IL I IL = 1mA * 0.36** V ~SIM-RST, SIM-CLK V OH Source current = 20µA 0.9xVSIM - - V SIM-IO V OH Source current = 20µA 0.8xVSIM - - V ~SIM-RST, SIM-IO, SIM-CLK V OL SIM-VCC Output Voltage SIM-VCC current SIM-CLK Rise/Fall Time ~SIM-RST, Rise/Fall Time SIM-IO Rise/Fall Time Sink current = -1mA * 0.3** V SIM-VCC = 2.9V V SIM-VCC = 1.8V V Full-power mode ma Sleep mode with 32kHz system clock enabled ma Loaded with 30pF and ESD protection diode ns Loaded with 30pF and ESD protection diode ns Loaded with 30pF and ESD protection diode µs SIM-CLK Frequency Loaded with 30pF MHz SIM-PRES V IH V SIM-PRES V IL V * 3.0V SIM (Class B Electrical) ** 1.8V SIM (Class C Electrical) Note: Sierra Wireless is compliant with ETSI TS (version 2.0, release 8, June 2009) Application It is recommended to add Transient Voltage Suppressor diodes (TVS) on the signals connected to the SIM socket in order to prevent any Electrostatic Discharge. These types of diodes are mandatory for the Full Type Approval. They should be placed as close to the SIM socket as possible. TVS diodes with low capacitance (less than 10pF) also have to be connected on the SIM-CLK and SIM-IO signals to avoid any disturbance from the rising and falling edge Rev 2.4 March 28,

36 Interfaces Figure 14. Example of a SIM Socket Implementation Refer to the table below for the recommended components to use with the SIM interface. Table 16. Recommended Components Component Description/Details Manufacturer R1 100KΩ C1 470pF 100nF C2 (Note that this capacitor, C2, on the SIM-VCC line must not exceed 330nF.) D1 ESDA6V1SC6 ST D2 DALC208SC6 ST Microelectronics J1 ITT CANNON CCM03 series (See section 10.1 SIM Card Reader for more information) CANNON SIM Socket Connection The following table lists the SIM socket pin description. Table 17. SIM Socket Pin Description Signal Pin Number Description VCC 1 SIM-VCC RST 2 ~SIM-RST CLK 3 SIM-CLK CC4 4 SIM-PRES with 100kΩ pull down resistor GND 5 GROUND VPP 6 Not connected I/O 7 SIM-IO CC8 8 VCC_2V8 (pin 45) of the WS6318 embedded module Rev 2.4 March 28,

37 Interfaces 4.7. RF Interface The RF (radio frequency) interface of the WS6318 embedded module allows the transmission of RF signals. This interface has a 50Ω nominal impedance and a 0Ω DC resistance RF Connection The RF input/output of the WS6318 embedded module is through one of the LGA pads (pin 49, ANT). A 50Ω stripline can be used to connect to standard RF connectors such as SMA, UFL, etc. for antenna connection. Note: The antenna cable and connector should be chosen in order to minimize loss in the frequency bands used for GSM900MHz and 1800MHz.The maximum loss value that can be considered between the WS6318 embedded module and an external connector is 0.5dB RF Performances RF performances are compliant with the ETSI recommendation GSM The main receiver parameters are: E-GSM900 Reference Sensitivity = -109 dbm (typical) DCS1800 Reference Sensitivity = -109 dbm (typical) 200 khz : > +9 dbc 400 khz : > +41 dbc Linear dynamic range: 63 db Co-channel rejection: >= 9 dbc The main transmitter parameters are: Maximum output power (EGSM): 33 dbm +/- 2 db at ambient temperature Maximum output power (GSM1800): 30 dbm +/- 2 db at ambient temperature Minimum output power (EGSM): 5 dbm +/- 5 db at ambient temperature Minimum output power (GSM1800): 0 dbm +/- 5 db at ambient temperature Antenna Specifications The optimum operating frequency depends on the application. A dual-band antenna will work in these frequency bands and should have the characteristics specified in the following table. Table 18. Antenna Specifications Characteristic E-GSM 900 DCS 1800 TX Frequency 880 to 915 MHz 1710 to 1785 MHz RX Frequency 925 to 960 MHz 1805 to 1880 MHz Impedance 50Ω VSWR Rx max 1.5 :1 Tx max 1.5 :1 Typical radiated gain 0dBi in one direction at least Rev 2.4 March 28,

38 Interfaces Tip: Sierra Wireless strongly recommends working with an antenna manufacturer either to develop an antenna adapted to the application or to adapt an existing solution to the application. Both the mechanical and electrical antenna adaptations are one of the key issues in the design of the GSM terminal Application The RF antenna connection uses one of the LGA pads of the WS6318 embedded module, with ground pads at both sides. This LGA pad must be connected to a 50Ω RF line in order to protect the antenna line from the noise coming from baseband signals. ESD Diode 50Ω RF line LGA pad for ANT (pin 49) Figure 15. Example of an RF 50Ω Line This 50Ω line is surrounded by two ground planes in order to protect this antenna line from noise. The length of the line shouldn t be too long (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 RF embedded line should likewise be kept about 1cm away from any (noisy) baseband signal in order to ensure good RX sensitivity level. The other end of the RF 50Ω line can be connected to an RF connector or a soldering pad in order to connect an antenna. It is also possible to use an antenna chip or to design a PCB antenna directly on the application board. The ANT pin of the WS6318 embedded module is ESD protected, for both ±4KV contact and ±8KV air discharge. One of the suggested ESD diodes is listed below: Manufacturer: INNOCHIPS TECHNOLOGY CO. Part Number: ULCE0505A015FR In order to enhance the antenna s resistance to higher ESD levels, it is recommended to add an ESD diode close to the RF connector of the final application Analog Audio Interface The WS6318 embedded module supports one microphone input and two speaker outputs. It also includes a noise suppression and echo cancellation feature which allows for an enhanced voice call quality. In some cases, ESD protection must be added on the audio interface lines Rev 2.4 March 28,

39 Interfaces Pin Description Refer to the following table for the pin description of the analog audio interface. Table 19. Analog Audio Interface Pin Description Signal Pin Number I/O I/O Type Description SPK1N 15 O Analog Speaker 1 negative output (32Ω impedance) SPK1P 16 O Analog Speaker 1 positive output (32Ω impedance) SPK2N 17 O Analog Speaker 2 negative output (16Ω impedance) SPK2P 18 O Analog Speaker 2 positive output (16Ω impedance) MICP 19 I Analog Microphone positive input MICN 20 I Analog Microphone negative input Microphone The microphone, MIC, can either have a single-ended or a differential connection. However, performance with common mode noise and TDMA noise varies depending on the connection mode and PCB layout. When connecting a microphone to the WS6318, ensure 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 the MIC input is internally adjusted and can be tuned using AT commands. The WS6318 MIC pins already include suitable biasing for an electret microphone. The electret microphone can then be connected directly on the inputs for easy connection. AC coupling is also already embedded in the WS6318 embedded module. Figure 16. Suggested MIC Connection in Differential Mode Figure 17. Suggested MIC Connection in Single-Ended Mode Rev 2.4 March 28,

40 Interfaces Electrical Characteristics Refer to the following table for the electrical characteristics of the microphone interface. Table 20. Electrical Characteristics of MIC Parameters Minimum Typical Maximum Unit Internal biasing DC Characteristics AC Characteristics 200 Hz<F<4 khz Maximum working voltage (MICP-MICN) (THD 10%) Maximum rating voltage (MICP or MICN) MICP V MICN without 2k2Ω to GND V MICN with 2k2Ω to GND V Output current ma Z2 MICP (MICN=Open) Z2 MICN (MICP=Open) 2.2 Z2 MICP (MICN=GND) 2.2 Z2 MICN (MICP=GND) KΩ Impedance between MICP and MICN without 2k2Ω to GND 4.5 Impedance between MICP and MICN with 2k2Ω to GND 3.2 AT+VGT*= mvpp V * The input voltage depends on the input micro gain set by the AT command. Please refer to document [1] AT Command Manual for AirPrime WS6318. 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. Only a passive microphone can be directly connected to the MICP input Application It is recommended to add ESD protection to the microphone when it is exposed to the external environment. The ESD protection should be connected between the audio lines and a good ground, and placed as close to the microphone as possible. Also ensure to have a good ground plane, good filtering as well as shielding, in order to avoid any disturbance on the audio path. It is important to select an appropriate microphone and filtering components to avoid TDMA noise Rev 2.4 March 28,

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