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Quectel M35 User Manual

Gsm/gprs module series
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M35
User Manual
GSM/GPRS Module Series
Rev. M35_User_Manual_V3.1
Date: 2014-11-26
www.quectel.com

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Summary of Contents for Quectel M35

  • Page 1 User Manual GSM/GPRS Module Series Rev. M35_User_Manual_V3.1 Date: 2014-11-26 www.quectel.com...
  • Page 2 QUECTEL OFFERS THIS INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION.

  • Page 3: About The Document

    GSM/GPRS Module Series M35 User Manual About the Document History Revision Date Author Description 2011-12-29 Luka WU Initial Added current consumption GPRS communication mode. Modified AT command AT+QAUDCH in Chapter 2012-05-18 Luka WU 3.10. Modified the Footprint of recommendation. Updated module package type.
  • Page 4 GSM/GPRS Module Series M35 User Manual Modified UART application in Section 3.7.3 Modified SIM card interface in Section 3.10 Added antenna requirement in Section 4.5 M35_User_Manual Confidential / Released 3 / 85...

  • Page 5: Table Of Contents

    GSM/GPRS Module Series M35 User Manual Contents About the Document ........................... 2 Contents ............................... 4 Table Index ..............................7 Figure Index ..............................8 Introduction ............................10 1.1. Safety Information ......................... 11 Product Concept ..........................12 2.1. General Description ....................... 12 2.2.
  • Page 6 GSM/GPRS Module Series M35 User Manual 3.7.1. UART Port ........................39 3.7.1.1. The Features of UART Port ................39 3.7.1.2. The Connection of UART .................. 40 3.7.1.3. Firmware Upgrade ..................... 42 3.7.2. Debug Port ........................42 3.7.3. UART Application ......................43 3.8.
  • Page 7 GSM/GPRS Module Series M35 User Manual 7.1. Storage ..........................74 7.2. Soldering ..........................74 7.3. Packaging ..........................75 7.3.1. Tape and Reel Packaging ....................75 Appendix A Reference ........................78 Appendix B GPRS Coding Scheme ....................83 10 Appendix C GPRS Multi-slot Class ....................85...
  • Page 8 GSM/GPRS Module Series M35 User Manual Table Index TABLE 1: MODULE KEY FEATURES ....................... 13 TABLE 2: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE ......15 TABLE 3: PIN DESCRIPTION ........................... 19 TABLE 4: MULTIPLEXED FUNCTIONS ......................23 TABLE 5: OVERVIEW OF OPERATING MODES .....................
  • Page 9 GSM/GPRS Module Series M35 User Manual Figure Index FIGURE 1: MODULE FUNCTIONAL DIAGRAM ....................16 FIGURE 2: PIN ASSIGNMENT ......................... 18 FIGURE 3: VOLTAGE RIPPLE DURING TRANSMITTING ................25 FIGURE 4: REFERENCE CIRCUIT FOR THE VBAT INPUT ................26 FIGURE 5: REFERENCE CIRCUIT FOR POWER SUPPLY ................26 FIGURE 6: TURN ON THE MODULE WITH AN OPEN-COLLECTOR DRIVER ..........
  • Page 10 M35 User Manual FIGURE 42: RF SOLDERING SAMPLE ......................64 FIGURE 43: M35 MODULE TOP AND SIDE DIMENSIONS (UNIT: MM) ............70 FIGURE 44: M35 MODULE BOTTOM DIMENSIONS (UNIT: MM) ..............71 FIGURE 45: RECOMMENDED FOOTPRINT (UNIT: MM) ................72 FIGURE 46: TOP VIEW OF THE MODULE ......................

  • Page 11: Introduction

    This document can help you quickly understand module interface specifications, electrical and mechanical details. Associated with application notes and user guide, you can use M35 module to design and set up mobile applications easily.

  • Page 12: Safety Information

    If not so, Quectel does not take on any liability for your failure to comply with these precautions.

  • Page 13: Product Concept

    M35 is an SMD type module with LCC package, which can be easily embedded into applications. It provides abundant hardware interfaces like Audio and UART Interface. Designed with power saving technique, the current consumption of M35 is as low as 1.3 mA in SLEEP mode when DRX is 5.

  • Page 14: Key Features

    The manual of the host system, which uses M35 must include RF exposure warning statement to advice user should keep minimum 20cm from the radio antenna of M35 module depending on the Mobile status. Note: If a portable device (such as PDA) uses M35 module, the device needs to do permissive change and SAR testing.
  • Page 15 GSM/GPRS Module Series M35 User Manual Single supply voltage: 3.3V ~ 4.6V Power Supply Typical supply voltage: 4V Typical power consumption in SLEEP mode: 1.3 mA @DRX=5 Power Saving 1.2 mA @DRX=9  Quad-band: GSM850, EGSM900, DCS1800, PCS1900  The module can search these frequency bands automatically Frequency Bands ...

  • Page 16: Functional Diagram

    15.6kbps 31.2kbps 62.4kbps CS-4 21.4kbps 42.8kbps 85.6kbps 2.4. Functional Diagram The following figure shows a block diagram of M35 and illustrates the major functional parts.  Radio frequency part  Power management  The Peripheral interface —Power supply M35_User_Manual Confidential / Released...

  • Page 17: Evaluation Board

    2.5. Evaluation Board In order to help you to develop applications with M35, Quectel supplies an evaluation board (EVB), RS-232 to USB cable, power adapter, earphone, antenna and other peripherals to control or test the module. For details, please refer to the document [4].

  • Page 18: Application Interface

    GSM/GPRS Module Series M35 User Manual Application Interface The module adopts LCC package and has 42 pins. The following chapters provide detailed descriptions about these pins below:  Power supply  Power on/down   Serial interfaces  Audio interfaces ...

  • Page 19: Pin Of Module

    GSM/GPRS Module Series M35 User Manual 3.1. Pin of Module 3.1.1. Pin Assignment AGND SIM_GND MIC2P SIM1_CLK SIM1_DATA MIC2N MIC1P SIM1_RST MIC1N SIM1_VDD Top view 26 RI/PCM_CLK SPK1N 25 DCD/SIM2_RST SPK1P 24 RTS LOUDSPKN 23 CTS LOUDSPKP 22 TXD PWRKEY 10...

  • Page 20: Pin Description

    GSM/GPRS Module Series M35 User Manual 3.1.2. Pin Description Table 3: Pin Description Power Supply PIN NAME PIN NO. I/O DESCRIPTION COMMENT CHARACTERISTICS Make sure that supply sufficient Main power supply of Vmax=4.6V current in a VBAT 33, 34 module: Vmin=3.3V...
  • Page 21 GSM/GPRS Module Series M35 User Manual PIN NAME PIN NO. I/O DESCRIPTION COMMENT CHARACTERISTICS Emergency off. Pulled Open down for at least 40ms, drain/collector which will turn off the driver required in VILmax=0.45V EMERG_ module in case of cellular device VIHmin=1.35V...
  • Page 22 GSM/GPRS Module Series M35 User Manual Network Status Indicator PIN NAME PIN NO. I/O DESCRIPTION COMMENT CHARACTERISTICS VOHmin= Network status 0.85×VDD_EXT If unused, keep NETLIGHT indication VOLmax= this pin open. 0.15×VDD_EXT UART Port PIN NAME PIN NO. I/O DESCRIPTION COMMENT...
  • Page 23 GSM/GPRS Module Series M35 User Manual VOLmax= pad to SIM card SIM1_ 0.15×SIM1_VDD holder. SIM1 data DATA VOHmin= 0.85×SIM1_VDD VOLmax= SIM1_ 0.15×SIM1_VDD SIM1 reset VOHmin= 0.85×SIM1_VDD VILmin=0V VILmax= 0.25×VDD_EXT SIM1_ SIM1 card detection. VIHmin= PRESENCE 0.75×VDD_EXT VIHmax= VDD_EXT+0.2 SIM_ SIM ground...

  • Page 24: Operating Modes

    GSM/GPRS Module Series M35 User Manual VILmin=-0.3V The default PCM_ VILmax= function is PCM sync signal SYNC 0.25×VDD_EXT STATUS after VIHmin= startup. 0.75×VDD_EXT The default PCM_ VIHmax= PCM clock signal function is RI after VDD_EXT+0.2 startup. VOHmin= PCM_ PCM serial data output 0.85×VDD_EXT...
  • Page 25 GSM/GPRS Module Series M35 User Manual Sleep Mode, the module can still receive paging message and SMS from the system normally. Software is active. The module has registered to the GSM GSM IDLE network, and the module is ready to send and receive GSM data.

  • Page 26: Power Supply

    For M35 module, the max current consumption could reach to 1.6A during a transmit burst. It will cause a large voltage drop on the VBAT. In order to ensure stable operation of the module, it is recommended that the max voltage drop during the transmit burst does not exceed 400mV.

  • Page 27: Reference Design For Power Supply

    GSM/GPRS Module Series M35 User Manual VBAT 100uF 100nF 10pF 33pF 0603 0603 Figure 4: Reference Circuit for the VBAT Input 3.3.3. Reference Design for Power Supply The power design for the module is very important, since the performance of power supply for the module largely depends on the power source.

  • Page 28: Monitor Power Supply

    Figure 6: Turn On the Module with an Open-collector Driver NOTE 1. M35 module is set to autobauding mode (AT+IPR=0) by default. In the autobauding mode, URC ―RDY‖ is not reported to the host controller after module is powered on. When the module is powered on after a delay of 4 or 5 seconds, it can receive AT command.

  • Page 29: Figure 7: Turn On The Module With A Button

    GSM/GPRS Module Series M35 User Manual these configurations, the URC ―RDY‖ would be received from the UART Port of the module every time when the module is powered on. For more details, refer to the section ―AT+IPR‖ in document [1].

  • Page 30: Power Down

    GSM/GPRS Module Series M35 User Manual NOTE 1. Make sure that VBAT is stable before pulling down PWRKEY pin. The time of T is recommended as 100ms. 2. EMERG_OFF should be floated when it is unused. 3. For more details about the application of STATUS pin, please refer to the Chapter 3.13.

  • Page 31: Power Down Module Using At Command

    GSM/GPRS Module Series M35 User Manual Before the completion of the power down procedure, the module sends out the result code shown below: NORMAL POWER DOWN NOTE 1. This result code does not appear when autobauding is active and DTE and DCE are not correctly synchronized after start-up.

  • Page 32: Emergency Shutdown Using Emerg_Off Pin

    GSM/GPRS Module Series M35 User Manual The normal input voltage range is from 3.3V to 4.6V. If the voltage is >4.6V or <3.3V, the module would automatically shut down itself. If the voltage is <3.3V, the following URC will be presented: UNDER_VOLTAGE POWER DOWN If the voltage is >4.6V, the following URC will be presented:...

  • Page 33: Restart

    GSM/GPRS Module Series M35 User Manual EMERG_OFF TVS2 Close to S2 Figure 11: Reference Circuit for EMERG_OFF by Using Button Be cautious to use the pin EMERG_OFF. It should only be used under emergent situation. For instance, if the module is unresponsive or abnormal, the pin EMERG_OFF could be used to shut down the system.

  • Page 34: Power Saving

    GSM/GPRS Module Series M35 User Manual The module can also be restarted by the PWRKEY after emergency shutdown. Pulldown >40ms Delay >500ms EMERG_OFF (INPUT) STATUS (OUTPUT) PWRKEY (INPUT) Figure 13: Timing of Restarting System after Emergency Shutdown NOTE For more details about the application of STATUS pin, please refer to the Chapter 3.13.

  • Page 35: Sleep Mode

    GSM/GPRS Module Series M35 User Manual If the module is set to minimum functionality by ―AT+CFUN=0‖, the RF function and SIM card function would be disabled. In this case, the UART port is still accessible, but all AT commands related with RF function or SIM card function will be not available.

  • Page 36: Summary Of State Transition

    GSM/GPRS Module Series M35 User Manual 3.5.4. Summary of State Transition Table 6: Summary of State Transition Next Mode Current Mode Power Down Normal Mode Sleep Mode Power Down Use PWRKEY Use AT command AT+QPOWD, use PWRKEY ―AT+QSCLK=1‖ and pull...

  • Page 37: Figure 14: Vrtc Is Supplied By A Non-Chargeable Battery

    GSM/GPRS Module Series M35 User Manual Module Core Power Supply VBAT LDO/DCDC 1.5K VRTC Non-chargeable Backup Battery Figure 14: VRTC Is Supplied by a Non-chargeable Battery Module Core Power Supply VBAT LDO/DCDC 1.5K VRTC Rechargeable Backup Battery Figure 15: VRTC Is Supplied by a Rechargeable Battery...

  • Page 38: Serial Interfaces

    GSM/GPRS Module Series M35 User Manual For the choice of a rechargeable or non-chargeable coin-cell battery, please visit http://www.sii.co.jp/en/. NOTE If the module is only powered by VRTC , the real time will have an error about 5 minutes a day. If you want to keep an accurate real time, please use VBAT to supply the RTC core.

  • Page 39: Table 7: Logic Levels Of The Uart Interfaces

    GSM/GPRS Module Series M35 User Manual The logic levels are described in the following table. Table 7: Logic Levels of the UART Interfaces Parameter Min. Max. Unit 0.25×VDD_EXT 0.75×VDD_EXT VDD_EXT +0.2 0.15×VDD_EXT 0.85×VDD_EXT VDD_EXT Table 8: Pin Definition of the UART Interfaces Interfaces Pin No.

  • Page 40: Uart Port

    GSM/GPRS Module Series M35 User Manual 3.7.1. UART Port 3.7.1.1. The Features of UART Port  Seven lines on UART interface.  Contain data lines TXD and RXD, hardware flow control lines RTS and CTS, other control lines DTR, DCD and RI.

  • Page 41: The Connection Of Uart

    GSM/GPRS Module Series M35 User Manual  If autobauding is active it is not recommended to switch to multiplex mode. NOTE To assure reliable communication and avoid any problems caused by undetermined baud rate between DCE and DTE, it is strongly recommended to configure a fixed baud rate and save it instead of using autobauding after start-up.

  • Page 42: Figure 18: Reference Design For Uart Port

    GSM/GPRS Module Series M35 User Manual Three-line connection is shown as below. Module (DCE) Host (DTE) Controller UART port Figure 18: Reference Design for UART Port UART Port with hardware flow control is shown as below. This connection will enhance the reliability of the mass data communication.

  • Page 43: Firmware Upgrade

    GSM/GPRS Module Series M35 User Manual 3.7.1.3. Firmware Upgrade The TXD, RXD can be used to upgrade firmware. The PWRKEY pin must be pulled down before firmware upgrade. The reference circuit is shown as below: Module (DCE) IO Connector UART port...

  • Page 44: Uart Application

    GSM/GPRS Module Series M35 User Manual The reference design for Debug Port is shown as below. Module Peripheral DBG_TXD DBG_RXD Figure 21: Reference Design for Debug Port 3.7.3. UART Application The reference design of 3.3V level match is shown as below. If the host is a 3V system, please change the 5.6K resistor to 10K.

  • Page 45: Audio Interfaces

    GSM/GPRS Module Series M35 User Manual The following circuit shows a reference design for the communication between module and PC. Since the electrical level of module is 2.8V, so a RS-232 level shifter must be used. Note that you should assure the IO voltage of level shifter which connects to module is 2.8V.

  • Page 46: Table 10: Aout2 Output Characteristics

    GSM/GPRS Module Series M35 User Manual MIC2P Channel 2 Microphone positive input MIC2N Channel 2 Microphone negative input LOUDSPKP Channel 2 Audio positive output LOUDSPKN Channel 2 Audio negative output AIN1 and AIN2 can be used for input of microphone and line. An electret microphone is usually used.

  • Page 47: Decrease Tdd Noise And Other Noise

    GSM/GPRS Module Series M35 User Manual 3.8.1. Decrease TDD Noise and Other Noise The 33pF capacitor is applied for filtering out 900MHz RF interference when the module is transmitting at EGSM900MHz. Without placing this capacitor, TDD noise could be heard. Moreover, the 10pF capacitor here is for filtering out 1800MHz RF interference.

  • Page 48: Receiver Interface Design

    GSM/GPRS Module Series M35 User Manual 3.8.3. Receiver Interface Design Close to speaker 10pF 33pF 0603 Differential layout 0603 Module SPK1P 33pF 10pF 0603 0603 SPK1N 10pF 33pF 0603 0603 Figure 25: Reference Interface Design of AOUT1 3.8.4. Earphone Interface Design...

  • Page 49: Loud Speaker Interface Design

    GSM/GPRS Module Series M35 User Manual 3.8.5. Loud Speaker Interface Design Close to Speaker Differential layout 33pF 10pF 0603 0603 LOUDSPKP Module 10pF 33pF 0603 0603 LOUDSPKN 8 ohm 10pF 33pF 0603 0603 Figure 27: Loud Speaker Interface Design 3.8.6. Audio Characteristics...

  • Page 50: Pcm Interface

    The whole procedure of Pulse-code modulation contains sampling, quantizing and encoding. M35 supports PCM interface. It is used for digital audio transmission between the module and the device. This interface is composed of PCM_CLK, PCM_SYNC, PCM_IN and PCM_OUT signal lines.

  • Page 51: Configuration

    3.9.1. Configuration M35 module supports 13-bit line code PCM format. The sample rate is 8 KHz, and the clock source is 256 KHz, and the module can only act as master mode. The PCM interface supports both long and short synchronization simultaneously.

  • Page 52: Figure 28: Long Synchronization & Sign Extension Diagram

    GSM/GPRS Module Series M35 User Manual PCM_CLK PCM_SYNC Sign 12 11 10 PCM_OUT extension Sign PCM_IN 12 11 10 9 extension Figure 28: Long Synchronization & Sign Extension Diagram PCM_CLK PCM_SYNC PCM_OUT 12 11 10 9 Zero padding PCM_IN 12 11 10 9 Zero padding Figure 29: Long Synchronization &...

  • Page 53: Reference Design

    PCM_IN 12 11 10 Zero padding Figure 31: Short Synchronization & Zero Padding Diagram 3.9.3. Reference Design M35 can only work as a master, providing synchronization and clock source. The reference design is shown as below. Peripheral Module (Slave) (Master)

  • Page 54: Sim Card Interfaces

    GSM/GPRS Module Series M35 User Manual Table 15: QPCMON Command Description Parameter Scope Description 0: Close PCM Mode 1: Open PCM 2: Open PCM when audio talk is set up 0: Short synchronization Sync_Type 1: Long synchronization Sync_Length Programmed from one bit to eight bit...

  • Page 55: Table 17: Pin Definition Of The Sim Interfaces

    GSM/GPRS Module Series M35 User Manual The SIM interfaces are powered by an internal regulator in the module. Both 1.8V and 3.0V SIM Cards are supported. Table 17: Pin Definition of the SIM Interfaces Alternate Pin NO. Name Description Function Supply power for SIM1 card.

  • Page 56: Figure 33: Reference Circuit For Sim1 Interface With 8-Pin Sim Card Holder

    GSM/GPRS Module Series M35 User Manual The following figure is the reference design for SIM1 interface. VDD_EXT SIM_GND 100nF SIM_Holder SIM1_VDD SIM1_RST Module SIM1_CLK SIM1_PRESENCE SIM1_DATA 33pF 33pF33pF 33pF Figure 33: Reference Circuit for SIM1 Interface with 8-pin SIM Card Holder If SIM1 card detection function is not used, keep SIM1_PRESENCE pin open.

  • Page 57: Figure 35: Reference Circuit For Sim2 Interface With The 6-Pin Sim Card Holder

    GSM/GPRS Module Series M35 User Manual The following figure is the reference design for SIM2 interface with the 6-pin SIM card holder. SIM_GND 100nF SIM_Holder SIM2_VDD SIM2_RST Module SIM2_CLK SIM2_DATA 33pF33pF 33pF 33pF Figure 35: Reference Circuit for SIM2 Interface with the 6-pin SIM Card Holder...

  • Page 58: Behaviors Of The Ri

    GSM/GPRS Module Series M35 User Manual 3.11. Behaviors of The RI When using PCM interface, RI pin can be used as PCM_CLK. Table 18: Behaviors of the RI State RI Response Standby HIGH Change to LOW, then: 1. Change to HIGH when call is established.

  • Page 59: Network Status Indication

    GSM/GPRS Module Series M35 User Manual HIGH Idle Calling Talking Idle On-hook Figure 37: RI Behavior as a Caller 120ms HIGH Idle or URC or Talking SMS received Figure 38: RI Behavior of URC or SMS Received 3.12. Network Status Indication The NETLIGHT signal can be used to drive a network status indicator LED.

  • Page 60: Operating Status Indication

    GSM/GPRS Module Series M35 User Manual A reference circuit is shown as below. VBAT Module 300R 4.7K NETLIGHT Figure 39: Reference Design for NETLIGHT 3.13. Operating Status Indication The STATUS pin will output a high level after the module being turned on. but it is not recommended connecting this pin to a MCU’s GPIO to judge whether the module is turn-on or not.

  • Page 61: Figure 40: Reference Design For Status

    GSM/GPRS Module Series M35 User Manual VBAT Module 300R 4.7K STATUS Figure 40: Reference Design for STATUS M35_User_Manual Confidential / Released 60 / 85...

  • Page 62: Antenna Interface

    M35 provides an RF antenna pad for antenna connection. The RF trace in host PCB connected to the module RF antenna pad should be coplanar waveguide line or microstrip line, whose characteristic impedance should be close to 50Ω. M35 comes with grounding pads which are next to the antenna pad in M35_User_Manual...

  • Page 63: Rf Output Power

    GSM/GPRS Module Series M35 User Manual order to give a better grounding. Besides, a π-type match circuit is suggested to be used to adjust the RF performance. 4.2. RF Output Power Table 22: The Module Conducted RF Output Power Frequency Max.

  • Page 64: Operating Frequencies

    GSM/GPRS Module Series M35 User Manual 4.4. Operating Frequencies Table 24: The Module Operating Frequencies Frequency Receive Transmit ARFCH GSM850 869~894MHz 824~849MHz 128~251 EGSM900 925~960MHz 880~915MHz 0~124, 975~1023 DCS1800 1805~1880MHz 1710~1785MHz 512~885 PCS1900 1930~1990MHz 1850~1910MHz 512~810 4.5. Antenna Requirement The following table shows the requirement on GSM antenna.

  • Page 65: Rf Cable Soldering

    GSM/GPRS Module Series M35 User Manual 4.6. RF Cable Soldering Soldering the RF cable to RF pad of module correctly will reduce the loss on the path of RF, please refer to the following example of RF soldering. Figure 42: RF Soldering Sample...

  • Page 66: Electrical, Reliability And Radio Characteristics

    GSM/GPRS Module Series M35 User Manual Electrical, Reliability Radio Characteristics 5.1. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of module are listed in the following table: Table 27: Absolute Maximum Ratings Parameter Min.

  • Page 67: Power Supply Ratings

    GSM/GPRS Module Series M35 User Manual ℃ Restricted Operation -40 ~ -35 +80 ~ +85 ℃ Storage Temperature NOTE When the module works within this temperature range, the deviation from the GSM specification may occur. For example, the frequency error or the phase error will be increased.

  • Page 68: Current Consumption

    GSM/GPRS Module Series M35 User Manual DATA mode, GPRS (4Rx,1Tx) GSM850/EGSM900 217/234 DCS1800/PCS1900 172/170 DATA mode, GPRS (1Rx,4Tx) GSM850/EGSM900 458/485 DCS1800/PCS1900 462/439 Peak supply current (during Maximum power control level transmission on GSM850 and EGSM900. slot) NOTE Power control level PCL 5.

  • Page 69: Electro-Static Discharge

    GSM/GPRS Module Series M35 User Manual DATA Mode, GPRS ( 3 Rx, 2Tx ) CLASS 10 @power level #5 <550mA, Typical 363mA GSM850 @power level #12, Typical 131mA @power level #19, Typical 91mA @power level #5 <550mA, Typical 393mA EGSM900...

  • Page 70: Table 31: The Esd Endurance (Temperature: 25º C, Humidity: 45%)

    GSM/GPRS Module Series M35 User Manual Table 31: The ESD Endurance (Temperature: 25º C, Humidity: 45%) Tested Point Contact Discharge Air Discharge VBAT,GND ± 5KV ± 10KV RF_ANT ± 5KV ± 10KV TXD, RXD ± 2KV ± 4KV Others ± 0.5KV ±...

  • Page 71: Mechanical Dimensions

    GSM/GPRS Module Series M35 User Manual Mechanical Dimensions This chapter describes the mechanical dimensions of the module. 6.1. Mechanical Dimensions of Module Figure 43: M35 Module Top and Side Dimensions (Unit: mm) M35_User_Manual Confidential / Released 70 / 85...

  • Page 72: Figure 44: M35 Module Bottom Dimensions (Unit: Mm)

    GSM/GPRS Module Series M35 User Manual Figure 44: M35 Module Bottom Dimensions (Unit: mm) M35_User_Manual Confidential / Released 71 / 85...

  • Page 73: Recommended Footprint

    GSM/GPRS Module Series M35 User Manual 6.2. Recommended Footprint frame line frame line Silksreen Silksreen Figure 45: Recommended Footprint (Unit: mm) NOTE The module should keep about 3mm away from other components in the host PCB. M35_User_Manual Confidential / Released...

  • Page 74: Top View Of The Module

    GSM/GPRS Module Series M35 User Manual 6.3. Top View of the Module Figure 46: Top View of the Module 6.4. Bottom View of the Module Figure 47: Bottom View of the Module M35_User_Manual Confidential / Released 73 / 85...

  • Page 75: Storage And Manufacturing

    7.1. Storage M35 module is distributed in a vacuum-sealed bag. The restriction for storage is shown as below. Shelf life in the vacuum-sealed bag: 12 months at environments of <40º C temperature and <90%RH. After the vacuum-sealed bag is opened, devices that need to be mounted directly must be: ...

  • Page 76: Packaging

    To ensure the module soldering quality, the thickness of stencil at the hole of the module pads should be 0.2 mm for M35. For more details, please refer to document [5]. It is suggested that peak reflow temperature is from 235º C to 245º C (for SnAg3.0Cu0.5 alloy). Absolute max reflow temperature is 260º...

  • Page 77: Figure 49: Tape And Reel Specification

    GSM/GPRS Module Series M35 User Manual Figure 49: Tape and Reel Specification M35_User_Manual Confidential / Released 76 / 85...

  • Page 78: Table 32: Reel Packing

    GSM/GPRS Module Series M35 User Manual DETAIL:A DETAIL:A Figure 50: Dimensions of Reel Table 32: Reel Packing Model Name MOQ for MP Minimum Package: 250pcs Minimum Package×4=1000pcs Size: 370 × 350 × 56mm Size: 380 × 250 × 365mm 250pcs N.W: 0.63kg...

  • Page 79: Appendix A Reference

    UART port application note GSM_EVB_User_Guide GSM EVB user guide Module_Secondary_SMT_User_Guide Module secondary SMT user guide M35_Dual_SIM_Application_Notes_V3.0 M35 Dual SIM Application Notes GSM_Multi_UART_Application_Note M35 Multi UART Application Notes Quectel_GSM_Module_Digital_IO_Application_Note GSM module digital IO application note Digital cellular telecommunications (Phase GSM 07.07 2+);...

  • Page 80: Table 34: Terms And Abbreviations

    GSM/GPRS Module Series M35 User Manual Digital cellular telecommunications (Phase [14] GSM 03.38 2+); Alphabets language-specific information Digital cellular telecommunications (Phase 2); Mobile Station (MS) conformance [15] GSM 11.10 specification; Part Conformance specification Table 34: Terms and Abbreviations Abbreviation Description...
  • Page 81 GSM/GPRS Module Series M35 User Manual Enhanced Full Rate EGSM Enhanced GSM Electromagnetic Compatibility Electrostatic Discharge European Telecommunication Standard Federal Communications Commission (U.S.) FDMA Frequency Division Multiple Access Full Rate GMSK Gaussian Minimum Shift Keying GPRS General Packet Radio Service...
  • Page 82 GSM/GPRS Module Series M35 User Manual Mobile Terminated Net Weight Password Authentication Protocol PBCCH Packet Switched Broadcast Control Channel Printed Circuit Board Protocol Data Unit Point-to-Point Protocol Radio Frequency Root Mean Square (value) Real Time Clock Receive Direction Subscriber Identification Module...
  • Page 83 GSM/GPRS Module Series M35 User Manual VILmax Maximum Input Low Level Voltage Value VILmin Minimum Input Low Level Voltage Value VImax Absolute Maximum Input Voltage Value VImin Absolute Minimum Input Voltage Value VOHmax Maximum Output High Level Voltage Value VOHmin...

  • Page 84: Appendix B Gprs Coding Scheme

    GSM/GPRS Module Series M35 User Manual Appendix B GPRS Coding Sche Four coding schemes are used in GPRS protocol. The differences between them are shown in the following table. Table 35: Description of Different Coding Schemes Radio Block Data Code...

  • Page 85: Figure 52: Radio Block Structure Of Cs-4

    GSM/GPRS Module Series M35 User Manual Radio block structure of CS-4 is shown as the following figure. Radio Block Block No coding Code 456 bits Figure 52: Radio Block Structure of CS-4 M35_User_Manual Confidential / Released 84 / 85...

  • Page 86: Appendix C Gprs Multi-Slot Class

    GSM/GPRS Module Series M35 User Manual Appendix C GPRS Multi-slot Class Twenty-nine classes of GPRS multi-slot modes are defined for MS in GPRS specification. Multi-slot classes are product dependant, and determine the maximum achievable data rates in both the uplink and downlink directions.

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