M35 User Manual GSM/GPRS Module Series Rev. M35_User_Manual_V3.1 Date: 2014-11-26 www.quectel.
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GSM/GPRS Module Series M35 User Manual About the Document History Revision Date Author Description 1.0 2011-12-29 Luka WU Initial 1. 1.1 2012-05-18 2. Luka WU 3. 4. 1.2 2012-09-19 1. 2. 3. Luka WU Added current consumption in GPRS communication mode. Modified AT command AT+QAUDCH in Chapter 3.10. Modified the Footprint of recommendation. Updated module package type. 4. 5. Updated module functional diagram. Updated Voltage ripple during transmitting.
GSM/GPRS Module Series M35 User Manual 5. 6. 7. 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.
GSM/GPRS Module Series M35 User Manual Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 4 Table Index .......................................................................................................................................
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 .......................................................................
GSM/GPRS Module Series M35 User Manual 7.1. 7.2. 7.3. Storage .................................................................................................................................. 74 Soldering ............................................................................................................................... 74 Packaging .............................................................................................................................. 75 7.3.1. Tape and Reel Packaging ..
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 ...................................
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 ..............................................................................
GSM/GPRS Module Series 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) ..............................................
GSM/GPRS Module Series M35 User Manual 1 Introduction This document defines the M35 module and describes its hardware interface which are connected with your application and the air interface. 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.
GSM/GPRS Module Series M35 User Manual 1.1. Safety Information The following safety precautions must be observed during all phases of the operation, such as usage, service or repair of any cellular terminal or mobile incorporating M35 module. Manufacturers of the cellular terminal should send the following safety information to users and operating personnel and to incorporate these guidelines into all manuals supplied with the product.
GSM/GPRS Module Series M35 User Manual 2 Product Concept 2.1. General Description M35 is a Quad-band GSM/GPRS engine that works at frequencies of GSM850MHz, EGSM900, DCS1800 and PCS1900MHz. The M35 features GPRS multi-slot class 12 and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4. For more details about GPRS multi-slot classes and coding schemes, please refer to the Appendix B & C. With a tiny profile of 19.9mm × 23.6mm × 2.
GSM/GPRS Module Series M35 User Manual module usage. This module should NOT be installed and operating simultaneously with other radio. 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.
GSM/GPRS Module Series M35 User Manual Power Supply Single supply voltage: 3.3V ~ 4.6V Typical supply voltage: 4V Power Saving Typical power consumption in SLEEP mode: 1.3 mA @DRX=5 1.
GSM/GPRS Module Series M35 User Manual Support autobauding from 4800bps to 115200bps Debug Port: Two lines on debug port interface DBG_TXD and DBG_RXD Debug Port can used for firmware debugging Phonebook Management Support phonebook types: SM, ME, FD, ON, MT SIM Application Toolkit Support SAT class 3, GSM 11.14 Release 99 Real Time Clock Supported Physical Characteristics Size: 19.9±0.15 × 23.6±0.15 × 2.65±0.2mm Weight: Approx. 2.
GSM/GPRS Module Series M35 User Manual —Turn-on/off interface —UART interfaces —RTC interface —Audio interfaces —PCM interface —SIM interfaces —RF interface RF_ANT ESD RF PAM VBAT PMU PWRKEY EMERG_OFF VRTC RF Transceiver 26MHz Reset RTC Serial Interface UART PCM Interface PCM Audio Audio BB&RF SIM Interfaces Status& Netlight SIM Interface GPIO& PWM MEMORY Figure 1: Module Functional Diagram 2.5.
GSM/GPRS Module Series M35 User Manual 3 Application Interface The module adopts LCC package and has 42 pins.
GSM/GPRS Module Series M35 User Manual 3.1. Pin of Module GND RF_ANT GND GND GND GND VBAT VBAT VRTC 3.1.1.
GSM/GPRS Module Series M35 User Manual 3.1.2. Pin Description Table 3: Pin Description Power Supply PIN NAME VBAT VRTC PIN NO. 33, 34 32 VDD_ EXT 19 GND 35,36,3 7,38, 40 I/O I I/O O DC CHARACTERISTICS COMMENT Main power supply of module: VBAT=3.3V~4.6V Vmax=4.6V Vmin=3.3V Vnorm=4.0V Make sure that supply sufficient current in a transmitting burst typically rises to 1.6A. Power supply for RTC when VBAT is not supplied for the system.
GSM/GPRS Module Series M35 User Manual PIN NAME EMERG_ OFF PIN NO. 11 DC CHARACTERISTICS I/O DESCRIPTION COMMENT I Emergency off. Pulled down for at least 40ms, which will turn off the module in case of emergency. Use it only when shutdown via PWRKEY or AT command cannot be achieved. VILmax=0.45V VIHmin=1.35V Vopenmax=1.8V I/O DESCRIPTION DC CHARACTERISTICS COMMENT O Indicate module’s operating status. Output high level when module turns on, while output low level when module turns off.
GSM/GPRS Module Series M35 User Manual Network Status Indicator PIN NAME PIN NO. I/O DESCRIPTION DC CHARACTERISTICS COMMENT If unused, keep this pin open. COMMENT 13 O Network status indication VOHmin= 0.85×VDD_EXT VOLmax= 0.15×VDD_EXT PIN NAME PIN NO.
GSM/GPRS Module Series M35 User Manual SIM1_ DATA SIM1_ RST 29 28 I/O O SIM1 data VOLmax= 0.15×SIM1_VDD VOHmin= 0.85×SIM1_VDD SIM1 reset VOLmax= 0.15×SIM1_VDD VOHmin= 0.85×SIM1_VDD SIM1 card detection. VILmin=0V VILmax= 0.25×VDD_EXT VIHmin= 0.75×VDD_EXT VIHmax= VDD_EXT+0.2 SIM1_ PRESENCE 20 SIM_ GND 31 SIM ground 18 Power supply for SIM2 card The voltage can be selected by software automatically. Either 1.8V or 3V. SIM2 clock VOLmax= 0.15×SIM2_VDD VOHmin= 0.
GSM/GPRS Module Series M35 User Manual PCM_ SYNC 12 O PCM sync signal PCM_ CLK 26 O PCM clock signal PCM_ OUT 41 O PCM serial data output PCM_IN 42 I PCM serial data input VILmin=-0.3V VILmax= 0.25×VDD_EXT VIHmin= 0.75×VDD_EXT VIHmax= VDD_EXT+0.2 VOHmin= 0.85×VDD_EXT VOLmax= 0.15×VDD_EXT The default function is STATUS after startup. The default function is RI after startup. If unused, keep these pins open. Table 4: Multiplexed Functions PIN NAME PIN NO.
GSM/GPRS Module Series M35 User Manual Sleep Mode, the module can still receive paging message and SMS from the system normally. GSM IDLE Software is active. The module has registered to the GSM network, and the module is ready to send and receive GSM data. GSM TALK GSM connection is ongoing. In this mode, the power consumption is decided by the configuration of Power Control Level (PCL), dynamic DTX control and the working RF band. GPRS IDLE The module is not registered to GPRS network.
GSM/GPRS Module Series M35 User Manual 3.3. Power Supply 3.3.1. Power Features of Module The power supply is one of the key issues in designing GSM terminals. Because of the 577us radio burst in GSM every 4.615ms, power supply must be able to deliver high current peaks in a burst period. During these peaks, drops on the supply voltage must not exceed minimum working voltage of module. For M35 module, the max current consumption could reach to 1.6A during a transmit burst.
GSM/GPRS Module Series M35 User Manual VBAT + C1 100uF C2 100nF C3 C4 10pF 33pF 0603 0603 GND 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. The power supply is capable of providing the sufficient current up to 2A at least.
GSM/GPRS Module Series M35 User Manual NOTE It is suggested to control the module’s main power supply (VBAT) via LDO enable pin to restart the module when the module has become abnormal. Power switch circuit like P-channel MOSFET switch circuit can also be used to control VBAT. 3.3.4. Monitor Power Supply The command ―AT+CBC‖ can be used to monitor the supply voltage of the module. The unit of the displayed voltage is mV. For details, please refer to the document [1]. 3.4. Power On and Down Scenarios 3.
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]. 2. AT command response indicates module is turned on successfully, or else the module fails to be turned on. The other way to control the PWRKEY is through a button directly. A TVS component is indispensable to be placed nearby the button for ESD protection.
GSM/GPRS Module Series M35 User Manual NOTE 1. Make sure that VBAT is stable before pulling down PWRKEY pin. The time of T1 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. 3.4.2. Power Down The following procedures can be used to turn off the module: Normal power down procedure: Turn off module using the PWRKEY pin.
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. The module is recommended to set a fixed baud rate. 2.
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: OVER_VOLTAGE POWER DOWN After that moment, no further AT commands can be executed. The module logs off from network and enters power down mode, and only RTC is still active. NOTE 1.
GSM/GPRS Module Series M35 User Manual S2 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.
GSM/GPRS Module Series M35 User Manual The module can also be restarted by the PWRKEY after emergency shutdown. EMERG_OFF (INPUT) Pulldown >40ms Delay >500ms 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. 3.5. Power Saving Based on system requirements, there are several actions to drive the module to enter low current consumption status.
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. If the module has been set by the command with ―AT+CFUN=4‖, the RF function will be disabled, but the UART port is still active. In this case, all AT commands related with RF function will be not available.
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 Power Down Sleep Mode Use PWRKEY Normal Mode AT+QPOWD, use PWRKEY pin, or use EMERG_OFF pin SLEEP Mode Use PWRKEY pin, or use EMERG_OFF pin Use AT command ―AT+QSCLK=1‖ and pull DTR up Pull DTR down or incoming voice call or SMS or data call 3.6. RTC Backup The RTC (Real Time Clock) function is supported.
GSM/GPRS Module Series M35 User Manual Module RTC Core Power Supply LDO/DCDC VBAT LDO 1.5K VRTC Non-chargeable Backup Battery Figure 14: VRTC Is Supplied by a Non-chargeable Battery Module RTC Core Power Supply LDO/DCDC VBAT LDO VRTC 1.5K Rechargeable Backup Battery Figure 15: VRTC Is Supplied by a Rechargeable Battery Module RTC Core Power Supply LDO/DCDC VBAT VRTC LDO 1.
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. 3.7. Serial Interfaces The module provides two serial ports: UART Port and Debug Port.
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 VIL 0 0.25×VDD_EXT V VIH 0.75×VDD_EXT VDD_EXT +0.2 V VOL 0 0.15×VDD_EXT V VOH 0.85×VDD_EXT VDD_EXT V Table 8: Pin Definition of the UART Interfaces Interfaces Pin No.
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. Used for AT command, GPRS data, etc. Multiplexing function is supported on the UART Port. So far only the basic mode of multiplexing is available.
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. For more details, please refer to the Section ―AT+IPR‖ in document [1]. 3.7.1.2.
GSM/GPRS Module Series M35 User Manual Three-line connection is shown as below. Module (DCE) UART port Host (DTE) Controller TXD TXD RXD RXD GND RTS GND 0R 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.
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 TXD TXD RXD RXD GND PWRKEY GND PWRKEY Figure 20: Reference Design for Firmware Upgrade NOTE The firmware of module might need to be upgraded due to certain reasons. It is recommended to reserve these pins in the host board for firmware upgrade. 3.7.
GSM/GPRS Module Series M35 User Manual The reference design for Debug Port is shown as below. Module Peripheral DBG_TXD TXD DBG_RXD RXD GND GND 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. Module Peripheral /TXD /RXD /RTS /CTS GPIO EINT GPIO 1K RXD 1K TXD 1K RTS 1K CTS 1K DTR 1K RI 1K DCD GND GND 5.6K 5.6K 5.6K Voltage level:3.
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. C1+ Module 1K DCD 1K CTS 1K RI 1K 1K DTR 1K RTS C1- GND GND C2+ VCC C2- V- 3.3V GND T2OUT T2IN T1OUT T3IN T5OUT T4IN T3OUT T5IN T4OUT 6 7 /R1OUT 5.
GSM/GPRS Module Series M35 User Manual MIC2P 2 Channel 2 Microphone positive input MIC2N 3 Channel 2 Microphone negative input LOUDSPKP 9 Channel 2 Audio positive output LOUDSPKN 8 Channel 2 Audio negative output AIN1 and AIN2 can be used for input of microphone and line. An electret microphone is usually used. AIN1 and AIN2 are both differential input channels. AOUT1 is used for output of the receiver. This channel is typically used for a receiver built into a handset.
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. However, the resonant frequency point of a capacitor largely depends on the material and production technique.
GSM/GPRS Module Series M35 User Manual 3.8.3. Receiver Interface Design Close to speaker GND Differential layout 10pF 0603 33pF 0603 10pF 0603 33pF 0603 10pF 0603 33pF 0603 ESD Module SPK1P SPK1N ESD GND Figure 25: Reference Interface Design of AOUT1 3.8.4. Earphone Interface Design Close to Module Close to Socket GND MIC2N Module MIC2P 10pF 0603 33pF 0603 10pF 0603 33pF 0603 10pF 0603 33pF 0603 GND Differential layout GND GND 4.
GSM/GPRS Module Series M35 User Manual 3.8.5. Loud Speaker Interface Design Close to Speaker GND Differential layout GND GND ESD 33pF 0603 10pF 0603 0R LOUDSPKP Module 10pF 0603 33pF 0603 0R LOUDSPKN 8 ohm 33pF 0603 10pF 0603 ESD GND GND GND Figure 27: Loud Speaker Interface Design 3.8.6. Audio Characteristics Table 11: Typical Electret Microphone Characteristics Parameter Min. Typ. Max. Unit Working Voltage 1.2 1.5 2.
GSM/GPRS Module Series M35 User Manual Ref level 0 Load resistance 4.8 Vpp 8 Load Resistance Differential Reference level AOUT2 Output 0 Load resistance 2×VBAT 8 Vpp Load Resistance Single-ended Reference level 0 VBAT Vpp 3.9. PCM Interface Pulse-code modulation (PCM) is a converter that changes the consecutive analog audio signal to discrete digital signal. The whole procedure of Pulse-code modulation contains sampling, quantizing and encoding. M35 supports PCM interface.
GSM/GPRS Module Series M35 User Manual 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. Furthermore, it only supports MSB first. For detailed information, please refer to the table below.
GSM/GPRS Module Series M35 User Manual PCM_CLK PCM_SYNC MSB PCM_OUT Sign extension 12 11 10 9 8 7 6 5 4 3 2 1 0 12 11 10 9 8 7 6 5 4 3 2 1 0 MSB PCM_IN Sign extension Figure 28: Long Synchronization & Sign Extension Diagram PCM_CLK PCM_SYNC MSB PCM_OUT 12 11 10 9 8 7 6 5 4 3 2 1 0 Zero padding 8 7 6 5 4 3 2 1 0 Zero padding MSB PCM_IN 12 11 10 9 Figure 29: Long Synchronization & Zero Padding Diagram PCM_CLK PCM_SYNC MSB PCM_OUT Sign extension 12 11 10
GSM/GPRS Module Series M35 User Manual PCM_CLK PCM_SYNC MSB PCM_OUT 12 11 10 9 8 7 6 5 4 3 2 1 0 Zero padding 9 8 7 6 5 4 3 2 1 0 Zero padding MSB PCM_IN 12 11 10 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.
GSM/GPRS Module Series M35 User Manual Table 15: QPCMON Command Description Parameter Scope Description Mode 0~2 0: Close PCM 1: Open PCM 2: Open PCM when audio talk is set up Sync_Type 0~1 0: Short synchronization 1: Long synchronization Sync_Length 1~8 Programmed from one bit to eight bit SignExtension 0~1 0: Zero padding 1: Sign extension MSBFirst 0~1 0: MSB first 1: Not support ―AT+QPCMVOL‖ can configure the volume of input and output.
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 1) Pin NO. Name Description 27 SIM1_VDD Supply power for SIM1 card. Automatic detection of SIM1 card voltage. 3.0V±5% and 1.8V±5%. Maximum supply current is around 10mA. 30 SIM1_CLK SIM1 card clock. 29 SIM1_DATA SIM1 card data I/O. 28 SIM1_RST SIM1 card reset.
GSM/GPRS Module Series M35 User Manual The following figure is the reference design for SIM1 interface. VDD_EXT 10K SIM_GND Module 100nF SIM1_VDD SIM1_RST SIM1_CLK SIM1_PRESENCE SIM1_DATA SIM_Holder VCC RST 22R 22R CLK GND VPP IO 22R GND 33pF 33pF33pF33pF TVS GND GND 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.
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 Module 100nF SIM2_VDD SIM2_RST SIM2_CLK SIM2_DATA SIM_Holder VCC RST CLK 22R 22R GND VPP IO 22R 33pF33pF 33pF 33pF TVS GND GND Figure 35: Reference Circuit for SIM2 Interface with the 6-pin SIM Card Holder For more information http://www.molex.com. of SIM card holder, you can visit http://www.amphenol.
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 Voice Calling Change to LOW, then: 1. Change to HIGH when call is established. 2. Use ATH to hang up the call, RI changes to HIGH. 3. Calling part hangs up, RI changes to HIGH first, and changes to LOW for 120ms indicating ―NO CARRIER‖ as an URC, then changes to HIGH again. 4. Change to HIGH when SMS is received.
GSM/GPRS Module Series M35 User Manual HIGH RI LOW Idle Calling Talking On-hook Idle Figure 37: RI Behavior as a Caller HIGH 120ms RI LOW Idle or Talking URC or 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. The working state of this pin is listed in the following table. Table 19: Working State of the NETLIGHT State Module Function Off The module is not running.
GSM/GPRS Module Series M35 User Manual A reference circuit is shown as below. VBAT Module 300R NETLIGHT 4.7K 47K 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. The following LED indicator circuit for STATUS pin can be used to indicate the state after the module has been turned on.
GSM/GPRS Module Series M35 User Manual VBAT Module 300R STATUS 4.
GSM/GPRS Module Series M35 User Manual 4 Antenna Interface The Pin 39 is the RF antenna pad. The RF interface has an impedance of 50Ω. Table 21: Pin Definition of the RF_ANT Name Pin Description GND 37 Ground GND 38 Ground RF_ANT 39 RF antenna pad GND 40 Ground 4.1. RF Reference Design The reference design for RF is shown as below. 0R RF_ANT Module NM NM Figure 41: Reference Design for RF M35 provides an RF antenna pad for antenna connection.
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. Min. GSM850 33dBm±2dB 5dBm±5dB EGSM900 33dBm±2dB 5dBm±5dB DCS1800 30dBm±2dB 0dBm±5dB PCS1900 30dBm±2dB 0dBm±5dB NOTE In GPRS 4 slots TX mode, the max output power is reduced by 2.5dB.
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.
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.
GSM/GPRS Module Series M35 User Manual 5 Electrical, Reliability and 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. Max. Unit VBAT -0.3 +4.73 V Peak Current of Power Supply 0 2 A RMS Current of Power Supply (during one TDMA- frame) 0 0.7 A Voltage at Digital Pins -0.3 3.08 V Voltage at Analog Pins -0.
GSM/GPRS Module Series M35 User Manual Restricted Operation1) -40 ~ -35 +80 ~ +85 ℃ Storage Temperature -45 +90 ℃ NOTE 1) 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. 5.3. Power Supply Ratings Table 29: The Module Power Supply Ratings Parameter VBAT Description Conditions Min. Typ. Max.
GSM/GPRS Module Series M35 User Manual Peak supply current (during transmission slot) DATA mode, GPRS (4Rx,1Tx) GSM850/EGSM9001) DCS1800/PCS19002) 217/234 172/170 mA mA DATA mode, GPRS (1Rx,4Tx) GSM850/EGSM9001) DCS1800/PCS19002) 458/485 462/439 mA mA Maximum power control level on GSM850 and EGSM900. 1.6 2 A NOTE 1. 2. 3. 1) Power control level PCL 5. Power control level PCL 0. Under the EGSM900 spectrum，the power of 1Rx and 4Tx has been reduced. 2) 5.4.
GSM/GPRS Module Series M35 User Manual DATA Mode, GPRS ( 3 Rx, 2Tx ) CLASS 10 GSM850 @power level #5 <550mA, Typical 363mA @power level #12, Typical 131mA @power level #19, Typical 91mA EGSM900 @power level #5 <550mA, Typical 393mA @power level #12, Typical 132mA @power level #19, Typical 92mA DCS1800 @power level #0 <450mA, Typical 268mA @power level #7, Typical 112mA @power level #15, Typical 88mA PCS1900 @power level #0 <450mA, Typical 257mA @power level #7, Typical 119mA @power level #15, Typic
GSM/GPRS Module Series M35 User Manual Table 31: The ESD Endurance (Temperature: 25ºC, Humidity: 45%) Tested Point Contact Discharge Air Discharge VBAT,GND ±5KV ±10KV RF_ANT ±5KV ±10KV TXD, RXD ±2KV ±4KV Others ±0.
GSM/GPRS Module Series M35 User Manual 6 Mechanical Dimensions This chapter describes the mechanical dimensions of the module. 6.1.
GSM/GPRS Module Series M35 User Manual 1 Figure 44: M35 Module Bottom Dimensions (Unit: mm) M35_User_Manual Confidential / Released 71 / 85
GSM/GPRS Module Series M35 User Manual 6.2. Recommended Footprint A frame line frame line Silksreen B A Silksreen B Figure 45: Recommended Footprint (Unit: mm) NOTE The module should keep about 3mm away from other components in the host PCB.
GSM/GPRS Module Series M35 User Manual 6.3. Top View of the Module Figure 46: Top View of the Module 6.4.
GSM/GPRS Module Series M35 User Manual 7 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 <40ºC temperature and <90%RH. After the vacuum-sealed bag is opened, devices that need to be mounted directly must be: Mounted within 72 hours at the factory environment of ≤30ºC temperature and <60% RH. Stored at <10% RH.
GSM/GPRS Module Series M35 User Manual The squeegee should push the paste on the surface of the stencil that makes the paste fill the stencil openings and penetrate to the PCB. The force on the squeegee should be adjusted so as to produce a clean stencil surface on a single pass. 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].
GSM/GPRS Module Series M35 User Manual Figure 49: Tape and Reel Specification M35_User_Manual Confidential / Released 76 / 85
GSM/GPRS Module Series M35 User Manual DETAIL:A 6 PS DETAIL:A Figure 50: Dimensions of Reel Table 32: Reel Packing Model Name M35 MOQ for MP Minimum Package: 250pcs Minimum Package×4=1000pcs 250pcs Size: 370 × 350 × 56mm3 N.W: 0.63kg G.W: 1.47kg Size: 380 × 250 × 365mm3 N.W: 2.5kg G.W: 6.
GSM/GPRS Module Series M35 User Manual 8 Appendix A Reference Table 33: Related Documents SN Document Name Remark [1] Quectel_M35_AT_Commands_Manual AT commands manual [2] ITU-T Draft new recommendation V.25ter Serial asynchronous automatic dialing and control [3] GSM_UART_Application_Note UART port application note [4] GSM_EVB_User_Guide GSM EVB user guide [5] Module_Secondary_SMT_User_Guide Module secondary SMT user guide [6] M35_Dual_SIM_Application_Notes_V3.
GSM/GPRS Module Series M35 User Manual [14] [15] GSM 03.38 Digital cellular telecommunications (Phase 2+); Alphabets and language-specific information GSM 11.
GSM/GPRS Module Series M35 User Manual EFR Enhanced Full Rate EGSM Enhanced GSM EMC Electromagnetic Compatibility ESD Electrostatic Discharge ETS European Telecommunication Standard FCC Federal Communications Commission (U.S.) FDMA Frequency Division Multiple Access FR Full Rate GMSK Gaussian Minimum Shift Keying GPRS General Packet Radio Service GSM Global System for Mobile Communications G.
GSM/GPRS Module Series M35 User Manual MT Mobile Terminated N.
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 Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VOLmin Minimum Output Low Level Voltage Value Phonebook Abbreviations LD SIM Last Dialing phonebook (list of numbers most recently dialed)
GSM/GPRS Module Series M35 User Manual 9 Appendix B GPRS Coding Sche me 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 USF Pre-coded USF Radio Block excl.USF and BCS BCS 1/2 3 3 181 CS-2 2/3 3 6 CS-3 3/4 3 CS-4 1 3 Scheme Code Rate CS-1 Tail Coded Bits Punctured Bits Data Rate Kb/s 40 4 456 0 9.05 268 16 4 588 132 13.4 6 312 16 4 676 220 15.
GSM/GPRS Module Series M35 User Manual Radio block structure of CS-4 is shown as the following figure.
GSM/GPRS Module Series M35 User Manual 10 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. Written as 3+1 or 2+2, the first number indicates the amount of downlink timeslots, while the second number indicates the amount of uplink timeslots.
