Quectel Wireless Solutions 201403GC10 GSM/GPRS Module User Manual Manual

Quectel Wireless Solutions Company Limited GSM/GPRS Module Manual

Manual

    GC10 Hardware Design   GSM/GPRS Module Series   Rev. GC10_Hardware_Design_V2.0   Date: 2014-01-09 www.quectel.com
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                1 / 76       Our  aim  is  to  provide  customers  with  timely  and  comprehensive  service.  For  any assistance, please contact our company headquarters:  Quectel Wireless Solutions Co., Ltd.   Room 501, Building 13, No.99, Tianzhou Road, Shanghai, China, 200233 Tel: +86 21 5108 6236 Mail: info@quectel.com  Or our local office, for more information, please visit:   http://www.quectel.com/support/salesupport.aspx   For technical support, to report documentation errors, please visit:   http://www.quectel.com/support/techsupport.aspx   GENERAL NOTES 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.  ALL  INFORMATION  SUPPLIED HEREIN  ARE  SUBJECT TO CHANGE WITHOUT PRIOR NOTICE.     COPYRIGHT THIS  INFORMATION  CONTAINED  HERE  IS  PROPRIETARY  TECHNICAL  INFORMATION  OF QUECTEL CO., LTD. TRANSMITTABLE, REPRODUCTION, DISSEMINATION AND EDITING OF THIS DOCUMENT  AS  WELL  AS  UTILIZATION  OF  THIS  CONTENTS  ARE  FORBIDDEN  WITHOUT PERMISSION. OFFENDERS WILL BE HELD LIABLE FOR PAYMENT OF DAMAGES. ALL RIGHTS ARE RESERVED IN THE  EVENT OF  A  PATENT  GRANT OR  REGISTRATION OF  A UTILITY  MODEL OR DESIGN.    Copyright © Quectel Wireless Solutions Co., Ltd. 2014. All rights reserved.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                2 / 76      About the Document    History   Revision  Date  Author  Description 1.0  2013-12-09  King HAO  Initial 2.0  2014-01-09  King HAO 1.  Updated Figure 2: Pin assignment.   2.  Modified  the  mechanical  dimensions  and  the recommended footprint of the module in Chapter 6. 3.  Updated SIM card detection function.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                3 / 76      Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ................................................................................................................................................... 5 Figure Index ................................................................................................................................................. 6 1 Introduction .......................................................................................................................................... 8 1.1. Safety Information ................................................................................................................... 8 2 Product Concept ................................................................................................................................ 10 2.1. General Description ............................................................................................................... 10 2.2. Directives and Standards ...................................................................................................... 10 2.2.1. FCC Statement ............................................................................................................... 10 2.2.2. FCC Radiation Exposure Statement .............................................................................. 11 2.3. Key Features ......................................................................................................................... 11 2.4. Functional Diagram ............................................................................................................... 13 2.5. Evaluation Board ................................................................................................................... 14 3 Application Interface ......................................................................................................................... 15 3.1. Pin of Module ......................................................................................................................... 16 3.1.1. Pin Assignment .............................................................................................................. 16 3.1.2. Pin Description ............................................................................................................... 17 3.2. Operating Modes ................................................................................................................... 21 3.3. Power Supply ........................................................................................................................ 22 3.3.1. Power Features of Module ............................................................................................. 22 3.3.2. Decrease Supply Voltage Drop ...................................................................................... 22 3.3.3. Reference Design for Power Supply .............................................................................. 23 3.3.4. Monitor Power Supply .................................................................................................... 24 3.4. Power On and Down Scenarios ............................................................................................ 24 3.4.1. Power On ....................................................................................................................... 24 3.4.2. Power Down ................................................................................................................... 26 3.4.2.1. Power Down Module by the PWRKEY Pin ....................................................... 27 3.4.2.2. Power Down Module by AT Command ............................................................. 28 3.4.2.3. Over-voltage or Under-voltage Automatic Shutdown ........................................ 28 3.4.2.4. Emergency Shutdown by EMERG_OFF Pin .................................................... 29 3.4.3. Restart ............................................................................................................................ 30 3.5. Power Saving Technology ..................................................................................................... 31 3.5.1. Minimum Functionality Mode ......................................................................................... 31 3.5.2. Sleep Mode .................................................................................................................... 31 3.5.3. Wake Up Module from Sleep Mode ............................................................................... 32 3.5.4. Summary of State Transition .......................................................................................... 32 3.6. RTC Backup .......................................................................................................................... 32 3.7. Serial Interfaces ..................................................................................................................... 34 3.7.1. UART Port ...................................................................................................................... 36 3.7.1.1. The Features of UART Port ............................................................................... 36
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                4 / 76      3.7.1.2. The Connection of UART .................................................................................. 37 3.7.2. Debug and Upgrade Port ............................................................................................... 38 3.7.3. UART Application ........................................................................................................... 39 3.8. Audio Interfaces ..................................................................................................................... 41 3.8.1. Decrease TDD Noise and Other Noises ........................................................................ 42 3.8.2. Microphone Interfaces Design ....................................................................................... 43 3.8.3. Receiver Interface Design .............................................................................................. 44 3.8.4. Earphone Interface Design ............................................................................................ 46 3.8.5. Audio Characteristics ..................................................................................................... 46 3.9. SIM Card Interface ................................................................................................................ 47 3.9.1. SIM Card Application ...................................................................................................... 47 3.9.2. SIM Cassette .................................................................................................................. 49 3.10. PCM Interface ........................................................................................................................ 52 3.11. Behaviors of the RI ................................................................................................................ 52 3.12. Network Status Indication ...................................................................................................... 53 4 Antenna Interface ............................................................................................................................... 55 4.1. RF Reference Design ............................................................................................................ 55 4.2. RF Output Power ................................................................................................................... 56 4.3. RF Receiving Sensitivity ........................................................................................................ 56 4.4. Operating Frequencies .......................................................................................................... 57 4.5. RF Cable Soldering ............................................................................................................... 57 5 Electrical, Reliability and Radio Characteristics ............................................................................ 58 5.1. Absolute Maximum Ratings................................................................................................... 58 5.2. Operating Temperature ......................................................................................................... 59 5.3. Power Supply Ratings ........................................................................................................... 59 5.4. Current Consumption ............................................................................................................ 60 5.5. Electro-static Discharge ........................................................................................................ 61 6 Mechanical Dimensions .................................................................................................................... 63 6.1. Mechanical Dimensions of Module ....................................................................................... 63 6.2. Recommended Footprint ....................................................................................................... 65 7 Storage and Manufacturing .............................................................................................................. 66 7.1. Storage .................................................................................................................................. 66 7.2. Soldering ............................................................................................................................... 67 7.3. Packaging .............................................................................................................................. 68 7.3.1. Tape and Reel Packaging .............................................................................................. 68 8 Appendix A Reference ....................................................................................................................... 70 9 Appendix B GPRS Coding Scheme ................................................................................................. 74 10 Appendix C GPRS Multi-slot Class .................................................................................................. 76
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                5 / 76      Table Index TABLE 1: MODULE KEY FEATURES ................................................................................................................ 11 TABLE 2: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE ........................ 13 TABLE 3: PIN DESCRIPTION ........................................................................................................................... 17 TABLE 4: OVERVIEW OF OPERATING MODES ............................................................................................. 21 TABLE 5: SUMMARY OF STATE TRANSITION ............................................................................................... 32 TABLE 6: LOGIC LEVELS OF THE UART INTERFACES ................................................................................ 35 TABLE 7: PIN DEFINITION OF THE UART INTERFACES .............................................................................. 35 TABLE 8: PIN DEFINITION OF AUDIO INTERFACE ....................................................................................... 41 TABLE 9: TYPICAL ELECTRET MICROPHONE CHARACTERISTICS ........................................................... 46 TABLE 10: TYPICAL AUDIO OUTPUT CHARACTERISTICS .......................................................................... 46 TABLE 11: PIN DEFINITION OF THE SIM INTERFACE .................................................................................. 47 TABLE 12: PIN DESCRIPTION OF AMPHENOL SIM CARD HOLDER ........................................................... 50 TABLE 13: PIN DESCRIPTION OF MOLEX SIM CARD HOLDER .................................................................. 51 TABLE 14: BEHAVIOURS OF THE RI .............................................................................................................. 52 TABLE 15: WORKING STATE OF THE NETLIGHT .......................................................................................... 53 TABLE 16: PIN DEFINITION OF THE RF_ANT ................................................................................................ 55 TABLE 17: THE MODULE CONDUCTED RF OUTPUT POWER .................................................................... 56 TABLE 18: THE MODULE CONDUCTED RF RECEIVING SENSITIVITY ....................................................... 56 TABLE 19: THE MODULE OPERATING FREQUENCIES ................................................................................ 57 TABLE 20: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 58 TABLE 21: OPERATING TEMPERATURE ........................................................................................................ 59 TABLE 22: THE MODULE POWER SUPPLY RATINGS .................................................................................. 59 TABLE 23: THE MODULE CURRENT CONSUMPTION .................................................................................. 60 TABLE 24: THE ESD ENDURANCE (TEMPERATURE: 25℃, HUMIDITY: 45 %) ........................................... 62 TABLE 25: RELATED DOCUMENTS ................................................................................................................ 70 TABLE 26: TERMS AND ABBREVIATIONS ...................................................................................................... 71 TABLE 27: DESCRIPTION OF DIFFERENT CODING SCHEMES .................................................................. 74 TABLE 28: GPRS MULTI-SLOT CLASSES ...................................................................................................... 76
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                6 / 76      Figure Index   FIGURE 1: MODULE FUNCTIONAL DIAGRAM ............................................................................................... 14 FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 16 FIGURE 3: VOLTAGE DROP DURING TRANSMITTING ................................................................................. 22 FIGURE 4: REFERENCE CIRCUIT FOR THE VBAT INPUT ........................................................................... 23 FIGURE 5: REFERENCE CIRCUIT FOR POWER SUPPLY ............................................................................ 24 FIGURE 6: REFERENCE DIAGRAM FOR SWITCHING POWER CONVERTER ........................................... 24 FIGURE 7: TURN ON THE MODULE WITH AN OC DRIVER .......................................................................... 25 FIGURE 8: TURN ON THE MODULE WITH A BUTTON .................................................................................. 25 FIGURE 9: TURN-ON TIMING .......................................................................................................................... 26 FIGURE 10: TURN-OFF TIMING ...................................................................................................................... 27 FIGURE 11: AN OC DRIVER FOR EMERG_OFF ............................................................................................ 29 FIGURE 12: REFERENCE CIRCUIT FOR EMERG_OFF BY BUTTON .......................................................... 29 FIGURE 13: TIMING OF RESTARTING SYSTEM ............................................................................................ 30 FIGURE 14: TIMING OF RESTARTING SYSTEM AFTER EMERGENCY SHUTDOWN ................................ 30 FIGURE 15: RTC SUPPLIED FROM A NON-CHARGEABLE BATTERY ......................................................... 33 FIGURE 16: RTC SUPPLIED FROM A RECHARGEABLE BATTERY ............................................................. 33 FIGURE 17: RTC SUPPLIED FROM A CAPACITOR ....................................................................................... 33 FIGURE 18: CHARGING CHARACTERISTICS OF SEIKO’S XH414H-IV01E ................................................ 34 FIGURE 19: REFERENCE DESIGN FOR FULL-FUNCTION UART ................................................................ 37 FIGURE 20: REFERENCE DESIGN FOR UART PORT ................................................................................... 38 FIGURE 21: REFERENCE DESIGN FOR UART PORT WITH HARDWARE FLOW CONTROL .................... 38 FIGURE 22: THE CONNECTION OF FIRMWARE DEBUGGING AND UPGRADE......................................... 39 FIGURE 23: LEVEL MATCH DESIGN FOR 3.3V SYSTEM .............................................................................. 39 FIGURE 24: LEVEL MATCH DESIGN FOR 5V SYSTEM ................................................................................. 40 FIGURE 25: LEVEL MATCH DESIGN FOR RS-232 ......................................................................................... 41 FIGURE 26: REFERENCE DESIGN FOR AIN1&AIN2 ..................................................................................... 43 FIGURE 27: REFERENCE RECEIVER INTERFACE DESIGN OF AOUT1 ..................................................... 44 FIGURE 28: SPEAKER INTERFACE WITH AMPLIFIER CONFIGURATION OF AOUT1................................ 44 FIGURE 29: REFERENCE RECEIVER INTERFACE DESIGN OF AOUT2 ..................................................... 45 FIGURE 30: SPEAKER INTERFACE WITH AMPLIFIER CONFIGURATION OF AOUT2................................ 45 FIGURE 31: EARPHONE INTERFACE DESIGN .............................................................................................. 46 FIGURE 32: REFERENCE CIRCUIT FOR 8-PIN SIM CARD HOLDER .......................................................... 48 FIGURE 33: REFERENCE CIRCUIT FOR 6-PIN SIM CARD HOLDER .......................................................... 49 FIGURE 34: AMPHENOL C707 10M006 512 2 SIM CARD HOLDER .............................................................. 50 FIGURE 35: MOLEX 91228 SIM CARD HOLDER ............................................................................................ 51 FIGURE 36: RI BEHAVIOUR OF VOICE CALLING AS A RECEIVER ............................................................. 52 FIGURE 37: RI BEHAVIOUR AS A CALLER ..................................................................................................... 53 FIGURE 38: RI BEHAVIOUR OF URC OR SMS RECEIVED ........................................................................... 53 FIGURE 39: REFERENCE DESIGN FOR NETLIGHT ..................................................................................... 54 FIGURE 40: REFERENCE DESIGN FOR RF .................................................................................................. 55 FIGURE 41: RF SOLDERING SAMPLE ........................................................................................................... 57
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                7 / 76      FIGURE 42: GC10 MODULE TOP AND SIDE DIMENSIONS (UNIT: MM) ....................................................... 63 FIGURE 43: GC10 MODULE BOTTOM DIMENSIONS (UNIT: MM) ................................................................ 64 FIGURE 44: RECOMMENDED FOOTPRINT (UNIT: MM) ................................................................................ 65 FIGURE 48: RAMP-SOAK-SPIKE REFLOW PROFILE .................................................................................... 68 FIGURE 49: DIMENSIONS OF TAPE ............................................................................................................... 69 FIGURE 50: DIMENSIONS OF REEL ............................................................................................................... 69 FIGURE 51: RADIO BLOCK STRUCTURE OF CS-1, CS-2 AND CS-3 ........................................................... 74 FIGURE 52: RADIO BLOCK STRUCTURE OF CS-4 ....................................................................................... 75
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                8 / 76      1 Introduction  This document defines the GC10 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  GC10  module  to design and set up mobile applications easily.  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  GC10  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. If not so, Quectel does not take on any liability for your failure to comply with these precautions.    Full attention must be given to driving at all times in order to reduce the risk of an accident. Using a mobie while driving (even with a handsfree kit) cause distraction and can lead to an accident. You must comply with laws and regulations restrcting the use of wireless devices while driving.    Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it switched  off.  The  operation  of  wireless  appliances  in  an  aircraft  is  forbidden  to prevent interference  with communication systems. Consult the airline  staff about the use of wireless devices on boarding the aircraft. If your device offers a Flight Mode which must be enabled prior to boarding an aircraft.  Switch  off  your  wireless  device  when  in  hospitals or  clinics  or  other  health  care facilities.  These  requests  are  desinged  to  prevent  possible  interference  with sentitive medical equipment.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                9 / 76            GSM cellular terminals or mobiles operate over radio frequency signal and cellular network  and  cannot  be  guaranteed  to  connect  in  all  conditions,  for  example  no mobile  fee  or  an  invalid  SIM  card.  While  you  are  in  this  condition  and  need emergent  help,  please  remember  using  emergency  call.  In  order  to  make  or receive call, the cellular terminal or mobile must be switched on and in a service area with adequate cellular signal strength.  Your cellular terminal or mobile contains a transmitter and receiver. When it is ON , it receives and transmits radio frequency energy. RF interference can occur if it is used close to TV set, radio, computer or other electric equipment.  In locations with potencially explosive atmospheres, obey all posted signs to turn off  wireless  devices  such  as  your  phone  or  other  cellular  terminals.  Areas  with potencially exposive atmospheres including fuelling areas, below decks on boats, fuel  or  chemical  transfer  or  storage  facilities,  areas  where  the  air  contains chemicals or particles such as grain, dust or metal powders.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                10 / 76      2 Product Concept      2.1. General Description  GC10  is  a  Quad-band  GSM/GPRS  engine  that  works  at  frequencies  of  GSM850MHz,  GSM900MHz, DCS1800MHz and PCS1900MHz. The GC10 features GPRS multi-slot class 10 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 19mm×16.9mm×2.35mm, the module can meet almost all the requirements for M2M applications, including Vehicles and Personal Tracking, Security System, Wireless POS, Industrial PDA, Smart Metering, and Remote Maintenance & Control, etc.  GC10 is an SMD type module, which can be easily embedded into applications through its 44-pin pads. It provides abundant hardware interfaces like Audio and UART Interface.    Designed with power saving technique, the current consumption of GC10 is as low as 1.3mA in sleep mode when DRX is 5.  GC10  is  integrated  with  Internet  service  protocols,  such  as  TCP/UDP,  HTTP  and  PPP.  Extended  AT commands have been developed for you to use these Internet service protocols easily.    The module fully complies with the RoHS directive of the European Union. 2.2. Directives and Standards    The GC10 module is designed to comply with the FCC statements. FCC ID: XMR201403GC10 The Host system using GC10, should have label indicated FCC ID: XMR201403GC10.  2.2.1.  FCC Statement    1. This device complies with Part 15 of the FCC rules. Operation is subject to the following conditions: a) This device may not cause harmful interference. b) This device must accept any interference received, including interference that may cause undesired
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                11 / 76      operation. 2. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment.  2.2.2.  FCC Radiation Exposure Statement    This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body as well as kept minimum 20cm from radio antenna depending on the Mobile status of this module usage. This module should NOT be installed and operating simultaneously with other radio.     The  manual  of  the  host  system,  which  uses  GC10,  must  include  RF  exposure  warning  statement  to advice  user  should  keep  minimum  20cm  from  the  radio  antenna  of  GC10  module  depending  on  the Mobile status.  Note: If a portable device (such as PDA) uses GC10 module, the device needs to do permissive change and SAR testing.  The following list of antenna is indicating the maximum permissible antenna gain.  Part Number  Frequency   Range (MHz) Peak Gain (XZ-V) Average Gain   (XZ-V)  VSWR  Impedance   3R007A  PCS1900:1850~1990 GSM850:824-894 1 dBi typ.  1 dBi typ.  3 max    50Ω  2.3. Key Features  The following table describes the detailed features of GC10 module.    Table 1: Module Key Features Feature  Implementation Power Supply  Single supply voltage: 3.3V~4.6V Typical supply voltage: 4.0V Power Saving  Typical power consumption in sleep mode: 1.3 mA@ DRX=5                         1.1 mA@ DRX=9
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                12 / 76      Frequency Bands   Quad-band: GSM850/GSM900/DCS1800/PCS1900   The module can search these frequency bands automatically   Compliant to GSM Phase 2/2+ Transmitting Power     Class 4 (2W) at GSM850/GSM900   Class 1 (1W) at DCS1800/PCS1900 GPRS Connectivity   GPRS multi-slot class 10   GPRS mobile station class B Temperature Range     Normal operation: -35°C~ +80°C   Restricted operation: -40°C ~ -35°C and +80°C ~ +85°C 1)    Storage temperature: -45°C ~ +90°C DATA GPRS   GPRS data downlink transfer: max. 85.6kbps     GPRS data uplink transfer: max. 42.8kbps     Coding scheme: CS-1, CS-2, CS-3 and CS-4   Internet service protocols TCP/UDP, PPP, HTTP   Support Packet Broadcast Control Channel (PBCCH)   USSD  Support Unstructured Supplementary Service Data SMS   MT/MO, Text and PDU mode   SMS storage: SIM card SIM Interface  Support SIM card: 1.8V/3.0V Audio Features Speech codec modes:   Half Rate (ETS 06.20)   Full Rate (ETS 06.10)   Enhanced Full Rate (ETS 06.50/06.60/06.80)   Echo Suppression   Echo Cancellation   Noise Reduction UART Interfaces UART Port:   Seven lines on UART port interface   Used for AT command, GPRS data     Support fixed baud rate from 2400bps to 460800bps   Support autobauding from 4800bps to 115200bps Debug Port:     Two lines on debug port interface DBG_TXD and DBG_RXD   Used for firmware debugging and log output   Used for firmware upgrade   The baud rate is fixed at 921600bps Phonebook Management  Support phonebook types: SM/ON/FD/LD SIM Application Toolkit  Support SAT class 3, GSM 11.14 Release 99 Real Time Clock  Supported
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                13 / 76        When the module works within this temperature range, the deviations from the GSM specification may occur. For example, the frequency error or the phase error will be increased.  Table 2: Coding Schemes and Maximum Net Data Rates over Air Interface  2.4. Functional Diagram  The following figure shows a block diagram of GC10 and illustrates the major functional parts.      Radio frequency part   Power management   Memory   The peripheral interface —Power supply —Turn-on/off interface —UART interfaces —Audio interfaces —SIM interface   —PCM interface —RTC interface —RF interface Physical Characteristics  Size: 19±0.15×16.9±0.15×2.35±0.2mm     Weight: Approx.1.3g Firmware Upgrade  Firmware upgrade via debug port Antenna Interface  Connected to antenna pad with 50 Ohm impedance control Coding Scheme  1 Timeslot  2 Timeslot  4 Timeslot CS-1  9.05kbps  18.1kbps  36.2kbps CS-2  13.4kbps  26.8kbps  53.6kbps CS-3  15.6kbps  31.2kbps  62.4kbps CS-4  21.4kbps  42.8kbps  85.6kbps NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                14 / 76         Figure 1: Module Functional Diagram    2.5. Evaluation Board    In order to help you to develop applications with GC10, Quectel supplies an evaluation board (EVB) with RS-232 to USB cable, power adapter, antenna, firmware upgrade cable (UART to USB cable) and other peripherals to control or test the module. For details, please refer to the document [11].
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                15 / 76      3 Application Interface  The module adopts 44-pin pads with LCC package. The following chapters provide detailed descriptions about these pins below.    Power supply (Please refer to chapter 3.3)   Power on/down (Please refer to chapter 3.4)   Power saving technology (Please refer to chapter 3.5)   RTC (Please refer to chapter 3.6)     Serial interfaces (Please refer to chapter 3.7)     Audio interfaces (Please refer to chapter 3.8)     SIM interface (Please refer to chapter 3.9)   PCM interface (Please refer to chapter 3.10)
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                16 / 76      3.1. Pin of Module 3.1.1.  Pin Assignment  Figure 2: Pin Assignment
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                17 / 76      3.1.2.  Pin Description Table 3: Pin Description Power Supply Pin Name  Pin NO.  I/O Description  DC Characteristics    Comment VBAT  33,34  I 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. VRTC  13  I/O  Power supply for RTC when VBAT is not supplied for the system. Charging for backup battery or golden capacitor when the VBAT is applied. VImax=3.3V VImin=2.0V VInorm=2.8V VOmax=2.9V VOmin=2.7V VOnorm=2.8V Iout(max)=1.35mA Iin=70uA Recommended to be connected to a backup battery or a golden capacitor. If unused, keep this pin open. VDD_EXT  29  O  Supply  3.0V  voltage  for external circuit. Vmax=3.1V Vmin=2.9V Vnorm=3.0V Imax=20mA Recommend to add a 2.2 or 4.7uF bypass capacitor, when using this pin for power supply. If unused, keep this pin open. GND 32,35,36,37, 39   Ground       Turn on/off Pin Name  Pin   NO.  I/O Description  DC Characteristics  Comment PWRKEY  5  I Power on/off key. PWRKEY should be pulled down for a moment to turn on or turn off the system. VILmax=2.0V VIHmin=2.3V VImax=3.3V Recommend to add an OC driver circuit to control this pin. Emergency Shutdown Pin Name  Pin   NO.  I/O Description  DC Characteristics  Comment
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                18 / 76      EMERG_ OFF  40  I Emergency off. Pulled down for at least 10ms, which will turn off the module in case of emergency. Use it only when shutdown via PWRKEY or AT command cannot be achieved. VILmax= 0.3×VDD_EXT VIHmin= 0.7×VDD_EXT Pulled up to VDD_EXT internally. OC/OD driver required in cellular device application. If unused, keep this pin open.     Module Indicator Pin Name  Pin   NO.  I/O Description  DC Characteristics  Comment NETLIGHT  14  O  Network status indication VOLmin=0V VOLmax= 0.3×VDD_EXT VOHmin= 0.7×VDD_EXT VOHmax=                                   VDD_EXT If unused, keep this pin open. Audio Interfaces Pin Name  Pin   NO.  I/O Description  DC Characteristics  Comment MIC1P MIC1N  19,20  I  Channel 1 positive and negative voice input   For Audio DC characteristics refer to Chapter 3.9. Main audio channel. Recommended to add ESD protection components at the MIC1P/N lines. If unused, keep these pins open. SPK1P SPK1N  21,22  O  Channel 1 positive and negative voice output MIC2P MIC2N  17,18  I  Channel 2 positive and negative voice input   Auxiliary audio channel. Recommended to add ESD protection components at the MIC2P/N lines. If unused, keep these pins open. SPK2P  16  O  Channel 2 single-ended voice output AGND  15    Audio analog ground. Separate ground connection for external audio circuits.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                19 / 76      UART Port Pin Name  Pin   NO.  I/O Description  DC Characteristics  Comment RI  6  O  Ring indication  VILmin=0V VILmax= 0.3×VDD_EXT VIHmin= 0.7×VDD_EXT VIHmax=                     VDD_EXT VOLmin=0V VOLmax= 0.3×VDD_EXT VOHmin= 0.7×VDD_EXT VOHmax=                    VDD_EXT If only use TXD, RXD and GND to communicate, recommended connecting RTS to GND via a 0R resistor and keeping other pins open. DTR  7 I Data terminal ready DCD  8  O  Data carrier detection TXD  9  O  Transmit data RXD  10  I  Receive data RTS  11  I  Request to send CTS  12  O  Clear to send Debug Port Pin Name  Pin NO.  I/O Description  DC Characteristics  Comment DBG_TXD  31  O Used for firmware debugging and upgrade. The baud rate is fixed at 921600bps. VILmin=0V VILmax= 0.3×VDD_EXT VIHmin= 0.7×VDD_EXT VIHmax=                     VDD_EXT VOLmin=0V VOLmax= 0.3×VDD_EXT VOHmin= 0.7×VDD_EXT VOHmax=                    VDD_EXT If unused, keep these pins open. DBG_RXD  30  I SIM Interface Pin Name  Pin   NO.  I/O Description  DC Characteristics  Comment SIM_VDD  23  O  Power supply for SIM card The voltage can be selected by software automatically. Either 1.8V or 3V. All signals of SIM interface should be protected against ESD with a TVS diode
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                20 / 76      SIM_RST  24  O  SIM reset    array. Maximum trace length is 100mm from the module pad to SIM card holder. SIM_ DATA  25  I/O SIM data     SIM_CLK  26  O  SIM clock   SIM_GND  27    SIM ground     SIM_ PRESENCE 28 I SIM card detection VILmin=0V VILmax= 0.3×VDD_EXT VIHmin= 0.7×VDD_EXT VIHmax= VDD_EXT SIM_PRESENCE must be pulled up by an external resistor when SIM card detection function is used.   PCM Interface Pin Name  Pin NO.  I/O Description  DC Characteristics  Comment PCM_ IN  1  I  PCM data input VILmin=0V VILmax= 0.3×VDD_EXT VIHmin= 0.7×VDD_EXT VIHmax= VDD_EXT VOLmin=0V VOLmax= 0.3×VDD_EXT VOHmin= 0.7×VDD_EXT VOHmax=                    VDD_EXT PCM function is not supported at present. If unused, keep these pins open. PCM_SYNC 2 O PCM frame synchronization PCM_ OUT  3  O  PCM data output PCM_ CLK  4  O  PCM clock RF Interface Pin Name  Pin NO.  I/O Description  DC Characteristics  Comment RF_ANT  38  I/O RF antenna pad  Impedance of 50Ω  Please refer to Chapter 4 Other Interface Pin Name  Pin NO.  I/O Description  DC Characteristics  Comment RESERVED 41,42,43,44        Please keep these pins open.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                21 / 76      3.2. Operating Modes  The table below briefly summarizes the various operating modes in the following chapters. Table 4: Overview of Operating Modes Mode Function Normal Operation Mode GSM/GPRS Sleep The module will automatically go into sleep mode if DTR is set to high  level and  there is  no interrupt (such  as GPIO interrupt or  data on UART  port). In  this  case,  the current consumption  of  module  will  reduce  to  the  minimal  level. During  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.  The module is not reachable through GPRS channel. GPRS Standby The module is registered to GPRS network, but no GPRS PDP context is active. The SGSN knows the Routing Area where the module is located at. GPRS Ready The PDP context is active, but no data transfer is ongoing. The module is  ready to receive or send GPRS data. The SGSN knows the cell where the module is located at.   GPRS Data There  is  GPRS  data  in  transfer.  In  this  mode,  power consumption is decided by the PCL, working RF band and GPRS multi-slot configuration. Power Down Mode Normal  shutdown  by  sending  the  “AT+QPOWD=1”  command,  using  the PWRKEY  or  the  EMERG_OFF1)  pin.  The  power  management  ASIC disconnects  the  power  supply from  the  base band part of  the module,  and only the power supply for the RTC is remained. Software is not active. The UART interfaces are not accessible. Operating voltage (connected to VBAT) remains applied. Minimum Functionality Mode “AT+CFUN” command can set the module to a minimum functionality mode without removing the power supply. In this case, the RF part of the module will not work or the SIM card will not be accessible, or both RF part and SIM card  will  be  disabled,  but  the  UART  port  is  still  accessible.  The  power consumption in this case will be reduced.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                22 / 76        Use the EMERG_OFF pin only when failing to turn off the module by the command “AT+QPOWD=1” and the PWRKEY pin. For more details, please refer to Section 3.4.2.4.  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 4.615 ms, 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 GC10 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.  Figure 3: Voltage Drop during Transmitting  3.3.2.  Decrease Supply Voltage Drop The power supply range of the module is 3.3V to 4.6V. Make sure that the input voltage will never drop below 3.3V even in a transmitting burst. If the power voltage drops below 3.3V, the module could turn off automatically. For better power performance, it is recommended to place a 1000uF tantalum capacitor with low ESR and ceramic capacitor 100nF, 47pF and 10pF near the VBAT pin. The reference circuit is illustrated in Figure 4.  NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                23 / 76      The VBAT route should be wide enough to ensure that there is not too much voltage drop during transmit burst. The width of trace should be no less than 2mm and the principle of the VBAT route is the longer route, the wider trace.    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 to 2A at least. If the voltage drop between the input and output is not too high, it is suggested to use a LDO as module’s power supply. If there is a big voltage difference between the input source and the desired output (VBAT), a switching power converter is recommended to be used as a power supply.  Figure 5 shows a reference design for +5V input power source. The designed output for the power supply is 4.16V and the maximum load current is 3A. In addition, in order to get a stable output voltage, a zener diode is placed close to the pins of VBAT. As to the zener diode, it is suggested to use a zener diode whose reverse zener voltage is 5.1V and dissipation power is more than 1 Watt.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                24 / 76       Figure 5: Reference Circuit for Power Supply  If a switching power converter is used, please follow the diagram to design the circuit, it is beneficial to maintain stable power supply for the module.  Figure 6: Reference Diagram for Switching Power Converter  3.3.4.  Monitor Power Supply To monitor the supply voltage, you can use the “AT+CBC” command which includes three parameters: charging  status, remaining  battery capacity  and  voltage  value  (in  mV).  It  returns  the  0-100  percent  of battery  capacity  and  actual  value  measured  between  VBAT  and  GND.  The  voltage  is  automatically measured  in  period  of  5s.  The  displayed  voltage  (in  mV)  is  averaged  over  the  last  measuring  period before the “AT+CBC” command is executed.  For details, please refer to document [1].  3.4. Power On and Down Scenarios 3.4.1.  Power On The module can be turned on by driving the pin PWRKEY to a low level voltage, after booting successfully, PWRKEY pin can be released. You may monitor the status of the NETLIGHT pin to judge whether the module is power-on or not. When NETLIGHT pin outputs a signal with certain frequency, it indicates the module is turned on successfully. The NETLIGHT pin will keep in low level all the time after the module is
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                25 / 76      turned  off.  An  OC  driver  circuit  is  suggested  to  control  the  PWRKEY.  A  simple  reference  circuit  is illustrated as below:    Figure 7: Turn On the Module with an OC Driver   GC10 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 receives AT command, it will be powered on after a delay of 5~6 seconds. Host controller should first send the “AT” string in order that the module can detect baud rate of host controller, and it will continuously send 1~5 “AT” string until receiving “OK” string from the module. Then enter “AT+IPR=x;&W” to set a fixed baud rate for the module and save the configuration to flash memory of the  module. After 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].    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. For the best performance, the TVS component must be placed  nearby  the  button.  When  pressing  the  key,  electrostatic  strike  may  generate  from  finger.  A reference circuit is shown in the following figure:  Figure 8: Turn On the Module with a Button NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                26 / 76      The turn-on timing is illustrated as the following figure: VDD_EXT(OUTPUT)NETLIGHT(OUTPUT)VIL< 2.0VVIH > 2.3VVBATPWRKEY(INPUT)>1sOFF BOOTINGMODULE STATUS RUNNING>10ms>910msEMERG_OFF(INPUT)T1 Figure 9: Turn-on Timing   1.  Make  sure  that  VBAT  is  stable  before  pulling  down  PWRKEY  pin.  At  least  30ms  for  T1  is recommended. 2.  EMERG_OFF should be floated when it is unused.  You can monitor  the  status  of  the  NETLIGHT pin  to  judge  whether  the  module  is  power-on.  After  the NETLIGHT  pin  goes  to  pulse,  PWRKEY  can  be  released.  If  the  NETLIGHT  pin  is  ignored,  pull  the PWRKEY pin to low level for more than 2 seconds to turn on the module.    3.4.2.  Power Down The following procedures can be used to turn off the module:    Normal power down procedure: Turn off module by the PWRKEY pin.     Normal power down procedure: Turn off module by command “AT+QPOWD”.   Over-voltage or under-voltage automatic shutdown: Take effect when over-voltage or under-voltage is detected.     Emergent power down procedure: Turn off module by the EMERG_OFF pin.  NOTES
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                27 / 76      After  power  down,  no  further AT  commands can  be executed, only  the  RTC  is  still active. The  power down mode can be indicated by the VDD_EXT pin (the NETLIGHT pin can also be used.), which is a low level voltage in this mode.  3.4.2.1.  Power Down Module by the PWRKEY Pin It is a safe way to turn off the module by driving the PWRKEY to a low level voltage for a certain time. The power down scenario is illustrated in Figure 10:  Figure 10: Turn-off Timing  The power down procedure causes the module to log off from the network and allows the firmware to save important data before completely disconnecting the power supply.  Before the completion of the power down procedure, the module sends the result code, shown as below:    NORMAL POWER DOWN   When autobauding is active and DTE&DCE are not correctly synchronized after start-up, this result code will not appear. It is recommended to set a fixed baud rate for the module.    NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                28 / 76      3.4.2.2.  Power Down Module by AT Command It is also a safe way to turn off the module via AT command “AT+QPOWD=1”. This command will let the module  log  off  from  the  network  and  allow  the  firmware  to  save  important  data  before  completely disconnecting the power supply.  Before the completion of the power down procedure, the module sends the result code, shown as below:      NORMAL POWER DOWN  Please refer to the document [1] for details about the AT command “AT+QPOWD”.    3.4.2.3.  Over-voltage or Under-voltage Automatic Shutdown The module will constantly monitor the voltage applied on the VBAT, if the voltage is≤3.5V, the following URC will be presented:           UNDER_VOLTAGE WARNING  If the voltage is≥4.5V, the following URC will be presented:       OVER_VOLTAGE WARNING  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   When autobauding is active and DTE&DCE are not correctly synchronized after start-up, this result code will not appear. It is recommended to set a fixed baud rate for the module.  NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                29 / 76      3.4.2.4.  Emergency Shutdown by EMERG_OFF Pin The module can be shut down by driving the pin EMERG_OFF to a low level voltage over 10ms and then releasing it. The EMERG_OFF line can be driven by an OC/OD driver or a button. The circuit is illustrated as the following figures:  Figure 11: An OC Driver for EMERG_OFF S2EMERG_OFFTVS2Close to S2 Figure 12: Reference Circuit for EMERG_OFF by 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. Although turning off the module by EMERG_OFF is fully tested and no error is detected, this operation is still  a  big  risk  as  it  could  cause  to  destroy  the  code  or  data  area  of  the  flash  memory  in  the  module. Therefore, it is recommended that PWRKEY or AT command should always be the preferential way to turn off the system.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                30 / 76      3.4.3.  Restart You can restart the module by driving the PWRKEY  to a  low  level voltage for a  certain time, which is similar to the way of turning on module. Before restarting the module, at least 500ms should be delayed after detecting the low level of VDD_EXT. The restart timing is illustrated as the following figure:  Figure 13: Timing of Restarting System  The module can also be restarted by the PWRKEY after emergency shutdown.  Figure 14: Timing of Restarting System after Emergency Shutdown   Before pulling down the EMERG_OFF pin, please ensure that the PWRKEY pin has been released.    NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                31 / 76      3.5. Power Saving Technology  Based on system requirements, there are several actions to drive the module to enter into low current consumption state. For example, “AT+CFUN” can be used to set module into minimum functionality mode and DTR hardware interface signal can be used to lead system to sleep mode.  3.5.1.  Minimum Functionality Mode Minimum functionality mode reduces the functionality of the module to a minimum level. The consumption of the current can be minimized when the slow clocking mode is activated at the same time. The mode is set with the “AT+CFUN” command which provides the choice of the functionality levels <fun>=0,1,4.    0: Minimum functionality.   1: Full functionality (default).   4: Disable both transmitting and receiving of RF part.  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 not be 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 not be available.    After  the  module  is  set  by  “AT+CFUN=0”  or  “AT+CFUN=4”,  it  can  return  to  full  functionality  by “AT+CFUN=1”.  For detailed information about “AT+CFUN”, please refer to the document [1].  3.5.2.  Sleep Mode The  sleep mode is  disabled by default. You  can  enable it  by “AT+QSCLK=1”. On the  other hand,  the default setting is “AT+QSCLK=0” and in this mode, the module cannot enter into sleep mode.    When the module is set by the command “AT+QSCLK=1”, you can control the module to enter into or exit from the sleep mode through pin DTR. When DTR is set to high level, and there is no on-air or hardware interrupt  such  as  GPIO  interrupt  or  data  on  UART  port,  the  module  will  enter  into  sleep  mode automatically. In this mode, the module can still receive voice, SMS or GPRS paging from network, but the UART port does not work.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                32 / 76      3.5.3.  Wake Up Module from Sleep Mode When the module is in the sleep mode, the following methods can wake up the module:      If the DTR pin is set to low level, it would wake up the module from the sleep mode.     Receive a voice or GPRS data from network to wake up module.   Receive an SMS from network to wake up module.   DTR pin should be kept in low level during communication between the module and DTE.  3.5.4.  Summary of State Transition Table 5: Summary of State Transition  3.6. RTC Backup  The  RTC  (Real  Time  Clock)  can  be  supplied  by  an  external  capacitor  or  battery  (rechargeable  or non-chargeable)  through  the  pin  VRTC. A  2.2K  resistor has  been integrated in  the  module for  current limiting. A coin-cell battery or a super-cap can be used to backup power supply for RTC.  The following figures show various sample circuits for RTC backup. Current Mode Next Mode Power Down  Normal Mode  Sleep Mode Power Down    Use PWRKEY   Normal Mode  AT+QPOWD, use PWRKEY pin, or use EMERG_OFF pin   Use AT command “AT+QSCLK=1” and pull up DTR Sleep Mode  Use PWRKEY pin, or use EMERG_OFF pin Pull down DTR or incoming voice call or SMS or GPRS data    NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                33 / 76       Figure 15: RTC Supplied from a Non-chargeable Battery  Figure 16: RTC Supplied from a Rechargeable Battery  Figure 17: RTC Supplied from a Capacitor  The  following  figure  shows  the  charging  characteristics  of  a  coin-type  rechargeable  battery XH414H-IV01E from Seiko.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                34 / 76       Figure 18: Charging Characteristics of Seiko’s XH414H-IV01E  3.7. Serial Interfaces  The module provides two universal asynchronous serial ports: UART port and debug port. The module is designed as a DCE (Data Communication Equipment), following the traditional DCE-DTE (Data Terminal Equipment) connection. Autobauding function supports baud rate from 4800bps to 115200bps.    The UART port:    TXD: Send data to RXD of DTE.   RXD: Receive data from TXD of DTE.   RTS: Request to send.   CTS: Clear to send.   DTR: DTE is ready and inform DCE (this pin can wake the module up).   RI: Ring indicator (when the call, SMS, data of the module are coming, the module will output signal to inform DTE).   DCD: Data carrier detection (the validity of this pin demonstrates the communication link is set up).   The module disables hardware flow control by default. When hardware flow control is required, RTS and CTS  should  be  connected  to  the  host.  AT  command  “AT+IFC=2,2”  is  used  to  enable  hardware  flow control. AT command “AT+IFC=0,0” is used to disable the hardware flow control. For more details, please refer to the document [1]. NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                35 / 76      The Debug port:    DBG_TXD: Send data to the COM port of computer.   DBG_RXD: Receive data from the COM port of computer.  The logic levels are described in the following table:  Table 6: Logic Levels of the UART Interfaces  Table 7: Pin Definition of the UART Interfaces  Parameter  Min.  Max.    Unit VIL  0  0.3×VDD_EXT  V VIH  0.7×VDD_EXT  VDD_EXT    V VOL  0  0.3×VDD_EXT  V VOH  0.7×VDD_EXT  VDD_EXT  V Interfaces  Pin Name  Pin NO.  Description UART Port TXD  9  Transmit data RXD  10  Receive data RTS  11  Request to send CTS  12  Clear to send DTR  7  Data terminal ready     DCD  8  Data carrier detection RI  6  Ring indication Debug Port DBG_TXD  31  Transmit data DBG_RXD  30  Receive data
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                36 / 76      3.7.1.  UART Port 3.7.1.1.  The Features of UART Port   Seven lines on UART interface.   Contain data lines as TXD and RXD, hardware flow control lines as RTS and CTS, other control lines as DTR, DCD and RI.   Used for AT command, GPRS data, etc.     Support the following communication baud rates: 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200, 230400 and 460800bps.   The default setting is autobauding mode. Support the following baud rates for autobauding function: 4800, 9600, 19200, 38400, 57600 and 115200bps.     The module disables hardware flow control by default. AT command “AT+IFC=2,2” is used to enable hardware flow control.  After setting a  fixed baud rate  or  autobauding, please send  “AT” string at  that  rate.  The UART port  is ready when it responds “OK”.    Autobauding allows the module to detect the baud rate by receiving the string “AT” from the host or PC automatically,  which  gives  module  flexibility  without  considering  which  baud  rate  is  used  by  the  host controller.  Autobauding  is  enabled  by  default.  To  take  advantage  of  the  autobauding  mode,  special attention should be paid according to the following requirements:  1.  Synchronization between DTE and DCE  When DCE  (the  module)  powers  on  with  the  autobauding  enabled,  it  is  recommended  to  wait  5~6 seconds before sending the first “AT” characters. After receiving the “OK” response, DTE and DCE are correctly synchronized.  If the host controller needs URC in the mode of autobauding, it must be synchronized firstly. Otherwise the URC will be discarded.  2.  Restrictions on autobauding operation    The UART port has to be operated at 8 data bits, no parity and 1 stop bit (factory setting).   The  Unsolicited  Result Codes  like  “RDY”,  “+CFUN:  1”  and  “+CPIN: READY” will  not  be  indicated when the module is turned on with autobauding enabled and not be synchronized.   Any other unsolicited result codes will be sent at the previous baud rate before the module detects the  new  baud  rate  by  receiving  the  “AT”  string.  The  DTE  may  receive  unknown  characters  after switching to new baud rate.   It is not recommended to switch to autobauding from a fixed baud rate.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                37 / 76       To ensure 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.  The Connection of UART The  connection  between module  and  host by  UART  port is  very flexible.  Three  connection  styles  are illustrated as below.    Reference  design  for  Full-Function  UART  connection  is  shown  as  below  when  it  is  applied  in modulation-demodulation.  Figure 19: Reference Design for Full-Function UART              NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                38 / 76      Three-line connection is shown as below:  Figure 20: 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.  Figure 21: Reference Design for UART Port with Hardware Flow Control  3.7.2.  Debug and Upgrade Port Debug port:    Two lines: DBG_TXD and DBG_RXD   Debug  port  is  used  for  firmware  debugging  and  upgrading,  its  baud  rate  must  be  configured  as 921600bps.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                39 / 76       Figure 22: The Connection of Firmware Debugging and Upgrade   Because  the  debug  port  uses  a  high  baud  rate  921600bps  configuration,  when  connecting  a  PC  for debugging and upgrading, the UART to USB mode is recommended. The test points for debug UART is recommended to be reserved, for detailed design, please refer to the document [12].  3.7.3.  UART Application VDD_EXT is the reference voltage level for UART of GC10, the 1K resistors is recommended to be added on the UART lines, the reference circuit is shown as below. This circuit is also applicable in 2.8V or 3.0V systems.  Figure 23: Level Match Design for 3.3V System  NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                40 / 76      The reference design for 5V level match is shown as below. The connection of dotted line can be referred to the connection of solid line. Please pay attention to the direction of signal. Input dotted line of module should be referred to input solid line of the module. Output dotted line of module should be referred to output solid line of the module.  As to the circuit below, VDD_EXT supplies power for the I/O of module, while VCC_MCU supplies power for the I/O of the peripheral.    Figure 24: Level Match Design for 5V System
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                41 / 76      The following circuit shows a reference design for the communication between module and PC. A RS232 level shifter IC or circuit must be inserted between module and PC, since the UART port does not support the RS232 level, but the CMOS level only.    Figure 25: Level Match Design for RS-232   For three-line UART port, the UART to USB mode can also be used.  3.8. Audio Interfaces  The module provides two analogy audio input channels and two analogy audio output channels.  Table 8: Pin Definition of Audio Interface Interfaces  Pin Name  Pin NO.  Description AIN1/AOUT1 MIC1P  20  Channel 1 microphone positive input MIC1N  19  Channel 1 microphone negative input NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                42 / 76       AIN1 and AIN2 can be used for input of microphone. 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. AOUT1 channel is a differential channel. If it is used as a speaker, an amplifier should be employed.  AOUT2 is used for output of earphone, which can be used as a single-ended channel. SPK2P and AGND can establish a pseudo differential mode.    All of these two audio channels support voice and ringtone output, and so on, and can be switched by “AT+QAUDCH” command. For more details, please refer to the document [1].  Use AT command “AT+QAUDCH” to select audio channel:      0--AIN1/AOUT1 (main audio channel), the default value is 0.   1--AIN2/AOUT2 (auxiliary audio channel), this channel is used for earphone.  For each channel, you can use AT+QMIC to adjust the input gain level of microphone. You can also use “AT+CLVL” to adjust the output gain level of receiver. “AT+QSIDET” is used to set the side-tone gain level. For more details, please refer to the document [1].  3.8.1.  Decrease TDD Noise and Other Noises The 47pF capacitor is applied for filtering out 900MHz RF interference when the module is transmitting at GSM900MHz. 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. Therefore, you would have to discuss with its capacitor  vendor  to  choose  the  most  suitable  capacitor  for  filtering  out  GSM850MHz,  GSM900MHz, DCS1800MHz and PCS1900MHz separately.    The severity degree of the RF interference in the voice channel during GSM transmitting period largely depends on the application design. In some cases, GSM900 TDD noise is more severe; while in other SPK1P  22  Channel 1 audio positive output SPK1N  21  Channel 1 audio negative output AIN2/AOUT2 MIC2P  18  Channel 2 microphone positive input MIC2N  17  Channel 2 microphone negative input SPK2P  16  Channel 2 audio single-ended output AGND  15  Form a pseudo-differential pair with SPK2P
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                43 / 76      cases, DCS1800 TDD noise is more obvious. Therefore, you can have a choice based on test results. Sometimes, even no RF filtering capacitor is required.  The capacitor which is used for filtering out RF noise should be close to audio interface. Audio alignment should be as short as possible.  In order to decrease radio or other signal interference, the position of RF antenna should be kept away from audio interface and audio alignment. Power alignment and audio alignment should not be parallel, and power alignment should be far away from audio alignment.  The differential audio traces have to be placed according to the differential signal layout rule.    3.8.2.  Microphone Interfaces Design AIN1  and AIN2  channels come with  internal bias  supply  for  external electret microphone.  A  reference circuit is shown in the following figure.    Figure 26: Reference Design for AIN1&AIN2   The ESD protection components on the MIC channels are strongly recommended.  NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                44 / 76      3.8.3.  Receiver Interface Design  Figure 27: Reference Receiver Interface Design of AOUT1  Figure 28: Speaker Interface with Amplifier Configuration of AOUT1  Texas  Instruments  TPA6205A1  is  recommended  for  a  suitable  differential  audio  amplifier.  There  are plenty of excellent audio amplifiers in the market.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                45 / 76       Figure 29: Reference Receiver Interface Design of AOUT2  Figure 30: Speaker Interface with Amplifier Configuration of AOUT2
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                46 / 76      3.8.4.  Earphone Interface Design  Figure 31: Earphone Interface Design  3.8.5.  Audio Characteristics Table 9: Typical Electret Microphone Characteristics  Table 10: Typical Audio Output Characteristics Parameter  Min.  Typ.  Max.  Unit Working Voltage  1.2  1.5  2.0  V Working Current  200    500  uA External Microphone Load Resistance    2.2    kΩ Parameter  Min.  Typ.  Max.  Unit AOUT1 (SPK1)  Single-ended  Load resistance    16    Ω Ref level  0    1.3  Vpp Differential Load resistance    16    Ω Ref level  0    2.6  Vpp
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                47 / 76       3.9. SIM Card Interface 3.9.1.  SIM Card Application The  SIM  interface  supports  the  functionality  of  the  GSM  Phase  1  specification  and  also  supports  the functionality of the new GSM Phase 2+ specification for FAST 64 kbps SIM card, which is intended to use with a SIM application Tool-kit.  The SIM interface is powered by an internal regulator in the module. Both 1.8V and 3.0V SIM Cards are supported.    Table 11: Pin Definition of the SIM Interface  Figure 32 is the reference circuit for SIM interface, and here an 8-pin SIM card holder is used.  The pin SIM_PRESENCE is used to detect whether the tray of the Molex SIM socket, which is used for holding  SIM  card,  is  presented  in  the  card  socket.  When  the  tray  is  inserted  in  the  socket, SIM_PRESENCE  is  in  low  level.  Regardless  of  the  SIM  card  is  in  the  tray  or  not,  the  change  of SIM_PRESENCE level from high to low prompts the module to initialize SIM card. In default configuration, SIM  card  detection  function  is  disabled.  Customer’s  application  can  use  “AT+QSIMDET=1,0”  and “AT+QSIMDET=0,0” to switch on and off the SIM card detection function. For details of this AT command, AOUT2 (SPK2)  Single-ended Load resistance    32    Ω Reference level  0    1.0  Vpp Maximum  Driving  Current Limit of SPK1 and SPK2 SPK1      80  mA SPK2      25  mA Pin Name  Pin NO.  Description 23  SIM_VDD  Supply power for SIM card. Automatic detection of SIM card voltage.  24  SIM_RST  SIM card reset. 25  SIM_DATA  SIM card data I/O. 26  SIM_CLK  SIM card clock. 27  SIM_GND  SIM card ground. 28  SIM_PRESENCE  SIM card detection
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                48 / 76      please refer to document [1]. When “AT+QSIMDET=1,0” is set and the tray with SIM card is removed from SIM socket, the following URC will be presented:       +CPIN: NOT INSERTED  When  the  tray  with  SIM  card  is  inserted  into  SIM  socket  again  and  the  module  finishes               reinitializing SIM card, the following URC will be presented:  +CPIN: READY  Call Ready  Figure 32: Reference Circuit for 8-pin SIM Card Holder   1.  Please  do  not  use  “AT+QSIMDET=1,1”  when  circuit  in  Figure  32  is  adopted,  which  can  cause  to reinitialize SIM card. 2.  When SIM card detection function is used, SIM_PRESENCE pin must be  pulled up by an  external resistor. If unused, please keep this pin open.         NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                49 / 76      The reference circuit for a 6-pin SIM card socket is illustrated as the following figure:  Figure 33: Reference Circuit for 6-pin SIM Card Holder  In order to enhance the reliability and availability of the SIM card in application. Please follow the criteria below in the SIM circuit design.    Keep layout of SIM card as close as possible to the module. Assure the possibility of the length of the trace is less than 100mm.     Keep SIM card signal away from RF and VBAT alignment.   Assure the ground between module and SIM cassette short and wide. Keep the width of ground no less than 0.5mm to maintain the same electric potential. The decouple capacitor of SIM_VDD is less than 1uF and must be near to SIM cassette.       To avoid cross talk between SIM_DATA and SIM_CLK. Keep them away with each other and shield them with surrounded ground.     In  order  to  offer  good  ESD  protection,  it  is  recommended  to  add  TVS  such  as  WILL (http://www.willsemi.com/) ESDA6V8AV6. The 22Ω resistors should be connected in series between the module and the SIM card so as to suppress the EMI spurious transmission and enhance the ESD protection. Please to be noted that the SIM peripheral circuit should be close to the SIM card socket.   Place the RF bypass capacitors (33pF) close to the SIM card on all signals line for improving EMI.     3.9.2.  SIM Cassette As to the 6-pin SIM card holder, it is recommended to use Amphenol C707 10M006 512 2. Please visit http://www.amphenol.com for more information.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                50 / 76       Figure 34: Amphenol C707 10M006 512 2 SIM Card Holder  Table 12: Pin Description of Amphenol SIM Card Holder  For 8-pin SIM card holder, it is recommended to use Molex 91228. Please visit http://www.molex.com for more information. Name  Pin  Description SIM_VDD  C1  SIM card power supply SIM_RST  C2  SIM card reset SIM_CLK  C3  SIM card clock GND  C5  Ground VPP  C6  Not connected SIM_DATA  C7  SIM card data I/O
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                51 / 76       Figure 35: Molex 91228 SIM Card Holder    Table 13: Pin Description of Molex SIM Card Holder Name  Pin  Description SIM_VDD  C1  SIM card power supply SIM_RST  C2  SIM card reset SIM_CLK  C3  SIM card clock SIM_PRESENCE C4  SIM card presence detection GND  C5  Ground VPP  C6  Not connect SIM_DATA  C7  SIM card data I/O SIM_DETECT  C8  Pull  down  GND  with  external  circuit. When  the tray is presented, C4 is connected to C8.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                52 / 76      3.10. PCM Interface  GC10 has reserved PCM interface, it is used as digital audio transmission between module and customer device.  This  interface  composes PCM_CLK,  PCM_SYNC,  PCM_IN  and  PCM_OUT signal  lines.  PCM function is not supported at present.  3.11. Behaviors of the RI Table 14: Behaviours of the RI  If the module is used as a caller, the RI would maintain high unless the URC or SMS is received. On the other hand, when it is used as a receiver, the timing of the RI is shown below:  Figure 36: RI Behaviour of Voice Calling as a Receiver State  RI Response   Standby  HIGH Voice Call 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. SMS  When  a  new  SMS  comes,  the  RI  changes  to  LOW  and  holds  low  level  for  about 120ms, then changes to HIGH. URC  Certain URCs can trigger 120ms low level on RI. For more details, please refer to the document [10].
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                53 / 76       Figure 37: RI Behaviour as a Caller  Figure 38: RI Behaviour 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 15: Working State of the NETLIGHT  State  Module Function Off  The module is not running. 64ms On/ 800ms Off  The module is not synchronized with network. 64ms On/ 2000ms Off  The module is synchronized with network. 64ms On/ 600ms Off  The GPRS data transmission after dialing the PPP connection.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                54 / 76      A reference circuit is shown as below:  Figure 39: Reference Design for NETLIGHT
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                55 / 76      4 Antenna Interface  The Pin 38 is the RF antenna pad. The RF interface has an impedance of 50Ω.    Table 16: Pin Definition of the RF_ANT  4.1. RF Reference Design  The reference design for RF is shown as below:  Figure 40: Reference Design for RF  GC10 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. GC10 comes with grounding pads which are next to the antenna pad in order to give a better grounding. Besides, a ∏ type match circuit is suggested to be used to adjust the RF performance. Pin Name    Pin NO.    Description GND  37  Ground RF_ANT  38  RF antenna pad GND  39  Ground
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                56 / 76      To minimize the loss on the RF trace and RF cable, take design into account carefully. It is recommended that the insertion loss should meet the following requirements:    GSM850/EGSM900 is <1dB.     DCS1800/PCS1900 is <1.5dB.  4.2. RF Output Power Table 17: The Module Conducted RF Output Power  4.3. RF Receiving Sensitivity Table 18: The Module Conducted RF Receiving Sensitivity   Frequency          Max.  Min. GSM850  33dBm±2dB  5dBm±5dB EGSM900  33dBm±2dB  5dBm±5dB DCS1800  30dBm±2dB  0dBm±5dB PCS1900  30dBm±2dB  0dBm±5dB Frequency    Receive Sensitivity GSM850  < -108dBm EGSM900  < -108dBm DCS1800  < -108dBm PCS1900  < -108dBm
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                57 / 76      4.4. Operating Frequencies Table 19: The Module Operating Frequencies  4.5. 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 41: RF Soldering Sample   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
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                58 / 76      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 20: Absolute Maximum Ratings           Parameter  Min.  Max.  Unit VBAT  -0.3  5.0  V Peak current of power supply  0  2  A RMS current of power supply (during one TDMA- frame)  0  0.8  A Voltage at digital pins  -0.3  3.3  V Voltage at analog pins  -0.3  3.3  V Voltage at digital/analog pins in power down mode  -0.25  0.25  V
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                59 / 76      5.2. Operating Temperature  The operating temperature is listed in the following table:  Table 21: Operating Temperature  5.3. Power Supply Ratings Table 22: The Module Power Supply Ratings Parameter  Min.  Typ.  Max.  Unit Normal Temperature  -35  +25  +80  ℃ Restricted Operation  -40 ~ -35    +80 ~ +85  ℃ Storage Temperature  -45    +90  ℃ Parameter Description  Conditions  Min. Typ.  Max.  Unit VBAT Supply voltage Voltage must stay within the min/max values, including voltage drop, ripple, and spikes. 3.3  4.0  4.6  V Voltage drop during transmitting burst Maximum power control level on GSM850 and GSM900.      400  mV Voltage ripple Maximum power control level on GSM850 and GSM900 @ f<200kHz @ f>200kHz      50                       20   mV mV           Average supply current Power down mode   Sleep mode @ DRX=5   120 1.3   uA mA Minimum functionality mode AT+CFUN=0               Idle mode               Sleep mode AT+CFUN=4               Idle mode               Sleep mode     21 0.8  21 0.8     mA mA  mA mA Talk mode
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                60 / 76        1.  1) Power control level PCL 5. 2.  2) Power control level PCL 0.  5.4. Current Consumption  The values of current consumption are shown as below:  Table 23: The Module Current Consumption IVBAT   GSM850/EGSM9001)   DCS1800/PCS19002) 211/208 156/165   mA mA DATA mode, GPRS (3Rx/2Tx) GSM850/EGSM9001) DCS1800/PCS19002)     372/367 245/285    mA mA DATA mode, GPRS (4Rx/1Tx) GSM850/EGSM9001) DCS1800/PCS19002)   224/220 162/182   mA mA Peak supply current (during transmission slot) Maximum power control level on GSM850/GSM900.    1.6  1.8  A Condition  Current Consumption Voice Call GSM850  @power level #5 <300mA,Typical 211mA @power level #12,Typical 86mA @power level #19,Typical 64mA GSM900  @power level #5 <300mA,Typical 208mA @power level #12,Typical 85mA @power level #19,Typical 64mA DCS1800  @power level #0 <250mA,Typical 156mA @power level #7,Typical 75mA @power level #15,Typical 64mA PCS1900  @power level #0 <250mA,Typical 165mA @power level #7,Typical 80mA @power level #15,Typical 64mA GPRS Data NOTES
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                61 / 76       5.5. Electro-static Discharge  Although the GSM engine is generally protected against Electro-static Discharge (ESD), ESD protection precautions should still be emphasized. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any applications using the module.    The measured ESD values of module are shown as the following table:  DATA mode, GPRS ( 3 Rx/2 Tx ) CLASS 10 GSM850  @power level #5 <550mA,Typical 372mA @power level #12,Typical 132mA @power level #19,Typical 90mA EGSM 900  @power level #5 <550mA,Typical 367mA @power level #12,Typical 134mA @power level #19,Typical 92mA DCS 1800  @power level #0 <450mA,Typical 245mA @power level #7,Typical 113mA @power level #15,Typical 90mA PCS 1900  @power level #0 <450mA,Typical 285mA @power level #7,Typical 121mA @power level #15,Typical 90mA DATA mode, GPRS ( 4 Rx/1 Tx ) CLASS 10 GSM850  @power level #5 <350mA,Typical 224mA @power level #12,Typical 103mA @power level #19,Typical 82mA EGSM 900  @power level #5 <350mA,Typical 220mA @power level #12,Typical103mA @power level #19,Typical 82mA DCS 1800  @power level #0 <300mA,Typical 162mA @power level #7,Typical 96mA @power level #15,Typical 85mA PCS 1900  @power level #0 <300mA,Typical 182mA @power level #7,Typical 100mA @power level #15,Typical 85mA
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                62 / 76      Table 24: The ESD Endurance (Temperature: 25℃, Humidity: 45 %) Tested Point  Contact Discharge  Air Discharge VBAT/GND  ±6KV  ±12KV RF_ANT  ±4KV  ±12KV RXD/TXD  ±2KV  ±4KV Others  ±0.5KV  ±1KV
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                63 / 76      6 Mechanical Dimensions  This chapter describes the mechanical dimensions of the module.  6.1. Mechanical Dimensions of Module  Figure 42: GC10 Module Top and Side Dimensions (Unit: mm)
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                64 / 76       Figure 43: GC10 Module Bottom Dimensions (Unit: mm)
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                65 / 76      6.2. Recommended Footprint  keepout area Figure 44: Recommended Footprint (Unit: mm)   1.  In order to maintain the module, keep about 3mm between the module and other components in the  host PCB. 2.  Keep out area in above figure is forbidden to pour ground copper. Since the RF test point is in this area, please avoid generating parasitic capacitance between RF test point and ground.  NOTES
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                66 / 76      7 Storage and Manufacturing  7.1. Storage  GC10 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 <40℃  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 ≤30℃  temperature and <60% RH.   Stored at <10% RH.  Devices require baking before mounting, if any circumstance below occurs.    When the ambient temperature  is  23℃±5℃, humidity indication card shows  the humidity is >10% before opening the vacuum-sealed bag.    If  ambient  temperature  is  <30℃  and  the  humidity  is  <60%,  the  devices  have  not  been  mounted during 72hours.   Stored at >10% RH after opening the vacuum-sealed bag.  If baking is required, devices should be baked for 48 hours at 125℃±5℃.   As  plastic  container  cannot  be  subjected  to  high  temperature,  devices  must  be  removed  before  high temperature (125℃) bake. If shorter bake times are desired, please refer to the IPC/JEDECJ-STD-033 for bake procedure. NOTE
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                67 / 76      7.2. Soldering  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 GC10.  Figure 45: The Picture of Printing Paste
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                68 / 76      It is suggested that peak reflow temperature is from 235 ºC to 245ºC (for SnAg3.0Cu0.5 alloy). Absolute max reflow temperature  is 260ºC. To avoid damaging  the module  when it  was repeatedly heated, it  is suggested  that  the  module  should  be  mounted  after  the  first  panel  has  been  reflowed.  The  following picture is the actual diagram which we have operated.  Figure 46: Ramp-Soak-Spike Reflow Profile  7.3. Packaging  The modules are stored inside a vacuum-sealed bag which is ESD-protected. It should not be opened until the devices are ready to be soldered onto the application.  7.3.1.  Tape and Reel Packaging The reel is 330mm in diameter and each reel contains 250 modules.
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                69 / 76       Figure 47: Dimensions of Tape Plastic trayOut direction Figure 48: Dimensions of Reel
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                70 / 76      8 Appendix A Reference  Table 25: Related Documents    SN  Document Name  Remark [1]  GC10_AT_Commands_Manual  AT commands manual [2]  ITU-T Draft new recommendation V.25ter Serial asynchronous automatic dialing and control [3]  GSM 07.07  Digital cellular  telecommunications  (Phase  2+);  AT command set for GSM Mobile Equipment (ME) [4]  GSM 07.10  Support GSM 07.10 multiplexing protocol   [5]  GSM 07.05 Digital cellular telecommunications (Phase 2+); Use of  Data  Terminal  Equipment–Data  Circuit terminating  Equipment  (DTE–DCE)  interface  for Short Message  Service (SMS)  and  Cell  Broadcast Service (CBS) [6]  GSM 11.14 Digital  cellular  telecommunications  (Phase  2+); Specification  of  the  SIM  application  toolkit  for  the Subscriber  Identity  module–Mobile  Equipment (SIM–ME) interface [7]  GSM 11.11 Digital  cellular  telecommunications  (Phase  2+); Specification  of  the  Subscriber  Identity  module  – Mobile Equipment (SIM–ME) interface [8]  GSM 03.38  Digital  cellular  telecommunications  (Phase  2+); Alphabets and language-specific information [9]  GSM 11.10 Digital  cellular  telecommunications  (Phase  2); Mobile Station (MS) conformance specification; Part 1: Conformance specification [10]  GSM_UART_AN  UART port application note [11]  M10_EVB_UGD  M10 EVB user guide [12]  GSM_FW_Upgrade_AN01  GSM Firmware upgrade application note
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                71 / 76      Table 26: Terms and Abbreviations Abbreviation    Description AMR  Adaptive Multi-Rate ARP   Antenna Reference Point ASIC    Application Specific Integrated Circuit BER   Bit Error Rate BOM  Bill of Material BTS    Base Transceiver Station CHAP    Challenge Handshake Authentication Protocol CS    Coding Scheme CSD    Circuit Switched Data CTS    Clear to Send DRX    Discontinuous Reception DCE  Data Communications Equipment (typically module) DTE    Data Terminal Equipment (typically computer, external controller) DTR    Data Terminal Ready DTX    Discontinuous Transmission EFR    Enhanced Full Rate EGSM    Enhanced GSM EMC    Electromagnetic Compatibility EMI  Electromagnetic Interference ESD    Electrostatic Discharge ETS    European Telecommunication Standard FCC    Federal Communications Commission (U.S.) FDMA    Frequency Division Multiple Access
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                72 / 76      FR    Full Rate FTP  File Transfer Protocol GMSK  Gaussian Minimum Shift Keying GPRS    General Packet Radio Service GSM    Global System for Mobile Communications HR    Half Rate HTTP  Hypertext Transport Protocol IMEI    International Mobile Equipment Identity MO    Mobile Originated MS    Mobile Station (GSM engine) MT    Mobile Terminated PAP    Password Authentication Protocol PBCCH    Packet Switched Broadcast Control Channel PCB    Printed Circuit Board PDU    Protocol Data Unit PDP  Packet Data Protocol PPP    Point-to-Point Protocol RF    Radio Frequency RMS    Root Mean Square (value) RTC    Real Time Clock RX    Receive Direction SIM    Subscriber Identification Module SMS    Short Message Service SMTP  Simple Mail Transfer Protocol TDMA    Time Division Multiple Access
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                73 / 76        TE    Terminal Equipment TX    Transmitting Direction UART  Universal Asynchronous Receiver &Transmitter UDP  User Datagram Protocol URC    Unsolicited Result Code USSD    Unstructured Supplementary Service Data VSWR    Voltage Standing Wave Ratio Phonebook Abbreviations FD  SIM Fix Dialing Phonebook LD    SIM Last Dialing Phonebook (list of numbers most recently dialed) ON  SIM (or ME) Own Numbers (MSISDNs) List SM    SIM Phonebook
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                74 / 76      9 Appendix B GPRS Coding Scheme  Four  coding  schemes  are  used  in  GPRS  protocol.  The  differences  between  them  are  shown  in  the following table:  Table 27: Description of Different Coding Schemes  Radio block structure of CS-1, CS-2 and CS-3 is shown as the figure below:                 Figure 49: Radio Block Structure of CS-1, CS-2 and CS-3 Scheme  Code Rate  USF Pre- coded USF Radio Block excl.USF and BCS BCS  Tail Coded Bits Punctured Bits Data Rate Kb/s CS-1  1/2  3  3  181  40  4  456  0  9.05 CS-2  2/3  3  6  268  16  4  588  132  13.4 CS-3  3/4  3  6  312  16  4  676  220  15.6 CS-4  1  3  12  428  16  -  456  -  21.4 Rate 1/2 convolutional coding Puncturing 456 bits USF BCS Radio Block
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                75 / 76      Radio block structure of CS-4 is shown as the following figure:          Figure 50: Radio Block Structure of CS-4                         BlockCode No codingUSF BCS Radio Block456 bits
                                                                         GSM/GPRS  Module  Series                                                                 GC10 Hardware Design  GC10_Hardware_Design                                  Confidential / Released                                                76 / 76      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. The active  slots determine the total number of slots the GPRS device can use simultaneously for both uplink and downlink communications.    The description of different multi-slot classes is shown in the following table:  Table 28: GPRS Multi-slot Classes   Multislot Class  Downlink Slots  Uplink Slots  Active Slots 1  1  1  2 2  2  1  3 3  2  2  3 4  3  1  4 5  2  2  4 6  3  2  4 7  3  3  4 8  4  1  5 9  3  2  5 10  4  2  5 11  4  3  5 12  4  4  5

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