GC65 Hardware Design GSM/GPRS Module Series Rev. GC65_Hardware_Design_V2.0 Date: 2014-01-09 www.quectel.
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GSM/GPRS Module Series GC65 Hardware Design About the Document History Revision Date Author Description 1.0 2013-12-09 King HAO Initial King HAO 1. Update Figure 2:Pin assignment. 2. Modified the mechanical dimensions and the recommended footprint of the module in Chapter 6. 3. Update the function of SIM card detection. 2.
GSM/GPRS Module Series GC65 Hardware Design Contents About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ..................................................................................................................................
GSM/GPRS Module Series GC65 Hardware Design 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................................................................
GSM/GPRS Module Series GC65 Hardware Design 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 .......................
GSM/GPRS Module Series GC65 Hardware Design Figure Index FIGURE 1: MODULE FUNCTIONAL DIAGRAM ............................................................................................... 14 FIGURE 2: PIN ASSIGNMENT ......................................................................................................................... 16 FIGURE 3: VOLTAGE DROP DURING TRANSMITTING .................................................................................
GSM/GPRS Module Series GC65 Hardware Design FIGURE 42: GC65 MODULE TOP AND SIDE DIMENSIONS (UNIT: MM)....................................................... 63 FIGURE 43: GC65 MODULE BOTTOM DIMENSIONS (UNIT: MM) ................................................................ 64 FIGURE 44: RECOMMENDED FOOTPRINT (UNIT: MM) ................................................................................ 65 FIGURE 45: TOP VIEW OF THE MODULE .....................................................................
GSM/GPRS Module Series GC65 Hardware Design 1 Introduction This document defines the GC65 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 GC65 module to design and set up mobile applications easily. 1.1.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 2 Product Concept 2.1. General Description GC65 is a Quad-band GSM/GPRS engine that works at frequencies of GSM850MHz, GSM900MHz, DCS1800MHz and PCS1900MHz. The GC65 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.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 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 NOTE 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.
GSM/GPRS Module Series GC65 Hardware Design Figure 1: Module Functional Diagram 2.5. Evaluation Board In order to help you to develop applications with GC65, 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 GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 3.1. Pin of Module 3.1.1.
GSM/GPRS Module Series GC65 Hardware Design 3.1.2. Pin Description Table 3: Pin Description Power Supply Pin Name VBAT VRTC Pin NO. 33,34 13 VDD_EXT 29 GND 32,35, 36,37, 39 I/O Description DC Characteristics Comment 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. I/O Power supply for RTC when VBAT is not supplied for the system.
GSM/GPRS Module Series GC65 Hardware Design 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. I/O Description DC Characteristics Comment O Network status indication VOLmin=0V VOLmax= 0.3×VDD_EXT VOHmin= 0.
GSM/GPRS Module Series GC65 Hardware Design UART Port Pin Name Pin NO. I/O Description RI 6 O Ring indication 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 Pin NO. I/O DC Characteristics Comment VILmin=0V VILmax= 0.3×VDD_EXT VIHmin= 0.7×VDD_EXT VIHmax= VDD_EXT VOLmin=0V VOLmax= 0.3×VDD_EXT VOHmin= 0.
GSM/GPRS Module Series GC65 Hardware Design SIM_DATA 24 O SIM data SIM_ RST 25 I/O SIM reset SIM_CLK 26 O SIM clock SIM_GND 27 SIM_ PRESENCE 28 array. Maximum trace length is 100mm from the module pad to SIM card holder. SIM ground I SIM card detection VILmin=0V VILmax= 0.3×VDD_EXT VIHmin= 0.7×VDD_EXT VIHmax= VDD_EXT I/O Description DC Characteristics Comment VILmin=0V VILmax= 0.3×VDD_EXT VIHmin= 0.7×VDD_EXT VIHmax= VDD_EXT VOLmin=0V VOLmax= 0.3×VDD_EXT VOHmin= 0.
GSM/GPRS Module Series GC65 Hardware Design 3.2. Operating Modes The table below briefly summarizes the various operating modes in the following chapters. Table 4: Overview of Operating Modes Mode Normal Operation Mode Function 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.
GSM/GPRS Module Series GC65 Hardware Design NOTE 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.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 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).
GSM/GPRS Module Series GC65 Hardware Design 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 NOTE GC65 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.
GSM/GPRS Module Series GC65 Hardware Design The turn-on timing is illustrated as the following figure: T1 VBAT EMERG_OFF (INPUT) >1s PWRKEY (INPUT) VIH > 2.3V VIL< 2.0V >10ms VDD_EXT (OUTPUT) NETLIGHT (OUTPUT) MODULE STATUS >910ms OFF BOOTING RUNNING Figure 9: Turn-on Timing NOTES 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.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 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”.
GSM/GPRS Module Series GC65 Hardware Design 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 S2 EMERG_OFF TVS2 Close to S2 Figure 12: Reference Circuit for EMERG_OFF by Button Be cautious to use the pin EMERG_OFF.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 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. NOTE DTR pin should be kept in low level during communication between the module and DTE. 3.5.4.
GSM/GPRS Module Series GC65 Hardware Design 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 GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 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 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 Table 7: Pin Definition of the UART Interfaces Interfaces UART Port Pin Name Pin NO.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design NOTE 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.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design Figure 22: The Connection of Firmware Debugging and Upgrade NOTE 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.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 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 NOTE For three-line UART port, the UART to USB mode can also be used. 3.8.
GSM/GPRS Module Series GC65 Hardware Design SPK1P 22 Channel 1 audio positive output SPK1N 21 Channel 1 audio negative output 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 AIN2/AOUT2 AIN1 and AIN2 can be used for input of microphone. An electret microphone is usually used. AIN1 and AIN2 are both differential input channels.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 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 GC65 Hardware Design Figure 29: Reference Receiver Interface Design of AOUT2 Figure 30: Speaker Interface with Amplifier Configuration of AOUT2 GC65_Hardware_Design Confidential / Released 45 / 76
GSM/GPRS Module Series GC65 Hardware Design 3.8.4. Earphone Interface Design Figure 31: Earphone Interface Design 3.8.5. Audio Characteristics Table 9: Typical Electret Microphone 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 Table 10: Typical Audio Output Characteristics Parameter Min. Typ. Max.
GSM/GPRS Module Series GC65 Hardware Design Load resistance AOUT2 (SPK2) 32 Ω Single-ended Reference level Maximum Driving Current Limit of SPK1 and SPK2 0 1.0 Vpp SPK1 80 mA SPK2 25 mA 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.
GSM/GPRS Module Series GC65 Hardware Design 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 NOTE 1.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design Figure 34: Amphenol C707 10M006 512 2 SIM Card Holder Table 12: Pin Description of Amphenol 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 GND C5 Ground VPP C6 Not connected SIM_DATA C7 SIM card data I/O For 8-pin SIM card holder, it is recommended to use Molex 91228. Please visit http://www.molex.com for more information.
GSM/GPRS Module Series GC65 Hardware Design 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 GC65 Hardware Design 3.10. PCM Interface GC65 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 State RI Response Standby HIGH Voice Call Change to LOW, then: 1. Change to HIGH when call is established. 2.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design A reference circuit is shown as below: Figure 39: Reference Design for NETLIGHT GC65_Hardware_Design Confidential / Released 54 / 76
GSM/GPRS Module Series GC65 Hardware Design 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 Pin Name Pin NO. Description GND 37 Ground RF_ANT 38 RF antenna pad GND 39 Ground 4.1. RF Reference Design The reference design for RF is shown as below: Figure 40: Reference Design for RF GC65 provides an RF antenna pad for antenna connection.
GSM/GPRS Module Series GC65 Hardware Design 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 Frequency Max. Min. GSM850 33dBm±2dB 5dBm±5dB EGSM900 33dBm±2dB 5dBm±5dB DCS1800 30dBm±2dB 0dBm±5dB PCS1900 30dBm±2dB 0dBm±5dB 4.3.
GSM/GPRS Module Series GC65 Hardware Design 4.4. Operating Frequencies Table 19: The Module Operating Frequencies Frequency Receive Transmit ARFCH GSM850 869~894MHz 824~849MHz 128~251 EGSM900 925~960MHz 880~915MHz 0~124, 975~1023 DCS1800 1805~1880MHz 1710~1785MHz 512~885 PCS1900 1930~1990MHz 1850~1910MHz 512~810 4.5. RF Cable Soldering Soldering the RF cable to RF pad of module correctly will reduce the loss on the path of RF, please refer to the following example of RF soldering.
GSM/GPRS Module Series GC65 Hardware Design 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.
GSM/GPRS Module Series GC65 Hardware Design 5.2. Operating Temperature The operating temperature is listed in the following table: Table 21: Operating Temperature Parameter Min. Typ. Max. Unit Normal Temperature -35 +25 +80 ℃ Restricted Operation -40 ~ -35 +80 ~ +85 ℃ Storage Temperature -45 +90 ℃ 5.3. Power Supply Ratings Table 22: The Module Power Supply Ratings Parameter VBAT Description Conditions Min. Typ. Max.
GSM/GPRS Module Series GC65 Hardware Design Sleep mode IVBAT Peak supply current (during transmission slot) 0.8 mA Talk mode 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 Maximum power control level on GSM850/GSM900. 1.6 1.8 A NOTES 1. 2. 1) 2) Power control level PCL 5. Power control level PCL 0. 5.4.
GSM/GPRS Module Series GC65 Hardware Design PCS1900 @power level #0 <250mA,Typical 165mA @power level #7,Typical 80mA @power level #15,Typical 64mA GPRS Data 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,Ty
GSM/GPRS Module Series GC65 Hardware Design The measured ESD values of module are shown as the following table: 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.
GSM/GPRS Module Series GC65 Hardware Design 6 Mechanical Dimensions This chapter describes the mechanical dimensions of the module. 6.1.
GSM/GPRS Module Series GC65 Hardware Design Figure 43: GC65 Module Bottom Dimensions (Unit: mm) GC65_Hardware_Design Confidential / Released 64 / 76
GSM/GPRS Module Series GC65 Hardware Design 6.2. Recommended Footprint kee t pou a are Figure 44: Recommended Footprint (Unit: mm) NOTES 1. 2. In order to maintain the module, keep about 3mm between the module and other components in the host PCB. 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.
GSM/GPRS Module Series GC65 Hardware Design 6.3. Top View of the Module Figure 45: Top View of the Module 6.4.
GSM/GPRS Module Series GC65 Hardware Design 7 Storage and Manufacturing 7.1. Storage GC65 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.
GSM/GPRS Module Series GC65 Hardware Design 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 GC65.
GSM/GPRS Module Series GC65 Hardware Design 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 48: Ramp-Soak-Spike Reflow Profile 7.3.
GSM/GPRS Module Series GC65 Hardware Design Figure 49: Dimensions of Tape Out direction Plastic tray Figure 50: Dimensions of Reel GC65_Hardware_Design Confidential / Released 70 / 76
GSM/GPRS Module Series GC65 Hardware Design 8 Appendix A Reference Table 25: Related Documents SN Document Name Remark [1] GC65_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 GSM 07.
GSM/GPRS Module Series GC65 Hardware Design 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 Equipm
GSM/GPRS Module Series GC65 Hardware Design 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 Proto
GSM/GPRS Module Series GC65 Hardware Design 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 GC65_Hardware_Design Confidentia
GSM/GPRS Module Series GC65 Hardware Design 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 excl.USF and BCS BCS Scheme Code Rate USF Precoded USF 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.
GSM/GPRS Module Series GC65 Hardware Design Radio block structure of CS-4 is shown as the following figure: Radio Block BCS USF Block Code No coding 456 bits Figure 52: Radio Block Structure of CS-4 GC65_Hardware_Design Confidential / Released 76 / 76
GSM/GPRS Module Series GC65 Hardware Design 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.