M66 Hardware Design GSM/GPRS Module Series Rev. M66_Hardware_Design_V1.
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GSM/GPRS Module Series M66 Hardware Design About the Document History Revision Date Author Description 1.0 2014-08-07 Felix YIN Initial Felix YIN 1. Modified output power of Bluetooth 2. Modified the timing of the RFTXMON signal 3. Updated Figure 5: Reference circuit for power supply 4. Modified description of RTC and SIM card interface 5. Modified description of UART Application 6. Deleted the over-voltage automatic shutdown function 7. Modified the antenna gain in the Table 24 8.
GSM/GPRS Module Series M66 Hardware Design Contents About the Document ................................................................................................................................ 2 Contents .................................................................................................................................................... 3 Table Index .........................................................................................................................................
GSM/GPRS Module Series M66 Hardware Design 3.7.3. Auxiliary UART Port ..................................................................................................... 41 3.7.4. UART Application ......................................................................................................... 41 3.8. Audio Interfaces .................................................................................................................... 43 3.8.1. Decrease TDD Noise and other Noise ...................
GSM/GPRS Module Series M66 Hardware Design 7.3.1. Tape and Reel Packaging ............................................................................................ 81 8 Appendix A References .................................................................................................................. 83 9 Appendix B GPRS Coding Schemes ............................................................................................. 88 10 Appendix C GPRS Multi-slot Classes .............................
GSM/GPRS Module Series M66 Hardware Design Table Index TABLE 1: MODULE KEY FEATURES ..................................................................................................... 13 TABLE 2: CODING SCHEMES AND MAXIMUM NET DATA RATES OVER AIR INTERFACE ............... 15 TABLE 3: IO PARAMETERS DEFINITION .............................................................................................. 19 TABLE 4: PIN DESCRIPTION ............................................................................
GSM/GPRS Module Series M66 Hardware Design Figure Index FIGURE 1: MODULE FUNCTIONAL DIAGRAM ..................................................................................... 16 FIGURE 2: PIN ASSIGNMENT ............................................................................................................... 18 FIGURE 3: VOLTAGE RIPPLE DURING TRANSMITTING ..................................................................... 25 FIGURE 4: REFERENCE CIRCUIT FOR THE VBAT INPUT .........................
GSM/GPRS Module Series M66 Hardware Design FIGURE 42: M66 MODULE TOP AND SIDE DIMENSIONS (UNIT: MM) ................................................ 75 FIGURE 43: M66 MODULE BOTTOM DIMENSIONS (UNIT: MM) ......................................................... 76 FIGURE 44: RECOMMENDED FOOTPRINT (UNIT: MM) ...................................................................... 77 FIGURE 45: TOP VIEW OF THE MODULE ............................................................................................
GSM/GPRS Module Series M66 Hardware Design 1 Introduction This document defines the M66 module and describes its hardware interface which are connected with the customer application and the air interface. This document can help you quickly understand module interface specifications, electrical and mechanical details. Associated with application note and user guide, you can use M66 module to design and set up mobile applications easily.
GSM/GPRS Module Series M66 Hardware Design 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 M66 module. Manufacturers of the cellular terminal should send the following safety information to users and operating personnel, and incorporate these guidelines into all manuals supplied with the product.
GSM/GPRS Module Series M66 Hardware Design Switch off the cellular terminal or mobile before boarding an aircraft. Make sure it is switched off. The operation of wireless appliances in an aircraft is forbidden, so as 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 Airplane Mode which must be enabled prior to boarding an aircraft.
GSM/GPRS Module Series M66 Hardware Design 2 Product Concept 2.1. General Description M66 is a Quad-band GSM/GPRS engine that works at frequencies of GSM850MHz, EGSM900MHz, DCS1800MHz and PCS1900MHz. The M66 features GPRS multi-slot class 12 and supports the GPRS coding schemes CS-1, CS-2, CS-3 and CS-4. For more details about GPRS multi-slot classes and coding schemes, please refer to the Appendix B & C. With a tiny profile of 15.8mm × 17.7mm × 2.
GSM/GPRS Module Series M66 Hardware Design The following table describes the detailed features of M66 module. Table 1: Module Key Features Feature Implementation Power Supply Single supply voltage: 3.3V ~ 4.6V Typical supply voltage: 4V Power Saving Typical power consumption in SLEEP mode: 1.3 mA @DRX=5 1.
GSM/GPRS Module Series M66 Hardware Design Full Rate (ETS 06.10) Enhanced Full Rate (ETS 06.50/06.60/06.
GSM/GPRS Module Series M66 Hardware Design temperature levels, the module will meet 3GPP compliant again. Table 2: Coding Schemes and Maximum Net Data Rates over Air Interface 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 2.3. Functional Diagram The following figure shows a block diagram of M66 and illustrates the major functional parts.
GSM/GPRS Module Series M66 Hardware Design Figure 1: Module Functional Diagram 2.4. Evaluation Board In order to help you to develop applications with M66, Quectel supplies an evaluation board (EVB), RS-232 to USB cable, power adapter, earphone, antenna and other peripherals to control or test the module. For details, please refer to the document [11].
GSM/GPRS Module Series M66 Hardware Design 3 Application Interface The module adopts LCC package and has 44 pins. The following chapters provide detailed descriptions about these pins.
GSM/GPRS Module Series M66 Hardware Design 3.1. Pin of Module 3.1.1. Pin Assignment Figure 2: Pin Assignment NOTE Keep all reserved pins open.
GSM/GPRS Module Series M66 Hardware Design 3.1.2. Pin Description Table 3: IO Parameters Definition Type Description IO Bidirectional input/output DI Digital input DO Digital output PI Power input PO Power output AI Analog input AO Analog output Table 4: Pin Description Power Supply PIN Name VBAT PIN No. 42,43 I/O PI Description Main power supply of module: VBAT=3.3V~4.6V VRTC 44 IO Power supply for RTC when VBAT is not supplied for the system.
GSM/GPRS Module Series M66 Hardware Design EXT GND external circuit. 27,34 36,37 40,41 VOmin=2.7V VOnorm=2.8V IOmax=20mA keep this pin open. 2. Recommend to add a 2.2~4.7uF bypass capacitor, when using this pin for power supply. Ground Turn on/off PIN Name PWRKEY PIN No. 7 I/O Description DC Characteristics DI Power on/off key. PWRKEY should be pulled down for a moment to turn on or turn off the system. VILmax= 0.1×VBAT VIHmin= 0.6×VBAT VIHmax=3.
GSM/GPRS Module Series M66 Hardware Design PIN Name PIN No. I/O Description DC Characteristics Comment If unused, keep this pin open. 16 DO Network status indication VOHmin= 0.85×VDD_EXT VOLmax= 0.15×VDD_EXT PIN Name PIN No.
GSM/GPRS Module Series M66 Hardware Design SIM_ DATA 11 SIM_ RST 12 SIM_ GND 10 IO DO VOHmin= 0.85×SIM_VDD VILmax= 0.25×SIM_VDD VIHmin= 0.75×SIM_VDD VOLmax= 0.15×SIM_VDD VOHmin= 0.85×SIM_VDD SIM data diode array. Maximum trace length is 200mm from the module pad to SIM card holder. VOLmax= 0.15×SIM_VDD VOHmin= 0.85×SIM_VDD SIM reset SIM ground ADC PIN Name I/O Description DC Characteristics Comment PO Reference voltage of ADC circuit VOmax=2.9V VOmin=2.7V VOnorm=2.
GSM/GPRS Module Series M66 Hardware Design BT_ ANT 26 IO BT antenna pad Impedance of 50Ω If unused, keep this pin open. Description DC Characteristics Comment Transmission signal indication VOHmin= 0.85×VDD_EXT VOLmax= 0.15×VDD_EXT If unused, keep this pin open. DC Characteristics Comment Transmitting Signal Indication PIN Name RFTXMON PIN No. 25 I/O DO Other Interface PIN Name PIN No. RESERVED 15 I/O Description Keep these pins open. 3.2.
GSM/GPRS Module Series M66 Hardware Design 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.
GSM/GPRS Module Series M66 Hardware Design Figure 3: Voltage Ripple 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 burst transmission. If the power voltage drops below 3.3V, the module could turn off automatically. For better power performance, it is recommended to place a 100uF tantalum capacitor with low ESR (ESR=0.
GSM/GPRS Module Series M66 Hardware Design 3.3.3. Reference Design For Power Supply The power design for the module is very important, since the performance of power supply for the module largely depends on the power source. The power supply is capable of providing the sufficient current up to 2A at least. 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.
GSM/GPRS Module Series M66 Hardware Design For details, please refer to the 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. An open collector driver circuit is suggested to control the PWRKEY. A simple reference circuit is illustrated as below. Figure 6: Turn on the Module with an Open-collector Driver NOTES 1. M66 module is set to autobauding mode (AT+IPR=0) by default.
GSM/GPRS Module Series M66 Hardware Design placed nearby the button. When pressing the key, electrostatic strike may generate from finger. A reference circuit is shown in the following figure. Figure 7: Turn on the Module with a Button The turn-on timing is illustrated as the following figure. Figure 8: Turn-on Timing NOTE Make sure that VBAT is stable before pulling down PWRKEY pin. The time of T1 is recommended to be 100ms.
GSM/GPRS Module Series M66 Hardware Design 3.4.2. Power Down The following procedures can be used to turn off the module: Normal power down procedure: Turn off module using the PWRKEY pin Normal power down procedure: Turn off module using command AT+QPOWD Under-voltage automatic shutdown: Take effect when under-voltage is detected. 3.4.2.1. Power Down Module Using 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 M66 Hardware Design 1. 2. This unsolicited result codes do not appear when autobauding is active and DTE and DCE are not correctly synchronized after start-up. The module is recommended to set to a fixed baud rate. As logout network time is related to the local mobile network, it is recommended to delay about 12 seconds before disconnecting the power supply or restarting the module. 3.4.2.2.
GSM/GPRS Module Series M66 Hardware Design NOTE These unsolicited result codes do not appear when autobauding is active and DTE and DCE are not correctly synchronized after start-up. The module is recommended to set to a fixed baud rate. 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.
GSM/GPRS Module Series M66 Hardware Design 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 be not available.
GSM/GPRS Module Series M66 Hardware Design 3.5.4. Summary of State Transition Table 6: Summary of State Transition Next Mode Current Mode Power Down Power Down Normal Mode Sleep Mode Use PWRKEY Normal Mode AT+QPOWD, use PWRKEY pin SLEEP Mode Use PWRKEY pin Use AT command AT+QSCLK=1 and pull up DTR Pull DTR down or incoming call or SMS or GPRS 3.6. RTC Backup The RTC (Real Time Clock) function is supported. The RTC is designed to work with an internal power supply.
GSM/GPRS Module Series M66 Hardware Design Figure 11: VRTC is Supplied by a Non-chargeable Battery Figure 12: VRTC is Supplied by a Rechargeable Battery M66_Hardware_Design Confidential / Released 34 / 82
GSM/GPRS Module Series M66 Hardware Design Figure 13: VRTC is Supplied by a Capacitor A rechargeable or non-chargeable coin-cell battery can also be used here, for more information, please visit http://www.sii.co.jp/en/. NOTE If you want to keep an accurate real time, please keep the main power supply VBAT alive. 3.7. Serial Interfaces The module provides three serial ports: UART Port, Debug Port and Auxiliary UART Port.
GSM/GPRS Module Series M66 Hardware Design RI: Ring indicator (when there is a call, SMS or URC output, the module will inform DTE with the RI pin). DCD: Data carrier detection (the validity of this pin demonstrates the communication link is set up). NOTE Hardware flow control is disabled 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.
GSM/GPRS Module Series M66 Hardware Design RXD 18 Receive data DTR 19 Data terminal ready RI 20 Ring indication DCD 21 Data carrier detection CTS 22 Clear to send RTS 23 Request to send DBG_RXD 38 Receive data DBG_TXD 39 Transmit data RXD_AUX 28 Receive data TXD_AUX 29 Transmit data Debug Port Auxiliary UART Port 3.7.1. UART Port 3.7.1.1.
GSM/GPRS Module Series M66 Hardware Design Synchronization between DTE and DCE: When DCE (the module) powers on with the autobauding enabled, it is recommended to wait 2 to 3 seconds before sending the first AT character. 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.
GSM/GPRS Module Series M66 Hardware Design Figure 14: Reference Design for Full-Function UART Three-line connection is shown as below. Figure 15: Reference Design for UART Port UART Port with hardware flow control is shown as below. This connection will enhance the reliability of the mass data communication.
GSM/GPRS Module Series M66 Hardware Design Figure 16: Reference Design for UART Port with Hardware Flow Control 3.7.1.3. Firmware Upgrade The TXD, RXD can be used to upgrade firmware. The PWRKEY pin must be pulled down before firmware upgrade. The reference circuit is shown as below: Figure 17: Reference Design for Firmware Upgrade NOTE The firmware of module might need to be upgraded due to certain reasons. It is recommended to reserve these pins in the host board for firmware upgrade. 3.7.2.
GSM/GPRS Module Series M66 Hardware Design Figure 18: Reference Design for Debug Port 3.7.3. Auxiliary UART Port Two data lines: TXD_AUX and RXD_AUX. Auxiliary UART port is used for AT command only and does not support GPRS data, Multiplexing function etc. Auxiliary UART port supports the communication baud rates as the following: 1200, 2400, 4800, 9600, 14400, 19200, 28800, 38400, 57600, 115200. Auxiliary UART port could be used when you send AT+QEAUART=1 string on the UART port.
GSM/GPRS Module Series M66 Hardware Design Figure 20: Level Match Design for 3.3V System NOTE It is highly recommended to add the resistor divider circuit on the UART signal lines when the host’s level is 3V or 3.3V. For the higher voltage level system, a level shifter IC could be used between the host and the module. For more details about UART circuit design, please refer to document [13]. The following figure shows a sketch map between module and standard RS-232 interface.
GSM/GPRS Module Series M66 Hardware Design Figure 21: Sketch Map for RS-232 Interface Match Please visit vendor web site to select suitable IC, such as: http://www.maximintegrated.com and http://www.exar.com/. 3.8. Audio Interfaces The module provides one analog input channels and two analog output channels. Table 9: Pin Definition of Audio Interface Interface Pin Name Pin No.
GSM/GPRS Module Series M66 Hardware Design MICP 3 Microphone positive input MICN 4 Microphone negative input SPK2P 2 Channel 2 Audio positive output AGND 1 Form a pseudo-differential pair with SPK2P AIN/AOUT2 AIN can be used for input of microphone and line. An electret microphone is usually used. AIN are 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.
GSM/GPRS Module Series M66 Hardware Design Sometimes, even no RF filtering capacitor is required. The capacitor which is used for filtering out RF noise should be close to audio interface or other audio interfaces. 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 M66 Hardware Design 3.8.3.
GSM/GPRS Module Series M66 Hardware Design Figure 25: Handset Interface Design for AOUT2 Figure 26: Speaker Interface Design with an Amplifier for AOUT2 The suitable differential audio amplifier can be chosen from the Texas Instrument’s website (http://www.ti.com/). There are also other excellent audio amplifier vendors in the market. 1.NOTE The value of C1 and C2 here depends on the input impedance of audio amplifier.
GSM/GPRS Module Series M66 Hardware Design 3.8.4. Earphone Interface Design Figure 27: Earphone Interface Design 3.8.5. Audio Characteristics Table 10: 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 K Ohm Table 11: Typical Speaker Characteristics Parameter Min. Load resistance AOUT1 Output Typ. Max.
GSM/GPRS Module Series M66 Hardware Design Ref level AOUT2 Output 0 Load resistance 4.8 Load Resistance 32 Single-ended Reference level 0 Vpp 2.4 Vpp 3.9. PCM Interface M66 supports PCM interface. It is used for digital audio transmission between the module and the device. This interface is composed of PCM_CLK, PCM_SYNC, PCM_IN and PCM_OUT signal lines. Pulse-code modulation (PCM) is a converter that changes the consecutive analog audio signal to discrete digital signal.
GSM/GPRS Module Series M66 Hardware Design Table 13: Configuration PCM Line Interface Format Linear Data Length Linear: 16 bits Sample Rate 8KHz PCM Clock/Synchronization Source PCM master mode: clock and synchronization is generated by module PCM Synchronization Rate 8KHz PCM Clock Rate PCM master mode: 256 KHz (line) PCM Synchronization Format Long/short synchronization PCM Data Ordering MSB first Zero Padding NO Sign Extension NO 3.9.2.
GSM/GPRS Module Series M66 Hardware Design details, please refer to Chapter 3.9.4. Figure 28: Long Synchronization Diagram Figure 29: Short Synchronization Diagram 3.9.3. Reference Design M66 can only work as a master, providing synchronization and clock source. The reference design is shown as below.
GSM/GPRS Module Series M66 Hardware Design Figure 30: Reference Design for PCM 3.9.4. AT Command There are two AT commands about the configuration of PCM, listed as below. AT+QPCMON can configure operating mode of PCM.
GSM/GPRS Module Series M66 Hardware Design Table 15: QPCMVOL Command Description Parameter Scope Description vol_pcm_in 0~32767 Set the input volume vol_pcm_out 0~32767 Set the output volume The voice may be distorted when this value exceeds 16384. 3.10.
GSM/GPRS Module Series M66 Hardware Design SIM_GND Module 100nF SIM_VDD SIM_RST SIM_CLK SIM_Holder VCC RST CLK 22R 22R GND VPP IO 22R SIM_DATA 33pF 33pF 33pF 33pF TVS GND GND Figure 31: Reference Circuit for SIM Interface with the 6-pin SIM Card Holder For more information http://www.molex.com . of SIM card holder, you can visit http://www.amphenol.com and In order to enhance the reliability and availability of the SIM card in application.
GSM/GPRS Module Series M66 Hardware Design 3.11. SD Card Interface The module provides an SD card interface that supports many types of memory, such as Memory Stick, SD/MCC card and T-Flash or Micro SD card. The following are the main features of SD card interface.
GSM/GPRS Module Series M66 Hardware Design Figure 32: Reference Circuit for Micro SD Card Table 18: Pin Name of the SD Card and T-Flash (Micro SD) Card Pin No.
GSM/GPRS Module Series M66 Hardware Design SD_DATA, SD_CMD and SD_CLK to be less than 10mm. In order to offer good ESD protection, it is recommended to add TVS on signals with capacitance less than 15pF. Reserve external pull-up resistors for other data lines except the DATA0 signal. The SD_CLK and SD_DATA line must be shielded by ground in order to improve EMI suppression capability. 3.12. ADC The module provides an ADC channel to measure the value of voltage.
GSM/GPRS Module Series M66 Hardware Design 3.13. Behaviors of The RI Table 21: Behaviors of the RI State RI Response Standby HIGH Voicecall Change to LOW, then: 1. Change to HIGH when call is established. 2. Use ATH to hang up the call, RI changes to HIGH. 3. Calling part hangs up, RI changes to HIGH first, and changes to LOW for 120ms indicating “NO CARRIER” as an URC, then changes to HIGH again. 4. Change to HIGH when SMS is received.
GSM/GPRS Module Series M66 Hardware Design Figure 34: RI Behavior as a Caller Figure 35: RI Behavior of URC or SMS Received 3.14. 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 22: 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 M66 Hardware Design Figure 36: Reference Design for NETLIGHT 3.15. RF Transmitting Signal Indication The M66 provides a RFTXMON pins which will rise when the transmitter is active and fall after the transmitter activity is completed. Table 23: Pin Definition of the RFTXMON Pin Name Pin No.
GSM/GPRS Module Series M66 Hardware Design You can execute AT+QCFG=“RFTXburst”, 1 to enable the function. The timing of the RFTXMON signal is shown below. Figure 37: RFTXMON Signal during Burst Transmission 2) Active during the Call RFTXMON will be HIGH during a call and the pin will become LOW after being hanged up. You can execute AT+QCFG=“RFTXburst”, 2 to enable the function. The timing of the RFTXMON signal is shown below.
GSM/GPRS Module Series M66 Hardware Design Figure 38: RFTXMON Signal during Call M66_Hardware_Design Confidential / Released 62 / 82
GSM/GPRS Module Series M66 Hardware Design 4 Antenna Interface M66 has two antenna interfaces, GSM antenna and BT antenna. The Pin 26 is the Bluetooth antenna pad. The Pin 35 is the GSM antenna pad. The RF interface of the two antenna pad has an impedance of 50Ω. 4.1. GSM Antenna Interface There is a GSM antenna pad named RF_ANT for M66. Table 24: Pin Definition of the RF_ANT Pin Name Pin No. Description GND 34 Ground RF_ANT 35 GSM antenna pad GND 36 Ground GND 37 Ground 4.1.1.
GSM/GPRS Module Series M66 Hardware Design Figure 39: Reference Design for GSM Antenna M66 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. M66 comes with grounding pads which are next to the antenna pad in order to give a better grounding. Besides, a π type match circuit is suggested to be used to adjust the RF performance.
GSM/GPRS Module Series M66 Hardware Design EGSM900 33dBm±2dB 5dBm±5dB DCS1800 30dBm±2dB 0dBm±5dB PCS1900 30dBm±2dB 0dBm±5dB NOTE In GPRS 4 slots TX mode, the max output power is reduced by 2.5dB. This design conforms to the GSM specification as described in section 13.16 of 3GPP TS 51.010-1. 4.1.3. RF Receiving Sensitivity Table 28: The Module Conducted RF Receiving Sensitivity Frequency Receive Sensitivity GSM850 < -109dBm EGSM900 < -109dBm DCS1800 < -109dBm PCS1900 < -109dBm 4.1.4.
GSM/GPRS Module Series M66 Hardware Design 4.1.5. 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 40: RF Soldering Sample 4.2. Bluetooth Antenna Interface M66 supports Bluetooth interface. Bluetooth is a wireless technology that allows devices to communicate, or transmit data or voice, wirelessly over a short distance.
GSM/GPRS Module Series M66 Hardware Design The module provides a Bluetooth antenna pad named BT_ANT. Table 30: Pin Definition of the BT_ANT Pin Name Pin No.
GSM/GPRS Module Series M66 Hardware Design Keep the RF traces as 50Ω; The RF traces should be kept far away from the high frequency signals and strong disturbing source.
GSM/GPRS Module Series M66 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 31: Absolute Maximum Ratings Parameter Min. Max. Unit VBAT -0.3 +4.73 V Peak Current of Power Supply 0 2 A RMS Current of Power Supply (during one TDMA- frame) 0 0.7 A Voltage at Digital Pins -0.3 3.
GSM/GPRS Module Series M66 Hardware Design Table 32: Operating Temperature Parameter Min. Typ. Max. Unit Operation temperature range -35 +25 +75 ℃ Extended temperature range -40 +85 ℃ NOTES 1. 2. 1) Within operation temperature range, the module is 3GPP compliant. Within extended temperature range, the module remains the ability to establish and maintain a voice, SMS, data transmission, emergency call, etc.
GSM/GPRS Module Series M66 Hardware Design Peak supply current (during transmission slot) DATA mode, GPRS (3Rx, 2Tx) GSM850/EGSM9001) DCS1800/PCS19002) 363/393 268/257 mA mA DATA mode, GPRS (2 Rx, 3Tx) GSM850/EGSM9001) DCS1800/PCS19002) 506/546 366/349 mA mA DATA mode, GPRS (4 Rx, 1Tx) GSM850/EGSM9001) DCS1800/PCS19002) 217/234 172/170 mA mA DATA mode, GPRS (1Rx, 4Tx) GSM850/EGSM9001) DCS1800/PCS19002) 458/4853) 462/439 mA mA Maximum power control level on GSM850 and EGSM900. 1.
GSM/GPRS Module Series M66 Hardware Design EGSM900 @power level #5 <300mA, Typical 219mA @power level #12, Typical 83mA @power level #19, Typical 63mA DCS1800 @power level #0 <250mA, Typical 153mA @power level #7, Typical 73mA @power level #15, Typical 60mA PCS1900 @power level #0 <250mA, Typical 151mA @power level #7, Typical 76mA @power level #15, Typical 61mA GPRS Data DATA Mode, GPRS ( 3 Rx, 2Tx ) CLASS 12 GSM850 @power level #5 <550mA, Typical 363mA @power level #12, Typical 131mA @power level
GSM/GPRS Module Series M66 Hardware Design EGSM900 @power level #5 <350mA, Typical 233mA @power level #12, Typical 104mA @power level #19, Typical 84mA DCS1800 @power level #0 <300mA, Typical 171mA @power level #7, Typical 96mA @power level #15, Typical 82mA PCS1900 @power level #0 <300mA, Typical 169mA @power level #7, Typical 98mA @power level #15, Typical 83mA DATA Mode, GPRS ( 1 Rx, 4Tx ) CLASS 12 GSM850 @power level #5 <660mA, Typical 457mA @power level #12, Typical 182mA @power level #19, Typi
GSM/GPRS Module Series M66 Hardware Design Table 35: The ESD Endurance (Temperature: 25ºC, Humidity: 45%) Tested Point Contact Discharge Air Discharge VBAT, GND ±5KV ±10KV RF_ANT ±5KV ±10KV TXD, RXD ±2KV ±4KV Others ±0.
GSM/GPRS Module Series M66 Hardware Design 6 Mechanical Dimensions This chapter describes the mechanical dimensions of the module. 6.1.
GSM/GPRS Module Series M66 Hardware Design Figure 43: M66 Module Bottom Dimensions (Unit: mm) M66_Hardware_Design Confidential / Released 76 / 82
GSM/GPRS Module Series M66 Hardware Design 6.2. Recommended Footprint 36 1 23 14 Figure 44: Recommended Footprint (Unit: mm) NOTES 1. 2. The module should be kept about 3mm away from other components in the host PCB. The circular test points with a radius of 1.75mm in the above recommended footprint should be treated as keepout areas. (“keepout” means do not pour copper on the mother board).
GSM/GPRS Module Series M66 Hardware Design 6.3. Top View of the Module Figure 45: Top View of the Module 6.4.
GSM/GPRS Module Series M66 Hardware Design 7 Storage and Manufacturing 7.1. Storage MC66 module is stored in a vacuum-sealed bag. The storage restrictions are shown as below. 1. Shelf life in the vacuum-sealed bag: 12 months at <40ºC and <90%RH. 2. After the vacuum-sealed bag is opened, devices that need to be mounted directly must be: Mounted within 72 hours at the factory environment of ≤30ºC and <60% RH. Stored at <10% RH. 3.
GSM/GPRS Module Series M66 Hardware Design 7.2. Soldering Push the squeegee to apply the solder paste on the surface of stencil, thus making the paste fill the stencil openings and then penetrate to the PCB. The force on the squeegee should be adjusted properly 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 M66. For more details, please refer to document [12].
GSM/GPRS Module Series M66 Hardware Design 7.3. Packaging The modules are stored in 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 M66 Hardware Design Figure 49: Dimensions of Reel M66_Hardware_Design Confidential / Released 82 / 82
GSM/GPRS Module Series M66 Hardware Design 8 Appendix A References Table 36: Related Documents SN Document Name Remark [1] Quectel_M66_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 M66 Hardware Design [10] GSM_UART_Application_Note UART port application note [11] GSM_EVB_User_Guide GSM EVB user guide [12] Module_Secondary_SMT_User_Guide Module secondary SMT user guide [13] Quectel_GSM_Module_Digital_IO_Application_Note GSM Module Digital IO Application Note Table 37: Terms and Abbreviations Abbreviation Description ADC Analog-to-Digital Converter AMR Adaptive Multi-Rate ARP Antenna Reference Point ASIC Application Specific Integrated Circui
GSM/GPRS Module Series M66 Hardware Design DTX Discontinuous Transmission EFR Enhanced Full Rate EGSM Enhanced GSM EMC Electromagnetic Compatibility ESD Electrostatic Discharge ETS European Telecommunication Standard FCC Federal Communications Commission (U.S.) FDMA Frequency Division Multiple Access FR Full Rate GMSK Gaussian Minimum Shift Keying GPRS General Packet Radio Service GSM Global System for Mobile Communications G.
GSM/GPRS Module Series M66 Hardware Design MT Mobile Terminated N.
GSM/GPRS Module Series M66 Hardware Design VILmax Maximum Input Low Level Voltage Value VILmin Minimum Input Low Level Voltage Value VImax Absolute Maximum Input Voltage Value VInorm Absolute Normal Input Voltage Value VImin Absolute Minimum Input Voltage Value VOHmax Maximum Output High Level Voltage Value VOHmin Minimum Output High Level Voltage Value VOLmax Maximum Output Low Level Voltage Value VOLmin Minimum Output Low Level Voltage Value Phonebook Abbreviations LD SIM Last Dialing
GSM/GPRS Module Series M66 Hardware Design 9 Appendix B GPRS Coding Schemes Four coding schemes are used in GPRS protocol. The differences between them are shown in the following table. Table 38: Description of Different Coding Schemes USF Pre-coded USF Radio Block excl.USF and BCS BCS 1/2 3 3 181 CS-2 2/3 3 6 CS-3 3/4 3 CS-4 1 3 Scheme Code Rate CS-1 Tail Coded Bits Punctured Bits Data Rate Kb/s 40 4 456 0 9.05 268 16 4 588 132 13.4 6 312 16 4 676 220 15.
GSM/GPRS Module Series M66 Hardware Design Figure 50: Radio Block Structure of CS-1, CS-2 and CS-3 M66_Hardware_Design Confidential / Released 89 / 82
GSM/GPRS Module Series M66 Hardware Design Radio block structure of CS-4 is shown as the following figure.
GSM/GPRS Module Series M66 Hardware Design M66_Hardware_Design Confidential / Released 91 / 82
GSM/GPRS Module Series M66 Hardware Design 10 Appendix C GPRS Multi-slot Classes Twenty-nine classes of GPRS multi-slot modes are defined for MS in GPRS specification. Multi-slot classes are product dependent, 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.
GSM/GPRS Module Series M66 Hardware Design FCC Certification Requirements. According to the definition of mobile and fixed device is described in Part 2.1091(b), this device is a mobile device. And the following conditions must be met: 1. This Modular Approval is limited to OEM installation for mobile and fixed applications only.
GSM/GPRS Module Series M66 Hardware Design If the device is used for other equipment that separate approval is required for all other operating configurations, including portable configurations with respect to 2.1093 and different antenna configurations. For this device, OEM integrators must be provided with labeling instructions of finished products. Please refer to KDB784748 D01 v07, section 8.
GSM/GPRS Module Series M66 Hardware Design (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Changes or modifications not expressly approved by the manufacturer could void the user’s authority to operate the equipment. To ensure compliance with all non-transmitter functions the host manufacturer is responsible for ensuring compliance with the module(s) installed and fully operational.
