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User manual | Users Manual | 2.06 MiB | October 05 2016 | |||
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| 1 | Cover Letter(s) | October 05 2016 | ||||||
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| 1 | Cover Letter(s) | October 05 2016 | ||||||
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| 1 | Test Setup Photos | October 05 2016 |
| 1 | User manual | Users Manual | 2.06 MiB | October 05 2016 |
EC20 Hardware Design LTE Module Series Rev. EC20_Hardware_Design Date: 2015-10-23 www.quectel.com LTE Module EC20 Hardware Design Our aim is to provide customers with timely and comprehensive service. For any assistance, please contact our company headquarters:
Quectel Wireless Solutions Co., Ltd. Office 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 Or Email: Support@quectel.com 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. THE INFORMATION SUPPLIED HEREIN IS 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. 2015. All rights reserved. EC20_Hardware_Design Confidential / Released 1 / 83 LTE Module EC20 Hardware Design About the Document History Revision Date Author Description 1.0 2015-02-13 Mountain ZHOU/
Mike ZHANG Initial 1.1 2015-08-14 Mountain ZHOU 1.2 2015-10-23 Mountain ZHOU 1. Added UART interface pins 2. Added FOTA upgrade mode 3. Updated module dimension information 4. Updated functional diagram 5. Updated power supply reference circuit 6. Updated description of UART interface 7. Updated current consumption 8. Updated GNSS sensitivity 1. Updated internet protocol 2. Updated UART interface feature 3. Updated functional diagram 4. Updated turning on timing 5. Updated GNSS performance 6. Released USIM_PRESENCE function EC20_Hardware_Design Confidential / Released 2 / 83 LTE Module EC20 Hardware Design Contents 2.2.1. 2.2.2. 2.3. 2.4. 2.5. About the Document ................................................................................................................................... 2 Contents ....................................................................................................................................................... 3 Table Index ................................................................................................................................................... 5 Figure Index ................................................................................................................................................. 6 Introduction .......................................................................................................................................... 7 1 1.1. Safety Information...................................................................................................................... 8 2 Product Concept .................................................................................................................................. 9 2.1. General Description ................................................................................................................... 9 Directives and Standards ......................................................................................................... 10 2.2. FCC Statement ............................................................................................................... 10 FCC Radiation Exposure Statement .............................................................................. 10 Key Features ........................................................................................................................... 11 Functional Diagram ................................................................................................................. 13 Evaluation Board ..................................................................................................................... 14 3 Application Interface ......................................................................................................................... 15 3.1. General Description ................................................................................................................. 15 3.2. Pin Assignment ........................................................................................................................ 16 3.3. Pin Description ......................................................................................................................... 17 3.4. Operating Modes ..................................................................................................................... 22 3.5. Power Saving ........................................................................................................................... 23 3.5.1. Sleep Mode .................................................................................................................... 23 3.5.1.1. UART Application ................................................................................................. 23 3.5.1.2. USB Application with USB Remote Wakeup Function ........................................ 24 3.5.1.3. USB Application with USB Suspend/Resume and RI Function .......................... 25 3.5.1.4. USB Application without USB Suspend Function ................................................ 25 3.5.2. Airplane Mode ................................................................................................................ 26 Power Supply ........................................................................................................................... 27 3.6.1. Power Supply Pins ......................................................................................................... 27 3.6.2. Decrease Voltage Drop .................................................................................................. 27 3.6.3. Reference Design for Power Supply .............................................................................. 28 3.6.4. Monitor the Power Supply .............................................................................................. 29 Turn on and off Scenarios ....................................................................................................... 29 Turn on Module Using the PWRKEY ............................................................................. 29 Turn off Module .............................................................................................................. 31 Turn off Module Using the PWRKEY Pin ............................................................. 31 Turn off Module Using AT Command ................................................................... 32 Reset the Module..................................................................................................................... 32 3.8. 3.9. USIM Card Interface ................................................................................................................ 34 3.10. USB Interface .......................................................................................................................... 36 3.11. UART Interface ........................................................................................................................ 37 3.12. PCM and I2C Interface ............................................................................................................ 40 3.7.2.1. 3.7.2.2. 3.7.1. 3.7.2. 3.6. 3.7. EC20_Hardware_Design Confidential / Released 3 / 83 LTE Module EC20 Hardware Design 3.13. ADC Function .......................................................................................................................... 42 3.14. Network Status Indication ........................................................................................................ 43 3.15. Operating Status Indication ..................................................................................................... 44 3.16. Behavior of the RI .................................................................................................................... 45 4 GNSS Receiver ................................................................................................................................... 46 4.1. General Description ................................................................................................................. 46 4.2. GNSS Performance ................................................................................................................. 47 Layout Guideline ...................................................................................................................... 48 4.3. 5 Antenna Interface ............................................................................................................................... 49 5.1. Main/Rx-diversity Antenna Interface ........................................................................................ 49 5.1.1. Pin Definition .................................................................................................................. 49 5.1.2. Operating Frequency ..................................................................................................... 49 5.1.3. Reference Design .......................................................................................................... 50 5.2. GNSS Antenna Interface ......................................................................................................... 50 Antenna Installation ................................................................................................................. 51 5.3. 5.3.1. Antenna Requirement .................................................................................................... 51 5.3.2. Install the Antenna with RF Connector .......................................................................... 52 6 Electrical, Reliability and Radio Characteristics ............................................................................ 55 Absolute Maximum Ratings ..................................................................................................... 55 6.1. Power Supply Ratings ............................................................................................................. 56 6.2. 6.3. Operating Temperature ............................................................................................................ 56 Current Consumption .............................................................................................................. 57 6.4. 6.5. RF Output Power ..................................................................................................................... 58 RF Receiving Sensitivity .......................................................................................................... 58 6.6. 6.7. Electrostatic Discharge ............................................................................................................ 59 7 Mechanical Dimensions .................................................................................................................... 60 7.1. Mechanical Dimensions of the Module.................................................................................... 60 Footprint of Recommendation ................................................................................................. 62 7.2. Top View of the Module ........................................................................................................... 65 7.3. 7.4. Bottom View of the Module ...................................................................................................... 65 8 Storage and Manufacturing .............................................................................................................. 66 8.1. Storage..................................................................................................................................... 66 8.2. Manufacturing and Welding ..................................................................................................... 66 Packaging ................................................................................................................................ 68 8.3. 9 Appendix A Reference ....................................................................................................................... 69 10 Appendix B GPRS Coding Scheme ................................................................................................. 73 11 Appendix C GPRS Multi-slot Class .................................................................................................. 74 12 Appendix D EDGE Modulation and Coding Scheme ..................................................................... 75 EC20_Hardware_Design Confidential / Released 4 / 83 LTE Module EC20 Hardware Design Table Index TABLE 1: EC20 FREQUENCY BANDS .............................................................................................................. 9 TABLE 2: EC20 KEY FEATURES ...................................................................................................................... 11 TABLE 3: IO PARAMETERS DEFINITION ........................................................................................................ 17 TABLE 4: PIN DESCRIPTION ........................................................................................................................... 17 TABLE 5: OVERVIEW OF OPERATING MODES ............................................................................................. 22 TABLE 6: VBAT AND GND PINS ....................................................................................................................... 27 TABLE 7: PWRKEY PIN DESCRIPTION .......................................................................................................... 29 TABLE 8: RESET_N PIN DESCRIPTION ......................................................................................................... 32 TABLE 9: PIN DEFINITION OF THE USIM INTERFACE ................................................................................. 34 TABLE 10: USB PIN DESCRIPTION ................................................................................................................ 36 TABLE 11: PIN DEFINITION OF THE UART INTERFACE ............................................................................... 37 TABLE 12: PIN DEFINITION OF THE DEBUG UART INTERFACE ................................................................. 38 TABLE 13: LOGIC LEVELS OF DIGITAL I/O .................................................................................................... 38 TABLE 14: PIN DEFINITION OF PCM AND I2C INTERFACE .......................................................................... 41 TABLE 15: PIN DEFINITION OF THE ADC ...................................................................................................... 42 TABLE 16: CHARACTERISTIC OF THE ADC .................................................................................................. 43 TABLE 17: PIN DEFINITION OF NETWORK INDICATOR ............................................................................... 43 TABLE 18: WORKING STATE OF THE NETWORK INDICATOR..................................................................... 43 TABLE 19: PIN DEFINITION OF STATUS ........................................................................................................ 44 TABLE 20: BEHAVIOR OF THE RI ................................................................................................................... 45 TABLE 21: GNSS PERFORMANCE ................................................................................................................. 47 TABLE 22: PIN DEFINITION OF THE RF ANTENNA ....................................................................................... 49 TABLE 23: THE MODULE OPERATING FREQUENCIES ................................................................................ 49 TABLE 24: PIN DEFINITION OF GNSS ANTENNA .......................................................................................... 50 TABLE 25: GNSS FREQUENCY ....................................................................................................................... 51 TABLE 26: ANTENNA REQUIREMENTS .......................................................................................................... 51 TABLE 27: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 55 TABLE 28: THE MODULE POWER SUPPLY RATINGS .................................................................................. 56 TABLE 29: OPERATING TEMPERATURE ........................................................................................................ 56 TABLE 30: EC20 CURRENT CONSUMPTION ................................................................................................. 57 TABLE 34: CONDUCTED RF OUTPUT POWER ................................................................... !
TABLE 35: EC20 CONDUCTED RF RECEIVING SENSITIVITY ...................................................................... 59 TABLE 39: ELECTROSTATICS DISCHARGE CHARACTERISTICS ............................................................... 59 TABLE 40: RELATED DOCUMENTS ................................................................................................................ 69 TABLE 41: TERMS AND ABBREVIATIONS ...................................................................................................... 69 TABLE 42: DESCRIPTION OF DIFFERENT CODING SCHEMES .................................................................. 73 TABLE 43: GPRS MULTI-SLOT CLASSES ...................................................................................................... 74 TABLE 44: EDGE MODULATION AND CODING SCHEME ............................................................................. 75 EC20_Hardware_Design Confidential / Released 5 / 83 LTE Module EC20 Hardware Design Figure Index FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 14 FIGURE 2: PIN ASSIGNMENT (TOP VIEW)..................................................................................................... 16 FIGURE 3: UART SLEEP APPLICATION ......................................................................................................... 23 FIGURE 4: SLEEP APPLICATION WITH USB REMOTE WAKEUP ................................................................ 24 FIGURE 5: SLEEP APPLICATION WITH RI ..................................................................................................... 25 FIGURE 6: SLEEP APPLICATION WITHOUT SUSPEND FUNCTION ............................................................ 26 FIGURE 7: POWER SUPPLY LIMITS DURING TRANSMIT BURST ............................................................... 28 FIGURE 8: STAR STRUCTURE OF THE POWER SUPPLY............................................................................ 28 FIGURE 9: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 29 FIGURE 10: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................. 30 FIGURE 11: TURN ON THE MODULE USING KEYSTROKE .......................................................................... 30 FIGURE 12: TIMING OF TURNING ON MODULE ........................................................................................... 31 FIGURE 13: TIMING OF TURNING OFF MODULE ......................................................................................... 32 FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ...................................... 33 FIGURE 15: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ...................................................... 33 FIGURE 16: TIMING OF RESETTING MODULE ............................................................................................. 33 FIGURE 17: REFERENCE CIRCUIT OF 8-PIN USIM CONNECTOR .............................................................. 34 FIGURE 18: REFERENCE CIRCUIT OF 6-PIN USIM CONNECTOR .............................................................. 35 FIGURE 19: TEST POINTS FOR FIRMWARE UPGRADE .............................................................................. 36 FIGURE 20: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 39 FIGURE 21: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 39 FIGURE 22: PRIMARY MODE TIMING ............................................................................................................ 40 FIGURE 23: AUXILIARY MODE TIMING .......................................................................................................... 41 FIGURE 24: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 42 FIGURE 25: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .......................................................... 44 FIGURE 26: REFERENCE CIRCUIT OF THE STATUS ................................................................................... 44 FIGURE 27: REFERENCE CIRCUIT OF ANTENNA INTERFACE ................................................................... 50 FIGURE 28: REFERENCE CIRCUIT OF GNSS ANTENNA ............................................................................. 51 FIGURE 29: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ................................................ 53 FIGURE 30: MECHANICALS OF UF.L-LP CONNECTORS ............................................................................. 53 FIGURE 31: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 54 FIGURE 32: MODULE TOP AND SIDE DIMENSIONS ..................................................................................... 60 FIGURE 33: MODULE BOTTOM DIMENSIONS (BOTTOM VIEW) ................................................................. 61 FIGURE 34: BOTTOM PADS DIMENSIONS (BOTTOM VIEW) ....................................................................... 61 FIGURE 35: RECOMMENDED FOOTPRINT (TOP VIEW) .............................................................................. 62 FIGURE 36: RECOMMENDED STENCIL ......................................................................................................... 63 FIGURE 37: RECOMMENDED FOOTPRINT WITH PINS 117~140 ................................................................ 64 FIGURE 38: TOP VIEW OF THE MODULE ...................................................................................................... 65 FIGURE 39: BOTTOM VIEW OF THE MODULE .............................................................................................. 65 FIGURE 40: LIQUIDS TEMPERATURE ............................................................................................................ 67 FIGURE 41: CARRIER TAPE ............................................................................................................................ 68 EC20_Hardware_Design Confidential / Released 6 / 83 LTE Module EC20 Hardware Design 1 Introduction This document defines the EC20 module and describes its air interface and hardware interface which are connected with your application. This document can help you quickly understand module interface specifications, electrical, mechanical details and related product information of EC20 module. Associated with application notes and user guide, you can use EC20 module to design and set up mobile applications easily. EC20_Hardware_Design Confidential / Released 7 / 83 LTE Module EC20 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 EC20 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 customer 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 mobile while driving (even with a handsfree kit) cause distraction and can lead to an accident. You must comply with laws and regulations restricting 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 Airplane 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. 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. EC20_Hardware_Design Confidential / Released 8 / 83 LTE Module EC20 Hardware Design 2 Product Concept 2.1. General Description EC20 is a series of LTE-FDD/WCDMA/GSM wireless communication module with receive diversity, which provides data connectivity on FDD-LTE, DC-HSPA+, HSPA+, HSDPA, HSUPA, WCDMA, EDGE and GPRS networks. It can also provide GPS/GLONASS1) and voice functionality for your specific application. Table 1: EC20 Frequency Bands FDD-LTE
(with Rx-diversity) TDD-LTE
(with Rx-diversity) WCDMA
(with Rx-diversity) TD-SCDMA
(with Rx-diversity) CDMA
(with Rx-diversity) GSM GNSS NOTES EC20 B2/B4/B5/B12/B17 Not supported B2/B4/B5 Not supported Not supported 850/1900 GPS+GLONASS 1. 1) GPS and GLONASS function is optional. With a tiny profile of 32.0mm 29.0mm 2.4mm, EC20 can meet almost all requirements for M2M application such as automotive, metering, tracking system, security solutions, routers, wireless POS, mobile computing devices, PDA phone and tablet PC, etc.. EC20 is an SMD type module, which can be embedded in application through its 140-pin pads including EC20_Hardware_Design Confidential / Released 9 / 83 LTE Module EC20 Hardware Design 76 LCC signal pads and 64 other pads. 2.2. Directives and Standards The EC20 module is designed to comply with the FCC statements. FCC ID: XMR201603EC20 The Host system using EC20 should have label contains modulars FCC ID: XMR201603EC20. 2.2.1. FCC Statement Changes or modifications not expressly approved by the party responsible for compliance could void the users 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 EC20, must include RF exposure warning statement to advice user should keep minimum 20cm from the radio antenna of EC20 module depending on the Mobile status. Note: If a portable device (such as PDA) uses EC20 module, the device needs to do permissive change and SAR testing. The following list indicates the performance of antenna gain in certificate testing. Frequency Range (MHz) Peak Gain Average VS Impedanc
(XZ-V) Gain(XZ-V) WR e GSM850:824894MHz PCS1900: 18501990MHz UMTS B2: 18501990MHz UMTS B4: 17102155MHz UMTS B5: 824894MHz 1 dBi typ. FDD B2: 18501990MHz FDD B4: 17102155MHz FDD B5: 824894MHz FDD B12: 699746MHz FDD B17: 704746MHz 1 dBi typ. 2 max 50 Part Number 3R007 EC20_Hardware_Design Confidential / Released 10 / 83 LTE Module EC20 Hardware Design 2.3. Key Features The following table describes the detailed features of EC20 module. Table 2: EC20 Key Features Feature Details Power Supply Supply voltage: 3.3V~4.3V Typical supply voltage: 3.8V Class 4 (33dBm2dB) for GSM850 Class E2 (27dBm3dB) for GSM850 8-PSK Transmitting Power Class E2 (26dBm3dB) for PCS1900 8-PSK LTE Features WCDMA Features Class 3 (24dBm+1/-3dB) for WCDMA bands Class 3 (23dBm2dB) for LTE FDD bands Support 3GPP R9 CAT3 FDD Support 1.4 to 20MHz RF bandwidth Support 2 2 MIMO in DL direction FDD: Max 100Mbps (DL), 50Mbps (UL) Support 3GPP R8 DC-HSPA+
Support 16-QAM, 64-QAM and QPSK modulation 3GPP R6 HSUPA: Max 5.76Mbps (UL) 3GPP R8 DC-HSPA+: Max 42Mbps (DL) R99: CSD: 9.6kbps, 14.4kbps GPRS:
Support GPRS multi-slot class 12 (12 by default) Coding scheme: CS-1, CS-2, CS-3 and CS-4 Maximum of four Rx time slots per frame GSM Features EDGE:
Support EDGE multi-slot class 12 (12 by default) Support GMSK and 8-PSK for different MCS (Modulation and Coding scheme) Downlink coding schemes: CS 1-4 and MCS 1-9 Uplink coding schemes: CS 1-4 and MCS 1-9 Internet Protocol Features Support TCP/UDP/PPP/FTP/HTTP/SMTP/MMS/NTP/PING/QMI protocols Support the protocols PAP (Password Authentication Protocol) and CHAP
(Challenge Handshake Authentication Protocol) usually used for PPP SMS connections Text and PDU mode Point to point MO and MT SMS cell broadcast SMS storage: ME by default EC20_Hardware_Design Confidential / Released 11 / 83 LTE Module EC20 Hardware Design USIM Interface Support USIM/SIM card: 1.8V, 3.0V Support one digital audio interface: PCM interface GSM: HR/FR/EFR/AMR/AMR-WB Audio Features 1) WCDMA: AMR/AMR-WB LTE: AMR/AMR-WB PCM Interface 1) USB Interface UART Interface Support echo cancellation and noise suppression Used for audio function with external codec Support 8-bit A-law 2), -law 2) and 16-bit linear data formats Support long frame sync and short frame sync Support master and slave mode, but must be the master in long frame sync Compliant with USB 2.0 specification (slave only), the data transfer rate can reach up to 480Mbps Used for AT command communication, data transmission, GNSS NMEA output, software debug and firmware upgrade USB Driver: Windows XP, Windows Vista, Windows 7, Windows 8/8.1, Window CE 5.0/6.0/7.0, Linux 2.6 or later, Android 2.3/4.0/4.2/4.4/5.0 Main UART:
Used for AT command and data transmission Baud rate reach up to 921600bps, 115200bps by default Support RTS and CTS hardware flow control Support multiplexing function Debug UART:
Used for Linux console, log and GNSS NMEA output 115200bps baud rate Rx-diversity Support LTE/WCDMA/TD-SCDMA/CDMA Rx-diversity GNSS Features AT Commands Network Indication Antenna Interface Physical Characteristics Temperature Range gpsOne Gen8A of Qualcomm (GPS and GLONASS) Protocol: NMEA 0183 Compliant with 3GPP TS 27.007, 27.005 and Quectel enhanced AT commands Two pins including NET_MODE and NET_STATUS to indicate network connectivity status Including main antenna (ANT_MAIN), Rx-diversity antenna (ANT_DIV) and GNSS antenna (ANT_GNSS) Size: 32.00.15 29.00.15 2.40.2mm Weight: approx. 4.9g Normal operation: -35C ~ +75C Restricted operation: -40C ~ -35C and +75C ~ +85C 3) Storage temperature: -45C ~ +90C Firmware Upgrade USB interface and DFOTA RoHS All hardware components are fully compliant with EU RoHS directive EC20_Hardware_Design Confidential / Released 12 / 83 LTE Module EC20 Hardware Design NOTES 1) Audio (PCM) function is only supported on Telematics version. 2) This function is under development. 3) When the module works within this restricted temperature range, RF performance might degrade. For example, the frequency error or the phase error would increase. 1. 2. 3. 2.4. Functional Diagram The following figure shows a block diagram of EC20 and illustrates the major functional parts. Power management Baseband DDR+NAND flash Radio frequency Peripheral interface EC20_Hardware_Design Confidential / Released 13 / 83 BasebandPMICTransceiver2G NAND1G SDRAMPASwitchLNASwitchANT_MAINANT_DIVANT_GNSSVBAT_BBVBAT_RFAPTPWRKEYADCsVDD_EXTUSBUSIMPCMUARTI2CRESET_N19.2MXOSTATUSGPIOsSAWSAWControlIQControlDuplexSAWTxPRxDRx LTE Module EC20 Hardware Design Figure 1: Functional Diagram 2.5. Evaluation Board In order to help you to develop applications with EC20, Quectel supplies an evaluation board (EVB), USB data cable, earphone, antenna and other peripherals to control or test the module. EC20_Hardware_Design Confidential / Released 14 / 83 LTE Module EC20 Hardware Design 3 Application Interface 3.1. General Description EC20 is equipped with a 76-pin 1.3mm pitch SMT pads plus 64-pin ground pads and reserved pads that connect to cellular application platform. Sub-interfaces included in these pads are described in detail in the following chapters:
Power supply USIM interface USB interface UART interface PCM interface ADC interface Status indication EC20_Hardware_Design Confidential / Released 15 / 83 LTE Module EC20 Hardware Design 3.2. Pin Assignment The following figure shows the pin assignment of the EC20 module. Figure 2: Pin Assignment (Top View) NOTES 1. Keep all RESERVED pins and unused pins unconnected. 2. GND pads 85~112 should be connected to ground in the design, and RESERVED pads 73~84 should not be designed in schematic and PCB decal. means these interface functions are only supported on Telematics version. 3. EC20_Hardware_Design Confidential / Released 16 / 83 35362021222324252627282930313233341345672WAKEUP_INAP_READYRESERVEDW_DISABLE#NET_MODENET_STATUSVDD_EXTGNDGNDDBG_RXDDBG_TXDUSIM_PRESENCEUSIM_VDDUSIM_DATAUSIM_CLKUSIM_RSTRESERVED8910111213141516171819545352515049484746454443424140393837727170696867666564636261605958575655USIM_GNDGNDRESET_NPWRKEYGNDRESERVEDPCM_INPCM_OUTPCM_SYNCPCM_CLKRESERVEDRESERVEDRESERVEDRESERVEDRESERVEDRESERVEDANT_DIVGNDGNDUSB_VBUSUSB_DMUSB_DPRXDTXDDTRRTSCTSDCDRISTATUSVBAT_BBVBAT_BBVBAT_RFVBAT_RFGNDRESERVEDGNDGNDANT_MAINGNDANT_GNSSGNDADC1RESERVEDI2C_SDAI2C_SCLRESERVEDADC0GNDGNDGND737475767778798081828384100101102106107111112103104109105110899498889397869196859095998792108113RESERVEDRESERVED117126125124123122121120119118127128115RESERVEDRESERVED116139140138137136135134133132131130129114RESERVEDPower PinsRESERVEDRESERVEDRESERVEDSignal PinsRESERVED PinsGND Pins LTE Module EC20 Hardware Design 3.3. Pin Description The following tables show the EC20s pin definition. Table 3: IO Parameters Definition Type Description IO DI DO PI PO AI AO OD Bidirectional input/output Digital input Digital output Power input Power output Analog input Analog output Open drain Table 4: Pin Description Power Supply Pin Name Pin No. I/O Description DC Characteristics Comment VBAT_BB 59, 60 PI module baseband Vmin=3.3V provide sufficient Power supply for Vmax=4.3V It must be able to part. Vnorm=3.8V current up to 0.8A. VBAT_RF 57, 58 PI Power supply for module RF part. Vmax=4.3V Vmin=3.3V It must be able to provide sufficient current in a transmitting Vnorm=3.8V burst which typically VDD_EXT 7 PO Provide 1.8V for Vnorm=1.8V external circuit. IOmax=50mA rises to 1.8A. Power supply for external GPIOs pull up circuits. 8, 9, 19, GND 22, 36, 46, Ground. 48, 50~54, EC20_Hardware_Design Confidential / Released 17 / 83 LTE Module EC20 Hardware Design 56, 72, 85~112 Turn On/Off Pin Name Pin No. I/O Description DC Characteristics Comment PWRKEY 21 DI Turn on/off the module. RESET_N 20 DI Reset the module. VIHmax=2.1V VIHmin=1.3V VILmax=0.5V VIHmax=2.1V VIHmin=1.3V VILmax=0.5V Pull-up to 1.8V internally. Pull-up to 1.8V internally. Active low. Status Indication Pin Name Pin No. I/O Description DC Characteristics Comment STATUS 61 OD Indicate the module operating status. Indicate the module NET_MODE 5 DO network registration NET_ STATUS mode. Indicate the module 6 DO network activity status. USB Interface The drive current Require external should be less than pull-up. If unused, 0.9mA. keep it open. VOHmin=1.35V VOLmax=0.45V VOHmin=1.35V VOLmax=0.45V 1.8V power domain. If unused, keep it open. 1.8V power domain. If unused, keep it open. Pin Name Pin No. I/O Description DC Characteristics Comment USB_VBUS 71 PI USB detection. Vmin=3.0V Vmax=5.25V USB differential data bus. USB differential data bus. Vnorm=5.0V Compliant with USB 2.0 standard specification. Compliant with USB 2.0 standard specification. Require differential impedance of 90ohm. Require differential impedance of 90ohm. USB_DP 69 IO USB_DM 70 IO USIM Interface Pin Name Pin No. I/O Description DC Characteristics Comment USIM_GND 10 Specified ground for USIM card. USIM_VDD 14 PO Power supply for For 1.8V USIM:
Either 1.8V or 3V is EC20_Hardware_Design Confidential / Released 18 / 83 LTE Module EC20 Hardware Design USIM card. USIM_DATA 15 IO Data signal of USIM card. USIM_CLK 16 DO Clock signal of USIM card. USIM_RST 17 DO Reset signal of USIM card. USIM_PRE SENCE 13 DI USIM card insertion detection. UART Interface Vmax=1.9V Vmin=1.7V For 3.0V USIM:
Vmax=3.05V Vmin=2.7V IOmax=50mA For 1.8V USIM:
VILmax=0.6V VIHmin=1.2V VOLmax=0.45V VOHmin=1.35V For 3.0V USIM:
VILmax=1.0V VIHmin=1.95V VOLmax=0.45V VOHmin=2.55V For 1.8V USIM:
VOLmax=0.45V VOHmin=1.35V For 3.0V USIM:
VOLmax=0.45V VOHmin=2.55V For 1.8V USIM:
VOLmax=0.45V VOHmin=1.35V For 3.0V USIM:
VOLmax=0.45V VOHmin=2.55V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V supported by the module automatically. 1.8V power domain. If unused, keep it open. Pin Name Pin No. I/O Description DC Characteristics Comment RI 62 DO Ring indicator VOLmax=0.45V VOHmin=1.35V 1.8V power domain. If unused, keep it open. EC20_Hardware_Design Confidential / Released 19 / 83 LTE Module EC20 Hardware Design DCD 63 DO Data carrier detection. VOLmax=0.45V VOHmin=1.35V CTS 64 DO Clear to send. RTS 65 DI Request to send. DTR 66 DI Data terminal ready, sleep mode control. TXD 67 DO Transmit data. RXD 68 DI Receive data. Debug UART Interface VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. 1.8V power domain. If unused, keep it open. 1.8V power domain. If unused, keep it open. 1.8V power domain. Pull-up by default. Low level wakes up the module. If unused, keep it open. 1.8V power domain. If unused, keep it open. 1.8V power domain. If unused, keep it open. Pin Name Pin No. I/O Description DC Characteristics Comment DBG_TXD 12 DO Transmit data. DBG_RXD 11 DI Receive data. ADC Interface VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. 1.8V power domain. If unused, keep it open. Pin Name Pin No. I/O Description DC Characteristics Comment ADC0 45 AI analog to digital General purpose converter. General purpose ADC1 44 AI analog to digital converter. Voltage range:
If unused, keep it 0.3V to VBAT_BB open. Voltage range:
If unused, keep it 0.3V to VBAT_BB open. EC20_Hardware_Design Confidential / Released 20 / 83 LTE Module EC20 Hardware Design PCM Interface Pin Name Pin No. I/O Description DC Characteristics Comment PCM_IN 24 DI PCM data input. PCM_OUT 25 DO PCM data output. PCM_SYNC 26 IO PCM data frame sync signal. PCM_CLK 27 IO PCM clock. VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V VOLmax=0.45V VOHmin=1.35V VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V VOLmax=0.45V VOHmin=1.35V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. If unused, keep it open. 1.8V power domain. If unused, keep it open. 1.8V power domain. In master mode, it is an output signal. In slave mode, it is an input signal. If unused, keep it open. 1.8V power domain. In master mode, its an output signal. In slave mode, it is an input signal. If unused, keep it open. I2C Interface Pin Name Pin No. I/O Description DC Characteristics Comment I2C_SCL 41 OD I2C serial clock. I2C_SDA 42 OD I2C serial data. RF Interface External pull-up resistor is required. 1.8V only. If unused, keep it open. External pull-up resistor is required. 1.8V only. If unused, keep it open. Pin Name Pin No. I/O Description DC Characteristics Comment ANT_DIV 35 AI Diversity antenna. 50ohm impedance. If unused, keep it open. ANT_MAIN 49 IO Main antenna. 50ohm impedance. ANT_GNSS 47 AI GNSS antenna. 50ohm impedance. If unused, keep it open. EC20_Hardware_Design Confidential / Released 21 / 83 LTE Module EC20 Hardware Design GPIO Pins Pin Name Pin No. I/O Description DC Characteristics Comment WAKEUP_IN 1 DI Sleep mode control. W_DISABLE# 4 DI Airplane mode control. AP_READY 2 DI processor sleep state detection. Application RESERVED Pins VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V VILmin=-0.3V VILmax=0.6V VIHmin=1.2V VIHmax=2.0V 1.8V power domain. Pull-up by default. Low level wakes up the module. If unused, keep it open. 1.8V power domain. Pull-up by default. In low voltage level, module can enter into airplane mode. If unused, keep it open. 1.8V power domain. If unused, keep it open. Pin Name Pin No. I/O Description DC Characteristics Comment 3, 18, 23, 28~34, RESERVED 37~40, 43, Reserved. 55, 73~84, 113~140 3.4. Operating Modes Keep these pins unconnected. The table below briefly summarizes the various operating modes referred in the following chapters. Table 5: Overview of Operating Modes Mode Details Normal Operation Idle Talk/Data Software is active. The module has registered to the network, and the module is ready to send and receive data. Network connection is ongoing. In this mode, the power consumption is decided by network setting and data transfer rate. Minimum AT+CFUN command can set the module entering into a minimum functionality mode EC20_Hardware_Design Confidential / Released 22 / 83 LTE Module EC20 Hardware Design Functionality without removing the power supply. In this case, both RF function and USIM card will be Mode Airplane Mode invalid. AT+CFUN command and W_DISABLE# pin can set the module entering into airplane mode. In this case, RF function will be invalid. In this mode, the current consumption of the module will be reduced to the minimal level. Sleep Mode During this mode, the module can still receive paging message, SMS, voice call and TCP/UDP data from the network normally. In this mode, the power management unit shuts down the power supply. Software is not active. The serial interface is not accessible. Operating voltage (connected to VBAT_RF and VBAT_BB) remains applied. Power Down Mode 3.5. Power Saving 3.5.1. Sleep Mode EC20 is able to reduce its current consumption to a minimum value during the sleep mode. The following section describes EC20s power saving procedure. 3.5.1.1. UART Application If host communicates with module via UART interface, the following preconditions can let the module enter into the sleep mode. Execute AT command AT+QSCLK=1 to enable the sleep mode. Drive DTR to high level. The following figure shows the connection between the module and host. Figure 3: UART Sleep Application EC20_Hardware_Design Confidential / Released 23 / 83 RXDTXDRIDTRAP_READYTXDRXDEINTGPIOGPIOModuleHostGNDGND LTE Module EC20 Hardware Design Driving host DTR to low level will wake up the module. When EC20 has URC to report, RI signal will wake up the host. Refer to Chapter 3.16 for details about RI behavior. AP_READY will detect the sleep state of host (can be configured to high level or low level detection). Refer to AT command AT+QCFG=apready for details. 3.5.1.2. USB Application with USB Remote Wakeup Function If host supports USB suspend/resume and remote wakeup function, the following part will show the sleep application. There are three preconditions to let the module enter into the sleep mode. Execute AT command AT+QSCLK=1 to enable the sleep mode. Ensure the DTR is held in high level or keep it open. The hosts USB bus which is connected with the module USB interface enters into suspended state. The following figure shows the connection between the module and host. Figure 4: Sleep Application with USB Remote Wakeup Sending data to EC20 through USB will wake up the module. When EC20 has URC to report, module will send remote wake-up signals on USB BUS to wake up the host. EC20_Hardware_Design Confidential / Released 24 / 83 USB_VBUSUSB_DPUSB_DMAP_READYVDDUSB_DPUSB_DMGPIOModuleHostGNDGND LTE Module EC20 Hardware Design 3.5.1.3. USB Application with USB Suspend/Resume and RI Function If host supports USB suspend/resume, but does not support remote wake-up function, the RI signal is needed to wake up the host. The following part will show the sleep application. There are three preconditions to let the module enter into the sleep mode. Execute AT command AT+QSCLK=1 to enable the sleep mode. Ensure the DTR is held in high level or keep it open. The hosts USB bus which is connected with the module USB interface enters into suspended state. The following figure shows the connection between the module and host. Figure 5: Sleep Application with RI Sending data to EC20 through USB will wake up the module. When EC20 has URC to report, RI signal will wake up the host. 3.5.1.4. USB Application without USB Suspend Function If host does not support USB suspend function, you should disconnect USB_VBUS with additional control circuit to let the module enter into sleep mode. Execute AT command AT+QSCLK=1 to enable the sleep mode. Ensure the DTR is held in high level or keep it open. Disconnect USB_VBUS. EC20_Hardware_Design Confidential / Released 25 / 83 USB_VBUSUSB_DPUSB_DMAP_READYVDDUSB_DPUSB_DMGPIOModuleHostGNDGNDRIEINT LTE Module EC20 Hardware Design The following figure shows the connection between the module and host. Figure 6: Sleep Application without Suspend Function Opening power switch to supply power to USB_VBUS will wake up the module. NOTE You should pay attention to the level match shown in dotted line between module and host. Refer to document [1] for more details about EC20 power management application. 3.5.2. Airplane Mode When module enters into the airplane mode, the RF function does not work, and all AT commands correlative with RF function will not be accessible. This mode can be set with the following ways. Hardware:
The W_DISABLE# pin is pulled up by default, driving it to low level will let the module enter into airplane mode. Software:
Command AT+CFUN provides the choice of the functionality level <fun>=0, 1, 4. AT+CFUN=0: Minimum functionality mode, both USIM and RF function are disabled. AT+CFUN=1: Full functionality mode (by default). AT+CFUN=4: Airplane mode. RF function is disabled. EC20_Hardware_Design Confidential / Released 26 / 83 USB_VBUSUSB_DPUSB_DMAP_READYVDDUSB_DPUSB_DMGPIOModuleHostRIEINTPower SwitchGPIOGNDGND LTE Module EC20 Hardware Design NOTES 1. The W_DISABLE# control function is disabled in firmware by default. It can be enabled by AT command AT+QCFG=airplanecontrol. Refer to document [2]. 2. The execution of AT+CFUN command will not affect GNSS function. 3.6. Power Supply 3.6.1. Power Supply Pins EC20 provides four VBAT pins dedicated to connect with the external power supply. There are two separate voltage domains for VBAT. VBAT_RF with two pins for module RF part. VBAT_BB with two pins for module baseband part. The following table shows the VBAT pins and ground pins. Table 6: VBAT and GND Pins Pin Name Pin No. Description Min. Typ. Max. Unit VBAT_RF 57, 58 VBAT_BB 59, 60 Power supply for module RF part. Power supply for module baseband part. 3.3 3.8 4.3 3.3 3.8 4.3 8, 9, 19, 22, 36, GND 46, 48, 50~54, Ground.
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0
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V V V 56, 72, 85~112 3.6.2. Decrease Voltage Drop The power supply range of the module is 3.3V ~ 4.3V. Make sure the input voltage will never drop below 3.3V. The following figure shows the voltage drop during transmitting burst in 2G network, the voltage drop will be less in 3G and 4G network. EC20_Hardware_Design Confidential / Released 27 / 83 LTE Module EC20 Hardware Design Figure 7: Power Supply Limits during Transmit Burst To decrease voltage drop, a bypass capacitor of about 100F with low ESR should be used. Multi-layer ceramic chip (MLCC) capacitor can provide the best combination of low ESR. The main power supply from an external application has to be a single voltage source and expanded to two sub paths with star structure. The width of VBAT_BB trace should be no less than 1mm, and the width of VBAT_RF trace should be no less than 2mm, and the principle of the VBAT trace is the longer, the wider. Three ceramic capacitors (100nF, 33pF, 10pF) are recommended to be applied to the VBAT pins. The capacitors should be placed close to the VBAT pins. In addition, in order to get a stable power source, it is suggested that you should use a zener diode of which reverse zener voltage is 5.1V and dissipation power is more than 0.5W. The following figure shows star structure of the power supply. Figure 8: Star Structure of the Power Supply 3.6.3. 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 that you should EC20_Hardware_Design Confidential / Released 28 / 83 VBATTransmit burstTransmit burstMin.3.3VRippleDropModuleVBAT_RFVBAT_BBVBATC1100uFC6100nFC733pFC810pF++C2100nFC5100uFC333pFC410pFD15.1V LTE Module EC20 Hardware Design use a LDO to supply power for module. If there is a big voltage difference between the input source and the desired output (VBAT), a buck converter is preferred to be used as a power supply. The following figure shows a reference design for +5V input power source. The designed output for the power supply is about 3.8V and the maximum load current is 3A. Figure 9: Reference Circuit of Power Supply 3.6.4. Monitor the Power Supply You can use the AT+CBC command to monitor the VBAT_BB voltage value. For more details, please refer to document [2]. 3.7. Turn on and off Scenarios 3.7.1. Turn on Module Using the PWRKEY The following table shows the pin definition of PWRKEY. Table 7: PWRKEY Pin Description Pin Name Pin No. Description DC Characteristics Comment PWRKEY 21 Turn on/off the module. VIHmax=2.1V VIHmin=1.3V VILmax=0.5V Pull-up to 1.8V internally. EC20_Hardware_Design Confidential / Released 29 / 83 DC_INMIC29302WUINOUTENGNDADJ24135VBAT 100nF470uF100nF100K47K470uF470R51K1%1%4.7K47KVBAT_EN LTE Module EC20 Hardware Design When EC20 is in power down mode, it can be turned on to normal mode by driving the PWRKEY pin to a low level for at least 100ms. It is recommended to use an open drain/collector driver to control the PWRKEY. After STATUS pin (require external pull-up) outputting a low level, PWRKEY pin can be released. A simple reference circuit is illustrated in the following figure. Figure 10: Turn on the Module Using Driving Circuit The other way to control the PWRKEY is using a button directly. A TVS component is indispensable to be placed nearby the button for ESD protection. When pressing the key, electrostatic strike may generate from finger. A reference circuit is shown in the following figure. Figure 11: Turn on the Module Using Keystroke EC20_Hardware_Design Confidential / Released 30 / 83 Turn on pulsePWRKEY4.7K47K 100msPWRKEYS1Close to S1TVS LTE Module EC20 Hardware Design The turn on scenarios is illustrated as the following figure. Figure 12: Timing of Turning on Module NOTE Make sure that VBAT is stable before pulling down PWRKEY pin. The time between them is no less than 30ms. 3.7.2. Turn off Module The following procedures can be used to turn off the module:
Normal power down procedure: Turn off the module using the PWRKEY pin. Normal power down procedure: Turn off the module using command AT+QPOWD. 3.7.2.1. Turn off Module Using the PWRKEY Pin Driving the PWRKEY to a low level voltage for at least 0.6s, the module will execute power-down procedure after PWRKEY is released. The power-down scenario is illustrated as the following figure. EC20_Hardware_Design Confidential / Released 31 / 83 VIL 0.5VVIH 1.3VVBATPWRKEY 100msRESET_NSTATUS(OD) 0.5s 7.5sInactiveActiveUARTNOTEInactiveActiveUSB 9s LTE Module EC20 Hardware Design Figure 13: Timing of Turning off Module 3.7.2.2. Turn off Module Using AT Command It is also a safe way to use AT command AT+QPOWD to turn off the module, which is similar to turning off the module via PWRKEY Pin. Please refer to document [2] for details about the AT command of AT+QPOWD. 3.8. Reset the Module The RESET_N can be used to reset the module. You can reset the module by driving the RESET_N to a low level voltage for more than 150ms and then releasing it. Table 8: RESET_N Pin Description Pin Name Pin No. Description DC Characteristics Comment RESET_N 20 Reset the module. VIHmax=2.1V VIHmin=1.3V VILmax=0.5V Pull-up to 1.8V internally. Active low. The recommended circuit is similar to the PWRKEY control circuit. You can use open drain/collector driver or button to control the RESET_N. EC20_Hardware_Design Confidential / Released 32 / 83 VBATPWRKEYLog off network about 1s to 60s 0.6sRUNNINGPower-down procedureOFFModuleStatusSTATUS(OD) LTE Module EC20 Hardware Design Figure 14: Reference Circuit of RESET_N by Using Driving Circuit Figure 15: Reference Circuit of RESET_N by Using Button The reset scenario is illustrated as the following figure. Figure 16: Timing of Resetting Module NOTES 1. Use the RESET_N only when turning off the module by the command AT+QPOWD and the PWRKEY pin failed. 2. Ensure that there is no large capacitance on the PWRKEY and RESET_N pins. EC20_Hardware_Design Confidential / Released 33 / 83 Reset pulseRESET_N4.7K47K 150msRESET_NS2Close to S2TVSVIL 0.5VVIH 1.3VVBAT150msRESETTINGModule StatusRUNNINGRESET_NRUNNING 9s LTE Module EC20 Hardware Design 3.9. USIM Card Interface The USIM card interface circuitry meets ETSI and IMT-2000 SIM interface requirements. Both 1.8V and 3.0V USIM cards are supported. Table 9: Pin Definition of the USIM Interface Pin Name Pin No. I/O Description Comment USIM_VDD 14 PO Power supply for USIM card. Either 1.8V or 3.0V is supported by the module automatically. USIM_DATA 15 IO Data signal of USIM card. USIM_CLK 16 DO Clock signal of USIM card. USIM_RST 17 DO Reset signal of USIM card. USIM_PRE SENCE 13 DI USIM card insertion detection. USIM_GND 10 Specified ground for USIM card. EC20 supports USIM card hot-plug via the USIM_PRESENCE pin. It supports low level and high level detection, which is disabled by default. For details, refer to document [2] about the command AT+QSIMDET. The following figure shows the reference design of the 8-pin USIM connector. Figure 17: Reference Circuit of 8-Pin USIM Connector EC20_Hardware_Design Confidential / Released 34 / 83 ModuleUSIM_VDDUSIM_GNDUSIM_RSTUSIM_CLKUSIM_DATAUSIM_PRESENCE22R22R22RVDD_EXT51K100nFUSIM ConnectorGNDGND33pF33pF33pFVCCRSTCLKIOVPPGNDGNDUSIM_VDD15K LTE Module EC20 Hardware Design If you do not need the USIM card detection function, keep USIM_PRESENCE unconnected. The reference circuit for using a 6-pin USIM card connector is illustrated as the following figure. Figure 18: Reference Circuit of 6-Pin USIM Connector In order to enhance the reliability and availability of the USIM card in your application, please follow the criteria below in the USIM circuit design:
Keep layout of USIM card as close as possible to the module. Assure the length of the trace is less than 200mm. Keep USIM card signal away from RF and VBAT alignment. Assure the ground between module and USIM connector short and wide. Keep the width of ground and USIM_VDD no less than 0.5mm to maintain the same electric potential. To avoid cross-talk between USIM_DATA and USIM_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. The 22ohm resistors should be added in series between the module and the USIM card so as to suppress the EMI spurious transmission and enhance the ESD protection. The 33pF capacitors are used for filtering interference of EGSM900. Please note that the USIM peripheral circuit should be close to the USIM connector. The pull-up resistor on USIM_DATA line can improve anti-jamming capability when long layout trace and sensitive occasion is applied, and should be placed close to the USIM connector. EC20_Hardware_Design Confidential / Released 35 / 83 ModuleUSIM_VDDUSIM_GNDUSIM_RSTUSIM_CLKUSIM_DATA22R22R22R100nFUSIM ConnectorGND33pF33pF33pFVCCRSTCLKIOVPPGNDGND15KUSIM_VDD LTE Module EC20 Hardware Design 3.10. USB Interface EC20 contains one integrated Universal Serial Bus (USB) transceiver which complies with the USB 2.0 specification and supports high-speed (480Mbps) and full-speed (12Mbps) mode. The USB interface is used for AT command, data transmission, GNSS NMEA sentences output, software debug and firmware upgrade. The following table shows the pin definition of USB interface. Table 10: USB Pin Description Pin Name Pin No. I/O Description Comment USB_DP 69 USB_DM 70 USB_VBUS 71 GND 72 IO IO PI USB differential data bus (positive). USB differential data bus (minus). Used for detecting the USB connection. Ground Require differential impedance of 90. Require differential impedance of 90. 3.0~5.25V Typical 5.0V More details about the USB 2.0 specifications, please visit http://www.usb.org/home. The USB interface is recommended to be reserved for firmware upgrade in your design. The following figure shows the recommended test points. Figure 19: Test Points for Firmware Upgrade EC20_Hardware_Design Confidential / Released 36 / 83 ModuleUSB_DMUSB_DPVBAT_BBUSB_VBUSPWRKEYGNDVBAT_RFUSB_DMUSB_DPVBATUSB_VBUSPWRKEYGNDConnectorESD ArrayGND LTE Module EC20 Hardware Design In order to ensure the USB interface design corresponding with the USB 2.0 specification, please comply with the following principles. It is important to route the USB signal traces as differential pairs with total grounding. The impedance of USB differential trace is 90ohm. Do not route signal traces under crystals, oscillators, magnetic devices and RF signal traces. It is important to route the USB differential traces in inner-layer with ground shielding not only upper and lower layer but also right and left side. Pay attention to the influence of junction capacitance of ESD component on USB data lines. Typically, the capacitance value should be less than 2pF. Keep the ESD components as close as possible to the connector. Keep USB data test points traces short to avoid noise coupled on USB data lines. If possible, reserve 0R resistor on these two lines. NOTE EC20 module can only be used as a slave device. 3.11. UART Interface The module provides two UART interfaces: main UART interface and debug UART interface. The following shows the different features. Main UART interface supports 9600, 19200, 38400, 57600, 115200, 230400, 460800, 921600bps baud rate, the default is 115200bps. This interface can be used for data transmission and AT communication. Debug UART interface supports 115200bps. It can be used for Linux console, log and GNSS NMEA output. The following tables show the pin definition. Table 11: Pin Definition of the UART Interface Pin Name Pin No. I/O Description Comment RI DCD CTS 62 63 64 DO DO DO Ring indicator 1.8V power domain Data carrier detection 1.8V power domain Clear to send 1.8V power domain EC20_Hardware_Design Confidential / Released 37 / 83 LTE Module EC20 Hardware Design RTS DTR TXD RXD 65 66 67 68 DI DI DO DI Request to send 1.8V power domain Sleep mode control 1.8V power domain Transmit data 1.8V power domain Receive data 1.8V power domain Table 12: Pin Definition of the Debug UART Interface Pin Name Pin No. I/O Description Comment DBG_TXD 12 DBG_RXD 11 DO DI Transmit data 1.8V power domain Receive data 1.8V power domain The logic levels are described in the following table. Table 13: Logic Levels of Digital I/O Parameter VIL VIH VOL VOH Min.
-0.3 1.2 0 1.35 Max. 0.6 2.0 0.45 1.8 Unit V V V V Module provides 1.8V UART interface. A level translator should be used if your application is equipped with a 3.3V UART interface. A level translator TXS0108EPWR provided by Texas Instrument is recommended. The following figure shows the reference design. EC20_Hardware_Design Confidential / Released 38 / 83 LTE Module EC20 Hardware Design Figure 20: Reference Circuit with Translator Chip Please visit http://www.ti.com for more information. Another example with transistor translation circuit is shown as below. The circuit of dotted line can refer to the circuit of solid line. Please pay attention to direction of connection. Input dotted line of module should refer to input solid line of the module. Output dotted line of module should refer to output solid line of the module. NOTE Figure 21: Reference Circuit with Transistor Circuit Transistor circuit solution is not suitable for high baud rate which is more than 460Kbps. EC20_Hardware_Design Confidential / Released 39 / 83 VCCAVCCBOEA1A2A3A4A5A6A7A8GNDB1B2B3B4B5B6B7B8VDD_EXTRIDCDRTSRXDDTRCTSTXD51K51K0.1uF0.1uFRI_MCUDCD_MCURTS_MCURXD_MCUDTR_MCUCTS_MCUTXD_MCUVDD_MCUTranslatorMCU/ARM/TXD/RXDVDD_EXT10KVCC_MCU4.7K10KVDD_EXTTXDRXDRTSCTSDTRRI/RTS/CTSGNDGPIODCDModuleGPIOEINTVDD_EXT4.7KGND1nF1nF LTE Module EC20 Hardware Design 3.12. PCM and I2C Interface EC20 provides one Pulse Code Modulation (PCM) digital interface for audio design, which supports the following modes:
Primary mode (short sync, works as both master and slave) Auxiliary mode (long sync, works as master only) In primary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising edge; the PCM_SYNC falling edge represents the MSB. In this mode, PCM_CLK supports 128, 256, 512, 1024, 2048 and 4096kHz for different speech codec. In auxiliary mode, the data is sampled on the falling edge of the PCM_CLK and transmitted on the rising edge; while the PCM_SYNC rising edge represents the MSB. In this mode, PCM interface operates with a 128kHz PCM_CLK and an 8kHz, 50% duty cycle PCM_SYNC only. EC20 supports 8-bit A-law and -law, and also 16-bit linear data formats. The following figures show the primary modes timing relationship with 8kHz PCM_SYNC and 2048kHz PCM_CLK and auxiliary modes timing relationship with 8kHz PCM_SYNC and 128kHz PCM_CLK. Figure 22: Primary Mode Timing EC20_Hardware_Design Confidential / Released 40 / 83 PCM_CLKPCM_SYNCPCM_OUTMSBLSBMSBMSBLSBMSBPCM_IN125us12256255 LTE Module EC20 Hardware Design Figure 23: Auxiliary Mode Timing The following table shows the pin definition of PCM and I2C interface which can be applied on audio codec design. Table 14: Pin Definition of PCM and I2C Interface Pin Name Pin No. I/O Description Comment PCM_IN 24 DI PCM data input 1.8V power domain PCM_OUT 25 DO PCM data output 1.8V power domain PCM_SYNC 26 PCM_CLK I2C_SCL I2C_SDA 27 41 42 IO IO PCM data frame sync signal 1.8V power domain PCM data bit clock 1.8V power domain OD I2C serial clock Require external pull-up to 1.8V OD I2C serial data Require external pull-up to 1.8V Clock and mode can be configured by AT command, and the default configuration is master mode using short sync data format with 2048kHz PCM_CLK and 8kHz PCM_SYNC. In addition, EC20s firmware has integrated the configuration on ALC5616 application with I2C interface. Refer to document [2] about the command AT+QDAI for details. EC20_Hardware_Design Confidential / Released 41 / 83 PCM_CLKPCM_SYNCPCM_OUTMSBLSBPCM_IN125usMSB121615LSB LTE Module EC20 Hardware Design The following figure shows the reference design of PCM interface with external codec IC. NOTES Figure 24: Reference Circuit of PCM Application with Audio Codec 1. It is recommended to reserved RC (R=22ohm, C=22pF) circuit on the PCM lines, especially for PCM_CLK. 2. EC20 works as a master device pertaining to I2C interface. 3.13. ADC Function The module provides two analog-to-digital converters (ADC) to digitize the analog signal to 15-bit digital data such as battery voltage, temperature and so on. Using AT command AT+QADC=0 can read the voltage value on ADC0 pin. Using AT command AT+QADC=1 can read the voltage value on ADC1 pin. For more details of these AT commands, please refer to document [2]. In order to improve the accuracy of ADC, the trace of ADC should be surrounded by ground. Table 15: Pin Definition of the ADC Pin Name Pin No. Description ADC0 ADC1 45 44 General purpose analog to digital converter General purpose analog to digital converter EC20_Hardware_Design Confidential / Released 42 / 83 PCM_INPCM_OUTPCM_SYNCPCM_CLKI2C_SCLI2C_SDAModule1.8V4.7K4.7KBCLKLRCKDACADCSCLSDABIASMICBIASINPINNLOUTPLOUTNALC5616 LTE Module EC20 Hardware Design The following table describes the characteristic of the ADC function. Table 16: Characteristic of the ADC Parameter Min. Typ. Max. ADC0 Voltage Range ADC1 Voltage Range ADC Resolution 0.3 0.3 VBAT_BB VBAT_BB 15 Unit V V bits 3.14. Network Status Indication The network indication pins can be used to drive a network status indicator LED. The module provides two pins which are NET_MODE and NET_STATUS. The following tables describe pin definition and logic level changes in different network status. Table 17: Pin Definition of Network Indicator Pin Name Pin No. I/O Description Comment NET_MODE 5 DO NET_STATUS 6 DO Indicate the module network registration mode. Indicate the module network activity status. 1.8V power domain 1.8V power domain Table 18: Working State of the Network Indicator Pin Name Status Description NET_MODE Always High Always Low Registered in LTE network Others Flicker slowly (200ms High/1800ms Low) Network searching NET_STATUS Flicker slowly (1800ms High/200ms Low) Idle Flicker quickly (125ms High/125ms Low) Data transfer is ongoing Always High Voice calling EC20_Hardware_Design Confidential / Released 43 / 83 LTE Module EC20 Hardware Design A reference circuit is shown in the following figure. Figure 25: Reference Circuit of the Network Indicator 3.15. Operating Status Indication The STATUS pin is an open drain output for indicating the module operation status. You can connect it to a GPIO of DTE with pulled up, or as LED indication circuit as below. When the module is turned on normally, the STATUS will present the low state. Otherwise, the STATUS will present high-impedance state. Table 19: Pin Definition of STATUS Pin Name Pin No. I/O Description Comment STATUS 61 OD Indicate the module operation status Require external pull-up The following figure shows different design circuit of STATUS, you can choose either one according to your application demands. Figure 26: Reference Circuit of the STATUS EC20_Hardware_Design Confidential / Released 44 / 83 4.7K47KVBAT2.2KModuleNetwork IndicatorVDD_MCU10KModuleSTATUSMCU_GPIOModuleSTATUSVBAT2.2K LTE Module EC20 Hardware Design 3.16. Behavior of the RI You can use command AT+QCFG=risignaltype,physical to configure RI behavior:
No matter which port URC is presented on, URC will trigger the behavior on RI pin. NOTE URC can be output from UART port, USB AT port and USB modem port by command AT+QURCCFG. The default port is USB AT port. In addition, RI behavior can be configured flexible. The default behavior of the RI is shown as below. Table 20: Behavior of the RI State Idle URC Response RI keeps high level RI outputs 120ms low pulse when new URC returns The RI behavior can be changed by command AT+QCFG=urc/ri/ring, refer to document [2] for details. EC20_Hardware_Design Confidential / Released 45 / 83 LTE Module EC20 Hardware Design 4 GNSS Receiver 4.1. General Description EC20 includes a fully integrated global navigation satellite system solution that supports gpsOne Gen8A of Qualcomm (GPS and GLONASS). Compared with GPS only, dual systems increase usable constellation, reduce coverage gaps and TTFF, and increase positioning accuracy, especially in rough urban environments. EC20 works in standalone mode, allows device to demodulate GNSS assistance data, calculate position without any assistance from the network, and suitable for various application needing lowest-cost, accurate position determination. EC20 supports Qualcomm gpsOneXTRA technology (one kind of A-GNSS), which can download XTRA file from the internet server to enhance the TTFF. XTRA file contains predicted GPS and GLONASS satellites coordinates and clock biases valid for up to 7days. It is the best if XTRA file is downloaded every 1-2 days. And EC20 also supports SBAS (including WAAS, EGNOS and MSAS), which will improve fix accuracy. EC20 provides power-saving solution named DPO (Dynamic Power Optimization), which attempts to turn off GNSS RF parts, reduces current consumption by 50% at most without impact on TTFF, thus extends battery life, and maximizes talk and standby time as well. EC20 supports standard NMEA-0183 protocol, and outputs NMEA sentences with 1Hz via USB interface by default. By default, EC20 GNSS engine is switched off, it has to be switched on with AT command. For more details about GNSS engine technology and configurations, please refer to document [3]. EC20_Hardware_Design Confidential / Released 46 / 83 LTE Module EC20 Hardware Design 4.2. GNSS Performance The following table shows EC20 GNSS performance. Table 21: GNSS Performance Parameter Description Conditions Sensitivity
(GNSS) Cold start Autonomous Reacquisition Autonomous Tracking Autonomous Cold start
@open sky TTFF
(GNSS) Warm start
@open sky Hot start
@open sky CEP-50 Accuracy
(GNSS) NOTES Autonomous XTRA enabled Autonomous XTRA enabled Autonomous XTRA enabled Autonomous
@open sky Typ.
-146
-156
-157 35 22 30 3.5 2 1.5 Unit dBm dBm dBm s s s s s s
<1.5 m 1. Tracking sensitivity: the lowest GPS signal value at the antenna port for which the module can keep on positioning for 3 minutes. 2. Reacquisition sensitivity: the lowest GPS signal value at the antenna port for which the module can fix position again within 3 minutes after loss of lock. 3. Cold start sensitivity: the lowest GPS signal value at the antenna port for which the module fixes position within 3 minutes after executing cold start command. EC20_Hardware_Design Confidential / Released 47 / 83 LTE Module EC20 Hardware Design 4.3. Layout Guideline The following layout guideline should be taken into account in your design. Maximize the distance between the GNSS antenna, the main antenna and Rx-diversity antenna. Noisy digital circuits such as the USIM card, USB interface, Camera module, Display connector and SD card should be away from the antenna. Use ground vias around the GNSS trace and sensitive analog signal traces to provide coplanar isolation and protection. Keep 50ohm characteristic impedance of the ANT_GNSS trace. Refer to Chapter 5 for GNSS reference design and antenna consideration. EC20_Hardware_Design Confidential / Released 48 / 83 LTE Module EC20 Hardware Design 5 Antenna Interface EC20 antenna interface includes a main antenna, an Rx-diversity antenna, which is used to resist the fall of signals caused by high speed movement and multipath effect, and a GNSS antenna. The antenna interface has an impedance of 50ohm. 5.1. Main/Rx-diversity Antenna Interface 5.1.1. Pin Definition The main antenna and Rx-diversity antenna pins definition are shown below. Table 22: Pin Definition of the RF Antenna Pin Name Pin No. I/O Description Comment ANT_MAIN ANT_DIV 49 35 IO AI 5.1.2. Operating Frequency Main antenna 50ohm impedance Receive diversity antenna 50ohm impedance Table 23: The Module Operating Frequencies 3GPP Band Transmit Receive B2 (1900) 1850 ~ 1910 1930 ~ 1990 B4 1710 ~ 1755 2110 ~ 2155 B5 (850/BC0) 824 ~ 849 B12 B17 699 ~ 716 704 ~ 716 869 ~ 894 728 ~ 746 734 ~ 746 Unit MHz MHz MHz MHz MHz EC20_Hardware_Design Confidential / Released 49 / 83 LTE Module EC20 Hardware Design 5.1.3. Reference Design The reference design of ANT_MAIN and ANT_DIV antenna is shown as below. It should reserve a -type matching circuit for better RF performance. The capacitors are not mounted by default. Figure 27: Reference Circuit of Antenna Interface NOTE Keep a proper distance between main antenna and Rx-diversity antenna to improve the receiving sensitivity. 5.2. GNSS Antenna Interface The following tables show the GNSS antenna pin definition and frequency specification. Table 24: Pin Definition of GNSS Antenna Pin Name Pin No. I/O Description Comment ANT_GNSS 47 AI GNSS antenna 50ohm impedance EC20_Hardware_Design Confidential / Released 50 / 83 ANT_MAINR1 0RC1ModuleMainantennaNMC2NMR2 0RC3Diversity antennaNMC4NMANT_DIV LTE Module EC20 Hardware Design Table 25: GNSS Frequency Type GPS Frequency 1575.42 1.023 GLONASS 1597.5 ~ 1605.8 The reference design of GNSS antenna is shown as below. Unit MHz MHz Figure 28: Reference Circuit of GNSS Antenna NOTES 1. You can choose an external LDO to supply power according to the active antenna. 2. If you design it with passive antenna, the VDD circuit is not needed. 5.3. Antenna Installation 5.3.1. Antenna Requirement The following table shows the requirement on main antenna, Rx-diversity antenna and GNSS antenna. Table 26: Antenna Requirements Type Requirements EC20_Hardware_Design Confidential / Released 51 / 83 GNSS AntennaVDDModuleANT_GNSS47nH10R0.1uF100pFNMNM LTE Module EC20 Hardware Design Frequency range: 1565 - 1607MHz Polarization: RHCP or linear VSWR: < 2 (Typ.) Passive antenna gain: > 0dBi Active antenna noise figure: < 1.5dB Active antenna gain: > -2dBi Active antenna embedded LNA gain: 20dB (Typ.) Active antenna total gain: > 18dBi (Typ.) VSWR: 2 Gain (dBi): 1 Max Input Power (W): 50 Input Impedance (ohm): 50 Polarization Type: Vertical Cable Insertion Loss: < 1dB
(GSM850/900, WCDMA B5, LTE B5/B12/B17) Cable Insertion Loss: < 1.5dB
(GSM1900, WCDMA B2/B4, LTE B2/B4) GNSS GSM/WCDMA/ LTE 5.3.2. Install the Antenna with RF Connector The following figure is the antenna installation with RF connector provided by HIROSE. The recommended RF connector is UF.L-R-SMT. EC20_Hardware_Design Confidential / Released 52 / 83 LTE Module EC20 Hardware Design Figure 29: Dimensions of the UF.L-R-SMT Connector (Unit: mm) You can use U.FL-LP serial connector listed in the following figure to match the UF.L-R-SMT. Figure 30: Mechanicals of UF.L-LP Connectors The following figure describes the space factor of mated connector. EC20_Hardware_Design Confidential / Released 53 / 83 LTE Module EC20 Hardware Design Figure 31: Space Factor of Mated Connector (Unit: mm) For more details, please visit http://www.hirose.com. EC20_Hardware_Design Confidential / Released 54 / 83 LTE Module EC20 Hardware Design 6 Electrical, Reliability and Radio Characteristics 6.1. Absolute Maximum Ratings Absolute maximum ratings for power supply and voltage on digital and analog pins of module are listed in the following table. Table 27: Absolute Maximum Ratings Parameter VBAT_RF/VBAT_BB USB_VBUS Peak Current of VBAT_BB Peak Current of VBAT_RF Voltage at Digital Pins Voltage at ADC0 Voltage at ADC1 Min.
-0.3
-0.3 0 0
-0.3 0 0 Max. Unit 4.7 5.5 0.8 1.8 2.3 VBAT_BB VBAT_BB V V A A V V V EC20_Hardware_Design Confidential / Released 55 / 83 LTE Module EC20 Hardware Design 6.2. Power Supply Ratings Table 28: The Module Power Supply Ratings Parameter Description Conditions Min. Typ. Max. Unit Voltage must stay within the VBAT_BB and min/max values, including VBAT_RF voltage drop, ripple and 3.3 3.8 4.3 V VBAT spikes. Voltage drop during transmitting burst Maximum power control level on GSM850 and EGSM900. Peak supply current Maximum power control IVBAT
(during transmission level on GSM850 and slot) EGSM900. 400 mV 1.8 2.0 A USB_VBUS USB detection 3.0 5.0 5.25 V 6.3. Operating Temperature The operating temperature is listed in the following table. Table 29: Operating Temperature Parameter Normal Temperature Min.
-35 Restricted Operation
-40 ~ -35 Storage Temperature
-45 NOTE Typ. 25 Max. Unit 75 75 ~ 85 90 C C C The maximum surface temperature may be up to 100C when module works at 85C ambient temperature. EC20_Hardware_Design Confidential / Released 56 / 83 LTE Module EC20 Hardware Design 6.4. Current Consumption The values of current consumption are shown below. Table 30: EC20 Current Consumption Parameter Description Conditions Typ. Unit OFF state Power down AT+CFUN=0 (USB disconnected) GSM DRX=2 (USB disconnected) Sleep state GSM DRX=9 (USB disconnected) WCDMA DRX=6 (USB disconnected) WCDMA DRX=9 (USB disconnected) GPRS data transfer
(GNSS off) IVBAT EDGE data transfer
(GNSS off) GSM850 4DL/1UL PCL=5 GSM850 3DL/2UL PCL=5 GSM850 2DL/3UL PCL=5 GSM850 1DL/4UL PCL=5 PCS1900 4DL/1UL PCL=0 PCS1900 3DL/2UL PCL=0 PCS1900 2DL/3UL PCL=0 PCS1900 1DL/4UL PCL=0 GSM850 4DL/1UL PCL=8 GSM850 3DL/2UL PCL=8 GSM850 2DL/3UL PCL=8 GSM850 1DL/4UL PCL=8 PCS1900 4DL/1UL PCL=2 PCS1900 3DL/2UL PCL=2 PCS1900 2DL/3UL PCL=2 20 1.05 3.7 1.8 2.8 1.5 233 382 426 510 198 333 385 443 160 261 351 442 154 249 333 uA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA EC20_Hardware_Design Confidential / Released 57 / 83 LTE Module EC20 Hardware Design PCS1900 1DL/4UL PCL=2 WCDMA B2 HSDPA @max power WCDMA B2 HSUPA @max power WCDMA B4 HSDPA @max power WCDMA B4 HSUPA @max power WCDMA B5 HSDPA @max power WCDMA B5 HSUPA @max power LTE-FDD B2 @max power LTE-FDD B4 @max power LTE-TDD B5 @max power LTE-TDD B12 @max power LTE-TDD B17 @max power GSM850 @PCL=5 PCS1900 @PCL=0 WCDMA B2 @max power WCDMA data transfer
(GNSS off) LTE data transfer
(GNSS off) GSM voice call WCDMA voice call WCDMA B4 @max power WCDMA B5 @max power 413 496 498 442 465 464 445 584 564 521 432 431 247 207 470 429 450 mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA mA 6.5. RF Output Power Please refer to TUNE UP document. 6.6. RF Receiving Sensitivity The following table shows the conducted RF receiving sensitivity of EC20 module. EC20_Hardware_Design Confidential / Released 58 / 83 LTE Module EC20 Hardware Design Table 31: EC20 Conducted RF Receiving Sensitivity Frequency GSM850 PCS1900 WCDMA B2 WCDMA B4 WCDMA B5 LTE FDD B2 (20M) LTE FDD B4 (20M) LTE FDD B5 (10M) LTE FDD B12 (10M) LTE FDD B17 (10M) Receive Sensitivity (Typ.)
-111dBm
-109dBm
-111dBm
-111dBm
-112dBm
-96dBm
-96dBm
-98dBm
-99dBm
-99dBm 6.7. Electrostatic Discharge The module is not protected against electrostatics discharge (ESD) in general. Consequently, it is subject to ESD handling precautions that typically apply to ESD sensitive components. Proper ESD handling and packaging procedures must be applied throughout the processing, handling and operation of any application that incorporates the module. The following table shows the module electrostatics discharge characteristics. Table 32: Electrostatics Discharge Characteristics Tested Points Contact Discharge Air Discharge Unit VBAT, GND All Antenna Interfaces Other Interfaces 5 4 0.5 10 8 1 kV kV kV EC20_Hardware_Design Confidential / Released 59 / 83 LTE Module EC20 Hardware Design 7 Mechanical Dimensions This chapter describes the mechanical dimensions of the module. All dimensions are measured in mm. 7.1. Mechanical Dimensions of the Module Figure 32: Module Top and Side Dimensions EC20_Hardware_Design Confidential / Released 60 / 83
(32+/-0.15)(29+/-0.15)0.82.4+/-0.2 LTE Module EC20 Hardware Design Figure 33: Module Bottom Dimensions (Bottom View) Figure 34: Bottom Pads Dimensions (Bottom View) EC20_Hardware_Design Confidential / Released 61 / 83 29.032.0 LTE Module EC20 Hardware Design 7.2. Footprint of Recommendation Figure 35: Recommended Footprint (Top View) NOTE In order to maintain the module, keep about 3mm between the module and other components in the host PCB. EC20_Hardware_Design Confidential / Released 62 / 83 2932Keepout areaKeepout area LTE Module EC20 Hardware Design Figure 36: Recommended Stencil NOTES 1. The thickness of stencil for the pads at the bottom of module is recommended as 0.18mm, and the thickness of LCC pins is recommended as 0.2mm. 2. For better SMT solder, the GND pad at the bottom of the module is divided into four small pads. 3. The red areas are recommended footprint shown in Figure 35. EC20_Hardware_Design Confidential / Released 63 / 83 LTE Module EC20 Hardware Design If you design with pins 117~140, the following footprint is recommended. Figure 37: Recommended Footprint with Pins 117~140 EC20_Hardware_Design Confidential / Released 64 / 83 29.032.0Keepout area LTE Module EC20 Hardware Design 7.3. Top View of the Module Figure 38: Top View of the Module 7.4. Bottom View of the Module Figure 39: Bottom View of the Module EC20_Hardware_Design Confidential / Released 65 / 83 LTE Module EC20 Hardware Design 8 Storage and Manufacturing 8.1. Storage EC20 is stored in the vacuum-sealed bag. The restriction of storage condition is shown as below. Shelf life in sealed bag is 12 months at < 40C/90%RH. After this bag is opened, devices that will be subjected to reflow solder or other high temperature process must be:
Mounted within 72 hours at factory conditions of 30C/60%RH. Stored at <10% RH. Devices require bake before mounting, if:
Humidity indicator card is >10% when read 23C5C. Mounted for more than 72 hours at factory conditions of 30C/60% RH. If baking is required, devices may be baked for 48 hours at 125C5C. NOTE As plastic container cannot be subjected to high temperature, module needs to be taken out from container to high temperature (125C) bake. If shorter bake times are desired, please refer to IPC/JEDECJ-STD-033 for bake procedure. 8.2. Manufacturing and Welding 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 0.18mm. For details, please refer to document [4]. EC20_Hardware_Design Confidential / Released 66 / 83 LTE Module EC20 Hardware Design It is suggested that peak reflow temperature is 235 ~ 245C (for SnAg3.0Cu0.5 alloy). Absolute max reflow temperature is 260C. To avoid damage to 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 40: Liquids Temperature EC20_Hardware_Design Confidential / Released 67 / 83 Time5010015020025030050100150200250 160 C 200 C217070s~120s40s~60sBetween 1~3 C/sPreheatHeatingCoolingCsLiquids Temperature Temperature LTE Module EC20 Hardware Design 8.3. Packaging EC20 is packaged in the tap and reel carriers. One reel is 11.53m length and contains 250pcs modules. The figure below shows the package details, measured in mm. Figure 41: Carrier Tape EC20_Hardware_Design Confidential / Released 68 / 83 30.30.1529.30.1530.30.1532.50.1533.50.150.350.054.20.153.10.1532.50.1533.50.154.000.12.000.11.750.120.200.1544.000.344.000.11.500.1Direction of feedCover tape1310044.5+0.20-0.0048.5 LTE Module EC20 Hardware Design 9 Appendix A Reference Table 33: Related Documents SN Document Name Remark Quectel_EC20_Power_Management_Application_ EC20 Power Management Application Note Note Quectel_EC20_AT_Commands_Manual EC20 AT Commands Manual Quectel_EC20_GNSS_AT_Commands_Manual EC20 GNSS AT Commands Manual Quectel_Module_Secondary_SMT_User_Guide Module Secondary SMT User Guide
[1]
[2]
[3]
[4]
Table 34: Terms and Abbreviations Abbreviation Description AMR bps Adaptive Multi-rate Bits Per Second CHAP Challenge Handshake Authentication Protocol CS CSD CTS Coding Scheme Circuit Switched Data Clear To Send DC-HSPA+
Dual-carrier High Speed Packet Access DFOTA Delta Firmware Upgrade Over The Air DL DTR DTX Downlink Data Terminal Ready Discontinuous Transmission EC20_Hardware_Design Confidential / Released 69 / 83 LTE Module EC20 Hardware Design EFR EGSM ESD FDD FR GLONASS GMSK GNSS GPS GSM HR HSPA HSDPA HSUPA I/O Inorm LED LNA LTE MIMO MO MS MT PAP PCB Enhanced Full Rate Extended GSM900 band (includes standard GSM900 band) Electrostatic Discharge Frequency Division Duplex Full Rate GLObalnaya NAvigatsionnaya Sputnikovaya Sistema, the Russian Global Navigation Satellite System Gaussian Minimum Shift Keying Global Navigation Satellite System Global Positioning System Global System for Mobile Communications Half Rate High Speed Packet Access High Speed Downlink Packet Access High Speed Uplink Packet Access Input/Output Normal Current Light Emitting Diode Low Noise Amplifier Long Term Evolution Multiple Input Multiple Output Mobile Originated Mobile Station (GSM engine) Mobile Terminated Password Authentication Protocol Printed Circuit Board EC20_Hardware_Design Confidential / Released 70 / 83 LTE Module EC20 Hardware Design PDU PPP QAM QPSK RF RHCP Rx SIM SMS TDD Protocol Data Unit Point-to-Point Protocol Quadrature Amplitude Modulation Quadrature Phase Shift Keying Radio Frequency Right Hand Circularly Polarized Receive Subscriber Identification Module Short Message Service Time Division Duplexing TDMA Time Division Multiple Access TD-SCDMA Time Division-Synchronous Code Division Multiple Access TX UL UMTS URC USIM Vmax Vnorm Vmin VIHmax VIHmin VILmax VILmin VImax Transmitting Direction Uplink Universal Mobile Telecommunications System Unsolicited Result Code Universal Subscriber Identity Module Maximum Voltage Value Normal Voltage Value Minimum Voltage Value Maximum Input High Level Voltage Value Minimum Input High Level Voltage Value Maximum Input Low Level Voltage Value Minimum Input Low Level Voltage Value Absolute Maximum Input Voltage Value EC20_Hardware_Design Confidential / Released 71 / 83 LTE Module EC20 Hardware Design VImin VOHmax VOHmin VOLmax VOLmin VSWR Absolute Minimum Input Voltage Value Maximum Output High Level Voltage Value Minimum Output High Level Voltage Value Maximum Output Low Level Voltage Value Minimum Output Low Level Voltage Value Voltage Standing Wave Ratio WCDMA Wideband Code Division Multiple Access EC20_Hardware_Design Confidential / Released 72 / 83 LTE Module EC20 Hardware Design 10 Appendix B GPRS Coding Scheme Table 35: Description of Different Coding Schemes Scheme Code Rate USF Pre-coded USF CS-1 CS-2 CS-3 CS-4 1/2 3 3 2/3 3/4 3 6 3 6 Radio Block excl.USF and BCS 181 268 312 BCS Tail Coded Bits Punctured Bits 40 4 456 0 16 4 588 132 16 4 676 220 Data Rate Kb/s 9.05 13.4 15.6 21.4 EC20_Hardware_Design Confidential / Released 73 / 83 1 3 12 428 16
-
456
-
LTE Module EC20 Hardware Design 11 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 36: GPRS Multi-slot Classes Multislot Class Downlink Slots Uplink Slots Active Slots 1 2 3 4 5 6 7 8 9 10 11 12 1 2 2 3 2 3 3 4 3 4 4 4 1 1 2 1 2 2 3 1 2 2 3 4 2 3 3 4 4 4 4 5 5 5 5 5 EC20_Hardware_Design Confidential / Released 74 / 83 UMTS/HSPA Module EC20 Hardware Design 12 Appendix D EDGE Modulation and Coding Scheme Table 37: EDGE Modulation and Coding Scheme Coding Scheme Modulation Coding Family 1 Timeslot 2 Timeslot 4 Timeslot
/
/
/
/
C B A C B A B A A CS-1:
CS-2:
CS-3:
CS-4:
GMSK GMSK GMSK GMSK MCS-1 GMSK MCS-2 GMSK MCS-3 GMSK MCS-4 GMSK MCS-5 8-PSK MCS-6 8-PSK MCS-7 8-PSK MCS-8 8-PSK MCS-9 8-PSK 9.05kbps 18.1kbps 36.2kbps 13.4kbps 26.8kbps 53.6kbps 15.6kbps 31.2kbps 62.4kbps 21.4kbps 42.8kbps 85.6kbps 8.80kbps 17.60kbps 35.20kbps 11.2kbps 22.4kbps 44.8kbps 14.8kbps 29.6kbps 59.2kbps 17.6kbps 35.2kbps 70.4kbps 22.4kbps 44.8kbps 89.6kbps 29.6kbps 59.2kbps 118.4kbps 44.8kbps 89.6kbps 179.2kbps 54.4kbps 108.8kbps 217.6kbps 59.2kbps 118.4kbps 236.8kbps EC20_Hardware_Design Confidential / Released 75 / 83
| frequency | equipment class | purpose | ||
|---|---|---|---|---|
| 1 | 2016-05-10 | 1852.5 ~ 1907.5 | PCB - PCS Licensed Transmitter | Original Equipment |
| app s | Applicant Information | |||||
|---|---|---|---|---|---|---|
| 1 | Effective |
2016-05-10
|
||||
| 1 | Applicant's complete, legal business name |
Quectel Wireless Solutions Company Limited
|
||||
| 1 | FCC Registration Number (FRN) |
0018988279
|
||||
| 1 | Physical Address |
Building 5, Shanghai Business Park PhaseIII
|
||||
| 1 |
Shanghai, N/A 200233
|
|||||
| 1 |
China
|
|||||
| app s | TCB Information | |||||
| 1 | TCB Application Email Address |
t******@siemic.com
|
||||
| 1 | TCB Scope |
B1: Commercial mobile radio services equipment in the following 47 CFR Parts 20, 22 (cellular), 24,25 (below 3 GHz) & 27
|
||||
| app s | FCC ID | |||||
| 1 | Grantee Code |
XMR
|
||||
| 1 | Equipment Product Code |
201603EC20
|
||||
| app s | Person at the applicant's address to receive grant or for contact | |||||
| 1 | Name |
J****** x****
|
||||
| 1 | Telephone Number |
+8602******** Extension:
|
||||
| 1 | Fax Number |
+8621********
|
||||
| 1 |
j******@quectel.com
|
|||||
| app s | Technical Contact | |||||
| n/a | ||||||
| app s | Non Technical Contact | |||||
| n/a | ||||||
| app s | Confidentiality (long or short term) | |||||
| 1 | Does this application include a request for confidentiality for any portion(s) of the data contained in this application pursuant to 47 CFR § 0.459 of the Commission Rules?: | Yes | ||||
| 1 | Long-Term Confidentiality Does this application include a request for confidentiality for any portion(s) of the data contained in this application pursuant to 47 CFR § 0.459 of the Commission Rules?: | No | ||||
| if no date is supplied, the release date will be set to 45 calendar days past the date of grant. | ||||||
| app s | Cognitive Radio & Software Defined Radio, Class, etc | |||||
| 1 | Is this application for software defined/cognitive radio authorization? | No | ||||
| 1 | Equipment Class | PCB - PCS Licensed Transmitter | ||||
| 1 | Description of product as it is marketed: (NOTE: This text will appear below the equipment class on the grant) | Multi-mode LTE module | ||||
| 1 | Related OET KnowledgeDataBase Inquiry: Is there a KDB inquiry associated with this application? | No | ||||
| 1 | Modular Equipment Type | Single Modular Approval | ||||
| 1 | Purpose / Application is for | Original Equipment | ||||
| 1 | Composite Equipment: Is the equipment in this application a composite device subject to an additional equipment authorization? | No | ||||
| 1 | Related Equipment: Is the equipment in this application part of a system that operates with, or is marketed with, another device that requires an equipment authorization? | No | ||||
| 1 | Grant Comments | Single Modular Approval. Output power is conducted. This device is to be used in mobile or fixed applications only. Antenna gain including cable loss must not exceed 10.69 dBi of frequency band 699-716MHz, 5.95 dBi of frequency band 824-849MHz, 6.5 dBi of frequency band 1710-1755MHz, 3.5 dBi of frequency band 1850-1910MHz,for the purpose of satisfying the requirements of 2.1043 and 2.1091. They operate at frequencies of 1.5 GHz or below and their effective radiated power (ERP) is 1.5 watts or more, or they operate at frequencies above 1.5 GHz and their ERP is 3 watts or more. The antenna(s) used for this transmitter must be installed to provide a separation distance of at least 20cm from all persons and must not be co-located or operated in conjunction with any antenna or transmitter not described under this FCC ID. The final product operating with this transmitter must include operating instructions and antenna installation instructions, for end-users and installers to satisfy RF exposure compliance requirements. Compliance of this device in all final product configurations is the responsibility of the Grantee. Installation of this device into specific final products may require the submission of a Class II permissive change application containing data pertinent to RF Exposure, spurious emissions, ERP/EIRP, and host/module authentication, or new application if appropriate. Installation of this device into specific final products may require the submission of a Class II permissive change application containing data pertinent to RF Exposure, spurious emissions, ERP/EIRP, and host/module authentication, or new application if appropriate. | ||||
| 1 | Is there an equipment authorization waiver associated with this application? | No | ||||
| 1 | If there is an equipment authorization waiver associated with this application, has the associated waiver been approved and all information uploaded? | No | ||||
| app s | Test Firm Name and Contact Information | |||||
| 1 | Firm Name |
SIEMIC (Shenzhen-China) Laboratories
|
||||
| 1 | Name |
L**** B********
|
||||
| 1 | Telephone Number |
86-07******** Extension:
|
||||
| 1 | Fax Number |
86075********
|
||||
| 1 |
l******@siemic.com
|
|||||
| Equipment Specifications | |||||||||||||||||||||||||||||||||||||||||
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| Line | Rule Parts | Grant Notes | Lower Frequency | Upper Frequency | Power Output | Tolerance | Emission Designator | Microprocessor Number | |||||||||||||||||||||||||||||||||
| 1 | 1 | 22H | 824.2 | 848.8 | 1.714 | 0.0251 ppm | 322KGXW | ||||||||||||||||||||||||||||||||||
| 1 | 2 | 24E | 1850.2 | 1909.8 | 0.738 | 0.0122 ppm | 323KGXW | ||||||||||||||||||||||||||||||||||
| 1 | 3 | 22H | 826.4 | 846.6 | 0.209 | 0.0132 ppm | 4M73F9W | ||||||||||||||||||||||||||||||||||
| 1 | 4 | 27 | 1712.4 | 1752.6 | 0.17 | 0.0058 ppm | 4M71F9W | ||||||||||||||||||||||||||||||||||
| 1 | 5 | 24E | 1852.4 | 1907.6 | 0.168 | 0.0043 ppm | 4M70F9W | ||||||||||||||||||||||||||||||||||
| 1 | 6 | 24E | 1852.5 | 1907.5 | 0.162 | 0.0064 ppm | 19M6G7D | ||||||||||||||||||||||||||||||||||
| 1 | 7 | 24E | 1852.5 | 1907.5 | 0.155 | 0.0064 ppm | 19M5W7D | ||||||||||||||||||||||||||||||||||
| 1 | 8 | 27 | 1712.5 | 1752.5 | 0.166 | 0.0092 ppm | 1M31G7D | ||||||||||||||||||||||||||||||||||
| 1 | 9 | 27 | 1712.5 | 1752.5 | 0.156 | 0.0092 ppm | 19M4G7D | ||||||||||||||||||||||||||||||||||
| 1 | 1 | 27 | 1712.5 | 1752.5 | 0.135 | 0.0092 ppm | 19M6W7D | ||||||||||||||||||||||||||||||||||
| 1 | 11 | 27 | 1712.5 | 1752.5 | 0.139 | 0.0092 ppm | 14M9W7D | ||||||||||||||||||||||||||||||||||
| 1 | 12 | 22H | 826.5 | 846.5 | 0.195 | 0.0155 ppm | 5M06G7D | ||||||||||||||||||||||||||||||||||
| 1 | 13 | 22H | 826.5 | 846.5 | 0.19 | 0.0155 ppm | 10M2G7D | ||||||||||||||||||||||||||||||||||
| 1 | 14 | 22H | 826.5 | 846.5 | 0.161 | 0.0155 ppm | 10M1W7D | ||||||||||||||||||||||||||||||||||
| 1 | 15 | 27 | 699.7 | 715.3 | 0.182 | 0.0064 ppm | 1M34G7D | ||||||||||||||||||||||||||||||||||
| 1 | 16 | 27 | 699.7 | 715.3 | 0.181 | 0.0064 ppm | 10M1G7D | ||||||||||||||||||||||||||||||||||
| 1 | 17 | 27 | 699.7 | 715.3 | 0.146 | 0.0064 ppm | 10M3W7D | ||||||||||||||||||||||||||||||||||
| 1 | 18 | 27 | 699.7 | 715.3 | 0.149 | 0.0064 ppm | 3M16W7D | ||||||||||||||||||||||||||||||||||
| 1 | 19 | 27 | 706.5 | 713.5 | 0.176 | 0.0155 ppm | 5M14G7D | ||||||||||||||||||||||||||||||||||
| 1 | 2 | 27 | 706.5 | 713.5 | 0.169 | 0.0155 ppm | 10M1G7D | ||||||||||||||||||||||||||||||||||
| 1 | 21 | 27 | 706.5 | 713.5 | 0.148 | 0.0155 ppm | 10M1W7D | ||||||||||||||||||||||||||||||||||
| 1 | 22 | 27 | 706.5 | 713.5 | 0.15 | 0.0155 ppm | 5M10W7D | ||||||||||||||||||||||||||||||||||
some individual PII (Personally Identifiable Information) available on the public forms may be redacted, original source may include additional details
This product uses the FCC Data API but is not endorsed or certified by the FCC