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EC20_4g模块硬件开发手册.pdf
About the Document
Contents
Table Index
Figure Index
1 Introduction
1.1. Safety Information
2 Product Concept
2.1. General Description
2.2. Key Features
2.3. Functional Diagram
2.4. Evaluation Board
3 Application Interface
3.1. General Description
3.2. Pin Assignment
3.3. Pin Description
3.4. Operating Modes
3.5. Power Saving
3.5.1. Sleep Mode
3.5.1.1. UART Application
3.5.1.2. USB Application with USB Remote Wakeup Function
3.5.1.3. USB Application with USB Suspend/Resume and RI Function
3.5.1.4. USB Application without USB Suspend Function
3.5.2. Airplane Mode
3.6. Power Supply
3.6.1. Power Supply Pins
3.6.2. Decrease Voltage Drop
3.6.3. Reference Design for Power Supply
3.6.4. Monitor the Power Supply
3.7. Turn on and off Scenarios
3.7.1. Turn on Module Using the PWRKEY
3.7.2. Turn off Module
3.7.2.1. Turn off Module Using the PWRKEY Pin
3.7.2.2. Turn off Module Using AT Command
3.8. Reset the Module
3.9. USIM Card Interface
3.10. USB Interface
3.11. UART Interface
3.12. PCM and I2C Interface
3.13. ADC Function
3.14. Network Status Indication
3.15. Operating Status Indication
3.16. Behavior of the RI
4 GNSS Receiver
4.1. General Description
4.2. GNSS Performance
4.3. Layout Guideline
5 Antenna Interface
5.1. Main/Rx-diversity Antenna Interface
5.1.1. Pin Definition
5.1.2. Operating Frequency
5.1.3. Reference Design
5.2. GNSS Antenna Interface
5.3. Antenna Installation
5.3.1. Antenna Requirement
5.3.2. Install the Antenna with RF Connector
6 Electrical, Reliability and Radio Characteristics
6.1. Absolute Maximum Ratings
6.2. Power Supply Ratings
6.3. Operating Temperature
6.4. Current Consumption
6.5. RF Output Power
6.6. RF Receiving Sensitivity
6.7. Electrostatic Discharge
7 Mechanical Dimensions
7.1. Mechanical Dimensions of the Module
7.2. Footprint of Recommendation
7.3. Top View of the Module
7.4. Bottom View of the Module
8 Storage and Manufacturing
8.1. Storage
8.2. Manufacturing and Welding
8.3. Packaging
9 Appendix A Reference
10 Appendix B GPRS Coding Scheme
11 Appendix C GPRS Multi-slot Class
12 Appendix D EDGE Modulation and Coding Scheme
EC20 Hardware Design
LTE Module Series
Rev. EC20_Hardware_Design_V1.1
Date: 2015-08-14
www.quectel.com
LTE Module Series
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
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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
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ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR
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COPYRIGHT
THIS INFORMATION CONTAINED HERE IS PROPRIETARY TECHNICAL INFORMATION OF
QUECTEL CO., LTD. TRANSMITTABLE, REPRODUCTION, DISSEMINATION AND EDITING OF THIS
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OR DESIGN.
Copyright © Quectel Wireless Solutions Co., Ltd. 2015. All rights reserved.
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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. Added UART interface pins
2. Added FOTA upgrade mode
3. Added EC20-CE info
4. Updated module dimension information
5. Updated EC20-C bands
6. Updated functional diagram
7. Updated power supply reference circuit
8. Updated description of UART interface
9. Updated current consumption
10. Updated GNSS sensitivity
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EC20 Hardware Design
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 5
Figure Index ................................................................................................................................................. 6
1
Introduction .......................................................................................................................................... 7
1.1.
Safety Information...................................................................................................................... 8
2 Product Concept .................................................................................................................................. 9
2.1. General Description ................................................................................................................... 9
2.2.
2.3.
2.4.
Key Features ........................................................................................................................... 10
Functional Diagram ................................................................................................................. 12
Evaluation Board ..................................................................................................................... 13
3 Application Interface ......................................................................................................................... 14
3.1. General Description ................................................................................................................. 14
3.2.
3.3.
Pin Assignment ........................................................................................................................ 15
Pin Description ......................................................................................................................... 16
3.4. Operating Modes ..................................................................................................................... 21
3.5.
Power Saving ........................................................................................................................... 22
3.5.1. Sleep Mode .................................................................................................................... 22
3.5.1.1. UART Application ................................................................................................. 22
3.5.1.2. USB Application with USB Remote Wakeup Function ........................................ 23
3.5.1.3. USB Application with USB Suspend/Resume and RI Function .......................... 23
3.5.1.4. USB Application without USB Suspend Function ................................................ 24
3.5.2. Airplane Mode ................................................................................................................ 25
3.6.
Power Supply ........................................................................................................................... 25
3.6.1. Power Supply Pins ......................................................................................................... 25
3.6.2. Decrease Voltage Drop .................................................................................................. 26
3.6.3. Reference Design for Power Supply .............................................................................. 27
3.6.4. Monitor the Power Supply .............................................................................................. 27
3.7.
Turn on and off Scenarios ....................................................................................................... 28
3.7.1. Turn on Module Using the PWRKEY ............................................................................. 28
3.7.2. Turn off Module .............................................................................................................. 29
3.7.2.1. Turn off Module Using the PWRKEY Pin ............................................................. 30
3.7.2.2. Turn off Module Using AT Command ................................................................... 30
3.8. Reset the Module..................................................................................................................... 30
3.9. USIM Card Interface ................................................................................................................ 32
3.10. USB Interface .......................................................................................................................... 33
3.11. UART Interface ........................................................................................................................ 35
3.12. PCM and I2C Interface ............................................................................................................ 37
3.13. ADC Function .......................................................................................................................... 39
3.14. Network Status Indication ........................................................................................................ 40
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3.15. Operating Status Indication ..................................................................................................... 41
3.16. Behavior of the RI .................................................................................................................... 42
4 GNSS Receiver ................................................................................................................................... 43
4.1. General Description ................................................................................................................. 43
4.2. GNSS Performance ................................................................................................................. 44
4.3.
Layout Guideline ...................................................................................................................... 45
5 Antenna Interface ............................................................................................................................... 46
5.1. Main/Rx-diversity Antenna Interface ........................................................................................ 46
5.1.1. Pin Definition .................................................................................................................. 46
5.1.2. Operating Frequency ..................................................................................................... 46
5.1.3. Reference Design .......................................................................................................... 47
5.2. GNSS Antenna Interface ......................................................................................................... 48
5.3.
Antenna Installation ................................................................................................................. 49
5.3.1. Antenna Requirement .................................................................................................... 49
5.3.2.
Install the Antenna with RF Connector .......................................................................... 50
6 Electrical, Reliability and Radio Characteristics ............................................................................ 52
6.1.
6.2.
Absolute Maximum Ratings ..................................................................................................... 52
Power Supply Ratings ............................................................................................................. 53
6.3. Operating Temperature ............................................................................................................ 53
6.4. Current Consumption .............................................................................................................. 54
6.5. RF Output Power ..................................................................................................................... 60
6.6. RF Receiving Sensitivity .......................................................................................................... 60
6.7.
Electrostatic Discharge ............................................................................................................ 62
7 Mechanical Dimensions .................................................................................................................... 63
7.1. Mechanical Dimensions of the Module.................................................................................... 63
7.2.
7.3.
7.4.
Footprint of Recommendation ................................................................................................. 65
Top View of the Module ........................................................................................................... 68
Bottom View of the Module ...................................................................................................... 68
8 Storage and Manufacturing .............................................................................................................. 69
8.1.
Storage..................................................................................................................................... 69
8.2. Manufacturing and Welding ..................................................................................................... 69
8.3.
Packaging ................................................................................................................................ 70
9 Appendix A Reference ....................................................................................................................... 72
10 Appendix B GPRS Coding Scheme ................................................................................................. 76
11 Appendix C GPRS Multi-slot Class .................................................................................................. 77
12 Appendix D EDGE Modulation and Coding Scheme ..................................................................... 78
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Table Index
TABLE 1: EC20 SERIES FREQUENCY BANDS ................................................................................................ 9
TABLE 2: EC20 KEY FEATURES ..................................................................................................................... 10
TABLE 3: IO PARAMETERS DEFINITION ........................................................................................................ 16
TABLE 4: PIN DESCRIPTION ........................................................................................................................... 16
TABLE 5: OVERVIEW OF OPERATING MODES ............................................................................................. 21
TABLE 6: VBAT AND GND PINS ....................................................................................................................... 26
TABLE 7: PWRKEY PIN DESCRIPTION .......................................................................................................... 28
TABLE 8: RESET_N PIN DESCRIPTION ......................................................................................................... 30
TABLE 9: PIN DEFINITION OF THE USIM INTERFACE ................................................................................. 32
TABLE 10: USB PIN DESCRIPTION ................................................................................................................ 33
TABLE 11: PIN DEFINITION OF THE UART INTERFACE ............................................................................... 35
TABLE 12: PIN DEFINITION OF THE DEBUG UART INTERFACE ................................................................. 35
TABLE 13: LOGIC LEVELS OF DIGITAL I/O .................................................................................................... 36
TABLE 14: PIN DEFINITION OF PCM AND I2C INTERFACE .......................................................................... 38
TABLE 15: PIN DEFINITION OF THE ADC ...................................................................................................... 40
TABLE 16: CHARACTERISTIC OF THE ADC .................................................................................................. 40
TABLE 17: PIN DEFINITION OF NETWORK INDICATOR ............................................................................... 40
TABLE 18: WORKING STATE OF THE NETWORK INDICATOR..................................................................... 41
TABLE 19: PIN DEFINITION OF STATUS ........................................................................................................ 41
TABLE 20: BEHAVIOR OF THE RI ................................................................................................................... 42
TABLE 21: GNSS PERFORMANCE ................................................................................................................. 44
TABLE 22: PIN DEFINITION OF THE RF ANTENNA ....................................................................................... 46
TABLE 23: THE MODULE OPERATING FREQUENCIES ................................................................................ 46
TABLE 24: PIN DEFINITION OF GNSS ANTENNA .......................................................................................... 48
TABLE 25: GNSS FREQUENCY ....................................................................................................................... 48
TABLE 26: ANTENNA REQUIREMENTS .......................................................................................................... 49
TABLE 27: ABSOLUTE MAXIMUM RATINGS .................................................................................................. 52
TABLE 28: THE MODULE POWER SUPPLY RATINGS .................................................................................. 53
TABLE 29: OPERATING TEMPERATURE ........................................................................................................ 53
TABLE 30: EC20-A CURRENT CONSUMPTION ............................................................................................. 54
TABLE 31: EC20-C CURRENT CONSUMPTION ............................................................................................. 55
TABLE 32: EC20-E CURRENT CONSUMPTION ............................................................................................. 57
TABLE 33: CONDUCTED RF OUTPUT POWER ............................................................................................. 60
TABLE 34: EC20-A CONDUCTED RF RECEIVING SENSITIVITY .................................................................. 60
TABLE 35: EC20-C CONDUCTED RF RECEIVING SENSITIVITY .................................................................. 61
TABLE 36: EC20-E CONDUCTED RF RECEIVING SENSITIVITY .................................................................. 61
TABLE 37: ELECTROSTATICS DISCHARGE CHARACTERISTICS ............................................................... 62
TABLE 38: RELATED DOCUMENTS ................................................................................................................ 72
TABLE 39: TERMS AND ABBREVIATIONS ...................................................................................................... 72
TABLE 40: DESCRIPTION OF DIFFERENT CODING SCHEMES .................................................................. 76
TABLE 41: GPRS MULTI-SLOT CLASSES ...................................................................................................... 77
TABLE 42: EDGE MODULATION AND CODING SCHEME ............................................................................. 78
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Figure Index
FIGURE 1: FUNCTIONAL DIAGRAM ............................................................................................................... 13
FIGURE 2: PIN ASSIGNMENT (TOP VIEW)..................................................................................................... 15
FIGURE 3: UART SLEEP APPLICATION ......................................................................................................... 22
FIGURE 4: SLEEP APPLICATION WITH USB REMOTE WAKEUP ................................................................ 23
FIGURE 5: SLEEP APPLICATION WITH RI ..................................................................................................... 24
FIGURE 6: SLEEP APPLICATION WITHOUT SUSPEND FUNCTION ............................................................ 24
FIGURE 7: POWER SUPPLY LIMITS DURING TRANSMIT BURST ............................................................... 26
FIGURE 8: STAR STRUCTURE OF THE POWER SUPPLY............................................................................ 27
FIGURE 9: REFERENCE CIRCUIT OF POWER SUPPLY .............................................................................. 27
FIGURE 10: TURN ON THE MODULE USING DRIVING CIRCUIT ................................................................. 28
FIGURE 11: TURN ON THE MODULE USING KEYSTROKE .......................................................................... 29
FIGURE 12: TIMING OF TURNING ON MODULE ........................................................................................... 29
FIGURE 13: TIMING OF TURNING OFF MODULE ......................................................................................... 30
FIGURE 14: REFERENCE CIRCUIT OF RESET_N BY USING DRIVING CIRCUIT ...................................... 31
FIGURE 15: REFERENCE CIRCUIT OF RESET_N BY USING BUTTON ...................................................... 31
FIGURE 16: TIMING OF RESETTING MODULE ............................................................................................. 31
FIGURE 17: REFERENCE CIRCUIT OF THE 6 PIN USIM CARD ................................................................... 32
FIGURE 18: TEST POINTS FOR FIRMWARE UPGRADE .............................................................................. 34
FIGURE 19: REFERENCE CIRCUIT WITH TRANSLATOR CHIP ................................................................... 36
FIGURE 20: REFERENCE CIRCUIT WITH TRANSISTOR CIRCUIT .............................................................. 37
FIGURE 21: PRIMARY MODE TIMING ............................................................................................................ 38
FIGURE 22: AUXILIARY MODE TIMING .......................................................................................................... 38
FIGURE 23: REFERENCE CIRCUIT OF PCM APPLICATION WITH AUDIO CODEC .................................... 39
FIGURE 24: REFERENCE CIRCUIT OF THE NETWORK INDICATOR .......................................................... 41
FIGURE 25: REFERENCE CIRCUIT OF THE STATUS ................................................................................... 42
FIGURE 26: REFERENCE CIRCUIT OF ANTENNA INTERFACE ................................................................... 47
FIGURE 27: REFERENCE CIRCUIT OF GNSS ANTENNA ............................................................................. 48
FIGURE 28: DIMENSIONS OF THE UF.L-R-SMT CONNECTOR (UNIT: MM) ................................................ 50
FIGURE 29: MECHANICALS OF UF.L-LP CONNECTORS ............................................................................. 50
FIGURE 30: SPACE FACTOR OF MATED CONNECTOR (UNIT: MM) ........................................................... 51
FIGURE 31: MODULE TOP AND SIDE DIMENSIONS ..................................................................................... 63
FIGURE 32: MODULE BOTTOM DIMENSIONS (BOTTOM VIEW) ................................................................. 64
FIGURE 33: BOTTOM PADS DIMENSIONS (BOTTOM VIEW) ....................................................................... 64
FIGURE 34: RECOMMENDED FOOTPRINT (TOP VIEW) .............................................................................. 65
FIGURE 35: RECOMMENDED STENCIL ......................................................................................................... 66
FIGURE 36: RECOMMENDED FOOTPRINT WITH PINS 117~140 ................................................................ 67
FIGURE 37: TOP VIEW OF THE MODULE ...................................................................................................... 68
FIGURE 38: BOTTOM VIEW OF THE MODULE .............................................................................................. 68
FIGURE 39: LIQUIDS TEMPERATURE ............................................................................................................ 70
FIGURE 40: CARRIER TAPE ............................................................................................................................ 71
EC20_Hardware_Design Confidential / Released 6 / 78
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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.
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