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Quectel EG21-G User Manual
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LTE
Module
Series
EG21-G
Hardware
Design
EG21
-
G_Hardware_Design
80
/
100
7.3.
Design Effect Drawings of the Module
Figure
44
: Top View of the Module
Figure
45
: Bottom View of the Module
These
are
design
effect
drawings
of
EG21-G
module.
For
more
accurate
pictures,
please
refer
to
the
module that you get from Quectel.
NOTE
80
82
Table of Contents
About the Document
3
Table of Contents
4
Contents
4
Introduction
10
Safety Information
11
Product Concept
12
General Description
12
Key Features
13
Functional Diagram
15
Evaluation Board
16
Application Interfaces
17
General Description
17
Pin Assignment
18
Pin Description
19
Operating Modes
27
Power Saving
28
Sleep Mode
28
UART Application
28
USB Application with USB Remote Wakeup Function
29
USB Application with USB Suspension/Resume and RI Function
30
USB Application Without USB Suspension Function
31
Airplane Mode
31
Power Supply
32
Power Supply Pins
32
Decrease Voltage Drop
33
Reference Design for Power Supply
34
Monitor the Power Supply
34
Power-On and off Scenarios
35
Turn on Module Using the PWRKEY
35
Turn off Module
36
Turn off Module Using the PWRKEY Pin
37
Turn off Module Using at Command
37
Reset the Module
37
U)SIM Interface
39
USB Interface
41
UART Interfaces
43
PCM and I2C Interfaces
45
SD Card Interface
47
ADC Interfaces
49
Network Status Indication
50
Status
51
Behaviors of RI
52
USB_BOOT Interface
52
GNSS Receiver
55
General Description
55
GNSS Performance
55
Layout Guidelines
56
Antenna Interfaces
57
Main/Rx-Diversity Antenna Interfaces
57
Pin Definition
57
Operating Frequency
57
Reference Design of RF Antenna Interface
59
Reference Design of RF Layout
59
GNSS Antenna Interface
61
Antenna Installation
62
Antenna Requirement
62
Recommended RF Connector for Antenna Installation
63
Electrical, Reliability and Radio Characteristics
66
Absolute Maximum Ratings
66
Power Supply Ratings
67
Operation and Storage Temperatures
67
Current Consumption
68
RF Output Power
73
RF Receiving Sensitivity
73
Electrostatic Discharge
75
Thermal Consideration
75
Mechanical Dimensions
78
Mechanical Dimensions of the Module
78
Recommended Footprint
80
Design Effect Drawings of the Module
81
Storage, Manufacturing and Packaging
82
Storage
82
Manufacturing and Soldering
83
Packaging
84
Appendix A References
86
Appendix B GPRS Coding Schemes
90
Appendix C GPRS Multi-Slot Classes
91
Appendix D EDGE Modulation and Coding Schemes
93
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Reference Design
23 pages
4
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Quectel EG21-G Specifications
General
Brand
Quectel
Model
EG21-G
Category
Wireless modules
Language
English
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