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EG91-EX
Quectel EG91-EX User Manual
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LTE Standard Module Series
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10
Appendix B GPRS Coding Schemes
Table 54: Description of Different Coding Schemes
Scheme
CS-1 CS-2 CS-3 CS-4
Code Rate
1/2 2/3 3/4 1
USF
3 3 3 3
Pre-coded USF
3
6
6
12
Radio Block excl.USF and BCS
181
268
312
428
BCS
40 16 16 16
Ta
i
l
4
4
4
-
Coded Bit
s
456 588 676 456
Punctured Bit
s
0 132
220
-
Dat
a Rat
e Kb/s
9.05
13.4
15.6
21.4
105
107
Table of Contents
About the Document
3
Contents
6
Table of Contents
6
1 Introduction
12
Safety Information
15
2 Product Concept
16
General Description
16
Key Features
17
Functional Diagram
20
Evaluation Board
21
3 Application Interfaces
22
General Description
22
Pin Assignment
23
Pin Description
24
Operating Modes
31
Power Saving
32
Sleep Mode
32
UART Application
32
USB Application with USB Remote Wakeup Function
33
USB Application with USB Suspend/Resume and RI Function
33
USB Application Without USB Suspend Function
34
Airplane Mode
35
Power Supply
35
Power Supply Pins
35
Decrease Voltage Drop
36
Reference Design for Power Supply
37
Monitor the Power Supply
37
Power-On/Off Scenarios
38
Turn on Module Using the PWRKEY
38
Turn off Module
40
Turn off Module Using the PWRKEY Pin
40
Turn off Module Using at Command
40
Reset the Module
41
U)SIM Interfaces
42
USB Interface
45
UART Interfaces
46
PCM and I2C Interfaces
49
SPI Interface
52
Network Status Indication
53
Status
54
ADC Interface
54
Behaviors of RI
55
USB_BOOT Interface
56
4 GNSS Receiver
58
General Description
58
GNSS Performance
58
Layout Guidelines
59
5 Antenna Interfaces
60
Main/Rx-Diversity Antenna Interfaces
60
Pin Definition
60
Operating Frequency
60
Reference Design of RF Antenna Interface
61
Reference Design of RF Layout
62
GNSS Antenna Interface
64
Antenna Installation
65
Antenna Requirement
65
Recommended RF Connector for Antenna Installation
66
6 Electrical, Reliability and Radio Characteristics
68
Absolute Maximum Ratings
68
Power Supply Ratings
68
Operation and Storage Temperatures
69
Current Consumption
70
RF Output Power
82
RF Receiving Sensitivity
83
Electrostatic Discharge
88
Thermal Consideration
88
7 Mechanical Dimensions
91
Mechanical Dimensions of the Module
91
Recommended Footprint
94
Top and Bottom Views of the Module
95
8 Storage, Manufacturing and Packaging
97
Storage
97
Manufacturing and Soldering
98
Packaging
99
9 Appendix A References
102
10 Appendix B GPRS Coding Schemes
106
11 Appendix C GPRS Multi-Slot Classes
107
12 Appendix D EDGE Modulation and Coding Schemes
109
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Quectel EG91-EX Specifications
General
Brand
Quectel
Model
EG91-EX
Category
Control Unit
Language
English
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