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M20
Quectel M20 Hardware Design
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M20_HD_V1.01
-
8
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0 Revision history
Revision
Date
Author
Description of change
1.00 2009-09-8
Y
ong
AN
Initial
1.01
2009-09-17
Y
ong
AN
Add SIM_GND Pin name descriptions
Modify Figure 33 a
nd Figure 34 about SI
M card circuit
Add current consum
ption of 2 Rx and 3
Tx in data mode
Modify ordering inform
ation content in Chapter 6
Quectel
8
10
Table of Contents
Default Chapter
3
Table of Contents
3
Revision History
9
1 Introduction
10
Related Documents
10
Terms and Abbreviations
11
Safety Caution
13
2 Product Concept
15
Key Features
15
Functional Diagram
17
Evaluation Board
18
3 Application Interface
19
Pin Description
19
Operating Modes
23
Power Supply
24
Power Supply Pins
26
Minimizing Power Losses
26
Monitoring Power Supply
27
Power up and Power down Scenarios
27
Turn on
27
Turn off
30
Restart Module Using the PWRKEY Pin
33
Charging Interface
34
Battery Pack Characteristics
35
Recommended Battery Pack
36
Implemented Charging Technique
37
Operating Modes During Charging
39
Charger Requirements
40
Power Saving
41
Minimum Functionality Mode
41
SLEEP Mode
41
Wake up Module from the SLEEP Mode
42
Summary of State Transition (Except SLEEP Mode)
42
RTC Backup
42
Serial Interface
44
Function of Serial Port 0 & Serial Port 1
46
Software Upgrade and Software Debug
47
Audio Interfaces
49
Microphone Interface Configuration
50
Speaker Interface Configuration
52
Earphone Interface Configuration
54
DAI Interface（Optional
55
SIM Card Interface
56
SIM Card Application
56
Design Considerations for SIM Card Holder
58
Adc
60
Behavior of the Pin RI0
60
Network Status Indication
62
4 Antenna Interface
63
Antenna Installation
63
Antenna Connector
63
Antenna Pad
64
RF Output Power
65
RF Receiving Sensitivity
65
Operating Frequency
65
5 Electrical, Reliability and Radio Characteristics
66
PIN Assignment of the Module
66
Absolute Maximum Ratings
67
Operating Temperatures
67
Power Supply Ratings
67
Current Consumption
68
Electro-Static Discharge
71
6 Product Information
72
7 Mechanical Dimension
73
Mechanical Dimensions of Module
73
Footprint of Recommendation
74
Mounting Module in the Host
74
Board-To-Board Connector
75
Mechanical Dimensions of the DF12 Header (Without Metal Fitting)
75
Physical Photo of the DF12 Connector
76
RF Connector
77
Physical Photo of the UF.L-R-SMT Connector
77
Matching Connector on the Application Side of M20
77
Space Factor of Mated Connector
78
Top View of the Module
79
Bottom View of the Module
79
Appendix A: GPRS Coding Schemes
80
Appendix B: GPRS Multi-Slot Classes
81
Other manuals for Quectel M20
User Guide
29 pages
4
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Quectel M20 Specifications
General
Brand
Quectel
Model
M20
Category
GSM/GPRS Modules
Language
English
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