Quectel EC21-CT Manuals

Manuals and User Guides for Quectel EC21-CT. We have 1 Quectel EC21-CT manual available for free PDF download: Hardware Design

Quectel EC21-CT Hardware Design (95 pages)

LTE Module Series

Brand: Quectel | Category: Control Unit | Size: 2.6 MB

About the Document
3
Updated Function Diagram in Figure
3
4. Added BT Interface in Chapter 3.18.2
4
Table of Contents
5
Contents
5
Introduction
11
Safety Information
12
Product Concept
13
General Description
13
Key Features
14
Functional Diagram
17
Evaluation Board
17
Application Interfaces
18
General Description
18
Pin Assignment
19
Pin Description
20
Operating Modes
29
Power Saving
29
Sleep Mode
29
UART Application
29
USB Application with USB Remote Wakeup Function
30
USB Application with USB Suspend/Resume and RI Function
31
USB Application Without USB Suspend Function
32
Airplane Mode
33
Power Supply
33
Power Supply Pins
33
Decrease Voltage Drop
34
Reference Design for Power Supply
35
Monitor the Power Supply
36
Turn on and off Scenarios
36
Turn on Module Using the PWRKEY
36
Figure 11: Turn on the Module Using Keystroke
37
Turn off Module
38
Turn off Module Using the PWRKEY Pin
38
Turn off Module Using at Command
38
Reset the Module
39
USIM Card Interface
40
Figure 17: Reference Circuit of Usim Card Interface with an 8-Pin Usim Card Connector
41
USB Interface
42
Figure 19: Reference Circuit of Usb Application
43
UART Interfaces
44
Table 13: Logic Levels of Digital I/O
45
PCM and I2C Interfaces
46
Table 14: Pin Definition of Pcm and I2C Interfaces
47
Figure 24: Reference Circuit of Pcm Application with Audio Codec
48
ADC Function
49
Network Status Indication
50
Status
51
Behavior of the RI
52
SGMII Interface
52
Table 21: Pin Definition of the Sgmii Interface
53
Figure 28: Reference Circuit of Sgmii Interface with Phy Ar8033 Application
54
Wireless Connectivity Interfaces
55
Figure 29: Reference Circuit of Wireless Connectivity Interfaces with Fc20 Module
56
WLAN Interface
57
BT Interface
57
USB_BOOT Interface
58
GNSS Receiver
59
General Description
59
GNSS Performance
59
Layout Guidelines
60
Antenna Interfaces
61
Main/Rx-Diversity Antenna Interface
61
Pin Definition
61
Operating Frequency
61
Reference Design of RF Antenna Interface
62
Reference Design of RF Layout
63
Figure 34: Coplanar Waveguide Line Design on a 4-Layer Pcb (Layer 3 as Reference Ground)
64
GNSS Antenna Interface
65
Antenna Installation
66
Antenna Requirement
66
Recommended RF Connector for Antenna Installation
67
Figure 39: Space Factor of Mated Connector (Unit: MM)
68
Electrical, Reliability and Radio Characteristics
69
Absolute Maximum Ratings
69
Power Supply Ratings
69
Operating Temperature
70
Current Consumption
71
Table 34: Ec21-Aut Current Consumption
72
Table 35: Ec21-E Current Consumption
73
Table 36: Ec21-Kl Current Consumption
74
Table 37: Ec21-V Current Consumption
75
Table 39: Gnss Current Consumption of Ec21 Series Module
76
RF Output Power
77
RF Receiving Sensitivity
77
Table 42: Ec21-A Conducted Rf Receiving Sensitivity
78
Table 45: Ec21-Autl Conducted Rf Receiving Sensitivity
79
Table 48: Ec21-J Conducted Rf Receiving Sensitivity
80
Electrostatic Discharge
81
Mechanical Dimensions
82
Mechanical Dimensions of the Module
82
Figure 41: Module Bottom Dimensions (Bottom View)
83
Recommended Footprint
84
Design Effect Drawings of the Module
85
Storage, Manufacturing and Packaging
86
Storage
86
Manufacturing and Soldering
87
Packaging
88
Appendix A References
89
Appendix B GPRS Coding Schemes
93
Appendix C GPRS Multi-Slot Classes
94
Appendix D EDGE Modulation and Coding Schemes
95

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