Cavli Wireless CQ20 Manuals

Manuals and User Guides for Cavli Wireless CQ20. We have 1 Cavli Wireless CQ20 manual available for free PDF download: Hardware Manual

Cavli Wireless CQ20 Hardware Manual

Cavli Wireless CQ20 Hardware Manual (65 pages)

LTE CAT 4 /2G Module

Brand: Cavli Wireless | Category: Control Unit | Size: 2 MB

Table of Contents

Table of Contents
3
Version History
7
Introduction
8
Module Overview
9
Module Introduction
9
Module Characteristics
10
Module Function
12
Figure 1 CQ20 Functional Block Diagram
13
Interface Application Description
14
Chapter Overview
14
Module Interface
15
CQ20 Pin Layout
15
CQ20 Pin Interface
15
Figure 2 CQ20 Module Interface Definition (Top View)
15
Absolute Maximum Ratings
17
Operating Conditions
17
Power Interface
29
Power Supply Design
29
Power Reference Circuit
30
Figure 3 VCC Power Supply
30
Switching Machine Reset Mode
31
Turn on Module
31
Figure 4 DC Switching Power Supply Reference Circuit
31
Reset Control
32
Figure 5 Power-On Reference Circuit
32
Figure 6 Reset Reference Circuit
32
USB Interface
33
Figure 7 USB Connection Design Circuit Diagram
33
UART Interface
34
Uart4 (at Uart)
34
UART 3 (User UART)
35
Debug UART
36
Serial Port Application Circuit
36
Figure 8 UART Serial Port Design
36
USIM Interface
37
Figure 9 Level Conversion Reference Circuit
37
USIM Card Reference Circuit
38
Figure 10 USIM Design Circuit Diagram
38
Status Indication Interface
39
PCM Digital Voice Interface
40
Figure 11 Circuit Diagram of WWAN_STATE Pin Indicator
40
Figure 12 PCM Short Frame Mode Timing Diagram
41
I2C Bus
42
Figure 13 PCM to Analog Voice Map
42
SDC Interface
43
Figure 14 I2C Interface Reference Circuit Diagram
43
Figure 15 SDC Interface Reference Circuit Diagram
44
Antenna
45
Figure 16 Main Antenna Matching Circuit
45
Figure 17 Diversity Antenna Matching Circuit
46
Figure 18 GNSS Active Antenna Matching Circuit
47
Figure 19 GNSS Antenna Matching Circuit
47
RF Trace Reference
48
Figure 20 Coplanar Antenna
48
Figure 21 the Complete Structure of the Two-Layer PCB Microstrip Line
48
Coexistence and Control Interface
49
Figure 22 the Complete Structure of the Multilayer PCB Strip Line
49
SGMII Interface
50
GNSS Interface
51
Figure 23 Ethernet (SGMII) Interface Reference Circuit Diagram
51
ADC Interface
52
JTAG Interface
52
GPIO Interface
52
WLAN and Bluetooth Applications Interfaces
53
Overall Technical Indicators
55
Chapter Overview
55
Working Frequency
55
Antenna Requirements
56
Interface Electrical Characteristics
58
Chapter Overview
58
Working Storage Temperature
58
Electrostatic Property
58
Module IO Level
59
Power Supply
60
Structural and Mechanical Properties
61
CQ20 Module Mechanical Size
61
Figure 24 Top View and Bottom View of the Module
61
Figure 25 CQ20 Module Dimensions
61
Figure 26 Pad Dimensions (Bottom View)
62
Appendix
63
Chapter Overview
63
Abbreviations
63
Safety and Precautions
65

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