Quectel EG25-G - Page 7

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LTE Module Series

EG25-G Hardware Design

EG25-G_Hardware_Design 6 / 100

TABLE 42: DESCRIPTION OF DIFFERENT CODING SCHEMES .................................................................. 96

TABLE 43: GPRS MULTI-SLOT CLASSES ...................................................................................................... 97

TABLE 44: EDGE MODULATION AND CODING SCHEMES ........................................................................... 99

Main Page

About the Document3
Table of Contents4
Contents4
Introduction10
Safety Information11
Product Concept12
General Description12
Key Features13
Functional Diagram15
Evaluation Board16
Application Interfaces17
General Description17
Pin Assignment18
Pin Description19
Operating Modes30
Power Saving31
Sleep Mode31
UART Application31
USB Application with USB Remote Wakeup Function32
USB Application with USB Suspension/Resume and RI Function32
USB Application Without USB Suspension Function33
Airplane Mode34
Power Supply34
Power Supply Pins34
Decrease Voltage Drop35
Reference Design for Power Supply36
Monitor the Power Supply37
Power-On and off Scenarios37
Turn on Module Using the PWRKEY37
Figure 11: Turn on the Module by Using Keystroke38
Turn off Module39
Turn off Module Using the PWRKEY Pin39
Turn off Module Using at Command39
Reset the Module40
U)SIM Interface41
Table 9: Pin Definition of (U)Sim Interface42
Figure 18: Reference Circuit of (U)Sim Interface with a 6-Pin (U)Sim Card Connector43
USB Interface44
UART Interfaces45
Table 11: Pin Definition of Main Uart Interface46
Figure 20: Reference Circuit with Translator Chip47
PCM and I2C Interfaces48
Table 14: Pin Definition of Pcm and I2C Interfaces49
SD Card Interface50
Figure 25: Reference Circuit of Sd Card51
Wireless Connectivity Interfaces52
WLAN Interface54
BT Interface55
SGMII Interface55
Table 17: Pin Definition of Sgmii Interface56
ADC Interfaces57
Network Status Indication58
Status59
Behaviors of RI60
USB_BOOT Interface61
GNSS Receiver62
General Description62
GNSS Performance62
Layout Guidelines63
Antenna Interfaces64
Main/Rx-Diversity Antenna Interfaces64
Pin Definition64
Operating Frequency64
Reference Design of RF Antenna Interface66
Reference Design of RF Layout66
Figure 33: Microstrip Design on a 2-Layer Pcb67
GNSS Antenna Interface68
Antenna Installation69
Antenna Requirement69
Recommended RF Connector for Antenna Installation70
Figure 38: Dimensions of the U.fl-R-Smt Connector (Unit: MM)71
Figure 40: Space Factor of Mated Connector (Unit: MM)72
Electrical, Reliability and Radio Characteristics73
Absolute Maximum Ratings73
Power Supply Ratings74
Operation and Storage Temperatures74
Current Consumption75
Table 35: Gnss Current Consumption of Eg25-G Module79
RF Output Power80
RF Receiving Sensitivity80
Electrostatic Discharge82
Thermal Consideration82
Figure 41: Referenced Heatsink Design (Heatsink at the Top of the Module)83
Mechanical Dimensions85
Mechanical Dimensions of the Module85
Figure 44: Module Bottom Dimensions (Bottom View)86
Recommended Footprint87
Design Effect Drawings of the Module88
Storage, Manufacturing and Packaging89
Storage89
Manufacturing and Soldering90
Packaging91
Figure 49: Tape and Reel Specifications92
Appendix A References93
Appendix B GPRS Coding Schemes97
Appendix C GPRS Multi-Slot Classes98
Appendix D EDGE Modulation and Coding Schemes100
IC & FCC Requirement101

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