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EG25-G
Quectel EG25-G User Manual
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LTE
Module
Series
EG25-G
Hardware
Design
EG25
-
G_Har
dware_
Design
46
/
100
VCCA
VCCB
OE
A1
A2
A3
A4
A5
A6
A7
A8
GND
B1
B2
B3
B4
B5
B6
B7
B8
VDD_EXT
RI
DCD
RTS
RXD
DTR
CTS
TXD
51K
51K
0.1uF
0.1uF
RI_MCU
DCD_MCU
RTS_MCU
RXD_MCU
DTR_MCU
CTS_MCU
TXD_MCU
VDD_MCU
Translator
Figure
20
: Reference
Circuit with Tr
anslator Chi
p
Please visit
http://w
ww
.ti.com
for
more in
formation.
Another
example
with
tra
nsistor
translation
circuit
is
shown
as
below
.
The
circuit
design
of
dotted
lin
e
section
can
refer
to
the
d
esign
of
solid
line
section,
in
terms
of
both
m
odu
le
’s
input
and
output
circuit
designs, but p
lease pay
attention to the
direction o
f connection.
MCU/ARM
TXD
RXD
VDD_EXT
10K
VCC_MCU
4.7K
10K
VDD_EXT
TXD
RXD
RTS
CTS
DTR
RI
RTS
CTS
GND
GPIO
DCD
Module
GPIO
EINT
VDD_EXT
4.7K
GND
1nF
1nF
Figure
21
:
Refere
nce Circuit
with Tran
sistor Circuit
Transistor cir
cuit solut
ion is not
suitable for appl
ications w
ith high baud r
ates exceedin
g 460Kbps.
NOTE
46
48
Table of Contents
About the Document
3
Table of Contents
4
Contents
4
Introduction
10
Safety Information
11
Product Concept
12
General Description
12
Key Features
13
Functional Diagram
15
Evaluation Board
16
Application Interfaces
17
General Description
17
Pin Assignment
18
Pin Description
19
Operating Modes
30
Power Saving
31
Sleep Mode
31
UART Application
31
USB Application with USB Remote Wakeup Function
32
USB Application with USB Suspension/Resume and RI Function
32
USB Application Without USB Suspension Function
33
Airplane Mode
34
Power Supply
34
Power Supply Pins
34
Decrease Voltage Drop
35
Reference Design for Power Supply
36
Monitor the Power Supply
37
Power-On and off Scenarios
37
Turn on Module Using the PWRKEY
37
Figure 11: Turn on the Module by Using Keystroke
38
Turn off Module
39
Turn off Module Using the PWRKEY Pin
39
Turn off Module Using at Command
39
Reset the Module
40
U)SIM Interface
41
Table 9: Pin Definition of (U)Sim Interface
42
Figure 18: Reference Circuit of (U)Sim Interface with a 6-Pin (U)Sim Card Connector
43
USB Interface
44
UART Interfaces
45
Table 11: Pin Definition of Main Uart Interface
46
Figure 20: Reference Circuit with Translator Chip
47
PCM and I2C Interfaces
48
Table 14: Pin Definition of Pcm and I2C Interfaces
49
SD Card Interface
50
Figure 25: Reference Circuit of Sd Card
51
Wireless Connectivity Interfaces
52
WLAN Interface
54
BT Interface
55
SGMII Interface
55
Table 17: Pin Definition of Sgmii Interface
56
ADC Interfaces
57
Network Status Indication
58
Status
59
Behaviors of RI
60
USB_BOOT Interface
61
GNSS Receiver
62
General Description
62
GNSS Performance
62
Layout Guidelines
63
Antenna Interfaces
64
Main/Rx-Diversity Antenna Interfaces
64
Pin Definition
64
Operating Frequency
64
Reference Design of RF Antenna Interface
66
Reference Design of RF Layout
66
Figure 33: Microstrip Design on a 2-Layer Pcb
67
GNSS Antenna Interface
68
Antenna Installation
69
Antenna Requirement
69
Recommended RF Connector for Antenna Installation
70
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 Characteristics
73
Absolute Maximum Ratings
73
Power Supply Ratings
74
Operation and Storage Temperatures
74
Current Consumption
75
Table 35: Gnss Current Consumption of Eg25-G Module
79
RF Output Power
80
RF Receiving Sensitivity
80
Electrostatic Discharge
82
Thermal Consideration
82
Figure 41: Referenced Heatsink Design (Heatsink at the Top of the Module)
83
Mechanical Dimensions
85
Mechanical Dimensions of the Module
85
Figure 44: Module Bottom Dimensions (Bottom View)
86
Recommended Footprint
87
Design Effect Drawings of the Module
88
Storage, Manufacturing and Packaging
89
Storage
89
Manufacturing and Soldering
90
Packaging
91
Figure 49: Tape and Reel Specifications
92
Appendix A References
93
Appendix B GPRS Coding Schemes
97
Appendix C GPRS Multi-Slot Classes
98
Appendix D EDGE Modulation and Coding Schemes
100
IC & FCC Requirement
101
4
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Quectel EG25-G Specifications
General
Brand
Quectel
Model
EG25-G
Category
GSM/GPRS Modules
Language
English
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