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M20
Quectel M20 User Manual
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M
2
0
E
V
B
U
s
e
r
G
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i
d
e
3.7.
Operating status LED
Figure 11: Operating st
atus indication LED
Table 9: Operating status indication L
ED
Part
Name
I/O
Description
L1
5V O
N/OFF indicator
O
On: VBA
T ON
Off: VBA
T OFF
L2 GSM_NET
status
indicator
O
Blinking dif
ferently
to indicate
various GSM networ
k status
M20_EVB_UGD_V1.01
-
1
7
-
Quectel
17
19
Table of Contents
Table of Contents
3
Revision History
6
Introduction
7
Related Documents
7
Safety Caution
7
EVB Kit Introduction
9
EVB Top and Bottom View
9
EVB Accessory
11
Interface Application
12
Power Interface
12
Audio Interface
13
SIM Card Interface
14
Antenna Interface
15
Serial Ports
16
Switches and Buttons
17
Operating Status LED
18
Test Points
19
J1 Test Points
20
J2 Test Points
21
J3 Test Points
22
VDD_EXT and VBAT Test Points
23
EVB and Accessories
24
Illustration
25
Power on Operations
25
Communicate with the Module
25
Firmware Upgrade
25
Turn off
26
Emergency off
26
PIN Assignment of B2B Connector
27
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Quectel M20 Specifications
General
Brand
Quectel
Model
M20
Category
GSM/GPRS Modules
Language
English
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