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Quectel M20 User Manual
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M
2
0
E
V
B
U
s
e
r
G
u
i
d
e
3.3.
SIM card interface
Figure 6: SIM card interface
Table 5: Pins of SIM card interface
Pin
Signal
I/O
Description
1
SIM_DA
T
A
I/O
SIM card data I/O
2 GND
3 SIM_CLK
O
SIM
card
clock
4
SIM_RST
O
SIM card reset
5
SIM_VDD
O
SIM card power output
6 SIM_PRESENCE
I
SIM
card
detection
M20_EVB_UGD_V1.01
-
1
3
-
Quectel
13
15
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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