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Quectel M35 User Manual
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GSM/GPRS
Module
Serie
s
M35
User
M
anual
M35_User_
M
anual
Confidential
/ Released
19
/
85
3.1.2.
Pin Description
Table 3
:
Pin Description
Power Supply
PIN NAME
PIN
NO.
I/O
DESCRIP
TION
DC
CHARACT
ER
ISTI
CS
COMMENT
VBA
T
33,
34
I
Main power
supply of
module:
VBA
T=3.3
V~4.6V
Vmax=4.6V
Vmin=3.3
V
Vnorm=4.
0V
Make sure th
at
supply suf
ficient
current in a
transmittin
g burst
typically
rises to
1.6A.
VR
TC
32
I/O
Power
supply
for
RT
C
when
VBA
T
is
not
supplie
d
for the syst
em
.
Charging for
backup
battery
or golden capacitor
when the V
BA
T
is applied.
VImax=3.3
V
VImin=1.5V
VInorm=2.8
V
VOmax=3V
VOmin=2V
VOnorm=2.8
V
Iout(max)=2
mA
Iin
≈
10uA
If unused,
k
eep
this pin open.
VDD_
EXT
19
O
Supply 2.8V
voltage
for
external circ
ui
t.
Vmax=2.9V
Vmin=2.7
V
Vnorm=2.8V
Imax=20m
A
1.
If
unused,
keep
this pin open.
2. Recommen
d to
add a 2.2~4.7
uF
bypass cap
acitor
,
when using t
his
pin for powe
r
supply
.
GND
35,
36
,3
7,
38
,
40
Ground
T
urn on/off
PIN NAM
E
PIN
NO.
I/O
DESCRIP
TION
DC
CHARACT
ER
ISTI
CS
COMMENT
PWRKEY
10
I
Power
on/of
f
key
.
PWRKEY
should
be
pulled
down
for
a
m
oment
to
turn
on or turn
off the
syste
m
.
VILmax=
0.1×
VBA
T
VIHmin=
0.
6×
VBA
T
VImax=3.1
V
Emergency
Shutdown
19
21
Table of Contents
About the Document
3
Table of Contents
5
Contents
5
Introduction
11
Safety Information
12
Product Concept
13
General Description
13
Directives and Standards
13
FCC Radiation Exposure Statement
13
Key Features
14
Functional Diagram
16
Evaluation Board
17
Application Interface
18
Pin of Module
19
Pin Assignment
19
Pin Description
20
Operating Modes
24
Power Supply
26
Power Features of Module
26
Decrease Supply Voltage Drop
26
Reference Design for Power Supply
27
Monitor Power Supply
28
Power on and down Scenarios
28
Power on
28
Figure 7: Turn on the Module with a Button
29
Power down
30
Power down Module Using the PWRKEY Pin
30
Power down Module Using at Command
31
Over-Voltage or Under-Voltage Automatic Shutdown
31
Emergency Shutdown Using EMERG_OFF Pin
32
Restart
33
Power Saving
34
Minimum Functionality Mode
34
SLEEP Mode
35
Wake up Module from SLEEP Mode
35
Summary of State Transition
36
RTC Backup
36
M35_User_Manual
36
Figure 14: Vrtc Is Supplied by a Non-Chargeable Battery
37
Serial Interfaces
38
Table 7: Logic Levels of the Uart Interfaces
39
UART Port
40
The Features of UART Port
40
The Connection of UART
41
Figure 18: Reference Design for Uart Port
42
Firmware Upgrade
43
Debug Port
43
UART Application
44
Audio Interfaces
45
Table 10: Aout2 Output Characteristics
46
Decrease TDD Noise and Other Noise
47
Microphone Interfaces Design
47
Receiver Interface Design
48
Earphone Interface Design
48
Loud Speaker Interface Design
49
Audio Characteristics
49
PCM Interface
50
Configuration
51
Timing
51
Figure 28: Long Synchronization & Sign Extension Diagram
52
Reference Design
53
AT Command
53
SIM Card Interfaces
54
SIM Card Application
54
Table 17: Pin Definition of the Sim Interfaces
55
Figure 33: Reference Circuit for Sim1 Interface with 8-Pin Sim Card Holder
56
Figure 35: Reference Circuit for Sim2 Interface with the 6-Pin Sim Card Holder
57
Behaviors of the RI
58
Network Status Indication
59
Operating Status Indication
60
Figure 40: Reference Design for Status
61
Antenna Interface
62
RF Reference Design
62
RF Output Power
63
RF Receiving Sensitivity
63
Operating Frequencies
64
Antenna Requirement
64
RF Cable Soldering
65
Electrical, Reliability and Radio Characteristics
66
Absolute Maximum Ratings
66
Operating Temperature
66
Power Supply Ratings
67
Current Consumption
68
Electro-Static Discharge
69
Table 31: the Esd Endurance (Temperature: 25º C, Humidity: 45%)
70
Mechanical Dimensions
71
Mechanical Dimensions of Module
71
Figure 44: M35 Module Bottom Dimensions (Unit: MM)
72
Recommended Footprint
73
Top View of the Module
74
Bottom View of the Module
74
Storage and Manufacturing
75
M35_User_Manual
75
Storage
75
Soldering
75
Packaging
76
Tape and Reel Packaging
76
Figure 49: Tape and Reel Specification
77
Table 32: Reel Packing
78
Appendix A Reference
79
Table 34: Terms and Abbreviations
80
Appendix B GPRS Coding Scheme
84
Figure 52: Radio Block Structure of Cs-4
85
Appendix C GPRS Multi-Slot Class
86
M35_User_Manual
86
4
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Quectel M35 Specifications
General
Brand
Quectel
Model
M35
Category
Control Unit
Language
English
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