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SIM800L
SimCom SIM800L User Manual
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Smart Machine Smart Deci
sion
SIM8
00
L
(M
T6261
)_
Hardw
are
Design
_V
1
.0
1
62
20
1
6-07-
07
US
SD
Unstructured
Supp
lement
ary Service Data
Phonebook
abbreviations
FD
SIM fi
x dialing phoneboo
k
LD
SIM last diali
ng phonebook (li
st of num
bers most re
cently dialed)
MC
Mobile Equipment list o
f unanswere
d MT calls (missed c
alls)
ON
SIM (or
ME) own num
ber
s (MSISDNs) list
RC
M
obile Equ
ipment list of rece
ived calls
SM
SIM
phonebook
NC
Not connect
SIMCOM
CONFIDENTIAL
FILE
61
63
Table of Contents
Default Chapter
3
Table of Contents
3
Version History
10
1 Introduction
11
2 SIM800L Overview
11
Sim800L
11
SIM800L Key Features
11
Operating Mode
13
Functional Diagram
14
3 Package Information
15
Pin out Diagram
15
Pin Description
15
Package Dimensions
18
Figure 4: Recommended Pcb Footprint Outline (Unit: MM)
19
4 Application Interface
20
Power Supply
20
Power Supply Pin
21
Monitoring Power Supply
22
Power On/Off Scenarios
22
Power on SIM800L
22
Power down SIM800L
23
Reset Function
24
Power Saving Mode
25
Minimum Functionality Mode
26
Sleep Mode 1 (AT+CSCLK=1)
26
Wake up SIM800L from Sleep Mode 1
26
Sleep Mode 2 (AT+CSCLK=2)
26
Wake up SIM800L from Sleep Mode 2
27
RTC Backup
27
Serial Port and USB Interface
28
Function of Serial Port
28
Serial Interfaces
29
Figure 21: Resistor Matching Circuit
30
Debug Interface
31
Software Upgrade
32
RI Behaviors
32
Audio Interfaces
33
Speaker Interfaces Configuration
34
Microphone Interfaces Configuration
35
Audio Electronic Characteristic
35
Tdd
35
SIM Card Interface
36
SIM Card Application
36
SIM Card Design Guide
37
Design Considerations for SIM Card Holder
37
Table 18: Pin Description (Molex Sim Card Holder)
38
PCM Interface
39
PCM Interface
40
Keypad Interface
40
Figure 37: 25 Keys Reference Circuit
41
I2C Bus
42
General Purpose Input/Output (GPIO)
43
Adc
43
Pwm
44
Table 26: Adc Specification
44
Network Status Indication
45
Operating Status Indication
45
LED Interface
46
RF Synchronization Signal
46
Antenna Interface
47
GSM Antenna Interface
47
FM Antenna Interface
48
Figure 49: Gnd Pin of the Earphone Use to be the Fm Antenna Interface
49
5 PCB Layout
50
Pin Assignment
50
Principle of PCB Layout
50
Antenna Interface
51
Power Supply
51
SIM Card Interface
51
Audio Interface
51
Others
51
Recommended PCB Layout
51
Figure 51: Recommended Pcb Layout
52
6 Electrical, Reliability and Radio Characteristics
53
Absolute Maximum Ratings
53
Recommended Operating Conditions
53
Digital Interface Characteristics
53
SIM Card Interface Characteristics
53
SIM_VDD Characteristics
54
VDD_EXT Characteristics
54
VRTC Characteristics
54
Current Consumption (VBAT=3.8V)
54
Electro-Static Discharge
55
Radio Characteristics
56
Module RF Output Power
56
Module RF Receive Sensitivity
57
Module Operating Frequencies
57
7 Manufacturing
58
Top and Bottom View of SIM800L
58
Typical Solder Reflow Profile
58
The Moisture Sensitivity Level
59
Baking Requirements
59
8 Appendix
60
Related Documents
60
Terms and Abbreviations
61
Safety Caution
63
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SimCom SIM800L Specifications
General
Brand
SimCom
Model
SIM800L
Category
Recording Equipment
Language
English
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