SIM Tech SIMCom SIM900-DS Manuals

SIM Tech SIMCom SIM900-DS Manuals

Manuals and User Guides for SIM Tech SIMCom SIM900-DS. We have 1 SIM Tech SIMCom SIM900-DS manual available for free PDF download: Hardware Design

SIM Tech SIMCom SIM900-DS Hardware Design

SIM Tech SIMCom SIM900-DS Hardware Design (48 pages)

Brand: SIM Tech | Category: Control Unit | Size: 3.06 MB

Table of Contents

Table of Contents
3
Contents
3
Introduction
8
SIM900-DS Overview
8
SIM900-DS Key Features
8
Operating Modes
10
SIM900-DS Functional Diagram
11
Package Information
12
Pin out Diagram
12
Pin Description
13
Package Dimensions
15
Application Interface
17
Power Supply
17
Minimizing Voltage Drop of VBAT
18
Monitoring Power Supply
18
Power On/Down Scenarios
18
Power on SIM900-DS
18
Power down SIM900-DS
19
Restart SIM900-DS by PWRKEY Pin
21
Power Saving Mode
21
Minimum Functionality Mode
21
Sleep Mode 1 (AT+CSCLK=1)
22
Wake up SIM900-DS from Sleep Mode 1 (AT+CSCLK=1)
22
Sleep Mode 2 (AT+CSCLK=2)
22
Wake up SIM900-DS from Sleep Mode 2 (AT+CSCLK=2)
23
RTC Backup
23
Serial Interfaces
24
Function of Serial Port and Debug Port
25
Software Upgrade and Debug
26
Audio Interfaces
26
Speaker Interface Configuration
26
Microphone Interfaces Configuration
27
Earphone Interface Configuration
28
Audio Electronic Characteristics
28
SIM Card Interface
29
SIM Card Application
29
Design Considerations for SIM Card Holder
30
LCD Display/Spi Interface
31
PCM Interface
32
Adc
32
RI Behaviors
32
Network Status Indication
33
General Purpose Input/Output (GPIO)
34
External Reset
34
I 2 C Bus
35
Antenna Interface
35
Electrical, Reliability and Radio Characteristics
37
Absolute Maximum Ratings
37
Recommended Operating Conditions
37
Digital Interface Characteristics
37
SIM Card Interface Characteristics
38
VDD_EXT Characteristics
38
SIM1_VDD and SIM2_VDD Characteristics
38
VRTC Characteristics
38
Current Consumption (VBAT = 3.8V)
39
Electro-Static Discharge
40
Radio Characteristics
40
Module RF Output Power
40
Module RF Receive Sensitivity
42
Module Operating Frequencies
42
Manufacturing
43
Top and Bottom View of SIM900-DS
43
Typical Solder Reflow Profile
44
Appendix
45
Related Documents
45
Terms and Abbreviations
46
Safety Caution
47

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