Specifications
Manuals
Brands
Rhydo Manuals
Computer equipment
SIM 900 SIM 900 -TTL UART
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Table Of Contents
Version history
1 Introduction
1.1 References Document
2 Application Interface
2.1 Power Supply Design
2.1.1 VBAT design
2.1.2 Battery Charge design
2.1.3 PWRKEY ON/OFF design
2.1.4 Reset design
2.1.5 RTC backup design
2.2. UART interface
2.2.1 UART interface design
2.3 GPIO selection
2.3.1 STATUS and NETLIGHT
2.3.2 GPIO
2.4 Audio interfaces
2.4.1 Referenced circuit of headset design
2.4.2 Referenced circuit of hand free design
2.5 Antenna matching circuit design
2.6 SIM card interface
2.7 ESD protection
2.8 Consideration in PCB layout
SIM900
Reference
Design
Guide
Notes
SIM900_AN_Reference Design Guide_V1.01
01.27.2010
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Version history
Date
V
ersion
Description of change
Author
2010-01-01
1.01
First Release
Zhou
Qiang
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