Hardware Design V1.01(091226)
Table Of Contents
- Contents
- Version history
- 1 Introduction
- 2 SIM900 Overview
- 3 Application Interface
- 3.1 SIM900 Pin Description
- 3.2 Operating Modes
- 3.3 Power Supply
- 3.4 Power Up and Power Down Scenarios
- 3.5 Power Saving
- 3.6 Summary of State Transitions (except SLEEP mode)
- 3.7 RTC Backup
- 3.8 Serial Interfaces
- 3.9 Audio Interfaces
- 3.10 SIM Card Interface
- 3.11 LCD Display Interface
- 3.12 Keypad Interface
- 3.13 ADC
- 3.14 Behaviors of the RI
- 3.15 Network Status Indication
- 3.16 General Purpose Input Output (GPIO)
- 3.17 External Reset
- 3.18 PWM
- 3.19 I2C Bus
- 4 Antenna Interface
- 5 Electrical, Reliability and Radio Characteristics
- 6 Mechanics
SIM900 Hardware Design
2.3 SIM900 Evaluation Board
In order to help you on the application of SIM900, SIMCom can supply an Evaluation Board (EVB) that
interfaces the SIM900 directly with appropriate power supply, SIM card holder, RS232 serial port, handset port,
earphone port, line in port, antenna and all GPIO of the SIM900.
Figure 2: Top view of SIM900 EVB
For details please refer to the SIM900-EVB_UGD document.
SIM900_HD_V1.01 26.12.2009
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