hardware design v2.00
Table Of Contents
- Contents
- Version History
- 1 Introduction
- 2 SIM908 Overview
- 3 Package Information
- 4 GSM Application Interface
- 4.1 Power Supply
- 4.2 Power on/down Scenarios
- 4.3 Power Saving Mode
- 4.4 Charging Interface
- 4.5 RTC Backup
- 4.6 Serial Interfaces
- 4.7 Audio Interfaces
- 4.8 SIM Card Interface
- 4.9 LCD Display/SPI Interface
- 4.10 Keypad Interface
- 4.11 ADC
- 4.12 RI Behaviors
- 4.13 Network Status Indication
- 4.14 General Purpose Input/Output (GPIO)
- 4.15 PWM
- 4.16 I2C Bus
- 4.17 GSM Antenna Interface
- 5 GPS Application Interface
- 6 Electrical, Reliability and Radio Characteristics
- 6.1 Absolute Maximum Ratings
- 6.2 Recommended Operating Conditions
- 6.3 Digital Interface Characteristics
- 6.4 SIM Card Interface Characteristics
- 6.5 VDD_EXT Characteristics
- 6.6 SIM_VDD Characteristics
- 6.7 VRTC Characteristics
- 6.8 Current Consumption (VBAT = 3.8V, GPS engine is powered down)
- 6.9 Electro-Static Discharge
- 6.10 Radio Characteristics
- 6.11 Module label information
- Appendix
Smart Machine Smart Decision
SIM908_Hardware Design_V2.00 7 2012.05.07
Version History
Date Version Description of change Author
2011-06-28 1.00 Origin LiGang
2011-08-26 1.01 Correct the NC pins;
Correct the name of table 19;
Ma Honggang
2011-08-29 1.02 Modify antenna design guide Ye Haibing
2011-09-02 1.03 Correct the figure 21 MA Honggang
2011-09-09 1.04 Add NC PIN53 MA Honggang
2011-09-22 1.05 Correct the pin44 name in figure 2 MA Honggang
2011-11-10 1.06 Modify GSM/GPS antenna interface Ye Haibing
2011-12-13 1.07 Add ESD design consideration Ma Honggang
2012-01-17 1.08 Reinforce the explaining of the SIM_Presence signal and
AT commands about power saving mode.
Ma Honggang
2012-02-21 1.09 Correct the page number；delete Manufacturing chapter Ma Honggang
2012-05-07 2.00 Add chapter 6.11: Module label information.
Add some notes in chapter 5.
Ma Honggang