Sim800 hardware design v1.05

Smart Machine Smart Decision
SIM800_Hardware Design_V1.05 3 2014-03-25
Contents
Version History........................................................................................................................................................ 9
1. Introduction ................................................................................................................................................. 10
2. SIM800 Overview........................................................................................................................................ 10
2.1. SIM800 Key Features............................................................................................................................. 10
2.2. Operating Modes .................................................................................................................................... 12
2.3. SIM800 Functional Diagram .................................................................................................................. 13
3. Package Information................................................................................................................................... 14
3.1. Pin Out Diagram..................................................................................................................................... 14
3.2. Pin Description ....................................................................................................................................... 15
3.3. Package Dimensions............................................................................................................................... 18
4. Application Interface .................................................................................................................................. 20
4.1. Power Supply.......................................................................................................................................... 20
4.1.1. Power Supply Pin................................................................................................................................ 21
4.1.2. Monitoring Power Supply ................................................................................................................... 22
4.2. Power on/down SIM800......................................................................................................................... 22
4.2.1. Power on SIM800 ............................................................................................................................... 22
4.2.2. Power down SIM800........................................................................................................................... 23
4.2.3. Reset Function..................................................................................................................................... 25
4.3. Power Saving Mode................................................................................................................................ 27
4.3.1. Function Mode .................................................................................................................................... 27
4.3.2. Sleep Mode (AT+CSCLK=1) ............................................................................................................. 27
4.3.3. Wake Up SIM800 from Sleep Mode (AT+CSCLK=1) ...................................................................... 27
4.4. RTC Backup ........................................................................................................................................... 28
4.5. Serial Port and USB Interface ................................................................................................................ 29
4.5.1 Function of Serial Port ........................................................................................................................ 29
4.5.2 Serial Port............................................................................................................................................ 30
4.5.3 USB Interface...................................................................................................................................... 32
4.5.4 Software Upgrade and Debug ............................................................................................................. 33
4.5.5 Multiplex Function of Serial Port........................................................................................................ 33
4.6. RI Behaviors........................................................................................................................................... 34
4.7. Audio Interfaces ..................................................................................................................................... 35
4.7.1. Speaker Interfaces Configuration........................................................................................................ 36
4.7.2. Microphone Interfaces Configuration ................................................................................................. 36
4.7.3. Audio Electronic Characteristic .......................................................................................................... 37
4.7.4. TDD .................................................................................................................................................... 37
4.8. Bluetooth ................................................................................................................................................ 37
4.9. SIM Card Interface ................................................................................................................................. 38
4.9.1. SIM Card Application ......................................................................................................................... 38
4.9.2. SIM Card Design Consideration ......................................................................................................... 39
4.9.3. Design Considerations for SIM Card Holder...................................................................................... 39
4.10. PCM Interface ........................................................................................................................................ 41
4.10.1. PCM Multiplex Function................................................................................................................. 42
4.10.2. PCM Interface.................................................................................................................................. 43
4.10.3. LCD Display/SPI Interface.............................................................................................................. 43