Smart Machine Smart Decision
SIM800_Hardware Design_V1.10 3 2018-08-13
Contents
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 ................................................................................................................................ 22
4.1.2. Monitoring Power Supply ................................................................................................................... 22
4.2. Power on/off SIM800 ............................................................................................................................. 22
4.2.1. Power on SIM800 ............................................................................................................................... 22
4.2.2. Power off SIM800 ............................................................................................................................... 24
4.2.3. Reset Function ..................................................................................................................................... 25
4.3. Power Saving Mode................................................................................................................................ 26
4.3.1. Function Mode .................................................................................................................................... 26
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 ........................................................................................................................................... 27
4.5. Serial Port and USB Interface................................................................................................................. 28
4.5.1 Function of Serial Port ........................................................................................................................ 29
4.5.2 Serial Port ............................................................................................................................................ 29
4.5.3 USB Interface ...................................................................................................................................... 31
4.5.4 Software Upgrade and Debug ............................................................................................................. 32
4.6. RI Behaviors ........................................................................................................................................... 33
4.7. Audio Interfaces ..................................................................................................................................... 34
4.7.1. Speaker Interfaces Configuration ........................................................................................................ 35
4.7.2. Microphone Interfaces Configuration ................................................................................................. 35
4.7.3. Audio Electronic Characteristic .......................................................................................................... 36
4.7.4. TDD .................................................................................................................................................... 36
4.8. Bluetooth ................................................................................................................................................ 36
4.9. SIM Card Interface ................................................................................................................................. 37
4.9.1. SIM Card Application ......................................................................................................................... 37
4.9.2. SIM Card Design Consideration ......................................................................................................... 38
4.9.3. Design Considerations for SIM Card Holder ...................................................................................... 38
4.10. PCM Interface ........................................................................................................................................ 40
4.10.1. PCM Interface .................................................................................................................................. 41
4.11. Keypad Interface..................................................................................................................................... 41
4.12. I2C BUS ................................................................................................................................................. 44
4.13. General Purpose Input/Output (GPIO) ................................................................................................... 44
4.14. ADC ........................................................................................................................................................ 45
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