Smart Machine Smart Decision
SIM800C_Hardware_Design_V1.02 3 2015-4-27
Contents
Version History............................................................................................................8
1. Introduction..........................................................................................................9
2. SIM800C Overview .............................................................................................9
2.1. SIM800C...............................................................................................................................9
2.2. SIM800C Key Features.........................................................................................................9
2.3. Operating Mode ..................................................................................................................11
2.4. Functional Diagram.............................................................................................................12
3. Package Information.........................................................................................13
3.1. Pin Out Diagram .................................................................................................................13
3.2. Pin Description....................................................................................................................13
3.3. Package Dimensions ...........................................................................................................15
4. Application Interface.........................................................................................17
4.1. Power Supply ......................................................................................................................17
4.1.1. Power Supply Pin................................................................................................................................ 18
4.1.2. Monitoring Power Supply ................................................................................................................... 19
4.2. Power on/off SIM800C.......................................................................................................19
4.2.1. Power on SIM800C............................................................................................................................. 19
4.2.2. Power off SIM800C ............................................................................................................................ 20
4.3. Power Saving Mode............................................................................................................22
4.3.1. Minimum Functionality Mode ............................................................................................................ 22
4.3.2. Sleep Mode 1 (AT+CSCLK=1) .......................................................................................................... 22
4.3.3. Wake Up SIM800C from Sleep Mode 1............................................................................................. 23
4.3.4. Sleep Mode 2 (AT+CSCLK=2) .......................................................................................................... 23
4.3.5. Wake Up SIM800C from Sleep Mode 2............................................................................................. 23
4.4. Power Saving Mode............................................................................................................23
4.5. Serial Port and USB Interface.............................................................................................24
4.5.1 Function of Serial Port ........................................................................................................................ 25
4.5.2 Serial Interfaces................................................................................................................................... 25
4.5.3 Debug Interface................................................................................................................................... 27
4.5.4 Software Upgrade................................................................................................................................ 28
4.6. UART1_RI Behaviors.........................................................................................................28
4.7. Audio Interfaces..................................................................................................................29
4.7.1. Speaker Interfaces Configuration........................................................................................................ 30
4.7.2. Microphone Interfaces Configuration ................................................................................................. 30
4.7.3. Audio Electronic Characteristic .......................................................................................................... 30
4.7.4. TDD .................................................................................................................................................... 31
4.8. SIM Card Interface..............................................................................................................31
4.8.1. SIM Card Application ......................................................................................................................... 31
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