User's Manual

Smart Machine Smart Decision
SIM868_Hardware_Design_V1.00 3 2016-06-20
Contents
Version History ........................................................................................................ 9
1. Introduction .................................................................................................... 10
2. SIM868 Overview ........................................................................................... 10
2.1. SIM868 .......................................................................................................................... 10
2.2. SIM868 Key Features ..................................................................................................... 10
2.3. Operating Mode .............................................................................................................. 13
2.4. Functional Diagram ........................................................................................................ 14
3. Package Information ...................................................................................... 15
3.1. Pin Out Diagram ............................................................................................................. 15
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/off SIM868 ..................................................................................................... 22
4.2.1. Power on SIM868 ............................................................................................................................... 22
4.2.2. Power off SIM868 ............................................................................................................................... 23
4.3. Power Saving Mode........................................................................................................ 25
4.3.1. Minimum Functionality Mode ............................................................................................................ 25
4.3.2. Sleep Mode 1 (AT+CSCLK=1) .......................................................................................................... 25
4.3.3. Wake Up SIM868 from Sleep Mode 1 ................................................................................................ 25
4.3.4. Sleep Mode 2 (AT+CSCLK=2) .......................................................................................................... 26
4.3.5. Wake Up SIM868 from Sleep Mode 2 ................................................................................................ 26
4.4. Power Saving Mode........................................................................................................ 26
4.5. Serial Port and USB Interface ......................................................................................... 27
4.5.1 Function of Serial Port ........................................................................................................................ 28
4.5.2 Serial Interfaces ................................................................................................................................... 29
4.5.3 Debug Interface ................................................................................................................................... 30
4.5.4 Software Upgrade ................................................................................................................................ 31
4.6. UART1_RI Behaviors .................................................................................................... 31
4.7. Audio Interfaces ............................................................................................................. 32
4.7.1. Speaker Interfaces Configuration ........................................................................................................ 33
4.7.2. Microphone Interfaces Configuration ................................................................................................. 34
4.7.3. Audio Electronic Characteristic .......................................................................................................... 34
4.7.4. TDD .................................................................................................................................................... 34
4.8. SIM Card Interface ......................................................................................................... 35
4.8.1. SIM Card Application ......................................................................................................................... 35