hardware design v1.00
Table Of Contents
- Contents
- Version History
- 1 Introduction
- 2 SIM968 Overview
- 3 Package Information
- 4 GSM Application Interface
- 4.1 GSM 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 External Reset
- 4.16 PWM
- 4.17 I2C Bus
- 4.18 GSM Antenna Interface
- 5 GNSS 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)
- 6.9 Electro-Static Discharge
- 6.10 Radio Characteristics
- 6.11 Module label information
- Appendix
Smart Machine Smart Decision
SIM968_Hardware Design_V1.00 2013.02.25
3
Contents
Contents.................................................................................................................................................................... 3
Version History........................................................................................................................................................ 7
1 Introduction....................................................................................................................................................... 8
2 SIM968 Overview ............................................................................................................................................. 8
2.1 SIM968 Key Features............................................................................................................................... 9
2.2 Operating Modes .....................................................................................................................................11
2.3 SIM968 Functional Diagram .................................................................................................................. 12
3 Package Information ...................................................................................................................................... 13
3.1 Pin out Diagram...................................................................................................................................... 13
3.2 Pin Description ....................................................................................................................................... 13
3.3 Package Dimensions............................................................................................................................... 16
4 GSM Application Interface............................................................................................................................ 18
4.1 GSM Power Supply................................................................................................................................ 18
4.1.1 Minimizing Voltage Drop of VBAT................................................................................................... 19
4.1.2 Monitoring Power Supply ................................................................................................................... 19
4.2 Power on/down Scenarios ...................................................................................................................... 19
4.2.1 Power on SIM968 ............................................................................................................................... 19
4.2.2 Power down SIM968........................................................................................................................... 21
4.2.3 Restart SIM968 by PWRKEY Pin ...................................................................................................... 22
4.3 Power Saving Mode................................................................................................................................ 23
4.3.1 Minimum Functionality Mode ............................................................................................................ 23
4.3.2 Sleep Mode 1 (AT+CSCLK=1) .......................................................................................................... 23
4.3.3 Wake Up SIM968 from Sleep Mode 1 (AT+CSCLK=1) ................................................................... 23
4.3.4 Sleep Mode 2 (AT+CSCLK=2) .......................................................................................................... 24
4.3.5 Wake Up SIM968 from Sleep Mode 2 (AT+CSCLK=2) ................................................................... 24
4.4 Charging Interface .................................................................................................................................. 24
4.4.1 Battery Pack Characteristics................................................................................................................ 25
4.4.2 Recommended Battery Pack ............................................................................................................... 25
4.4.3 Implemented Charging Technique ...................................................................................................... 25
4.4.4 Operating Modes during Charging...................................................................................................... 26
4.4.5 Charger Requirements......................................................................................................................... 27
4.5 RTC Backup ........................................................................................................................................... 27
4.6 Serial Interfaces ...................................................................................................................................... 29
4.6.1 Function of Serial Port and Debug Port .............................................................................................. 29
4.6.2 Software Upgrade and Debug ............................................................................................................. 30
4.7 Audio Interfaces ..................................................................................................................................... 31
4.7.1 Speaker Interface Configuration ......................................................................................................... 31
4.7.2 Microphone Interfaces Configuration ................................................................................................. 32
4.7.3 Earphone Interface Configuration....................................................................................................... 32
4.7.4 Audio Electronic Characteristics......................................................................................................... 32
4.8 SIM Card Interface ................................................................................................................................. 33
4.8.1 SIM Card Application ......................................................................................................................... 33