Quectel M35 - Table of Contents; Contents

GSM/GPRS Module Series
M35 User Manual
M35_User_Manual Confidential / Released 4 / 85
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 4
Table Index ................................................................................................................................................... 7
Figure Index ................................................................................................................................................. 8
1 Introduction ........................................................................................................................................ 10
1.1. Safety Information ................................................................................................................. 11
2 Product Concept ................................................................................................................................ 12
2.1. General Description ............................................................................................................... 12
2.2. Directives and Standards ...................................................................................................... 12
2.2.1. FCC Radiation Exposure Statement .............................................................................. 12
2.3. Key Features ......................................................................................................................... 13
2.4. Functional Diagram ............................................................................................................... 15
2.5. Evaluation Board ................................................................................................................... 16
3 Application Interface ......................................................................................................................... 17
3.1. Pin of Module ......................................................................................................................... 18
3.1.1. Pin Assignment .............................................................................................................. 18
3.1.2. Pin Description ............................................................................................................... 19
3.2. Operating Modes ................................................................................................................... 23
3.3. Power Supply ........................................................................................................................ 25
3.3.1. Power Features of Module ............................................................................................. 25
3.3.2. Decrease Supply Voltage Drop ...................................................................................... 25
3.3.3. Reference Design for Power Supply .............................................................................. 26
3.3.4. Monitor Power Supply .................................................................................................... 27
3.4. Power On and Down Scenarios ............................................................................................ 27
3.4.1. Power On ....................................................................................................................... 27
3.4.2. Power Down ................................................................................................................... 29
3.4.2.1. Power Down Module Using the PWRKEY Pin .................................................. 29
3.4.2.2. Power Down Module Using AT Command ........................................................ 30
3.4.2.3. Over-voltage or Under-voltage Automatic Shutdown ........................................ 30
3.4.2.4. Emergency Shutdown Using EMERG_OFF Pin ............................................... 31
3.4.3. Restart ............................................................................................................................ 32
3.5. Power Saving ........................................................................................................................ 33
3.5.1. Minimum Functionality Mode ......................................................................................... 33
3.5.2. SLEEP Mode .................................................................................................................. 34
3.5.3. Wake Up Module from SLEEP Mode ............................................................................. 34
3.5.4. Summary of State Transition .......................................................................................... 35
3.6. RTC Backup .......................................................................................................................... 35
3.7. Serial Interfaces ..................................................................................................................... 37