User's Manual
GSM/GPRS/GNSS Module Series
MC20 Hardware Design
MC20_Hardware_Design Confidential / Released 3 / 95
Contents
About the Document ................................................................................................................................ 2
Contents .................................................................................................................................................... 3
Table Index ............................................................................................................................................... 6
Figure Index .............................................................................................................................................. 8
1 Introduction ..................................................................................................................................... 10
1.1. Safety Information ................................................................................................................. 10
2 Product Concept ............................................................................................................................. 12
2.1. General Description .............................................................................................................. 12
2.2. Directives and Standards ...................................................................................................... 13
2.2.1. 2.2.1. FCC Statement .................................................................................................. 13
2.2.2. FCC Radiation Exposure Statement ............................................................................ 13
2.3. Key Features ......................................................................................................................... 13
2.4. Functional Diagram ............................................................................................................... 17
2.5. Evaluation Board ................................................................................................................... 18
3 Application Functions..................................................................................................................... 19
3.1. Pin of Module ........................................................................................................................ 20
3.1.1. Pin Assignment ............................................................................................................ 20
3.1.2.
Pin Description ............................................................................................................. 21
3.2. Application Modes Introduction ............................................................................................. 25
3.3. Power Supply ........................................................................................................................ 27
3.3.1. Power Features ........................................................................................................... 27
3.3.2. Decrease Supply Voltage Drop .................................................................................... 28
3.3.2.1. Decrease Supply Voltage Drop for GSM Part .................................................. 28
3.3.2.2. Decrease Supply Voltage Drop for GNSS Part ................................................ 29
3.3.3. Reference Design for Power Supply ............................................................................ 30
3.3.3.1. Reference Design for Power Supply of GSM Part ........................................... 30
3.3.3.2. Reference Design for Power Supply of GNSS Part ......................................... 31
3.3.4. Monitor Power Supply .................................................................................................. 31
3.3.5. Backup Domain of GNSS ............................................................................................ 31
3.4. Operating Modes .................................................................................................................. 32
3.4.1. Operating Modes of GSM Part ..................................................................................... 32
3.4.1.1. Minimum Functionality Mode ........................................................................... 33
3.4.1.2. SLEEP Mode ................................................................................................... 34
3.4.1.3. Wake up GSM Part from SLEEP Mode ........................................................... 34
3.4.2. Operating Modes of GNSS Part ................................................................................... 34
3.4.2.1. Full on Mode.................................................................................................... 34
3.4.2.2. Standby Mode ................................................................................................. 36
3.4.2.3. Backup Mode .................................................................................................. 36