Hardware Design V1.0

NB-IoT Module Series
BC95 Hardware Design
BC95_Hardware_Design Confidential / Released 3 / 45
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 5
Figure Index ................................................................................................................................................. 6
1 Introduction .......................................................................................................................................... 7
1.1. Safety Information ................................................................................................................... 8
2 Product Concept .................................................................................................................................. 9
2.1. General Description ................................................................................................................. 9
2.2. Key Features ......................................................................................................................... 10
2.3. Functional Diagram ............................................................................................................... 11
2.4. Evaluation Board ................................................................................................................... 11
3 Application Functions ....................................................................................................................... 12
3.1. General Description ............................................................................................................... 12
3.2. Pin Assignment ...................................................................................................................... 13
3.3. Pin Description ...................................................................................................................... 14
3.4. Operating Modes ................................................................................................................... 17
3.5. Power Supply ........................................................................................................................ 17
3.5.1. Power Supply Pins ......................................................................................................... 17
3.5.2. Reference Design for Power Supply .............................................................................. 18
3.6. Power on and down Scenarios ............................................................................................. 19
3.6.1. Power on ........................................................................................................................ 19
3.6.2. Power down.................................................................................................................... 19
3.6.3. Reset the Module ........................................................................................................... 20
3.7. SWD Interface ....................................................................................................................... 21
3.8. UART Interfaces .................................................................................................................... 21
3.8.1. Main Port ........................................................................................................................ 22
3.8.2. Debug Port ..................................................................................................................... 23
3.8.3. The UART Application .................................................................................................... 23
3.9. ADC Interface* ....................................................................................................................... 25
3.10. USIM Card Interface .............................................................................................................. 25
3.10.1. USIM Card Application ................................................................................................... 25
3.11. Behaviors of the RI* .............................................................................................................. 27
3.12. Network Status Indication* .................................................................................................... 27
4 Antenna Interface ............................................................................................................................... 29
4.1. RF Reference Design ............................................................................................................ 29
4.1.1. Impedance Control for RF Trace.................................................................................... 30
4.2. RF Output Power ................................................................................................................... 31
4.3. RF Receiving Sensitivity ........................................................................................................ 32
4.4. Operating Frequencies .......................................................................................................... 32
Quectel
Confidential