Quectel BC65, Проектирование аппаратного обеспечения

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NB-IoT Module Series
BC65 Hardware Design
BC65_Hardware_Design 5 / 55
Contents
Safety Information ....................................................................................................................................... 3
About the Document ................................................................................................................................... 4
Contents ....................................................................................................................................................... 5
Table Index ................................................................................................................................................... 7
Figure Index ................................................................................................................................................. 8
1 Introduction .......................................................................................................................................... 9
1.1. Special Mark ............................................................................................................................... 9
2 Product Concept ................................................................................................................................ 10
2.1. General Description .................................................................................................................. 10
2.2. Key Features ............................................................................................................................. 11
2.3. Functional Diagram ................................................................................................................... 12
2.4. Development Board .................................................................................................................. 13
3 Application Interfaces ....................................................................................................................... 14
3.1. General Description .................................................................................................................. 14
3.2. Pin Assignment ......................................................................................................................... 15
3.3. Pin Description .......................................................................................................................... 16
3.4. Operating Modes ....................................................................................................................... 19
3.5. Power Saving ............................................................................................................................ 20
3.5.1. Light Sleep Mode ........................................................................................................... 20
3.5.2. Deep Sleep Mode .......................................................................................................... 20
3.6. Power Supply ............................................................................................................................ 21
3.6.1. Power Supply Pins ......................................................................................................... 21
3.6.2. Reference Design for Power Supply .............................................................................. 22
3.7. Turn On/Off and Reset .............................................................................................................. 22
3.7.1. Turn On .......................................................................................................................... 22
3.7.2. Turn Off .......................................................................................................................... 24
3.7.3. Reset the Module ........................................................................................................... 25
3.8. UART Interfaces ........................................................................................................................ 27
3.8.1. Main UART Interface ...................................................................................................... 28
3.8.2. Debug UART Interface ................................................................................................... 28
3.8.3. Auxiliary UART Interface* .............................................................................................. 29
3.8.4. UART Application ........................................................................................................... 29
3.9. USIM Interface .......................................................................................................................... 31
3.10. ADC Interface ............................................................................................................................ 33
3.11. RI Behaviors .............................................................................................................................. 33
3.12. Network Status Indication ......................................................................................................... 33
4 Antenna Interface ............................................................................................................................... 35
4.1. Antenna Interface ...................................................................................................................... 35
4.1.1. Operating Bands ............................................................................................................ 35