Table Of Contents; Contents - Quectel SC20 Series Hardware Design

Contents

Safety Information ....................................................................................................................................... 3
About the Document ................................................................................................................................... 4
Contents ....................................................................................................................................................... 6
Table Index ................................................................................................................................................... 9
Figure Index ............................................................................................................................................... 11
1 Introduction ........................................................................................................................................ 13
2 Product Overview .............................................................................................................................. 14
2.1. General Description ................................................................................................................. 14
2.2. Key Features ........................................................................................................................... 17
2.3. Functional Diagram ................................................................................................................. 20
2.4. EVB .......................................................................................................................................... 21
3 Application Interfaces ....................................................................................................................... 22
3.1. General Description ................................................................................................................. 22
3.2. Pin Assignment ........................................................................................................................ 23
3.3. Pin Description ......................................................................................................................... 24
3.4. Power Supply ........................................................................................................................... 34
3.4.1. Power Supply Pins ......................................................................................................... 34
3.4.2. Voltage Stability Requirements ...................................................................................... 34
3.4.3. Reference Design for Power Supply .............................................................................. 36
3.5. Turn on and off Scenarios ....................................................................................................... 36
3.5.1. Turn on with PWRKEY ................................................................................................... 36
3.5.2. Turn off ........................................................................................................................... 38
3.6. VRTC Interface ........................................................................................................................ 39
3.7. Power Output ........................................................................................................................... 40
3.8. Battery Charging and Management ........................................................................................ 40
3.9. USB Interface .......................................................................................................................... 42
3.10. UART Interfaces ...................................................................................................................... 44
3.11. (U)SIM Interfaces..................................................................................................................... 46
3.12. SD Card Interface .................................................................................................................... 48
3.13. GPIO Interfaces ....................................................................................................................... 50
3.14. SPI Interface ............................................................................................................................ 52
3.15. I2C Interfaces .......................................................................................................................... 53
3.16. ADC Interfaces ........................................................................................................................ 54
3.17. Motor Drive Interface ............................................................................................................... 54
3.18. LCM Interface .......................................................................................................................... 55
3.19. Touch Panel Interface .............................................................................................................. 58
3.20. Camera Interfaces ................................................................................................................... 59
3.20.1. Rear Camera Interface................................................................................................... 59
3.20.2. Front Camera Interface .................................................................................................. 60
3.20.3. Design Considerations ................................................................................................... 62
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