Product Info

Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design 3 / 130
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 6
Figure Index ................................................................................................................................................. 8
1 Introduction ........................................................................................................................................ 13
1.1. Safety Information.................................................................................................................... 13
2 Product Concept ................................................................................................................................ 15
2.1. General Description ................................................................................................................. 15
2.2. Key Features ........................................................................................................................... 18
2.3. Functional Diagram ................................................................................................................. 21
2.4. Evaluation Board ..................................................................................................................... 22
3 Application Interfaces ....................................................................................................................... 23
3.1. General Description ................................................................................................................. 23
3.2. Pin Assignment ........................................................................................................................ 24
3.3. Pin Description ......................................................................................................................... 25
3.4. Power Supply ........................................................................................................................... 36
3.4.1. Power Supply Pins ......................................................................................................... 36
3.4.2. Decrease Voltage Drop .................................................................................................. 36
3.4.3. Reference Design for Power Supply .............................................................................. 37
3.5. Turn on and off Scenarios ....................................................................................................... 38
3.5.1. Turn on Module Using the PWRKEY ............................................................................. 38
3.5.2. Turn off Module .............................................................................................................. 40
3.6. VRTC Interface ........................................................................................................................ 40
3.7. Power Output ........................................................................................................................... 41
3.8. Battery Charge and Management ........................................................................................... 42
3.9. USB Interface .......................................................................................................................... 43
3.10. UART Interfaces ...................................................................................................................... 45
3.11. (U)SIM Interfaces..................................................................................................................... 47
3.12. SD Card Interface .................................................................................................................... 49
3.13. GPIO Interfaces ....................................................................................................................... 51
3.14. SPI Interface ............................................................................................................................ 53
3.15. I2C Interfaces .......................................................................................................................... 54
3.16. ADC Interfaces ........................................................................................................................ 54
3.17. Motor Drive Interface ............................................................................................................... 55
3.18. LCM Interface .......................................................................................................................... 56
3.19. Touch Panel Interface .............................................................................................................. 58
3.20. Camera Interfaces ................................................................................................................... 59
3.20.1. Rear Camera Interface................................................................................................... 59