Product Info

Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design Confidential / Released
3
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Contents
About the Document..................................................................................................................................................2
Contents........................................................................................................................................................................3
Table Index................................................................................................................................................................... 6
Figure Index................................................................................................................................................................. 8
1 Introduction....................................................................................................................................................... 10
1.1. Safety Information.................................................................................................................................10
2 Product Concept...............................................................................................................................................13
2.1. General Description..............................................................................................................................13
2.2. Key Features......................................................................................................................................... 16
2.3. Functional Diagram.............................................................................................................................. 19
2.4. Evaluation Board...................................................................................................................................20
3 Application Interfaces.....................................................................................................................................21
3.1. General Description..............................................................................................................................21
3.2. Pin Assignment..................................................................................................................................... 22
3.3. Pin Description......................................................................................................................................23
3.4. Power Supply........................................................................................................................................ 34
3.4.1. Power Supply Pins.....................................................................................................................34
3.4.2. Decrease Voltage Drop.............................................................................................................34
3.4.3. Reference Design for Power Supply.......................................................................................35
3.5. Turn on and off Scenarios...................................................................................................................36
3.5.1. Turn on Module Using the PWRKEY......................................................................................36
3.5.2. Turn off Module...........................................................................................................................38
3.6. VRTC Interface......................................................................................................................................38
3.7. Power Output.........................................................................................................................................39
3.8. Battery Charge and Management......................................................................................................40
3.9. USB Interface........................................................................................................................................ 41
3.10. UART Interfaces....................................................................................................................................43
3.11. (U)SIM Interfaces..................................................................................................................................45
3.12. SD Card Interface.................................................................................................................................47
3.13. GPIO Interfaces.................................................................................................................................... 49
3.14. I2C Interfaces........................................................................................................................................ 51
3.15. ADC Interfaces......................................................................................................................................52
3.16. Motor Drive Interface............................................................................................................................52
3.17. LCM Interface........................................................................................................................................53
3.18. Touch Panel Interface.......................................................................................................................... 55
3.19. Camera Interfaces................................................................................................................................56
3.19.1. Rear Camera Interface..............................................................................................................56
3.19.2. Front Camera Interface.............................................................................................................58
3.19.3. Design Considerations.............................................................................................................. 60
3.20. Sensor Interfaces..................................................................................................................................61