Product Info

Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 3 / 139
Contents
About the Document ................................................................................................................................... 2
Contents ....................................................................................................................................................... 3
Table Index ................................................................................................................................................... 6
Figure Index ................................................................................................................................................. 8
1 Introduction ........................................................................................................................................ 13
1.1. Safety Information ..................................................................................................................... 14
2 Product Concept ................................................................................................................................ 15
2.1. General Description .................................................................................................................. 15
2.2. Key Features ............................................................................................................................. 19
2.3. Functional Diagram ................................................................................................................... 22
2.4. Evaluation Board ....................................................................................................................... 23
3 Application Interfaces ....................................................................................................................... 24
3.1. General Description .................................................................................................................. 24
3.2. Pin Assignment ......................................................................................................................... 25
3.3. Pin Description .......................................................................................................................... 26
3.4. Power Supply ............................................................................................................................ 42
3.4.1. Power Supply Pins ......................................................................................................... 42
3.4.2. Decrease Voltage Drop .................................................................................................. 42
3.4.3. Reference Design for Power Supply .............................................................................. 43
3.5. Turn on and off Scenarios ......................................................................................................... 45
3.5.1. Turn on the Module Using PWRKEY ............................................................................. 45
3.5.2. Turn on the Module Automatically .................................................................................. 47
3.5.3. Reboot/Turn off the Module ........................................................................................... 47
3.6. VRTC Interface ......................................................................................................................... 48
3.7. Power Output ............................................................................................................................ 49
3.8. Battery Charge and Management ............................................................................................. 49
3.9. USB Interfaces .......................................................................................................................... 52
3.9.1. Type-C Interface ............................................................................................................. 52
3.9.1.1. USB Type-C Mode ............................................................................................... 52
3.9.1.2. DisplayPort Mode ................................................................................................. 54
3.9.2. Micro USB Interface ....................................................................................................... 55
3.9.3. USB Interface Design Considerations ........................................................................... 57
3.10. UART Interfaces ........................................................................................................................ 58
3.11. (U)SIM Interfaces ...................................................................................................................... 60
3.12. SD Card Interface ..................................................................................................................... 62
3.13. GPIO Interfaces ........................................................................................................................ 64
3.14. I2C Interfaces ............................................................................................................................ 65
3.15. I2S Interfaces ............................................................................................................................ 66
3.16. SPI Interface ............................................................................................................................. 68
3.17. ADC Interfaces .......................................................................................................................... 68