Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1 Introduction
- 2 Product Concept
- 3 Application Interfaces
- 3.1. General Description
- 3.2. Pin Assignment
- 3.3. Pin Description
- 3.4. Power Supply
- 3.5. Turn on and off Scenarios
- 3.6. VRTC Interface
- 3.7. Power Output
- 3.8. Battery Charge and Management
- 3.9. USB Interfaces
- 3.10. UART Interfaces
- 3.11. (U)SIM Interfaces
- 3.12. SD Card Interface
- 3.13. GPIO Interfaces
- 3.14. I2C Interfaces
- 3.15. I2S Interfaces
- 3.16. SPI Interface
- 3.17. ADC Interfaces
- 3.18. LCM Interfaces
- 3.19. Touch Panel Interfaces
- 3.20. Camera Interfaces
- 3.21. Sensor Interfaces
- 3.22. Audio Interfaces
- 3.23. Emergency Download Interface
- 4 Wi-Fi and BT
- 5 GNSS
- 6 Antenna Interfaces
- 7 Electrical, Reliability and Radio Characteristics
- 8 Mechanical Dimensions
- 9 Storage, Manufacturing and Packaging
- 10 Appendix A References
- 11 Appendix B GPRS Coding Schemes
- 12 Appendix C GPRS Multi-slot Classes
- 13 Appendix D EDGE Modulation and Coding Schemes
- IC & FCC Requirement
Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 71 / 139
The following are the reference designs for LCM interfaces. LCM can use external backlight drive circuit
according to customer requirement. The reference design of the external backlight drive circuit is shown
in the figure below, in which pins PWM (Pin 152 & Pin 238) can be used for backlight brightness
adjustment.
LCM0 _LED+
Module
2.2uF
Backlight
Driver
LCM0_LED-
VPH_PWR
C1
PWM
Figure 22: LCM0 External Backlight Driver Reference Circuit
LCM1 _LED+
Module
2.2uF
Backlight
Driver
LCM1_LED-
VPH_PWR
C1
GPIO_40
Figure 23: Reference Circuit Design for LCM1 Interface
GPIO_40 238 DO LCD1 PWM output Used as a GPIO by default