Product Info
Table Of Contents
- About the Document
- Contents
- Table Index
- Figure Index
- 1Introduction
- 2Product Concept
- 3Application 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 Interface
- 3.10.UART Interfaces
- 3.11.(U)SIM Interfaces
- 3.12.SD Card Interface
- 3.13.GPIO Interfaces
- 3.14.I2C Interfaces
- 3.15.ADC Interfaces
- 3.16.Motor Drive Interface
- 3.17.LCM Interface
- 3.18.Touch Panel Interface
- 3.19.Camera Interfaces
- 3.20.Sensor Interfaces
- 3.21.Audio Interfaces
- 3.22.Emergency Download Interface
- 4Wi-Fi and BT
- 5GNSS
- 6Antenna Interface
- 7Electrical, Reliability and Radio Characteristics
- 8Mechanical Dimensions
- 9Storage, Manufacturing and Packaging
- 10Appendix A References
- 11Appendix B GPRS Coding Schemes
- 12Appendix C GPRS Multi-slot Classes
- 13Appendix D EDGE Modulation and Coding Schemes
Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design Confidential / Released
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MIPI are high speed signal lines. It is recommended that common-mode filters should be added in series
near the LCM connector, so as to improve protection against electromagnetic radiation interference.
ICMEF112P900MFR from ICT is recommended.
When compatible design with other displays is required, please connect the LCD_ID pin of LCM to the
module’s ADC pin, and please note that the output voltage of LCD_ID cannot exceed the voltage range of
ADC pin.
Backlight driving circuit needs to be designed for LCM, and a reference circuit design is shown in the
following figure. Backlight brightness adjustment can be realized by PWM pin of SC20 module through
adjusting the duty ratio.
Figure 22: Reference Design for Backlight Dirving Circuit
3.18. Touch Panel Interface
SC20 provides a set of I2C interface for connection with Touch Panel (TP), and also provides the
corresponding power supply and interrupt pins. The definition of TP interface pins is illustrated below.
Table 21: Pin Definition of Touch Panel Interface
Pin Name
Pin No
I/O
Description
Comment
LDO6_1V8
125
PO
1.8V output power supply for
TP I/O power
Pull-up power supply of I2C.
1.8V normal voltage
LDO17_2V85
129
PO
2.85V output power supply
for TP VDD power
TP power supply.
2.85V normal voltage
TP_INT
30
DI
Interrupt signal of TP
TP_RST
31
DO
Reset signal of TP
Active low