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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3.15. ADC Interfaces
SC20 module provides three analog-to-digital converter (ADC) interfaces, and the pin definition is shown
below.
Table 18: Pin Definition of ADC Interfaces
Pin Name
Pin No
I/O Description
Comment
ADC
128
AI
General purpose ADC
Max input voltage is 1.7V
VBAT_SNS
133
AI
Input voltage sense
Max input voltage is 4.5V
VBAT_THERM
134
AI
Battery temperature detection
Internal pull-up; externally
connect to GND with a 47K NTC
thermistor
The resolution of the ADC is up to 16 bits.
When the input voltage exceeds the maximum input voltage of VBAT_SNS pin, resistor divider cannot be
used in the circuit design. Instead, general purpose ADC with resistor divider input can be used.
3.16. Motor Drive Interface
The pin of motor drive interface is listed below.
Table 19: Pin Definition of Motor Drive Interface
Pin Name
Pin No
I/O Description
Comment
VIB_DRV
28
PO
Motor drive
Connected to the negative terminal of the motor
The motor is driven by an exclusive circuit, and a reference circuit design is shown below.
NOTE