Adc Interfaces; Motor Drive Interface - Quectel SC20 Series Hardware Design

SENSOR_I2C_SCL
SENSOR_I2C_SDA

3.16. ADC Interfaces

SC20 series provides three analog-to-digital converter (ADC) interfaces, and the pin definition is shown
below.
Table 20: Pin Definition of ADC Interfaces
Pin Name Pin No.
ADC 128
VBAT_SNS 133
VBAT_THERM 134
The resolution of the ADC pin is up to 16 bits and the effective resolution is 12 bits.
NOTE
When the input voltage exceeds the maximum input voltage of the VBAT_SNS pin, apply the voltage
division design via the ADC pin instead of VBAT_SNS.

3.17. Motor Drive Interface

The pin definition of motor drive interface is listed below.
SC20_Series_Hardware_Design
I2C clock signal for external
91 OD
sensor
I2C data signal for external
92 OD
sensor
I/O Description
AI General purpose ADC
AI Battery voltage detect
AI Battery temperature detect
Smart Module Series
Used for external sensor
Comment
Maximum input voltage: 1.7 V.
Maximum input voltage: 4.5 V.
Internally pulled up.
Externally connect it to the 47 kΩ
NTC thermistor.
If it is not used, connect it to GND
with a 47 kΩ resistor.
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