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3.15. ADC Interfaces
SC20-WL provides three analog-to-signal converter (ADC) interfaces, and the pin definition is shown
below.
Table 14: Pin Definition of ADC Interfaces
Pin Name
Pin No
ADC
128
VBAT_SNS
133
VBAT_THERM
134
The resolution of the ADC is up to 16 bits and the effective resolution is 12 bits.
NOTE
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 definition of motor drive interface is listed below.
Table 15: Pin Definition of Motor Drive Interface
Pin Name
Pin No
VIB_DRV
28
The motor is driven by an exclusive circuit, and a reference circuit design is shown below.
SC20-WL_Hardware_Design
I/O
Description
AI
General purpose ADC
AI
Input voltage sense
AI
Battery temperature detection
I/O
Description
PO
Motor drive
Smart Wi-Fi Module Series
SC20-WL Hardware Design
Comment
Max input voltage is 1.7V
Max input voltage is 4.5V
Internal pull-up.
Externally connect to GND with a
47K NTC thermistor.
Comment
Connected to the negative terminal
of motor
46 / 81
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