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Smart LTE Module Series
SC20 Hardware Design
SC20_Hardware_Design 55 / 130
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.
3.17. Motor Drive Interface
The pin of motor drive interface is listed below.
Table 20: Pin Definition of Motor Drive Interface
The motor is driven by an exclusive circuit, and a reference circuit design is shown below.
VIB_DRV
1
4
3V3
Module
VIB+
Motor
VIB-
1uF
NM
D1
C1 C2
Figure 20: Reference Circuit for Motor Connection
When the motor stops, the redundant electricity can be discharged from the circuit loop formed by diodes,
thus avoiding component damages.
Pin Name
Pin No
I/O Description
Comment
VIB_DRV
28
PO
Motor drive
Connected to the negative terminal of the motor
NOTE