Sensor Interfaces; Audio Interfaces - Quectel Smart LTE Module Series Hardware Design

3.22. Sensor Interfaces

SC650T module supports communication with sensors via I2C interface, and it supports various sensors
such as acceleration sensor, gyroscopic sensor, compass, optical sensor, temperature sensor.
Table 25: Pin Definition of Sensor Interfaces
Pin Name
SENSOR_I2C_SCL
SENSOR_I2C_SDA
GPIO_43
GPIO_44
GPIO_42
GPIO_45

3.23. Audio Interfaces

SC650T module provides two analog input channels, two analog output channels and two digital input
channels. The following table shows the pin definition.
Table 26: Pin Definition of Audio Interfaces
Pin Name Pin No.
DMIC1_DATA 45
DMIC1_CLK 46
DMIC2_DATA 168
DMIC2_CLK 169
MIC_BIAS1 44
MIC_BIAS2 233
SC650T_Hardware_Design
Pin No. I/O Description
131 OD I2C clock signal of external sensor
132 OD I2C data signal of external sensor
253 DI Interrupt signal of optical sensor
Interrupt signal of direction sensor
254 DI
(compass)
252 DI Interrupt signal of acceleration sensor
255 DI Interrupt signal of gyroscopic sensor
I/O Description
DI Digital microphone1 data
DO Digital microphone1 clock
DI Digital microphone2 data
DO Digital microphone2 clock
AO Microphone bias voltage
AO Microphone bias voltage
Smart LTE Module Series
SC650T Hardware Design
Comment
Comment
Dias voltage for
DMIC1
Dias voltage for
AMIC2
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