Smart LTE Module Series
SC650T Hardware Design
SC650T_Hardware_Design 74 / 131
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
Pin No.
I/O
Description
Comment
SENSOR_I2C_SCL
131
OD
I2C clock signal of external sensor
SENSOR_I2C_SDA
132
OD
I2C data signal of external sensor
GPIO_43
253
DI
Interrupt signal of optical sensor
GPIO_44
254
DI
Interrupt signal of direction sensor
(compass)
GPIO_42
252
DI
Interrupt signal of acceleration sensor
GPIO_45
255
DI
Interrupt signal of gyroscopic sensor
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.
I/O
Description
Comment
DMIC1_DATA
45
DI
Digital microphone1 data
DMIC1_CLK
46
DO
Digital microphone1 clock
DMIC2_DATA
168
DI
Digital microphone2 data
DMIC2_CLK
169
DO
Digital microphone2 clock
MIC_BIAS1
44
AO
Microphone bias voltage
Dias voltage for
DMIC1
MIC_BIAS2
233
AO
Microphone bias voltage
Dias voltage for
AMIC2