Audio Interfaces - Quectel SC20 Series Hardware Design

gravity sensor, and gyroscopic sensors.
Verified sensor models by Quectel include: BST-BMA223, STK3311-WV, MPU-6881 and MMC35240PJ.
Table 27: Pin Definition of Sensor Interfaces
Pin Name
SENSOR_I2C_SCL
SENSOR_I2C_SDA
GPIO_88
GPIO_89
GPIO_94
GPIO_36
GPIO_65
GPIO_96

3.22. Audio Interfaces

SC20 series provides two analog input channels and three analog output channels. The following table
shows the pin definition.
Table 28: Pin Definition of Audio Interfaces
Pin Name Pin No.
MIC1P 4
MIC_GND 5
MIC2P 6
EARP 8
EARN 9
SC20_Series_Hardware_Design
Pin No. I/O Description
91 OD I2C clock for external sensor
92 OD I2C data for external sensor
99 DI Gyroscope sensor interrupt 2
100 DI Gyroscope sensor interrupt 1
107 DI Proximity sensor interrupt
108 DI Compass sensor interrupt
109 DI Gravity sensor interrupt 2
110 DI Gravity sensor interrupt 1
I/O Description
AI Microphone input for channel 1 (+)
Microphone reference ground
AI Microphone input for headset (+)
AO Earpiece output (+)
AO Earpiece output (-)
Smart Module Series
Comment
1.8 V power domain.
1.8 V power domain.
Default configuration.
Including but not
limited to these GPIO
pins.
Comment
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