Quectel SC20 Series - Audio Interfaces

Smart Module Series
SC20_Series_Hardware_Design 64 / 133
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
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. I/O Description Comment
SENSOR_I2C_SCL 91 OD I2C clock for external sensor 1.8 V power domain.
SENSOR_I2C_SDA 92 OD I2C data for external sensor 1.8 V power domain.
GPIO_88 99 DI Gyroscope sensor interrupt 2
Default configuration.
Including but not
limited to these GPIO
pins.
GPIO_89 100 DI Gyroscope sensor interrupt 1
GPIO_94 107 DI Proximity sensor interrupt
GPIO_36 108 DI Compass sensor interrupt
GPIO_65 109 DI Gravity sensor interrupt 2
GPIO_96 110 DI Gravity sensor interrupt 1
Pin Name Pin No. I/O Description Comment
MIC1P 4 AI Microphone input for channel 1 (+)
MIC_GND 5 Microphone reference ground
MIC2P 6 AI Microphone input for headset (+)
EARP 8 AO Earpiece output (+)
EARN 9 AO Earpiece output (-)