Audio Interfaces - Quectel SC200L Series Hardware Design

3.20. Audio Interfaces

The module provides three analog input channels and three analog output channels. The following table
shows the pin definition.
Table 26: Pin Definition of Audio Interfaces
Pin Name Pin No.
MIC1_P 4
MIC1_N 5
MIC2_P 6
MIC2_N 148
MIC_BIAS2 149
MIC3_P 152
MIC3_N 151
MIC_BIAS1 147
EAR_P 8
EAR_N 9
SPK_P 10
SPK_N 11
HPH_R 136
HPH_REF 137
HPH_L 138
HS_DET 139
HPMIC_DET 150
SC200L_Series(Dual-band Wi-Fi)_Hardware_Design
I/O Description
AI Microphone input for channel 1 (+)
AI Microphone input for channel 1 (-)
AI Microphone input for headset (+)
AI Microphone input for headset (-)
PO Microphone bias voltage 2
AI Microphone input for channel 2 (+)
AI Microphone input for channel 2 (-)
PO Microphone bias voltage 1
AO Earpiece output (+)
AO Earpiece output (-)
AO Speaker output (+)
AO Speaker output (-)
AO Headphone right channel output
AO Headphone reference ground
AO Headphone left channel output
AI Headset insertion detect
AI Headphone microphone detect
Smart Module Series
Comment
Vmin = 2.20 V
Vmax = 3.00 V
Vnom = 2.80 V
Vmin = 2.20 V
Vmax = 3.00 V
Vnom = 2.50 V
If it is not used, connect it
to ground.
High level by default.
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