Product Info

Smart LTE Module Series
SC66 Hardware Design
SC66_Hardware_Design 29 / 118
4347
5662
8798
101112
125128
130133
135148
150159
160163
166170
173176
182193
195219
225243
257~323
Audio Interfaces
Pin Name
Pin No.
I/O
Description
DC Characteristics
Comment
MIC_BIAS
167
AO
Microphone bias
voltage
V
O
=1.6V~2.9V
MIC1_P
44
AI
Microphone positive
input for channel 1
MIC1_M
45
AI
Microphone
negative input for
channel 1
MIC_GND
168
Microphone
reference ground
If unused, it should
be connected to
GND
MIC2_P
46
AI
Microphone
Headset mic input