SC200L Hardware Design
SC200L_Hardware_Design
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3.20. Audio
Interface
SC200L module provides three analog input channels and three analog output channels. The following
table shows the pin definition.
Table 23: Pin Definition of Audio Interfaces
The module has three sets of audio inputs, including three sets of differential input channels
The output voltage range of two MIC_BIAS is programmable between 2.2V and 3.0V, and the
Pin Name
Pin No
I/O
Description
Comment
MIC1_P
4
AI
Main microphone input (+)
MIC1_N
5
AI
MIC reference ground
MIC2_P 6 AI
Headphone microphone
input (+)
MIC2_N 148
AI
Headphone microphone
input (-)
MIC_BIAS2
149
PO
Microphone bias voltage 2
MIC3_P 152
AI
Secondary microphone input
(+)
MIC3_N 151
AI
Secondary microphone input
(-)
MIC_BIAS1
147
PO
Microphone bias voltage 1
EAR_P
8
AO
Earpiece output (+)
EAR_N
9
AO
Earpiece output (-)
SPK_P
10
AO
Speaker output (+)
SPK_N
11
AO
Speaker output (-)
HPH_R 136
AO
Headphone right channel
output
HPH_REF 137 AO
Headphone reference
ground
No need to connect to
ground
HPH_L 138
AO
Headphone left channel
output
HS_DET 139
AI Headset
insertion detection
The default is high
HPMIC_DET 150 AI
Headphone microphone
detection
