Product Info

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