Smart Module Series
SC206E_Series_Hardware_Design 63 / 115
3.22. 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
⚫ The module offers three audio input channels.
⚫ The output voltage range of MIC_BIAS1 is programmable between 1.6 V and 2.85 V, and the
maximum output current is 3 mA. MIC_BIAS3 supports 1.8 V pull-up output only and is not
programmable.
⚫ The earpiece interface uses differential output.
Bias voltage 1 output for
microphone
The rated output current is 3 mA.
Microphone input for channel 1 (+)
Microphone input for channel 1 (-)
Microphone input for headset (+)
Microphone input for channel 3 (+)
Microphone input for channel 3 (-)
Bias voltage 3 output for
microphone
The rated output current is 3 mA.
The output voltage is fixed to 1.8 V
and cannot be adjusted.
Audio line differential output (+)
The typical output voltage is 2 Vrms.
Audio line differential output (-)
Headphone right channel output
Headphone reference ground
Headphone left channel output
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