Datasheet

11.6. Stereo ADC
The stereo ADC is used for recording stereo sound. The sample rate of the stereo ADC can not be
independent of DAC sample rate. In other words, the stereo ADC and DAC must work at a same sample
rate. The sample rate is configured by the register ADDA_FS_I2S1.
In order to save power, the left and right analog ADC part can be enabled/disabled separately by setting
register ADC_APC_CTRL Bit15 & Bit11. The digital ADC part can be enabled/disabled by
ADC_DIG_CTRL Bit15.
The volume control of the stereo ADC is set via register ADC_APC_CTRL Bit14:12 & ADC_APC_CTRL
Bit10:8.
11.7. Stereo DAC
The stereo DAC sample rate is the same as the stereo ADC. The sample rate is configured by the register
ADDA_FS_I2S1.
In order to save power, the left and right DAC can be enabled/disabled separately by setting register
OMIXER_DACA_CTRL Bit15:14. The digital DAC part can be enabled/ disabled by DAC_DIG_CTRL
Bit15.
11.8. Mixer
The Codec supports three series of mixers for all function requirements:

2 channels DAC Output mixers

2 channels ADC Record mixers

Digital mixers
11.8.1. DAC Output Mixers
The output mixer is used to drive analogue output, including headphone, earpiece, speaker,lineout. The
following signals can be mixed into the output mixer:
 LINEINL/R
 MIC1P/N,MIC2P/N
 Stereo DAC output
11.8.2. ADC Record Mixers
The ADC record mixer is used to mix analog signals as input to the Stereo ADC for recording. The
following signals can be mixed into the output mixer:

LINEINL/R

MIC1P/N,MIC2P/N

Stereo DAC output