ALC5642-VF
Datasheet
7.6. Audio Data Path
The ALC5642 provides 4-channel analog DACs for playback and 2-channel analog ADCs for recording.
7.6.1. 2 Analog ADCs with 4-Channel Record Path
There are two analog ADCs and with up to 4-channel recording path. You can use two analog
microphones pass to analog ADCs and two digital microphones to reach 4-channel recording. Or use two
digital microphone interfaces to reach 4-channel recording. These 4-channel data need to pass to 2-I2S
interface, maybe two channels for one I2S interface or mono channel for one I2S interface.
The full scale input of analog ADC is around 0.55Vrms. In order to save power, the left and right analog
ADC can be powered down separately by setting pow_adc_l (MX-61[2]) and pow_adc_r (MX-61[1]).
And the volume control of the stereo ADC is also separately controlled by ad_gain_l (MX-1C[14:8]) and
ad_gain_r (MX-1C[6:0]).
DMIC1_L
DMIC2_L
DAC_MIXL
CH1
DAC_MIXL
Analog ADC_L
DMIC1_R
DMIC2_R
IF1_ADC
I2S1
DAC_MIXR
CH2
DAC_MIXR
Analog ADC_R
DMIC1_L
DMIC2_L
Mono_DAC_MIXL
CH3
Mono_DAC_MIXL
Analog ADC_L
DMIC1_R
IF2_ADC
I2S2
DMIC2_R
Mono_DAC_MIXR
CH4
Mono_DAC_MIXR
Analog ADC_R
Figure 15. 4-Channel Recording Path
Multi-Channel Audio Hub/CODEC with embedded Voice
DSP and SounzRealTM Digital Sound Effect
25
Rev. 0.93
REALTEK [ Realtek Semiconductor Corp. ]
