Analog Audio Adc Input Selection; Analog Audio Mux Output Selection; Figure 115: Audio Codec Mux Output Hardware Configuration - Analog Devices ADV7850 Hardware Manual

Analog Audio ADC Input Selection

11.2.1
The ADV7850 audio mux has five stereo pairs of analog audio inputs.
inputs will be available on the HDMI transmitter. The HDMI transmitter must be configured as required for this audio content (refer to
Section 13).
adc_input_mux[2:0], Addr 5C (audio_codec), Address 0x00[2:0]
This control is used to set the ADC input mux options.
Function
adc_input_mux[2:0]
000
001 
010
011
100
101
Others

Analog Audio Mux Output Selection

11.2.2
The ADV7850 audio mux has one stereo analog audio output.
inputs will be available on the stereo analog audio output. Using these controls, it is also possible to achieve mono in to stereo out
functionality. The audio mux output is enabled using muxout_en.
The ADV7850 audio codec provides a stereo output mux. The mux output hardware configuration is shown in
10 uF capacitors are aluminium electrolytic capacitors.
The mux provides a 1 V rms output signal. If the mux output is used on a SCART output, an external line driver is required to restore the
mux output signals to the SCART specification of 2.8 V rms.
muxout_en, Addr 5C (Audio Codec), Address 0x2C[0]
This control is used to enable the audio mux output.
Rev. A May 2012
Description
No source
AUXIN1
AUXIN2
AUXIN3
AUXIN4
AUXIN5
Reserved

Figure 115: Audio Codec Mux Output Hardware Configuration

adc_input_mux[2:0]
mux_out_l_sel[3:0] and mux_out_r_sel[3:0]
334
selects which stereo pair of analog audio
select which analog audio
Figure 115. Note that the
ADV7850