CS42406 Datasheet, PDF (43/50 Pages) Cirrus Logic – 24-BIT, 192kHz 2-IN 6-OUT AUDIO CODEC

CS42406
6.3.1 ATAPI CHANNEL MIXING AND MUTING (ATAPI) BIT 3-0
Default = 1001 - AOUTAx = L, AOUTBx = R (Stereo)
Function:
The CS42406 implements the channel mixing functions of the ATAPI CD-ROM specification. Refer
to Table 8 and Figure 41 for additional information.
Note: All mixing functions occur prior to the digital volume control. Mixing only occurs in channel pairs.
ATAPI3
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
ATAPI2
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
ATAPI1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
ATAPI0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
AOUTAx
MUTE
MUTE
MUTE
MUTE
R
R
R
R
L
L
L
L
[(L+R)/2]
[(L+R)/2]
[(L+R)/2]
[(L+R)/2]
Table 8. ATAPI Decode
AOUTBx
MUTE
R
L
[(L+R)/2]
MUTE
R
L
[(L+R)/2]
MUTE
R
L
[(L+R)/2]
MUTE
R
L
[(L+R)/2]
Left Channel
Audio Data
A Channel
Volume
Control
& Mute
AoutA
Σ
Right Channel
Audio Data
B Channel
Volume
Control
& Mute
Figure 41. ATAPI Block Diagram
AoutB
43