Cirrus Logic CS4360 - Manual (Page 32)

CS4360
32 DS517F2
6.3.1 ATAPI CHANNEL MIXING AND MUTING (ATAPI) BIT 0-3
Default = 1001 - AOUTAx = L, AOUTBx = R (Stereo)
Function:
The CS4360 implements the channel mixing functions of the ATAPI CD-ROM specification. Refer to
Table 9 and Figure 22 for additional information.
Note: All mixing functions occur prior to the digital volume control. Mixing only occurs in channel pairs.
ATAPI3 ATAPI2 ATAPI1 ATAPI0 AOUTAx AOUTBx
0 0 0 0 MUTE MUTE
0 0 0 1 MUTE R
0 0 1 0 MUTE L
0 0 1 1 MUTE [(L+R)/2]
0 1 0 0 R MUTE
0 1 0 1 R R
0 1 1 0 R L
0 1 1 1 R [(L+R)/2]
1 0 0 0 L MUTE
1 0 0 1 L R
1 0 1 0 L L
1 0 1 1 L [(L+R)/2]
1 1 0 0 [(L+R)/2] MUTE
1 1 0 1 [(L+R)/2] R
1 1 1 0 [(L+R)/2] L
1 1 1 1 [(L+R)/2] [(L+R)/2]
Table 9. ATAPI Decode
Σ
A Channel
Volume
Control
AoutA
AoutB
Left Channel
Audio Data
Right Channel
Audio Data
B Channel
Volume
Control
& Mute
& Mute
Figure 22. ATAPI Block Diagram