Cirrus Logic CS4351 - Manual (Page 26)

26 DS566F1
CS4351
6.3.4 ATAPI Channel Mixing and Muting (ATAPI3:0) Bits 3-0
Default = 1001 - AOUTA=aL, AOUTB=bR (Stereo)
Function:
The CS4351 implements the channel mixing functions of the ATAPI CD-ROM specification. Refer to
Table 8 and Figure 12 for additional information.
ATAPI3 ATAPI2 ATAPI1 ATAPI0 AOUTA AOUTB
0 0 0 0 MUTE MUTE
0 0 0 1 MUTE bR
0 0 1 0 MUTE bL
0 0 1 1 MUTE b[(L+R)/2]
0 1 0 0 aR MUTE
0 1 0 1 aR bR
0 1 1 0 aR bL
0 1 1 1 aR b[(L+R)/2]
1 0 0 0 aL MUTE
1 0 0 1 aL bR
1 0 1 0 aL bL
1 0 1 1 aL b[(L+R)/2]
1 1 0 0 a[(L+R)/2] MUTE
1 1 0 1 a[(L+R)/2] bR
1 1 1 0 a[(L+R)/2] bL
1 1 1 1 a[(L+R)/2] b[(L+R)/2]
Table 8. ATAPI Decode
Σ Σ
A Channel
Volume
Control
AoutA
AoutB
Left Channel
Audio Data
Right Channel
Audio Data
B Channel
Volume
Control
MUTE
MUTE
Figure 12. ATAPI Block Diagram