CS4349
8.3.3
8.3.4
Invert Signal Polarity (INVERT_B) Bit 5
Function:
When set to 1, this bit inverts the signal polarity of channel B.
When set to 0 (default), this function is disabled.
This function is only available for Left Justified, Right Justified 16, and Right Justified 24 data formats.
ATAPI Channel Mixing and Muting (ATAPI[3:0]) Bits 3-0
Default = 1001 - AOUTA = aL, AOUTB = bR (Stereo)
Function:
The CS4349 implements the channel mixing functions of the ATAPI CD-ROM specification. Refer to
Table 4 and Figure 21 for additional information.
A Channel
Volume
Control
Left Channel
Audio Data
MUTE
AoutA
Σ
Σ
B Channel
Volume
Control
Right Channel
Audio Data
MUTE
AoutB
Figure 21. ATAPI Block Diagram
ATAPI_A1 ATAPI_A0 ATAPI_B1 ATAPI_B0
AOUTA
AOUTB
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
MUTE
MUTE
MUTE
MUTE
aR
MUTE
bR
bL
b[(L+R)/2]
MUTE
bR
aR
aR
bL
aR
b[(L+R)/2]
Table 4. ATAPI Decode
DS782F1
31
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