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30 DS691F2

CS4350

8.3.3 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.

8.3.4 ATAPI Channel Mixing and Muting (ATAPI[3:0]) Bits 3-0

Default = 1001 - AOUTA=aL, AOUTB=bR (Stereo)

Function:

The CS4350 implements the channel mixing functions of the ATAPI CD-ROM specification. Refer to

Table 14 and Figure 22 for additional information.

Table 14. ATAPI Decode

ATAPI_A1 ATAPI_A0 ATAPI_B1 ATAPI_B0 AOUTA AOUTB

0 0 0 0 MUTE MUTE

0001 MUTE bR

0010 MUTE bL

0 0 1 1 MUTE b[(L+R)/2]

0100 aR MUTE

0101 aR bR

0 1 1 0 aR bL

0 1 1 1 aR b[(L+R)/2]



A Channel

Volume

Control

AoutA

AoutB

Left Channel

Audio Data

Right Channel

Audio Data

B Channel

Volume

Control

MUTE

Figure 22. ATAPI Block Diagram

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 36 37 38

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Cirrus-logic CS4350 Manuale Utente Pagina 30