CS4360 datasheet(16/36 Pages) CIRRUS

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CS4360

DS517PP1

4.3.1

ATAPI CHANNEL MIXING AND MUTING (ATAPI)

Default = 1001 - AOUTAx = L, AOUTBx = R (Stereo)

Function:

The CS4360 implements the channel mixing functions of the ATAPI CD-ROM specification. Refer to

Table 2 and Figure 24 for additional information.

Note:

All mixing functions occur prior to the digital volume control. Mixing only occurs in channel pairs.

4.4

Volume Control (addresses 06h - 0Bh)

4.4.1

MUTE (MUTE)

Default = 0

0 - Disabled

1 - Enabled

Function:

The Digital-to-Analog converter output will mute when enabled. The quiescent voltage on the output

will be retained. The muting function is effected, similar to attenuation changes, by the Soft and Zero

Cross bits. The MUTEC pin will go active during the mute period if the Mute function is enabled for

both channels in the pair.

ATAPI3

ATAPI2

ATAPI1

ATAPI0

AOUTAx

AOUTBx

0000

MUTE

0001

MUTE

0010

MUTE

0011

MUTE

[(L+R)/2]

0100

MUTE

0101

0110

0111

[(L+R)/2]

1000

MUTE

1001

1010

1011

[(L+R)/2]

1100

[(L+R)/2]

MUTE

1101

[(L+R)/2]

1110

[(L+R)/2]

1111

[(L+R)/2]

Table 2. ATAPI Decode

765

4321

xx_MUTE

xx_VOL6

xx_VOL5

xx_VOL4

xx_VOL3

xx_VOL2

xx_VOL1

xx_VOL0

000

0100

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