CS42438-DMZ datasheet(47/61 Pages) CIRRUS

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DS646F2

CS42438

7.7.4

Mute ADC Serial Port (MUTE ADC_SP)

Default = 0

0 - Disabled

1 - Enabled

Function:

When enabled, the ADC Serial Port will be muted.

7.8

DAC Channel Mute (Address 07h)

7.8.1

Independent Channel Mute (AOUTX_MUTE)

Default = 0

0 - Disabled

1 - Enabled

Function:

The respective Digital-to-Analog converter outputs of the CS42438 will mute when enabled. The quies-

cent voltage on the outputs will be retained. The muting function is affected by the DAC Soft and Zero

Cross bits (DAC_SZC[1:0]).

7.9

AOUTX Volume Control (Addresses 08h- 0Fh)

7.9.1

Volume Control (AOUTX_VOL[7:0])

Default = 00h

Function:

The AOUTx Volume Control registers allow independent setting of the signal levels in 0.5 dB increments

from 0 dB to -127.5 dB. Volume settings are decoded as shown in Table 8. The volume changes are im-

plemented as dictated by the Soft and Zero Cross bits (DAC_SZC[1:0]). All volume settings less than -

127.5 dB are equivalent to enabling the AOUTx_MUTE bit for the given channel.

432

AOUT8_MUTE

AOUT7_MUTE

AOUT6_MUTE

AOUT5_MUTE

AOUT4_MUTE

AOUT3_MUTE

AOUT2_MUTE

AOUT1_MUTE

432

AOUTx_VOL7

AOUTx_VOL6

AOUTx_VOL5

AOUTx_VOL4

AOUTx_VOL3

AOUTx_VOL2

AOUTx_VOL1

AOUTx_VOL0

Binary Code

Volume Setting

00000000

0 dB

00101000

-20 dB

01010000

-40 dB

01111000

-60 dB

10110100

-90 dB

Table 8. Example AOUT Volume Settings

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