CS4399 datasheet(84/111 Pages) CIRRUS

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DS1113F1

CS4399

7.4 DSD Registers

7.4.1

DSD Volume B

Address 0x70000

R/W

76543210

DSD_VOLUME_B

Default

01111000

Bits

Name

Description

7:0

DSD_

VOLUME_B

Digital volume control registers for DSD processor channel B. It allows independent control of the signal level in 1/2 dB

increments from 0 dB. Volume settings are decoded as shown below. The volume changes are dictated by the DSD_

SZC bit. The same condition applies to DSD_VOLUME_A setting.

0000 0000 0 dB

0000 0001 –0.5 dB

...

01111000 –60 dB (Default)

...

1111 1110 –127 dB

1111 1111 Digital mute

7.4.2

DSD Volume A

Address 0x70001

R/W

76543210

DSD_VOLUME_A

Default

01111000

Bits

Name

Description

7:0

DSD_

VOLUME_A

Digital volume control registers for channel A. See DSD_VOLUME_B for description.

7.4.3

DSD Processor Path Signal Control 1

Address 0x70002

R/W

76543210

—

DSD_VOL_

BEQA

DSD_SZC

—

DSD_AMUTE DSD_AMUTE_

BEQA

DSD_MUTE_A DSD_MUTE_B

Default

10101000

Bits

Name

Description

7—

Reserved

6DSD_VOL_

BEQA

DSD_VOLUME_B equals DSD_VOLUME_A.

0 (Default) Volume setting of both channels in DSD processor are controlled independently

1 Volume setting of both channels are controlled by DSD_VOLUME_A. DSD_VOLUME_B is ignored

DSD_SZC

Soft ramp control.

0 Immediate change

1 (Default) Soft ramp

4—

Reserved

DSD_AMUTE DSD auto mute.

0 Function disabled

1 (Default) Mute occurs after reception of 256 repeated 8-bit DSD mute patterns. A single bit not fitting the repeated

pattern releases the mute. Detection and muting is done independently for each channel.

2DSD_

AMUTE_

BEQA

DSD Processor Auto mute channel B equals channel A.

0 (Default) Function disabled

1 Only mute when both channels AMUTE conditions are detected

1DSD_MUTE_

DSD Processor Channel A mute.

0 (Default) Function is disabled

1 Channel output is muted. Muting function is affected by the DSD_SZC bit

0DSD_MUTE_

DSD Processor Channel B mute.

0 (Default) Function is disabled.

1 Channel output is muted. Muting function is affected by the DSD_SZC bit.

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