CS4228

DS307PP1

21

DAC Mute1 Control

Address 0x04

MUT6 - MUT1

Mute control for DAC6 - DAC1 respectively. When asserted, the corresponding DAC is digitally

attenuated to its maximum value (90.5 dB). When deasserted, the corresponding DAC attenu-

tation value returns to the value stored in the corresponding Digital Volume Control register. The

attenuation value is ramped up and down at the rate specified by RMP1:0.

0 -

Normal output level

*1 -

Selected DAC output fully attenuated.

RMP1:0

Attenuation ramp rate.

*0 -

0.5dB change per 4 LRCKs

1 -

0.5dB change per 8 LRCKs

2 -

0.5dB change per 16 LRCKs

3 -

0.5dB change per 32 LRCKs

DAC Mute2 Control

Address 0x05

MUTEC

Controls the MUTEC pin

*0 -

Normal operation

1 -

MUTEC pin asserted low

MUTCZ

Automatically asserts the MUTEC pin on consecutive zeros. When enabled, 512 consecutive

zeros on all six DAC inputs will cause the MUTEC pin to be asserted low. A single non-zero

value on any DAC input will cause the MUTEC pin to deassert.

*0 -

Disabled

1 -

Enabled

HMUTE56/34/12

Hard mute the corresponding DAC pair. When asserted, zero data is sent to the corresponding

DAC pair causing an instantaneous mute. To prevent high frequency transients on the outputs,

a DAC pair should be fully attenuated by asserting the corresponding MUT6-MUT1 bits in the

DAC Mute Control register or by writing 0xFF to the corresponding Digital Volume Control reg-

isters before asserting HMUTE.

*0 -

Normal operation

1 -

DAC pair is muted

765

4321

0

MUT6

MUT5

MUT4

MUT3

MUT2

MUT1

RMP1

RMP0

111

1110

0

765

4321

0

MUTEC

MUTCZ

RESERVED

HMUTE56

HMUTE34

HMUTE12

RESERVED

000

0000

0