PCM1691 datasheet(32/47 Pages) TI

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PCM1691

SBAS450 – OCTOBER 2008.............................................................................................................................................................................................. www.ti.com

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MUTDA8

MUTDA7

MUTDA6

MUTDA5

MUTDA4

MUTDA3

MUTDA2

MUTDA1

MUTDA[8:1] Soft Mute control

These bits are used to enable or disable the Soft Mute function for the corresponding DAC

outputs, VOUTx. The Soft Mute function is incorporated into the digital attenuators. When mute is

disabled (MUTDA[8:1] = 0), the attenuator and DAC operate normally. When mute is enabled by

setting MUTDA[8:1] = 1, the digital attenuator for the corresponding output is decreased from the

current setting to infinite attenuation. By setting MUTDA[8:1] = 0, the attenuator is increased to

the last attenuation level in the same manner as it is for decreasing levels. This configuration

reduces pop and zipper noise during muting of the DAC output. This Soft Mute control uses the

same resource of digital attenuation level setting. Mute control has priority over the digital

attenuation level setting.

Default value: 0000 0000.

MUTDA

Soft Mute control

xxxx xxx0

DAC1 Mute disabled

xxxx xxx1

DAC1 Mute enabled

xxxx xx0x

DAC2 Mute disabled

xxxx xx1x

DAC2 Mute enabled

xxxx x0xx

DAC3 Mute disabled

xxxx x1xx

DAC3 Mute enabled

xxxx 0xxx

DAC4 Mute disabled

xxxx 1xxx

DAC4 Mute enabled

xxx0 xxxx

DAC5 Mute disabled

xxx1 xxxx

DAC5 Mute enabled

xx0x xxxx

DAC6 Mute disabled

xx1x xxxx

DAC6 Mute enabled

x0xx xxxx

DAC7 Mute disabled

x1xx xxxx

DAC7 Mute enabled

0xxx xxxx

DAC8 Mute disabled

1xxx xxxx

DAC8 Mute enabled

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