WM8771 datasheet(25/44 Pages) WOLFSON

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WM8771

PP Rev 2.0 December 2001

ADC OVERSAMPLING RATE SELECT

For ADC operation at 96kHz it is recommended that the user set the ADCOSR bit. This changes the

ADC signal processing oversample rate to 64fs.

BIT

LABEL

DEFAULT

DESCRIPTION

10111

ADC Oversampling Rate

ADCOSR

ADC oversampling rate select

0: 128x oversampling

1: 64x oversampling

MUTE MODES

The WM8771 has individual mutes for each of the four DAC channels. Setting MUTE for a channel

will apply a ‘soft’ mute to the input of the digital filters of the channel muted. The WM8770 has

individual mutes for each of the four DAC channels. Setting MUTE for a channel will apply a ‘soft’

mute to the input of the digital filters of the channel muted. DMUTE[0] mutes DAC channel 1,

DMUTE[1] mutes DAC channel 2, DMUTE[2] mutes DAC channel 3 & DMUTE[3] mutes DAC

channel 4.

BIT

LABEL

DEFAULT

DESCRIPTION

10100

DAC Mute

3:0

DMUTE[3:0]

DAC Soft Mute select

0 : Normal Operation

1: Soft mute enabled

Setting the MUTEALL register bit will apply a 'soft' mute to the input of all the DAC digital filters:

BIT

LABEL

DEFAULT

DESCRIPTION

10100

DAC Mute

MUTEALL

Soft Mute select

0 : Normal Operation

1: Soft mute all channels

Figure 21 Application and Release of Soft Mute

-2.5

-2

-1.5

-1

-0.5

0.5

1.5

0.001

0.002

0.003

0.004

0.005

0.006

Time(s)

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