WM8771 datasheet(35/44 Pages) WOLFSON

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WM8771

PP Rev 2.0 December 2001

10010

Phase swaps

7:0

PHASE

00000000

Controls phase of DAC outputs

0: Sets non inverted output phase

1: inverts phase of DAC output

DZCEN

DAC Digital Volume Zero Cross Enable:

0: Zero Cross detect disabled

1: Zero Cross detect enabled

ATC

Attenuator Control

0: All DACs use attenuations as programmed.

1: Right channel DACs use corresponding left DAC

attenuations

IZD

Infinite zero detection circuit control and automute control

0: Infinite zero detect disabled

1: Infinite zero detect enabled

DAC Output Control

PL[3:0]

Left

Output

Right

Output

PL[3:0]

Left

Output

Right

Output

0000

Mute

1000

Mute

Right

0001

Left

Mute

1001

Left

Right

0010

Right

Mute

1010

Right

0011

(L+R)/2

Mute

1011

(L+R)/2

Right

0100

Mute

Left

1100

Mute

(L+R)/2

0101

Left

1101

Left

(L+R)/2

0110

Right

Left

1110

Right

(L+R)/2

10011

DAC Control

7:4

PL[3:0]

1001

0111

(L+R)/2

Left

1111

(L+R)/2

3:0

DMUTE[3:0]

0000

DAC channel soft mute enables:

0: mute disabled

1: mute enabled

MUTEALL

DAC channel master soft mute. Mutes all DAC channels:

0: mute disabled

1: mute enabled

10100

DAC and

REC Mute

7:5

RECEN[2:0]

000

REC output enable

0 : REC outputs muted

1: REC outputs enabled

7:4

DZFM

0000

Selects the ouput for ZFLG1 and ZFLG2 pins (see Table 9).

1: indicates 1024 consecutive zero input samples on the

channels selected

0: indicates at least one of selected channels has non

zero sample in last 1024 inputs

10101

DAC Control

3:0

DEEMP

0000

De-emphasis mode select:

0 : Normal Mode

1: De-emphasis Mode

1:0

FMT[1:0]

Interface format select

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