WM8581 datasheet(85/100 Pages) WOLFSON

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Production Data

WM8581

PD Rev 4.0 April 2007

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R18

DAC

CONTROL

12h

7:0

PHASE [7:0]

11111111

Controls phase of DAC outputs

0 = inverted

1 = non-inverted

PHASE[0] = 0 inverts phase of DAC1L output

PHASE[1] = 0 inverts phase of DAC1R output

PHASE[2] = 0 inverts phase of DAC2L output

PHASE[3] = 0 inverts phase of DAC2R output

PHASE[4] = 0 inverts phase of DAC3L output

PHASE[5] = 0 inverts phase of DAC3R output

PHASE[6] = 0 inverts phase of DAC4L output

PHASE[7] = 0 inverts phase of DAC4R output

3:0

DMUTE[3:0]

0000

DAC channel soft mute enables

DMUTE[0] = 1, enable soft-mute on DAC1

DMUTE[1] = 1, enable soft-mute on DAC2

DMUTE[2] = 1, enable soft-mute on DAC3

DMUTE[3] = 1, enable soft-mute on DAC4

MUTEALL

DAC channel master soft mute. Mutes all DAC channels

0 = disable soft-mute on all DACs

1 = enable soft-mute on all DACs

DZCEN

DAC Digital Volume Zero Cross Enable

0 = Zero Cross detect disabled

1 = Zero Cross detect enabled

DACATC

Attenuator Control

0 = All DACs use attenuations as programmed.

1 = Right channel DACs use corresponding left DAC attenuations

R19

DAC

CONTROL

13h

MPDENB

MUTE pin decode enable

0 = MUTE activates soft-mute on DAC selected by DZFM

1 = MUTE activates softmute on all DACs

7:0

LDA1[7:0]

11111111

(0dB)

Digital Attenuation control for DAC1 Left Channel (DACL1) in

0.5dB steps. See Table 23

R20

DIGITAL

ATTENUATION

DACL 1

14h

UPDATE

Not latched

Controls simultaneous update of all Attenuation Latches

0 = Store LDA1 in intermediate latch (no change to output)

1 = Apply LDA1 and update attenuation on all channels

7:0

RDA1[7:0]

11111111

(0dB)

Digital Attenuation control for DAC1 Right Channel (DACR1) in

0.5dB steps. See Table 23

R21

DIGITAL

ATTENUATION

DACR 1

15h

UPDATE

Not latched

Controls simultaneous update of all Attenuation Latches

0 = Store RDA1 in intermediate latch (no change to output)

1 = Apply RDA1 and update attenuation on all channels

7:0

LDA2[7:0]

11111111

(0dB)

Digital Attenuation control for DAC2 Left Channel (DACL2) in

0.5dB steps. See Table 23

R22

DIGITAL

ATTENUATION

DACL 2

16h

UPDATE

Not latched

Controls simultaneous update of all Attenuation Latches

0 = Store LDA2 in intermediate latch (no change to output)

1 = Apply LDA2 and update attenuation on all channels

7:0

RDA2[7:0]

11111111

(0dB)

Digital Attenuation control for DAC2 Right Channel (DACR2) in

0.5dB steps. See Table 23

R23

DIGITAL

ATTENUATION

DACR 2

17h

UPDATE

Not latched

Controls simultaneous update of all Attenuation Latches

0 = Store RDA2 in intermediate latch (no change to output)

1 = Apply RDA2 and update attenuation on all channels

7:0

LDA3[7:0]

11111111

(0dB)

Digital Attenuation control for DAC3 Left Channel (DACL3) in

0.5dB steps. See Table 23

R24

DIGITAL

ATTENUATION

DACL 3

18h

UPDATE

Not latched

Controls simultaneous update of all Attenuation Latches

0 = Store LDA3 in intermediate latch (no change to output)

1 = Apply LDA3 and update attenuation on all channels

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