WM8522 datasheet(31/39 Pages) WOLFSON

31 / 39 page

Pre-Production

WM8522

PP Rev 3.1 May 2006

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

7:0

LDA1[7:0]

11111111

(0dB)

Digital Attenuation data for Left channel DACL1 in 0.5dB steps. See

Table 16

(00h)

Digital

Attenuation

DACL1

UPDATE

Not latched

Controls simultaneous update of all Attenuation Latches

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

1: Store LDA1 and update attenuation on all channels

7:0

RDA1[6:0]

11111111

(0dB)

Digital Attenuation data for Right channel DACR1 in 0.5dB steps.

See Table 16.

(01h)

Digital

Attenuation

DACR1

UPDATE

Not latched

Controls simultaneous update of all Attenuation Latches

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

1: Store RDA1 and update attenuation on all channels.

MUTEALL

Soft Mute Select:

0 : Normal operation

1: Soft mute all channels

DEEMPALL

DEEMPH Select:

0 : Normal operation

1: De-emphasis all channels

PDWN

Power Down all DAC’s Select:

0: All DACs enabled

1: All DACs disabled

ATC

Attenuator Control Mode:

0: Right channels use right attenuations

1: Right channels use left attenuations

IZD

IZD Enable

0 : Disable infinite zero mute

1: Enable infinite zero mute

PL[3:0]

Left Output

Right Output

0000

Mute

0001

Left

Mute

0010

Right

Mute

0011

(L+R)/2

Mute

0100

Mute

Left

0101

Left

0110

Right

Left

0111

(L+R)/2

Left

1000

Mute

Right

1001

Left

Right

1010

Right

1011

(L+R)/2

Right

1100

Mute

(L+R)/2

1101

Left

(L+R)/2

1110

Right

(L+R)/2

(02h)

DAC DEEMPH

8:5

PL[3:0]

1001

1111

(L+R)/2

(03h)

DAC Phase

1:0

FMT[1:0]

Interface Format Select:

00 : Right justified mode

01: Left justified mode

10: I

2S mode

11: DSP modes A or B

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