WM8580 datasheet(83/97 Pages) WOLFSON

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Production Data

WM8580

PD Rev 4.3 August 2007

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

Attenuation

DACR 3

19h

UPDATE

Not latched

Controls simultaneous update of all Attenuation Latches

0 = Store RDA3 in intermediate latch (no change to output)

1 = Apply RDA3 and update attenuation on all channels

7:0

MASTDA[7:0]

11111111

(0dB)

Digital Attenuation control for all DAC channels in 0.5dB steps.

See Table 23

R28

Master Digital

Attenuation

1Ch

UPDATE

Not latched

Controls simultaneous update of all Attenuation Latches

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

1 = Apply gain and update attenuation on all channels

AMUTEL

ADC Mute select

0 = Normal Operation

1 = mute ADC left

AMUTER

ADC Mute select

0 = Normal Operation

1 = mute ADC right

AMUTEALL

ADC Mute select

0 = Normal Operation

1 = mute both ADC channels

ADCOSR

ADC oversample rate select

0 = 128/64 x oversampling

1 = 64/32 x oversampling

ADCHPD

ADC high-pass filter disable:

0 = high-pass filter enabled

1 = high-pass filter disabled

7:5

ADCRATE[2:0]

010

ADC Rate Control (only used when the S/PDIF Transmitter is the

only interface sourcing the ADC)

000 = 128fs

001 = 192fs

010 = 256fs

011 = 384fs

100 = 512fs

101 = 768fs

110 = 1152fs

R29

ADC

Control 1

1Dh

VMIDSEL

VMID Impedance Selection

0 = High impedance, power saving

1 = Low impedance, fast power-on

1:0

TXSRC[1:0]

S/PDIF Transmitter Data Source

00 = S/PDIF received data (see REAL_THROUGH)

01 = ADC digital output data.

10 = Secondary Audio Interface

11 = Audio Interface received data

OVWCHAN

Only used if TXSRC==00. Overwrites the ‘through-path’ Channel

Bit with values determined by the channel-bit control registers.

0 = Channel data equal to recovered channel data.

1 = Channel data taken from channel status registers.

R30

SPDTXCHAN 0

1Eh

REAL_

THROUGH

S/PDIF Through Mode Control

0 = SPDIFOP pin sources output of S/PDIF Transmitter

1 = SPDIFOP pins sources output of S/PDIF IN Mux

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