WM8581 datasheet(85/94 Pages) WOLFSON

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WM8581

PP Rev 1.0 March 2006

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

UPD_NON_AUDIO

NON_AUDIO update signal

0 = INTB not caused by update to NON_AUDIO flag

1 = INTB caused by update to NON_AUDIO flag

UPD_CPY_N

CPY_N update signal

0 = INTB not caused by update to CPY_N flag

1 = INTB caused by update to CPY_N flag

UPD_DEEMPH

DEEMPH update signal

0 = INTB not caused by update to DEEMPH flag

1 = INTB caused by update to DEEMPH flag

UPD_REC_FREQ

REC_FREQ update signal

0 = INTB not caused by update to REC_FREQ flag

1 = INTB caused by update to REC_FREQ flag

CON/PRO

0 = Consumer Mode

1 = Professional Mode

The WM8581 is a consumer mode device. Detection of

professional mode may give erroneous behaviour.

AUDIO_N

Recovered S/PDIF Channel status bit 1.

0 = Data word represents audio PCM samples.

1 = Data word does not represent audio PCM samples.

CPY_N

0 = Copyright is asserted for this data.

1 = Copyright is not asserted for this data.

DEEMPH

0 = Recovered S/PDIF data has no pre-emphasis.

1 = Recovered S/PDIF data has pre-emphasis.

5:4

Reserved

Reserved for additional de-emphasis modes.

R44

SPDRXCHAN 1

7:6

CHSTMODE

[1:0]

00 = Only valid mode for consumer applications.

R45

SPDRXCHAN 2

2Dh

7:0

CATCODE

[7:0]

Category Code. Refer to S/PDIF specification for details.

00h indicates “general” mode.

3:0

SRCNUM

[3:0]

Indicates number of S/PDIF source.

R46

SPDRXCHAN 3

2Eh

7:4

CHNUM1[3:0]

Channel number for channel 1.

0000 = Take no account of channel number (channel 1 defaults to

left DAC)

0001 = channel 1 to left channel

0010 = channel 1 to right channel

3:0

FREQ[3:0]

Sampling Frequency. See S/PDIF specification for details.

0001 = Sampling Frequency not indicated.

R47

SPDRXCHAN 4

2Fh

5:4

CLKACU[1:0]

Clock Accuracy of received clock.

00 = Level II

01 = Level I

10 = Level III

11 = Interface frame rate not matched to sampling frequency.

MAXWL

Maximum Audio sample word length

0 = 20 bits

1 = 24 bits

Audio Sample Word Length.

000: Word Length Not Indicated

RXWL[2:0]

MAXWL==1

MAXWL==

001

20 bits

16 bits

010

22 bits

18 bits

R48

SPDRXCHAN 5

30h

3:1

RXWL[2:0]

100

23 bits

19 bits

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