WM8804 datasheet(59/66 Pages) WOLFSON

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Production Data

WM8804

PD Rev 4.1 September 2007

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

3:0

SRCNUM

[3:0]

0000

Source Number

Refer to S/PDIF specification (IEC 60958-3) for

full details.

Channel Number for Subframe 1

CHNUM1

Channel Status Bits[21:20]

Function

Do not use channel number

Send to Left Channel

Send to Right Channel

5:4

CHNUM1[1:0]

Do not use channel number

Channel Number for Subframe 2

CHNUM2

Channel Status Bits[23:22]

Function

Do not use channel number

Send to Left Channel

Send to Right Channel

R20

SPDTX3

14h

7:6

CHNUM2[1:0]

Do not use channel number

3:0

FREQ[3:0]

0001

Indicated Sampling Frequency

Refer to S/PDIF specification (IEC 60958-3) for

full details.

0001 = Sampling Frequency not indicated.

5:4

CLKACU[1:0]

Clock Accuracy of Transmitted Clock

00 = Level II

01 = Level I

10 = Level III

11 = Interface frame rate not matched to

sampling frequency.

TXSRC

S/PDIF Transmitter Data Source

0 = S/PDIF Received Data – SPDIFTXCLK

Source = CLK2

1 = Digital Audio Interface Received Data –

SPDIFTXCLK Source = MCLK Input/Output

Signal at MCLK Pin

R21

SPDTX4

15h

TXSTATSRC

S/PDIF Transmitter Channel Status Data

Source

0 = Received channel status data

1 = Transmit channel status registers

Note : Only used if TXSRC=0

MAXWL

Maximum Audio Sample Word Length

0 = 20 bits

1 = 24 bits

Audio Sample Word Length

Used with MAXWL to indicate Tx word length

000 = Word length not indicated

TXWL[2:0]

MAXWL==1

MAXWL==0

001

20 bits

16 bits

010

22 bits

18 bits

100

23 bits

19 bits

101

24 bits

20 bits

110

21 bits

17 bits

3:1

TXWL[2:0]

101

All other combinations reserved

R22

SPDTX5

16h

7:4

ORGSAMP

[3:0]

0000

Original Sampling Frequency

Refer to S/PDIF specification (IEC 60958-3) for

full details.

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