WM8804 datasheet(37/66 Pages) WOLFSON

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Production Data

WM8804

PD Rev 4.1 September 2007

ADDRESS

BIT

LABEL

CHANNEL

STATUS

BIT

DEFAULT

DESCRIPTION

3:0

FREQ[3:0]

27:24

0001

Indicated Sampling Frequency

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

for full details.

R16

RXCHAN4

10h

(read-only)

5:4

CLKACU[1:0]

29:28

Clock Accuracy of Received Clock

00 = Level II

01 = Level I

10 = Level III

11 = Interface frame rate not matched to

sampling frequency.

Table 43 S/PDIF Receiver Channel Status Register 4

ADDRESS

BIT

LABEL

CHANNEL

STATUS

BIT

DEFAULT

DESCRIPTION

MAXWL

Maximum Audio Sample Word Length

0 = 20 bits

1 = 24 bits

Note: see table in description of bits 3:1 of

this register,

Audio Sample Word Length

000: Word length not indicated

RXWL[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

RXWL[2:0]

35:33

000

All other combinations are reserved and

should not be used. See note 1.

R17

RXCHAN5

11h

(read-only)

7:4

ORGSAMP

[3:0]

39:36

0000

Original Sampling Frequency

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

for full details.

Table 44 S/PDIF Receiver Channel Status Register 5

Note 1: MAXWL and RXWL[2:0] bits in recovered channel status data are used to truncate digital audio

interface transmitted data. Truncation replaces the lower data bits with 0. Truncation can be masked

using the WL_MASK control bit. Truncation can be masked by the WL_MASK Refer to received

channel status bit description.

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