WM8804 datasheet(39/66 Pages) WOLFSON

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Production Data

WM8804

PD Rev 4.1 September 2007

NON_AUDIO

Non-Audio Flag

Logical OR of PCM_N and AUDIO_N

Interrupt status

GPO,

SDOUT - hardware

mode

CSUD

Channel Status Update

Indicates that channel status registers have updated and may be read back

over the serial interface.

Interrupt status

GPO

DEEMPH

De-emphasis Flag

0 = Recovered data has no pre-emphasis

1 = Recovered data has pre-emphasis

S/PDIF Status

GPO

Table 45 S/PDIF Receiver Status Flags Description

‘WITH FLAGS’ MODE

The WM8804 features a ‘With Flags’ mode to enable the user to append status flags to the audio

sample streamed transmitted from the digital audio interface. When WITHFLAG is set to 1 ‘With

Flags’ mode is enabled and the flags in Table 47 are appended to the LSB of the audio sample. If

WITHFLAG is set to 0 ‘With Flags’ mode is disabled and only the audio sample is transmitted from

the digital audio interface.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R29

SPDRX1

1Dh

WITHFLAG

Enable With Flags Mode

0 = Disabled

1 = Enabled

Table 46 With Flags Mode Control Register

WITH FLAGS BIT ORDER

FLAG

192BLK

CSUD

TRANS_ERR

UNLOCK

NON_AUDIO

Table 47 Flags Appended to Audio Sample in ‘With Flags’ Mode

Diagrams illustrating ‘With Flags’ mode for each audio data format can be found on page 48 of the

data sheet (Figure 23 to Figure 27).

Note: 24-bit RJ digital audio interface mode does not support ‘With Flags’ mode.

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