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WM8777
The register descriptions for the channel status bits are given below. Note that the descriptions
below refer to consumer mode. The WM8777 may give erroneous behaviour if professional format
data is input.
REGISTER
ADDRESS
BIT
LABEL
CHANNEL
STATUS
BIT
DESCRIPTION
(4Ch)
0
CON/PRO
0
0 = Consumer Mode
S/PDIF
Receiver
Channel
Status
Register 1
(read-only)
1 = Professional Mode
The WM8777 is a consumer mode device.
Detection of professional mode may give
erroneous behaviour.
1
AUDIO_N
1
Recovered S/PDIF Channel status bit 1.
0 = Data word represents audio PCM
samples.
1 = Data word does not represent audio
PCM samples.
2
3
CPY_N
2
3
0 = Copyright is asserted for this data.
1 = Copyright is not asserted for this data.
PREEMPH
0 = Recovered S/PDIF data has no pre-
emphasis.
1 = Recovered S/PDIF data has pre-
emphasis.
5:4
Reserved
5:4
Reserved for additional de-emphasis modes.
Table 40 S/PDIF Rx Channel Status Register 1
REGISTER
ADDRESS
BIT
LABEL
CHANNEL
STATUS
BIT
DESCRIPTION
(4Dh)
7:0
CATCODE
[7:0]
15:8
Category Code. Refer to S/PDIF
specification for details.
S/PDIF
Receiver
Channel
Status
00h indicates “general” mode.
Register 2
(read-only)
Table 41 S/PDIF Rx Channel Status Register 2
REGISTER
ADDRESS
BIT
LABEL
CHANNEL
STATUS
BIT
DESCRIPTION
(4Eh)
3:0
7:4
SRCNUM
[3:0]
19:16
Indicates number of S/PDIF source.
Channel number for channel 1.
S/PDIF
Receiver
Channel
Status
Register 3
(read-only)
CHNUM1[3:0]
23:20
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
Table 42 S/PDIF Rx Channel Status Register 3
PP Rev 1.94 November 2004
51
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
