Wolfson WM8804 - Page 57

Production Data WM8804
w
PD Rev 4.1 September 2007
57
REGISTER
ADDRESS
BIT LABEL DEFAULT DESCRIPTION
5:4 REC_FREQ
[1:0]
-- Recovered Frequency Flag
Indicates recovered S/PDIF clock frequency:
00 = 192kHz
01 = 96kHz or 88.2kHz
10 = 48kHz or 44.1kHz
11 = 32kHz
6 UNLOCK - Unlock Flag
Indicates that the S/PDIF Rx clock recovery
circuit is unlocked.
0 = Locked onto incoming S/PDIF stream.
1 = Not locked onto the incoming S/PDIF
stream.
0 CON/PRO 0 Use Of Channel Status Block
0 = Consumer Mode
1 = Professional Mode
The WM8804 is a consumer mode device.
Detection of professional mode may give
erroneous behaviour.
1 AUDIO_N 0 Linear PCM Identification
0 = Data word represents audio PCM samples.
1 = Data word does not represent audio PCM
samples.
2 CPY_N 0 Copyright Information
0 = Copyright is asserted for Rx data.
1 = Copyright is not asserted for Rx data.
3 DEEMPH 0 Additional Format Information
0 = Recovered S/PDIF data has no pre-
emphasis.
1 = Recovered S/PDIF data has pre-emphasis.
5:4 Reserved 00 Reserved for additional de-emphasis modes.
R13
RXCHAN1
0Dh
(read-only)
7:6 CHSTMODE
[1:0]
00 Channel Status Mode
00 = Only valid mode for consumer
applications.
R14
RXCHAN2
0Eh
(read-only)
7:0 CATCODE
[7:0]
00000000 Category Code
Refer to S/PDIF specification (IEC 60958-3) for
full details.
0x00h indicates “general” mode.
3:0 SRCNUM
[3:0]
0000 S/PDIF Source Number
Refer to S/PDIF specification (IEC 60958-3) for
full details.
5:4 CHNUM1[1:0] 00 Channel Number For Sub-frame 1
00 = do not use channel number
01 = channel 1 to left channel
10 = channel 1 to right channel
R15
RXCHAN3
0Fh
(read-only)
7:6 CHNUM2[1:0] 00 Channel Number For Sub-frame 2
00 = do not use channel number
01 = channel 2 to left channel
10 = channel 2 to right channel
R16
RXCHAN4
3:0 FREQ[3:0] 0001 Indicated Sampling Frequency
Refer to S/PDIF specification (IEC 60958-3) for
full details.