Wolfson WM8580, Instruction Manual

Page: 94 / 103

WM8580
Production Data
w
PD, Rev 4.7, March 2009
94
REGISTER
ADDRESS
BIT LABEL DEFAULT DESCRIPTION
5:4 CLKACU[1:0] - Clock Accuracy of received clock.
00 = Level II
01 = Level I
10 = Level III
11 = Interface frame rate not matched to sampling frequency.
0 MAXWL - Maximum Audio sample word length
0 = 20 bits
1 = 24 bits
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] -
All other combinations are reserved and may give erroneous
operation. Data will be truncated internally when these bits are set
unless WL_MASK is set.
R48
SPDRXCHAN 5
30h
7:4 ORGSAMP
[3:0]
- Original Sampling Frequency. See S/PDIF specification for details.
0000 = original sampling frequency not indicated
0 AUDIO_N - Linear PCM Identification
0 = Data word represents audio PCM samples.
1 = Data word does not represent audio PCM samples.
1 PCM_N - Indicates that non-audio code (defined in IEC-61937) has been
detected.
0 = Sync code not detected.
1 = Sync code detected – received data is not audio PCM.
2 CPY_N - Recovered Channel Status bit-2.
0 = Copyright is asserted for this data.
1 = Copyright is not asserted for this data.
Note this signal is inverted and will cause an interrupt on logic 0.
3 DEEMPH - Recovered Channel Status bit-3
0 = Recovered S/PDIF data has no pre-emphasis.
1 = Recovered S/PDIF data has pre-emphasis
5:4 REC_FREQ
[1:0]
-- Indicates recovered S/PDIF clock frequency:
00
= Invalid
01 = 96kHz / 88.2kHz
10 = 48kHz / 44.1kHz
11 = 32kHz
R49
SPDSTAT
31h
6 UNLOCK - Indicates that the S/PDIF Clock Recovery circuit is unlocked or
that the input S/PDIF signal is not present.
0 = Locked onto incoming S/PDIF stream.
1 = Not locked to the incoming S/PDIF stream or the incoming
S/PDIF stream is not present.
0 PWDN 0 Chip Powerdown Control (works in tandem with the other
powerdown registers):
0 = All digital circuits running, outputs are active
1 = All digital circuits in power save mode, outputs muted
R50
PWRDN 1
32h
1 ADCPD 1 ADC powerdown:
0 = ADC enabled
1 = ADC disabled
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