WM8581SEFT Wolfson Microelectronics Ltd., WM8581SEFT Datasheet - Page 86

• Manufacturer Part Number: WM8581SEFT
• Description: Multichannel Codec with S/pdif Transceiver
• Manufacturer: Wolfson Microelectronics Ltd.

WM8581
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REGISTER
ADDRESS
SPDSTAT
PWRDN 1
PWRDN 2
R49
R50
R51
31h
32h
33h
BIT
7:4
5:4
4:2
0
1
2
3
6
0
1
6
0
1
2
REC_FREQ
DACPD[3:0]
ALLDACPD
ORGSAMP
AUDIO_N
DEEMPH
UNLOCK
PLLAPD
PLLBPD
OSCPD
PCM_N
ADCPD
LABEL
CPY_N
PWDN
[3:0]
[1:0]
DEFAULT
1111
--
0
1
1
0
1
1
-
-
-
-
-
-
All other combinations are reserved and may give erroneous
operation. Data will be truncated internally when these bits are set
Original Sampling Frequency. See S/PDIF specification for details.
0000 = original sampling frequency not indicated
Recovered Channel Status bit-1.
0 = Data word represents audio PCM samples.
1 = Data word does not represent audio PCM samples.
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.
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.
Recovered Channel Status bit-3
0 = Recovered S/PDIF data has no pre-emphasis.
1 = Recovered S/PDIF data has pre-emphasis
Indicates recovered S/PDIF clock frequency:
00 = 192kHz
01 = 96kHz / 88.2kHz
10 = 48kHz / 44.1kHz
11 = 32kHz
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.
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
ADC powerdown:
0 = ADC enabled
1 = ADC disabled
DAC powerdowns (0 = DAC enabled, 1 = DAC disabled)
DACPD[0] = DAC1
DACPD[1] = DAC2
DACPD[2] = DAC3
DACPD[3] = DAC4
Overrides DACPD[3:0]
0 = DACs under control of DACPD[3:0]
1= All DACs are disabled.
OSC power down
0 = OSC enabled
1 = OSC disabled
0 = PLLA enabled
1 = PLLA disabled
0 = PLLB enable
1 = PLLB disable
101
110
DESCRIPTION
24 bits
21 bits
PP Rev 1.0 March 2006
Product Preview
20 bits
17 bits
86