WM8581SEFT Wolfson Microelectronics Ltd., WM8581SEFT Datasheet - Page 62

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

WM8581
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Table 59 Status Flag Description
REC_FREQ[1:0]
REC_FREQ192
TRANS_ERR
NON_AUDIO
SFRM_CLK
AUDIO_N
DEEMPH
UNLOCK
INVALID
192BLK
PCM_N
CPY_N
ZFLAG
CSUD
FLAG
INTB
U
C
V
P
STATUS FLAGS
There are several status flags generated by the S/PDIF Receiver, described below.
Indicates that the S/PDIF Clock Recovery circuit is unlocked, or the
incoming S/PDIF signal is not present.
0 = Locked onto incoming S/PDIF stream.
1 = Not locked to the incoming S/PDIF stream, or incoming stream
is not present.
Indicates that recovered S/PDIF data is marked as invalid.
0 = Data marked as valid
1 = Data marked as invalid
Indicates that recovered S/PDIF frame has parity errors or bi-phase
encoding errors, or that sub-frames were recovered out of
sequence
0 = No data errors or bi-phase encoding errors detected and sub-
frame sequence correct
1 = Data errors or bi-phase encoding errors detected or subframe
sequence incorrect (missing preamble)
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 (active low)
0 = Copyright is asserted for this data.
1 = Copyright is not asserted for this data.
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 sample rate.
00 = 192kHz
01 = 96kHz / 88.2kHz
10 = 48kHz / 44.1kHz
11 = 32kHz
Interrupt signal (see section Interrupt Generation)
Recovered validity-bit for current sub-frame
Recovered user-bit for current sub-frame
Recovered channel-bit for current sub-frame
Recovered parity-bit for current sub-frame
Indicates current sub-frame:
1 = Sub-frame A
0 = Sub-frame B
Indicates start of 192 frame-block. High for duration of frame-0.
Indicates that the 192 frame-block of channel status data has
updated.
Indicates that the recovered S/PDIF clock frequency is 192kHz
Indicates ‘zero-detection’ in DACs. See page 45 for more details
Logical OR of PCM_N and AUDIO_N
DESCRIPTION
PP Rev 1.0 March 2006
pins, SWMODE pin
GPO pins, SDO pin
(when in hardware
(when in hardware
Register, S/PDIF
Register, S/PDIF
Register, S/PDIF
Status Register,
Status Register,
MUTE pin, GPO
Interrupt Status
Interrupt Status
Channel Status
Status Register
Channel Status
Channel Status
Register, GPO
S/PDIF Status
S/PDIF Status
S/PDIF Status
VISIBILITY
GPO pins
GPO pins
GPO pins
GPO pins
GPO pins
GPO pins
GPO pins
GPO pins
GPO pins
GPO pins
GPO pins
Register
Register
Register
Register
mode)
mode)
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pins
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