wm8802scft/v Wolfgang Knap, wm8802scft/v Datasheet - Page 29

• Manufacturer Part Number: wm8802scft/v
• Description: Digital Audio Interface Transceiver
• Manufacturer: Wolfgang Knap

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Table 11 Data Processing upon Error Occurrence
Notes:
1.
2.
3.
w
fs calculation result
Channel status
Input parity error (A): Occurs 9 or more times in succession
Input parity error (B): Occurs 8 or fewer times in succession, in case of audio data
Input parity error (C): Occurs 8 or fewer times in succession, in case of non-PCM burst data
RDATA output
Validity flag
User data
DATA
PLL LOCK
Figure 20 shows an example of data processing upon occurrence of a parity error.
Figure 20 Data Processing Upon Parity Error Occurrence
PROCESSING DURING ERROR RECOVERY
PLL becomes locked and data demodulation begins when preambles B, M and W are detected.
RDATA output data is output from the RLRCK edge after RERR goes Low.
ERROR
Low
Low
Low
Low
Low
Input Data
RDATA
RLRCK
RERR
INPUT PARITY
ERROR (A)
L-1
Output
An error occurs a single time
Low
Low
Low
Low
R-1
L-0
L-2
R-0
R-2
R-ch
Previous data value
L-1
L-3
R-0
Previous value data
Previous value data
INPUT PARITY
R-3
L-2
ERROR (B)
Output
Output
Output
L-4
R-2
R-4 L-5 R-5 L-6 R-6 L-7 R-7 L-8 R-8
L-2 R-2 L-2 R-2 L-2 R-2 L-2 R-2
L-ch R-ch ….
Previous data value
Previous value data
INPUT PARITY
ERROR (C)
Output
Output
Output
Output
Muted after 9 or more
consecutive errors
PP Rev 1.1 April 2004
WM8802
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