lc890561w Sanyo Semiconductor Corporation, lc890561w Datasheet - Page 20

• Manufacturer Part Number: lc890561w
• Description: Cmos Digital Audio Interface Receiver With Built-in Data Buffer Memory
• Manufacturer: Sanyo Semiconductor Corporation

12.7 Output Data Error Processing
12.7.1 Upon Error Occurrence (Lock Error and Parity Error)
• The data processing upon error occurrence is described below. If input parity errors occur eight times or more in
• For the channel status, the data of the previous block is held in bit when a parity error occurs, regardless of the data type.
• Output data is muted upon occurrence of a PLL lock error or nine continuous parity errors.
• Figure 12.7 shows an example of data processing upon occurrence of a parity error
succession, transfer data is replaced by the data held in L-ch and R-ch of the previous frame in the case of PCM audio
data. However, if the data is Non-PCM burst data, error data is output without change as the transfer data. Non-PCM
burst data is detected based on data detected prior to occurrence of an input parity error when channel status bit 1 goes
high or when burst preamble Pa and Pb are detected.
* Input parity error (a): If occurred 9 times or more in succession
* Input parity error (b): If occurred 8 times or fewer, in the case of PCM audio data
* Input parity error (c): If occurred 8 times or fewer, in the case of Non-PCM burst data
DATAO and DATAO2
F0, F1, F2 outputs
Channel status
Validity flag
Data
Input data
ERROR
LRCK
DATAO
Figure 12.7 Example of Data Processing Upon Parity Error Occurrence (non delay setting)
1 occurrence
L-1 R-1 L-2 R-2 L-3 R-3 L-4 R-4 L-5 R-5 L-6 R-6 L-7 R-7 L-8 R-8
PLL lock error
L-0 R-0
Table 12.6 Data Processing Upon Error Occurrence
L
L
L
L
Previous value data
L-1 R-0 L-2 R-2 L-2 R-2 L-2 R-2 L-2 R-2 L-2
R-ch
LC890561W
Input parity error (a)
Previous value data
Output
Output
L-ch R-ch
Previous value data
L
…
Input parity error (b)
Previous value data
Previous value data
Output
Output
9 times or more: Muting
Input parity error (c)
Previous value data
Output
Output
Output
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