LC89057W-VF4A-E SANYO [Sanyo Semicon Device], LC89057W-VF4A-E Datasheet - Page 27

• Manufacturer Part Number: LC89057W-VF4A-E
• Description: Digital Audio Interface Transceiver
• Manufacturer: SANYO [Sanyo Semicon Device]

10.4.5 Data processing upon occurrence of errors (lock error, parity error)
•
•
•
* Input parity error (a): If occurs 9 or more times in succession
* Input parity error (b): If occurs 8 or fewer times in succession, in case of audio data
* Input parity error (c): If occurs 8 or fewer times in succession, in case of non-PCM burst data
•
The data processing upon occurrence of an error is described below. If 8 or fewer input parity errors occur in
succession and transfer data is PCM audio data, the data is replaced by the one saved each in L-ch and R-ch in the
previous frame. However, if the transfer data is non-PCM data, the error data is output as it is. Non-PCM data is the
data of when bit 1 non-PCM data detection bit of the channel status turns to "H" based on the data detected prior to the
occurrence of the input parity error.
Output data is muted when a PLL lock error occurs or a parity error occurs 9 or more times in succession.
As for the channel status output, the data of the previous block is held in 1-bit units when a parity error occur 8 or
fewer times in succession.
RDATA output
fs calculation result
Channel status
Validity flag
User data
Figure 10.11 shows an example of data processing upon occurrence of a parity error.
Input data
Data
RLRCK
RDATA
RERR
L-1
Figure 10.11 Example of Data Processing upon Parity Error Occurrence
1occurrence
R-1
L-0
R-0
L-2
PLL Lock Error
Table 10.5 Data Processing upon Error Occurrence
R-2
L-1
“L”
“L”
“L”
“L”
“L”
value data
Previous
R-ch
R-0
L-3
LC89057W-VF4A-E
R-3
L-2
R-2
L-4
Input Parity Error (a)
value data
L-ch R-ch
Previous
R-4
L-2
Output
“L”
“L”
“L”
“L”
R-2
L-5
R-5
L-2
R-2
L-6
Input Parity Error (b)
Previous value data
Previous value data
R-6
L-2
9 times or mote : Muting
Output
Output
Output
R-2
L-7
R-7
L-2
L-8
R-8
Input Parity Error (c)
Previous value data
Output
Output
Output
Output
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