MN66279RSC Datasheet, PDF (72/96 Pages) Panasonic Semiconductor – LSI FOR COMPACT DISC/CD ROM PLAYER

MN662790RSC
7-2 (11) Error correction
This LSI performs double correction for the C1 decoder and triple correction/quadruple correction for the C2
decoder.
ɾ For the C2 decoder, when the data is judged impossible to correct or not highly reliable (having a high
probability of erroneous correction or overlooking), it is interpolated by the interpolation circuit.
(In the case of audio mode I)
ɾ For the C1 and C2 decoders, correction results are output from the FLAG pin as FLAG0 to FLAG5.
When the C1 decoder detects an error for FLAG0, "H" is output for approx. 4.6 µs, starting from the
rising edge of FCLK.
FLAG1 to FLAG6 are output from FLAG pin in synchronization with the falling edge of SBCK input from
the outside.
<Meanings of FLAGs>
FLAG5
Ê·
FLAG4
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
̌
̌
̌
̌
̌
̍
̌
̍
̍
̌
̍
̌
̍
1
̍
1
FLAG3
Ê·
Ê·
Ê·
Ê·
̌
̍
̌
̍
̌
̍
FLAG2
̌
̌
̍
̍
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
̌
Ê·
1
Ê·
FLAG1
̌
̍
̌
̍
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
Ê·
FLAG0
̌
C1 no error
̍
C1 single error correction
̍
C1 double error correction
̍
C1 correction impossible
Ê·
C2 no error
Ê·
C2 single error correction
Ê·
C2 double error correction
Ê·
C2 double correction
impossible
Ê·
C2 triple error correction
Ê·
C2 triple correction
impossible
Ê·
C2 quadruple error
correction
Ê·
C2 quadruple correction
impossible
SDD00025AEM
72