MN662785TBUC Datasheet, PDF (62/89 Pages) Panasonic Semiconductor – LSI FOR COMPACT DISC/CD ROM PLAYER

MN662785TBUC
B. Subcode data read
By inputting a clock from SBCK pin, subcode data, P to W, can be read from SUBC pin. The timing is shown
in the figure below.
Since subcode data varies every falling edge of NCLDCK, input 8 clocks of SBCK every falling edge of
NCLDCK, and switch the content of SUBC output to P to W.
Then SUBC output which varies in synchronization with the falling edge of SBCK is received at the timing of
the rising edge of SBCK. All subcode data can be read by repeating the operation above for each NCLDCK.
By inputting SBCK, the content of FLAG output will vary. So measuring the error rate while reading subcode
is not possible. Take it into consideration when designing the system.
BLKCK
NCLDCK


Typ. ɹɹ
Typ.
136 µs 1.6 µs
SBCK


SUBC ɹ S0 ɹɹ S1
P1 to W1 P2 to W2 P3 to W3 P4 to W4 P5 to W5 P6 to W6 P7 to W7
NCLDCK
SBCK


SUBC ɹɹɹɹɹɹɹɹ P
ˎˎ
ˎ
Q
R
S
T
U
V
W
ˎ
ˎ
ˎ: Refer to the values specified in the PRODUCT STANDARDS.
Figure 7-2-2 NCLDCK, SUBC, and SBCK timing chart
SDD00026AEM
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