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55
RFN
54
RFP
The control parameters of DVD EQ and CD EQ are as follows.
1) DVD EQ control parameter
- DVDEQ(pin 43) : Changes the gain of peak frequency with EQ frequency characteristic. Convert PWM
- DVDTIME(pin 41) : Changes the peak frequency with EQ frequency characteristic. Convert PWM signal,
- S/Dse1(pin 64) : Changes the peak frequency (like DVD TIME) as 2d control. ( Switched according to
regeneration speed ratio of single/double layer).
- MCK(pin 15) : Input the base clock and link the peak frequency with it. The amplitude of MCK might be
small (500mVp-p).
- DVDGD(pin 25) : Changes the group delay characteristics with EQ frequency characteristic.
2) CD EQ control parameter
- CD EQ(pin 40) : Changes the gain of peak frequency with EQ frequency characteristic. The constant DC is
supplied to a resistive voltage divider.
- CD TIME(pin 42) : Changes the peak frequency with EQ frequency characteristic. The constant DC is
- S/Qse1(pin 44) : Changes the peak frequency (such as CD TIME) as 2d control. (Switched according to play
Note : CD and DVD signals are equalized according to the above control parameters ,and then output to CD
EQ OUT (pin39) and DVD EQ OUT (pin34). Then, CD signal is transferred to TC9420F, DVD signal is
sent to TC90A19F and detected.
2-2-2 Description of data processor for DVD
(Including DIC1 and DIC5 protection IC)
1. Outline
The data processor IC for DVD does the following :
1) Converts RF signal to digital, demodulates original signal and corrects errors,
2) PLL circuit to generate the clock for data detection in accordance with play velocity,
3) CLV control circuit to control the rotation rate of disc,
4) DIC5 Protection IC, connected with input/output of data processor, which releases the protection for the
protected data (which is then transmitted to video decoder and Micom).
Samsung Electronics
DVDsel
RFgain
EQout
47
48
46
VCA
RIC1
TA1236F
signal, output from TC90A19F, into DC via low-pass filter.
output from TC90A19F, into DC via low-pass filter.
supplied to a resistive voltage divider.
linear velocity ratio of quadruple/single rate. Set to Ô0Õ because only one rate is vaild in
this system).
CD
CD
EQin
EQ
TIME
SQsel
45
40
42
44
ATT
CD EQ
DVD EQ
GEN.
T/CON
64
41
43
15
SDsel DVD
DVD
MCK
TIME
EQ
Fig. 2-21
Reference Information
39
CD EQ OUT
25
DVD G/D
34
DVD EQ OUT
2-11
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