Video/Color Circuit - Toshiba TLP411E Technical Training Manual

3-2. Video/Color Circuit

The video/color circuit consists of two ICs, TDA9141 (NTSC/
PAL/SECAM DECODER), TDA4665T (BASEBAND DE-
LAY LINE), and supports each system of NTSC, PAL and
SECAM.
Color difference signal
12 11
TDA4665T
(1H DL IC)
5
4 3 10
TDA9141
(NTSC/PAL/SECAM)
Fig. 7-6
Serial data Serial clock
input/output input
5 6
Address
2
I CBUS
input
22
INTERFACE
(CVBS output)
Input/output
15
port
LCA
Output port/
line-locked
16
clock output
Chrominance
25
CHROMINANCE
input
SWITCH
Luminance/
26 DELAY
CVBS input
Digital
8 BIAS
supply
decoupling
27 9
Analog Digital
ground ground
Color difference signal
16 14
Sand castle pulse
2 1
Horizontal
PLL filter
24
VERTICAL TIMING
GENERATOR
SYNC
SYNC
HORIZONTAL
SEPARATOR
CLOCHE
ACC
FILTER
CHROMI-
NANCE
TRAP
BANDPASS
7
Positive supply
Fig. 7-8 Block diagram of TDA9141
Fig. 7-7 shows the pin configuration of TDA9141 and Fig.
7-8 shows the block diagram of TDA9141. Fig. 7-9 shows
the pin configuration of TDA4665T and Fig. 7-10 shows
the block diagram of TDA4665T.
-(R-Y)
-(B-Y)
Uin
Vin
SCL
SDA
Supply
Digital supply decoupling
Digital ground
Sand castle
VA
Yout
Vout
Uout
I / O port
O port / LLC
Fig. 7-7 Pin configuration of TDA9141
Vertical acquisition
synchronizaotion pulse
Clamping pulse/
Sand castle
H synchronization
A RED
output
pulse input/output
input
10 11 17 21
V
A
H
A
CLP
STM
TDA9141
PLL
FILTER
TUNING
PLL
29 30 31
PLL Reference Second Comb filter
loop filter crystal input crystal status input/output
input
7-6
1 32 SECAM reference
2 31 Second crystal
3 30 Reference crystal
4 29 CPLL
5 28 Filter reference
6 27 Analog ground
7 26 Y/CVBS in
8 25 Cin
9 24 HPLL
10 23 Fscomb
11 22 Address in / CVBS out
R
12 21
13 20 G
14 19 B
15 18 F
16 17 CLP / HA
GREEN Chrominance
input U input
Fast switch
Chrominance
BLUE
select input
voltage input
input
20 19 18 3 4
14
MATRIX SWITCH 13
12
IDENTIFI-
CATION
32
SECAM 1
DEMODU- SWITCH
LATOR 2
28
PAL/NTSC
DEMODU-
HUE
LATOR
FSC
BUFFER
23
Chrominance
U output
Chrominance
V output
Luminance output
SECAM reference
decoupling
Chrominance
outputs
Filter reference
decoupling