Toshiba TLP510E Technical Training Manual - Page 33
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Print Page7-3-2. Video/Color Circuit
The video/color circuit consists of two ICs, QV005
(TDA9141: NTSC/PAL/SECAM DECODER), QV006
(TDA4665T: BASE BAND DELAY LINE), and supports
each system of NTSC, PAL and SECAM.
Color difference signal
12 11
4 3
(NTSC/PAL/SECAM)
Fig. 7-3-3
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
input
CHROMINANCE
SWITCH
Luminance/
DELAY
26
CVBS input
Digital
8
BIAS
supply
decoupling
27
9
Analog
Digital
ground
ground
Color difference signal
16 14
TDA4665T
(1H DL IC)
5
Sand castle pulse
10
2 1
TDA9141
Horizontal
PLL filter
24
TIMING
VERTICAL
GENERATOR
SYNC
SYNC
HORIZONTAL
SEPARATOR
CLOCHE
ACC
FILTER
CHROMI-
NANCE
TRAP
BANDPASS
7
Positive supply
Fig. 7-3-5 Block diagram of TDA9141
Fig. 7-3-4 shows the pin configuration of TDA9141 and
Fig. 7-3-5 shows the block diagram of TDA9141. Fig. 7-
3-6 shows the pin configuration of TDA4665T and Fig.
7-3-7 shows the block diagram of TDA4665T.
-(R-Y)
-(B-Y)
SCL
SDA
Supply
Digital supply decoupling
Digital ground
Sand castle
Yout
Vout
Uout
I / O port
O port / LLC
Fig. 7-3-4 Pin configuration of TDA9141
Vertical acquisition
synchronization pulse
Clamping pulse/
Sand castle
H
synchronization
A
output
pulse input/output
10
11
17
V
A
H
A
CLP
STM
TDA9141
PLL
FILTER
TUNING
PLL
29
30
31
PLL
Reference
Second
loop filter
crystal input
crystal
input
7-6
1
32
SECAM reference
2
31
Second crystal
Uin
3
30
Reference crystal
Vin
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
VA
11
22
Address in / CVBS out
12
21
R
13
20
G
14
19
B
15
18 F
16
17 CLP / HA
GREEN
Chrominance
input
U input
Fast switch
Chrominance
RED
BLUE
select input
input
input
voltage input
21
20
19
18
3
4
MATRIX
SWITCH
IDENTIFI-
CATION
SECAM
DEMODU-
SWITCH
LATOR
PAL/NTSC
DEMODU-
HUE
LATOR
FSC
BUFFER
23
Comb filter
status input/output
Chrominance
14
U output
Chrominance
13
V output
12
Luminance output
SECAM reference
32
decoupling
1
Chrominance
outputs
2
Filter reference
28
decoupling