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7-10
Table 7-3-4 Terminal function of TDA4780
Fig. 7-3-11 Block diagram of TDA4780
Pin
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Name
FSW
2
R
2
G
2
B
2
V
P
–(B–Y)
–(R–Y)
Y
GND
R
1
G
1
B
1
FSW
1
SC
Function
High speed switch 2 input
Red input 2
Green input 2
Blue input 2
Power supply voltage
Color difference input – (B–Y)
Color difference input – (R–Y)
Luminance input
GND
Red input 1
Green input 1
Blue input 1
High speed switch 1 input
Sandcastle pulse input
Pin
No.
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Name
BCL
C
PDL
CL
C
POST
CI
B
O
C
G
G
O
C
G
R
O
C
R
YHUE
SDA
SCL
Function
Equal beam current limit input
Memory capacitor for peak limit
Memory capacitor for leakage current
compensation
Memory capacitor for peak dark
Cut-off measurement input
Blue output
Blue cut-off memory capacitor
Green output
Green cut-off memory capacitor
Red output
Red cut-off memory capacitor
Y output/hue adjustment output
I
2
C bus serial data input/check output
I
2
C bus serial clock input
1 10 nF
1 10 nF
1 10 nF
C
L
A
M
P
2 10 nF
2 10 nF
2 10 nF
C
L
A
M
P
10 nF
10 nF
Y 47 nF
C
L
A
M
P
SELECTOR
INPUT
R
G
B
PAL/SECAM
NTSC
MATRIX
Y
0.45V
1.43V
CONTROL REGISTERS
SC5
YHI
DELOF
FSBL
HDTV
YEXH
BCOF
RELC
TCPL
NMEN
FSON1
FSDI51
FSON2
FSDI52
8 DATA 6 DATA
REGISTERS
DIGITAL ANALOG CONVERTERS
F SBL
NMEN
HDTV
BLANK
MP
TIMING
GENERATOR
CL
HV
(H)
SC5
DELOF
BREN
I
2
C-BUS
RECEIVER
SCL SDA
I C-bus
2
Sand castle input
SC
330 nF
Leakage storagee
UGAP
220 nF 220 nF220 nF
LEAKAGE
CURRENT
COMPARATOR
1ST AND 2ND
SWITCH-ON
DELAY
CUT-OFF
CONTROL
Leakage and
cut-off
current input
Cut-off storage
OUTPUT
CLAMP
Y-MATRIX
COLOR
DIFFERENCE
MATRIX
R-Y
G-Y
B-Y
ADBL
Y
Y
ADAPTIVE
BLACK
Y
BL
Y
BL
GAMMA
R
G
B
R
G
B
R
G
B
gamma
R
G
B
SATURATION
ADJUST
CONTRAST
ADJUST
BRIGHTNESS
ADJUST
MOD2
BLUE
STRETCH
BLST
BB
BCOF
UGAP
BCOF
OUTPUT
BUFFER
WHITE
POINT
ADJUST
G
WHITE
POINT
ADJUST
R
WHITE
POINT
ADJUST
BLANK MP
BLANK
MP
BLANK MP
OUTPUT
BUFFER
OUTPUT
BUFFER
TCPL RELC
PEAK DRIVE
LIMITER
CUT-OFF RELATED
VOLTAGE
COMPARATOR
VOLTAGE
COMPARATOR
MINIMUM
DETECTOR
UGAP
BAND GAP
REFERENCE
HUE
ADJUST
YEXH
SUPPLY
AVERAGE
BEAM
CURRENT
LIMITING
RELC
PEAK DRIVE
LIMITER
ABSOLUTE LEVEL
Peak drive
limiting strage
Average
beam
current
limiting
input
200
V
P
-BV
YHUE
Y-output
hue adjust
output
1 µF
1 µF
Peak dark
storage
FSW1 FSW2
TDA4780
TDA4780
R
G
B
R
G
B
R
O
G
O
B
O
V
UGAP
SAND CASTLE
DETECTOR
a2 ki
24
22
20
19
25
21
23
17
1428 27
10
11
12
2
3
4
6
7
8
13 1
15
16
18 26 9 5
-(B-Y)
-(B-Y)