PRO-700HD
251
7
NJM2233BM (SIGNAL ASSY: IC7103, IC7303, IC7305, IC7306)
VIDEO SW
¶
Block Diagram
1
2
3
4
8
7
6
GND
VCC
NC
NC
5
BIAS
Vout
Vin1
Vin2
CTL
¶
Control Input – Output Signal
CTL
L
H
Function
Vin1
Vin2
Pin No.
40
41
42
43
44
45
46
47
48
Pin Name
Y input
DAC Vcc
C Vcc
UV/IQ SW
fsc output
1HDL CONT
SECAM CONT
B-Y/Q output
R-Y/I output
I/O
I
—
—
I
O
O
I/O
O
O
Function
Input pin for composite video signal or Y signal.
VCC pin for DAC block and chroma processing block.
Connected to 5V (standard).
Switches between UV demodulation and IQ demodulation.
UV demodulation is set when this pin is open and IQ demodulation
is set when GND.
Outputs the X'tal oscillation.
The pin voltage becomes high only when 3.58 NTSC is received.
Outputs the PAL/SECAM/NTSC differentiation results.
Input/output pin to control the SECAM demodulation IC.
Determined as SECAM when more than 250 @u@A current is
pulled from this pin.
The B-Y (U) signal or Q signal is output.
Incorporates the LPF for eliminating the carrier inside.
Outputs the R-Y (V) signal or I signal.
Incorporates an LPF for eliminating carrier.
I/O Signal
–
UV
––– 0.7V
IQ
––– 0
AC ; 0.6Vp-p
DC ;
3.58NTSC : 3.2V
Others
: 1.4V
4.3V ; PAL
2.5V ; SECAM
0V
; NTSC
When PAL/NTSC : 4.0V
When SECAM (White/black):
0.75V
DC ; 2.5V
Rainbow color bar ;
360 mVp-p
DC ; 2.5V
Rainbow color bar ;
360 mVp-p
1Vp-p
GND
2.5V
