25
Model No: CT-21FDS1
Version 1.0
D: Pin functions of N101 ( LA7830)
Pin Symbol
Function
1
GND
Connect to ground
2
OUT
Field pulse output
3
Pump power supply input
4
IN
V sawtooth pulse input
5
Connet to phase compensate capacitance
6
Vcc
Power supply pin
7
Pump power supply output
D: Pin functions of N251 ( TA1275)
Pin Symbol
Function
1
YOUT
The output pin for Y signal standard output level is 1.0Vp-p.
2
MODESW
The pin for controlling the Y processing mode.
3
R-Y OUT
The output pin for demodulated R-Y signal
4
R-Y BLACK CONTOL
The pin for controlling the black offset level.
5
B-Y OUT
The output pin for demodulated B-Y signal.
6
B-Y BLACK CONTROL
The pin for controlling the black offset level.
7
S-ID FILTER
The pin for connecting the SECAM identification filter
capactitor.
8
EXT. R-Y IN
The input pin for external R-Y signal.
9
5V Vcc
The Vcc pin for Y/C processing block.
10
EXT.B-Y IN
The input pin for external B-Y signal.
11
GND
The GND pin
12
FO-ADJ. FILTER
The pin for connecting a capacitor for automatic adjusting
circuit
13
C IN
The chroma signal input pin.
14
BELLADJ. FILTER
The pin for connection the filter capacitor for the bell filter FO.
15
Y IN
The Y signal input pin.
16 GND
17
SCP IN
The pin for input the sandcastle pulse
18
5V Vc-c
Vc-c pin for logic block
19
4.43MHz CW IN
The pin for input 4.43MHz of carrier wave for self-adjustment
circuit.
20
ID SW
The switch pin for selecting the ID detection mode.
21
SECAM ID IN/OUT
The interface pin to the main processor TB1238AN
