– 18 –
43 SYNC IN I Input of the synchronous separation circuit.
44 BLK DET – The terminal to be connected with an Black Det filter.
45 C IN I Input of chroma signals.
46 Y/C VCC – VCC of Y/C circuit.
47 IFDET OUT O Composite video signal and SIF signal detected in IF circuit.
48 LOOP FLTR – Loop filter for IF PLL.
49 VCO GND – GND of VCO and SIF circuit.
50 VCO – The terminal connected with a tank coil for IF VCO.
51 VCO – The terminal connected with a tank coil for IF VCO.
52 VCO VCC – VCC of IF VCO and SIF.
53 HCOR/SIF IN I H.curve correction and SIF input.
54 RIP FLTR – Connected with cap to stabilize the performance of SIF injection-lock circuit.
55 SIF OUT O Output of 2nd SIF signal. (Not used)
56 FM DC NF I The terminal for FM DC negative feedback and AGC filter for L-SECAM.
Pin No. Pin Name I/O Description
1 Y OUT O The output pin for Y signal.
2 DL-MODE O The pin for controlling the Y processing mode:
to VCC: 5.5MHz trap ; open: 5.5MHz trap + D.L ; to GND: DL. (Not used)
3 R-Y OUT O The output pin for demodulated R-Y signal.
4 R-Y CONT I The pin for controlling the black offset level. (Not used)
5 B-Y OUT O The output pin for demodulated B-Y signal.
6 B-Y CONT I The pin for controlling the black offset level. (Not used)
7 S-ID FILTER I The pin for connecting the SECAM ident filter capacitor.
8 R-Y IN I The input pin for external R-Y signal. (Not used)
9 VCC – The VCC pin for Y/C processing block.
10 B-Y IN I The input pin for external B-Y signal. (Not used)
11 GND – The GND pin.
12 F0-FIL I The pin for connecting a capacitor for automatic adjusting circuit.
13 C IN I The chroma signal input pin.
14 BELL-FIL I The pin for connecting a capacitor for the bell filter fo, 4.286MHz.
15 Y IN I The Y signal input pin.
16 BELLCONT I The pin for selecting the bell filter fo. fo + 70KHz: open ;
fo + 35KHz:20k to GND ; fo: to GND. (Connected to GND).
17 SCP-IN I The pin to input the sand castle pulse, SCP.
18 VCC – VCC pin for logic block.
19 4.43 CW I The pin for input 4.43MHz of carrier wave for self adjustment circuit.
20 ID SW I The switch pin for selecting the ID detection mode. H + V: connected to VCC ;
Auto search: opened ; H: connected to GND. (Not used.)
21 SYSTEM I/O The interface pin to the main processor.
Pin No. Pin Name I/O Description
IC, TA1275AZ