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