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Video Capture Registers
Table
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| Description |
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Bit | field (1) | symval (1) | Value | BT.656 or Y/C Mode | Raw Data Mode | TCI Mode |
19 | EXC | OF(value) |
| External control select bit. (Channel A only) |
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| DEFAULT | 0 | Use EAV/SAV codes. | Not used. | Not used. |
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| EAVSAV |
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| EXTERN | 1 | Use external control signals. | Not used. | Not used. |
18 | FLDD | OF(value) |
| Field detect method bit. (Channel A only) |
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| DEFAULT | 0 | 1st line EAV or FID input. | Not used. | Not used. |
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| EAVFID |
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| FDL | 1 | Field detect logic. | Not used. | Not used. |
17 | VRST | OF(value) |
| VCOUNT reset method bit. |
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| V1EAV | 0 | Start of vertical blank (1st V = 1 | Not used. | Not used. |
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| EAV or VCTL2 active edge) |
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| DEFAULT | 1 | End of vertical blank (1st V = 0 | Not used. | Not used. |
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| V0EAV |
| EAV or VCTL2 inactive edge) |
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16 | HRST | OF(value) |
| HCOUNT reset method bit. |
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| DEFAULT | 0 | EAV or VCTL1 active edge. | Not used. | Not used. |
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| EAV |
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| SAV | 1 | SAV orVCTL1 inactive edge. | Not used. | Not used. |
15 | VCEN | OF(value) |
| Video capture enable bit. Other bits in VCACTL (except RSTCH and BLKCAP | ||
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| bits) may only be changed when VCEN = 0. |
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| DEFAULT | 0 | Video capture is disabled. |
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| DISABLE |
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| ENABLE | 1 | Video capture is enabled. |
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Reserved | - | 0 | Reserved. The reserved bit location is always read as 0. A value written to this | |||
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| field has no effect. |
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12 | LFDE | OF(value) |
| Long field detect enable bit. |
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| DEFAULT | 0 | Long field detect is disabled. | Not used. | Not used. |
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| DISABLE |
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| ENABLE | 1 | Long field detect is enabled. | Not used. | Not used. |
11 | SFDE | OF(value) |
| Short field detect enable bit. |
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| DEFAULT | 0 | Short field detect is disabled. | Not used. | Not used. |
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| DISABLE |
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| ENABLE | 1 | Short field detect is enabled. | Not used. | Not used. |
10 | RESMPL | OF(value) |
| Chroma |
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| DEFAULT | 0 | Chroma | Not used. | Not used. |
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| DISABLE |
| disabled. |
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| ENABLE | 1 | Chroma is horizontally | Not used. | Not used. |
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| to 4:2:0 interspersed before |
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| saving to chroma buffers. |
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9 | Reserved | - | 0 | Reserved. The reserved bit location is always read as 0. A value written to this | ||
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| field has no effect. |
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8 | SCALE | OF(value) |
| Scaling select bit. |
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| DEFAULT | 0 | No scaling | Not used. | Not used. |
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| NONE |
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| HALF | 1 | ½ scaling | Not used. | Not used. |
74 | Video Capture Port | SPRUEM1 |
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