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參數資料
| 型號： | TMC2491AR2C |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 顏色信號轉換 |
| 英文描述： | COLOR SIGNAL ENCODER, PQCC44 |
| 封裝： | PLASTIC, LCC-44 |
| 文件頁數： | 34/36頁 |
| 文件大小： | 208K |
| 代理商： | TMC2491AR2C |
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PRODUCT SPECIFICATION
TMC2490A/TMC2491A
7
Control Register Denitions (continued)
Video Output Control Register (05)
7
6
5
4
3
2
1
0
PALN
BURSTF
CHRBW
SYNCDIS
BURDIS
LUMDIS
CHRDIS
PEDEN
Reg
Bit
Name
Description
05
7
PALN
Select PAL-N Subcarrier. When HIGH, selects PAL-N subcarrier
frequency. When LOW, the encoder produces the PAL-B,G,H,I subcarrier.
Program LOW for NTSC and PAL-M video.
05
6
BURSTF
Burst flag disable. When BURSTF is LOW, a clamp gate signal is
produced on the D1 output and register 0E bit 1.
05
5
CHRBW
Chroma bandwidth select. When LOW, the chrominance bandwidth is
±650 kHz. When HIGH, the chrominance bandwidth is ±1.3 MHz.
05
4
SYNCDIS
Sync pulse disable. When HIGH, horizontal and vertical sync pulses on the
COMPOSITE video output are suppressed (to blanking level). Color burst,
active video, and the CSYNC output remain active. Set LOW for normal
composite video operation.
05
3
BURDIS
Color burst disable. When HIGH, color burst is suppressed to the blanking
level. Set LOW for normal operation.
05
2
LUMDIS
Luminance disable. When HIGH, incoming Y values are forced to black
level. Color burst, CHROMA, and sync are not affected. Set LOW for normal
operation.
05
1
CHRDIS
Chrominance disable. When HIGH, incoming color components CB and
CR are suppressed, enabling monochrome operation. Output color burst is
not affected. Set LOW for normal color operation.
05
0
PEDEN
Pedestal enable. When LOW, black and blanking are the same level for
ALL lines. When HIGH, a 7.5 IRE pedestal is inserted into the output video
for NTSC and PAL-M lines 23-262 and 286-525 only. Chrominance and
luminance gain factors are adjusted to keep video levels within range.
PEDEN is valid for NTSC and PAL-M only and should be LOW for all other
formats.
Field Data Register (06)
7
6
5
4
3
2
1
0
Reserved
FIELD
Reserved
Reg
Bit
Name
Description
06
7–6
Reserved
Program LOW.
06
5–3
FIELD
Field ID (Read only). A value of 000 corresponds to field 1 and 111
corresponds to field 8.
06
2–0
Reserved
Program LOW.
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