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参数资料
| 型号： | DDP3315CQA |
| 厂商： | MICRONAS SEMICONDUCTOR HOLDING AG |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP80 |
| 封装： | PLASTIC, QFP-80 |
| 文件页数： | 4/62页 |
| 文件大小： | 1746K |
| 代理商： | DDP3315CQA |
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ADVANCE INFORMATION
12
Micronas
2.1.10. Picture Frame Generator
The picture frame generator produces a programma-
ble border surrounding the displayed image. By swap-
ping the start and stop parameters a windows is pro-
duced instead.
The color of the complete border is stored in a pro-
grammable frame register. The format is 3x4 bit RGB.
The contrast can be adjusted separately.
2.1.11. Scan Velocity Modulation
Picture tubes equipped with an appropriate yoke can
use the Scan Velocity Modulation signal to vary the
speed of the electron gun during the entire video scan
line dependent upon its content. Transitions from dark
to bright will first speed up and then slow down the
scan; vice versa for the opposite transition
The signal delay is adjustable by
±3.5 clocks in half-
clock steps in respect to the analog RGB output sig-
nals. This is useful to match the different groupdelay of
analog RGB amplifiers to the one for the SVM yoke
current.
Fig. 2–8: SVM signal waveform
2.1.12. Non-linear Colorspace Enhancer (NCE)
This block allows all kinds of non-linear functions such
as gamma correction, blue stretch, peak white limita-
tion, for each path R,G and B separately. In the follow-
ing only one path is described (see Fig. 2–9).
Whereas the full input range of the NCE is 0...2047,
the non-linear function is a combination of 8 I
2C pro-
grammable linear segments S0 to S7 lying in the range
0...1023. Beyond 1023, the non-linear curve consists
of the continuation of S7 and the limitation to 1023.
If the segments S0 to S7 cover the full input range from
0 to 1023 they can be placed on a grid of 32. In the
case where all segments lie in a smaller range, the fol-
lowing modes with higher precision are available.
Fig. 2–9: NCE characteristic
t
ampl.
beam
current
SVM yoke
current
Table 2–4: Input range and grid covered by S0...S7
Mode
Range
Grid
XSEG = 0
0...1023
32
XSEG = 1
0...511
16
XSEG = 2
0...255
8
XSEG = 3
0...127
4
1024
02047
1023
XS
EG
=
2
XS
EG
=
3
XS
EG
=
1
XS
EG
=
0
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