MC141622P Просмотр технического описания (PDF) - Motorola => Freescale
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MC141622P Datasheet PDF : 16 Pages
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digital value of the clamp level ($04) with the ND convetier
output code, The clamp voltage from CLout is then output.
Advanced Comb Filter-n
The Advanced Comb Filter-n is a digital comb filter devel-
oped for use in the NTSC system. The vertical correlation cir-
cuit provides high picture quality and high resolution and
requires no adjustment for its Y/C separation. The clock fre-
quency is 14.3 MHz, which is four times the NTSC subcar-
rier.
The BK pin can be used to select between the composite
signal output without Y/C separation and the Y/C signal out-
put. Table 1 shows the relationship of the BK pin and each
output.
Table 1. BK Function
‘1
Adaptive Vertical Enhancer Circuit
crawl. This block does not emphasize horizontal and vertical
sync signals. Table 2 shows the relationship of ,the VH pin
and the veflical enhancer function, The coring characteristics
of the vertical enhancer circuit can be set up on the digital
port at the normal mode.
Table 2. VH Function
sg:.;y.~l<t~,
-~
D/A Converter
\&$., ,,.i,$..*:,p”,.:>~’>*’:,-,:,:’
The luminance and chrominance@#~’&eparated
in the
advanced comb filtering potion ar~:;~o,$~etied to analog sig-
nals by two 8–bit D/A convetie[@+t~heMutput voltage range is
from 0.3 V to 1.5 V, 1.2 Vp+,’~fi~:sampling clock of the D/A
converter is 143 MHz ,-F 7:*$
ClockGeneration=
The internal R&&caribe
“
selected to operate in either of two
a
a
C7
C6
C5
C4
C3
C2
cl
co
D7
D6
D5
D4
Level
L
L
L
L
o
L
L
L
H
1
L
L
H
L
2
L
L
H
H,
3
L
H
L
L
4
L
H
L
H
5
L
H
H
L
6
L
H
H
H
7
H
L
L
L
8
H
L
L
H
9
H
L
H
L
10
“H
L
H
H
11
H
H
L
L
12
H
H
L
H
13
H
H
H
L
14
H
H
H
H
15
Figure 3. Coring Characteristics
MOTOROLA
,.
MC141 622
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