lm9617 National Semiconductor Corporation, lm9617 Datasheet - Page 12
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lm9617
Manufacturer Part Number
lm9617
Description
Monochrome Cmos Image Sensor Vga 30 Fps
Manufacturer
National Semiconductor Corporation
Datasheet
1.LM9617.pdf
(37 pages)
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Functional Description
4.0
4.1
The timing and control circuit can be programmed to sub-sam-
ple pixels in the display window vertically, horizontally or both,
with an aspect ratio of 2:1 as illustrated in Figure16
Confidential
Figure 16: 2:1 Horizontal and Vertical Sub-Sampling
9
SUBSAMPLING MODES
2:1 Sub-Sampling
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a b c d e f g h i j k l m n o p
a b c d e f g h i j k l l n o p q r
a b c d e f g h i j k l m n o p q r
Read Out
c) Horizontal & Vertical Sub-Sampling
a) Horizontal Sub-Sampling
Column/Horizontal
b) Vertical Sub-Sampling
Column/Horizontal
Column/Horizontal
(continued)
Not Read Out
q r
12
4.2
The timing and control circuit can be programmed to sub-sam-
ple pixels in the display window vertically, horizontally or both,
with an aspect ratio of 4:2 as illustrated in Figure17.
Figure 17: 4:2 Horizontal and Vertical Sub-Sampling
0
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a b c d e f g h i j k l m n o p q r
a b c d e f g h i j k l m n o p q r
a b c d e f g h i j k l m n o p q r
4:2 Sub-Sampling
Read Out
c) Horizontal & Vertical Sub-sampling
a) Horizontal Sub-sampling
Column/Horizontal
b) Vertical Sub-sampling
Column/Horizontal
Column/Horizontal
Not Read Out
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