參數(shù)資料
型號(hào): LM9617CCEA-2
廠商: NATIONAL SEMICONDUCTOR CORP
元件分類(lèi): 模擬信號(hào)調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, CQCC48
封裝: LCC-48
文件頁(yè)數(shù): 4/40頁(yè)
文件大?。?/td> 408K
代理商: LM9617CCEA-2
Confidential
12
www.national.com
Functional Description (continued)
4.0
SUBSAMPLING MODES
4.1
2:1 Sub-Sampling
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
0
1
2
3
4
5
6
7
8
9
Column/Horizontal
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
0
1
2
3
4
5
6
7
8
9
b) Vertical Sub-Sampling
R
o
w
/V
e
rt
ic
a
l
Column/Horizontal
q r
a b c d e f g h i
j k l m n o p q r
0
1
2
3
4
5
6
7
8
Column/Horizontal
R
o
w
/V
e
rt
ic
a
l
9
a) Horizontal Sub-Sampling
c) Horizontal & Vertical Sub-Sampling
Read Out
Not Read Out
R
o
w
/V
e
rt
ic
a
l
Figure 16: 2:1 Horizontal and Vertical Sub-Sampling
4.2
4:2 Sub-Sampling
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.
Column/Horizontal
a) Horizontal Sub-sampling
Read Out
Not Read Out
a b c d e f g h i
j k l m n o p q r
0
1
2
3
4
5
6
7
8
9
R
o
w
/V
e
rt
ic
a
l
a b c d e f g h i
j k l m n o p q r
0
1
2
3
4
5
6
7
8
9
Column/Horizontal
R
o
w
/V
e
rt
ic
a
l
a b c d e f g h i
j k l m n o p q r
0
1
2
3
4
5
6
7
8
9
Column/Horizontal
R
o
w
/V
e
rt
ic
a
l
c) Horizontal & Vertical Sub-sampling
b) Vertical Sub-sampling
Figure 17: 4:2 Horizontal and Vertical Sub-Sampling
L
M
9
6
1
7
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