LM9617 datasheet(12/37 Pages) NSC

12 / 37 page

Confidential

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

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

k l m n o p

b) Vertical Sub-Sampling

Column/Horizontal

q r

a b c d e f g h i

j k l m n o p q r

Column/Horizontal

a) Horizontal Sub-Sampling

c) Horizontal & Vertical Sub-Sampling

Read Out

Not Read Out

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

a b c d e f g h i

j k l m n o p q r

Column/Horizontal

a b c d e f g h i

j k l m n o p q r

Column/Horizontal

c) Horizontal & Vertical Sub-sampling

b) Vertical Sub-sampling

Figure 17: 4:2 Horizontal and Vertical Sub-Sampling

LM9617 Datasheet(PDF) 12 Page - National Semiconductor (TI)

LM9617 Datasheet(HTML) 12 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37

Datasheet Download

Link URL