CL-PS7110-VI-A View Datasheet(PDF) - Cirrus Logic
Part Name
Description
MFG CO.
'CL-PS7110-VI-A' PDF : 82 Pages View PDF
CL-PS7110
Low-Power System-on-a-Chip
word), similarly one bit per pixel means only the lower two nibbles are valid D[7:0] in the least-significant
word). The pixel-to-grayscale level assignments are shown in Table 3-14 and Table 3-15.
Table 3-14. Least-Significant Word Palette Assignments
31:28
27:24
23:20
19:16
15:12
11:8
7:4
3:0
Grayscale
value for
pixel value 7
Grayscale
value for
pixel value 6
Grayscale
value for
pixel value 5
Grayscale
value for
pixel value 4
Grayscale
value for
pixel value 3
Grayscale
value for
pixel value 2
Grayscale
value for
pixel value 1
Grayscale
value for
pixel value 0
PALMSW Most-Significant Word-LCD Palette Register
See PALLSW description in Section 3.2.27.
Table 3-15. Most-Significant Word Palette Assignments
31:28
Grayscale
value for
pixel value
15
27:24
Grayscale
value for
pixel value
14
23:20
Grayscale
value for
pixel value
13
19:16
Grayscale
value for
pixel value
12
15:12
Grayscale
value for
pixel value
11
11:8
Grayscale
value for
pixel value
10
7:4
3:0
Grayscale Grayscale
value for
value for
pixel value 9 pixel value 8
The actual physical color and pixel duty ratio for the grayscale values is shown in Table 3-16. Note that
colors 8–15 are the inverse of colors 7–0 respectively; this means that colors 7 and 8 are identical. The
steps in the grayscale are nonlinear but have been chosen to give a close approximation to perceived lin-
ear grayscales. The is due to the eye being more sensitive to changes in gray level close to 50% gray.
Table 3-16. Grayscale Value to Color Mapping
Grayscale
Value
0
1
2
3
4
5
6
7
8
9
10
11
Duty Cycle
0
1/9
1/5
4/15
3/9
2/5
4/9
1/2
1/2
5/9
3/5
6/9
% Pixels
Lit
0%
11.1%
20.0%
26.7%
33.3%
40.0%
44.4%
50.0%
50.0%
55.6%
60.0%
66.7%
% Step
change
11.1%
8.9%
6.7%
6.6%
6.7%
5.4%
5.6%
0.0%
5.6%
5.4%
6.7%
6.6%
May 1997
DATA BOOK v1.5
57
PROGRAMMING INTERFACE
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