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Liquid Crystal Display Controller (LCDC)
.
21.4.8
Frame Rate Modulation Control (FRC)
Circuitry inside the LCDC generates intermediate gray-scale colors on the panel by adjusting the density
of zeroes and ones that appear over the frames. The LCDC can generate 16 simultaneous gray-scale levels.
21-36
7 6 5 4 3 2 1 0
1 0
1
1
1 1 0 0
1
1
0
1
0 1 0 1
1
1
0
0 1 1 0 1 1 1 0 1
R
G
0
1
0
0
1 1
1
0
0 0 0
To Panel
Figure 21-34. Active Matrix Color Pixel Generation
Table 21-33. Gray Palette Density
Gray Code
(Hexadecimal)
0
1
2
3
4
5
6
7
8
9
A
B
MCF52277 Reference Manual, Rev. 1
4 bpp Data
8 bpp Data
12/16/18 bpp Data
B
Color
RAM
Inside
LCDC
256 Rows
1 1 1
0
1
0
1
Density
Density
(Decimal)
0
0
1/8
0.125
1/5
0.2
1/4
0.25
1/3
0.333
2/5
0.4
4/9
0.444
1/2
0.5
5/9
0.555
3/5
0.6
2/3
0.666
3/4
0.75
Freescale Semiconductor
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