Supported Grayscale; Table 14-4. Stn Intensities From Grayscale Modulation; Table 14-5. Lcd Controller Grayscale Support - Sharp Blue Treak LH75400 User Manual

Liquid Crystal Display Controller
The LCDC has four individually maskable interrupt conditions going to a single combined
interrupt. The single combined interrupt is asserted if any of the combined interrupt condi-
tions are asserted and unmasked.

14.2.6 Supported Grayscale

Table 14-5 shows the number of LCDC supported grayscales.
14-6

Table 14-4. STN Intensities From Grayscale Modulation

4-BIT PALETTE VALUE
0b0000
0b0001
0b0010
0b0011
0b0100
0b0101
0b0110
0b0111
0b1000
0b1001
0b1010
0b1011
0b1100
0b1101
0b1110
0b1111
NOTES:
1. Duty cycle is determined by (pixels on ÷ (pixels on + pixels off)).
2. Resulting intensity: 000% = black, 100% = white.

Table 14-5. LCD Controller Grayscale Support

bpp
1 bpp
2 bpp
4 bpp
8 bpp
12 bpp
NOTES:
1. Grayscales selected from 15 grayscales.
2. Greater than four bpp can be programmed; however, using
these modes does not make sense, since the maximum
number of grayscales supported on this display is 15.
LH75400/01/10/11 (Preliminary) User's Guide
1
DUTY CYCLE
0/90
10/90
18/90
24/90
30/90
36/90
40/90
45/90
45/90
50/90
54/90
60/90
66/90
72/90
80/90
90/90
MONO STN
Palletized 2 shades
Palletized 4 shades
Palletized 16 shades
/// ///
/// ///
6/17/03
RESULTING
2
INTENSITY
00.0%
11.1%
20.0%
26.7%
33.3%
40.0%
44.4%
50.0%
50.0%
55.6%
60.0%
66.6%
73.3%
80.0%
88.9%
100.0%
NOTES
1
1
1
2
2