LCD Controller Operation
LCD Controller 8-7
Since crystal formulations and driving voltages vary, the visual grayscal e effect may o r may not be linearl y
related to the frame rate. For certain types of gr aphics, a logarithmic scale like zero, one-fourth, one-half,
and one might be more visually pleasing than a linearly spaced scale like zero, five-sixteenths,
eleven-sixteenths, and one. This flexible map ping scheme allows optimizing the visual effect for the
specific panel or application during a four-level grayscale display mode.
NOTE:
The Controlling Frame Rate Modulation function available in previous
versions of the DragonBall integrated processor is not available in the
MC68VZ328.
Table 8-1. Grey Palette Density
Gray Code (Hex) Density Density (in Decimal)
00 0
11/8 0.125
21/5 0.2
31/4 0.25
41/3 0.333
52/5 0.4
64/9 0.444
71/2 0.5
85/9 0.555
93/5 0.6
A2/3 0.666
B3/4 0.75
C4/5 0.8
D7/8 0.875
E 14/15 0.933
F1 1