HD66750 Datasheet, PDF (70/96 Pages) Hitachi Semiconductor – 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions

HD66750/1
Partial Smooth Scroll Display Function
The HD66750/1 can partially fixed-display the areas of a graphics icon such as a pictogram or a menu bar,
and perform vertical smooth scrolling of the remaining bit-map areas. Since the PS1 to PS0 bits are not used
for smooth scrolling of the upper first to 24th display raster-rows but are used for fixed-display, pictograms
can be placed on the screen. This function can largely control the rewrite frequencies of the bit-map data
during smooth scrolling and reduce the software load of the MPU.
70