HD66750 Datasheet, PDF (75/96 Pages) Hitachi Semiconductor – 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions

HD66750/1
Double-height Display Function
The HD66750/1 can double the height of any desired area in units of raster-rows (dots). The double-height
display is done by setting the DHE bit in the display control register to 1.
The start position of the double-height display is set by the DS6 to DS0 bits of the double-height display
position register, and the double-height display starts at the (the setting value plus one)-th raster-row. The
end position is set by the DE6 to DE0 bits of the double-height display position register, and the display ends
at the (the setting value plus one)-th raster-row. Here, the end position of the double-height display must be
after the start position, so set the register setting values so that
DS6-0 ≤ DE6-0. When the area specified to be doubled in height is an odd number of raster-rows, the
double-height display is done up to the (DE6-0 plus one)-th raster-row.
In vertical smooth scrolling, the double-height display position does not automatically move up or down.
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