HD66750 Datasheet, PDF (31/96 Pages) Hitachi Semiconductor – 128 x 128-dot Graphics LCD Controller/Driver with Four-grayscale Functions

HD66750/1
Display Control
PS1Ð0: When PS1Ð0 = 01, only the upper eight raster-rows (COM1ÐCOM8) are fixed-displayed in vertical
smooth scrolling, and the other display raster-rows are smooth-scrolled. When PS1Ð0 = 10, the upper 16
raster-rows (COM1ÐCOM16) are fixed-displayed. When PS1Ð0 = 11, the upper 24 raster-rows (COM1Ð
COM24) are fixed-displayed. For details, see the Partial Smooth Scroll Display Function section.
DHE: When DHE = 1, the double height between raster-rows specified in the Double-height Display
Position section is displayed. For details, see the Double-height Display section.
GS: When GS = 0, the grayscale level at a weak-colored display (DB = 01) is 1/3. When GS = 1, the
grayscale level at weak-colored display is 1/2, and at strong-colored display (when DB = 10) it is 2/3.
REV: Displays all character and graphics display sections with black-and-white reversal when REV = 1.
For details, see the Reversed Display Function section.
D: Display is on when D = 1 and off when D = 0. When off, the display data remains in the CGRAM, and
can be displayed instantly by setting D = 1. When D is 0, the display is off with the SEG1 to SEG128
outputs and COM1 to COM128 outputs set to the GND level. Because of this, the HD66750/1 can control
the charging current for the LCD with AC driving.
R/W RS DB15 DB14 DB13 DB12 DB11 DB10 DB9 DB8 DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
0 1 * * * * * * * * * * PS1 PS0 DHE GS REV D
Figure 11 Display Control Instruction
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