HD66730 Datasheet, PDF (101/131 Pages) Hitachi Semiconductor – Dot-Matrix Liquid Crystal Display Controller/Driver Supporting Japanese Kanji, Korean Font Display

HD66730/HD66731
Examples of Register Setting (2-Line Liquid Crystal Drive: DT1/0 = 01, 4-Line
Display Mode: NL1/0 = 11)
R/W RS DB7 DB6 DB5 DB4 DB3 DB2 DB1 DB0
10 0000001 01
20 1000000 01
CPU Wait
30 1000000 10
CPU Wait
40 1000000 11
CPU Wait
Index register set (R5 designation)
Scrolls one raster-row up
(Begins display from the second raster-row of the first line)
Scrolls two raster-rows up
(Begins display from the third raster-row of the first line)
Scrolls three raster-rows up
(Begins display from the fourth raster-row of the first line)
13 0 1 0 0 0 0 1 1 0 0
CPU Wait
14 0 1 0 0 1 0 0 0 0 0
CPU Wait
Scrolls 12 raster-rows up
(Begins display from the 13th raster-row of the first line)
Scrolls 13 raster-rows up
(Begins display from the first raster-row of the second line
and displays the second and third lines)
26 0 1 0 0 1 0 1 1 0 0
CPU Wait
27 0 1 0 1 0 0 0 0 0 0
CPU Wait
Scrolls 25 raster-rows up
(Begins display from the 13th raster-row of the second line)
Scrolls 26 raster-rows up
(Begins display from the first raster-row of the third line
and displays the third and fourth lines)
Note: The DDRAM has 80 bytes. For a 4-line display mode, a 4-line 10-character/line display can
therefore be performed. Although the line and raster-row for scrolling can be designated as desired,
the first raster-row of the first line will be displayed after displaying raster-row 13 of line 4.
Figure 33 Example of Performing Smooth Scroll Up
100