HD44780U Hitachi Semiconductor (acquired by Renesas), HD44780U Datasheet - Page 12

• Manufacturer Part Number: HD44780U
• Description: Dot Matrix Liquid Crystal Display Controller/driver
• Manufacturer: Hitachi Semiconductor (acquired by Renesas)

HD44780U
178
2-line display (N = 1) (Figure 4)
Case 1: When the number of display characters is less than 40 2 lines, the two lines are
displayed from the head. Note that the first line end address and the second line start address are
not consecutive. For example, when just the HD44780 is used, 8 characters
See Figure 5.
When display shift operation is performed, the DDRAM address shifts. See Figure 5.
Figure 5 2-Line by 8-Character Display Example
Display
position
DDRAM
address
(hexadecimal)
00 01
40 41
Display
position
DDRAM
address
For
shift left
For
shift right
1
Figure 4 2-Line Display
2
02
42
3
00 01 02 03 04 05 06 07
40 41 42 43 44 45 46 47
01 02 03 04 05 06 07 08
41 42 43 44 45 46 47 48
27
67
1
03 04
43 44
00 01 02 03 04 05 06
40 41 42 43 44 45 46
4
2
3
5
4
. . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . .
5
6
7
8
26 27
66 67
39
40
2 lines are displayed.