HD44780 Hitachi Semiconductor (acquired by Renesas), HD44780 Datasheet - Page 11

• Manufacturer Part Number: HD44780
• Description: Dot Matrix Liquid Crystal Display Controller/driver
• Manufacturer: Hitachi Semiconductor (acquired by Renesas)

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 2 lines are displayed. See
Figure 5.
When display shift operation is performed, the DDRAM address shifts. See Figure 5.
Display
position
DDRAM
address
(hexadecimal)
Figure 5 2-Line by 8-Character Display Example
00 01
40 41
Display
position
DDRAM
address
For
shift left
For
shift right
1
2
Figure 4 2-Line Display
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
HD44780U
11