HD44780 Hitachi Semiconductor (acquired by Renesas), HD44780 Datasheet - Page 12

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

HD44780U
12
Case 2: For a 16-character 2-line display, the HD44780 can be extended using one 40-output
extension driver. See Figure 6.
When display shift operation is performed, the DDRAM address shifts. See Figure 6.
For
shift left
For
shift right
Display
position
DDRAM
address
Figure 6 2-Line by 16-Character Display Example
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F
27
67
01
41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E 4F 50
1
HD44780U display
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E
40 41 42 43 44 45 46 47 48 49 4A 4B 4C 4D 4E
02
2
03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10
3
4 5
6
7
8 9 10 11 12 13 14 15 16
Extension driver
display