HD44780U Hitachi Semiconductor (acquired by Renesas), HD44780U Datasheet - Page 35

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

Interface to Liquid Crystal Display
Character Font and Number of Lines: The HD44780U can perform two types of displays, 5
and 5
Up to two lines are displayed for 5
types of common signals are available (Table 9).
The number of lines and font types can be selected by the program. (See Table 6, Instructions.)
Connection to HD44780 and Liquid Crystal Display: See Figure 20 for the connection examples.
Table 9
Number of Lines
1
1
2
10 dot character fonts, each with a cursor.
Common Signals
Figure 20 Liquid Crystal Display and HD44780 Connections
Character Font
5
5
5
HD44780
HD44780
8 dots + cursor
10 dots + cursor
8 dots + cursor
COM11
SEG40
SEG40
COM1
COM8
COM1
SEG1
SEG1
Example of a 5
Example of a 5
8 dots and one line for 5
8 dot, 8-character
10 dot, 8-character
Number of Common Signals
8
11
16
1-line display (1/4 bias, 1/8 duty cycle)
1-line display (1/4 bias, 1/11 duty cycle)
10 dots. Therefore, a total of three
1/8
1/11
1/16
Duty Factor
HD44780U
8 dot
201