HD44780 Hitachi Semiconductor (acquired by Renesas), HD44780 Datasheet - Page 15

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

Table 2
Notes: 1. EPROM addresses A11 to A4 correspond to a character code.
Programming character patterns
This section explains the correspondence between addresses and data used to program character patterns
in EPROM. The HD44780U character generator ROM can generate 208 5 8 dot character patterns and
32 5 10 dot character patterns for a total of 240 different character patterns.
A 1 1
Character patterns
EPROM address data and character pattern data correspond with each other to form a 5
10 dot character pattern (Tables 2 and 3).
2. EPROM addresses A3 to A0 specify a line position of the character pattern.
3. EPROM data O4 to O0 correspond to character pattern data.
4. EPROM data O5 to O7 must be specified as 0.
5. A lit display position (black) corresponds to a 1.
6. Line 9 and the following lines must be blanked with 0s for a 5
0
A 1 0 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0
1
Example of Correspondence between EPROM Address Data and Character Pattern
(5
Character code
1
8 Dots)
0
EPROM Address
0
0
1
0
1
0
1
0
1
1
1
1
0
0
0
0
1
1
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
0
0
Line
position
1
1
1
1
0
1
0
0
0
1
0
0
0
1
0
1
0
0
1
1
1
1
0
1
1
1
0
1
0
0
0
0
O 4 O3 O2 O1 O0
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
0
0
1
0
0
1
0
0
0
0
0
0
0
0
0
Data
0
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
0
0
1
0
0
0
1
0
0
0
0
0
0
0
0
0
LSB
0
0
0
1
1
1
0
0
0
0
0
0
0
0
0
0
8 dot character fonts.
Cursor position
HD44780U
8 or 5
15