HD44780 查看數據表（PDF） - Hitachi -> Renesas Electronics

零件编号

产品描述 (功能)

生产厂家

HD44780

Dot Matrix Liquid Crystal Display Controller/Driver

Hitachi -> Renesas Electronics 

HD44780U

• 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.

 Character patterns

EPROM address data and character pattern data correspond with each other to form a 5 × 8 or 5 ×

10 dot character pattern (Tables 2 and 3).

Table 2

Example of Correspondence between EPROM Address Data and Character Pattern

(5 × 8 Dots)

EPROM Address

Data

LSB

A 1 1A 1 0 A9 A8 A7 A6 A5 A4 A3 A2 A1 A0 O 4 O3 O2 O1 O0

0000 1 0 0 0 0

0001 1 0 0 0 0

0010 1 0 1 1 0

0011 1 1 0 0 1

0100 1 0 0 0 1

0101 1 0 0 0 1

0110 1 1 1 1 0

011000100111 0 0 0 0 0

1000 0 0 0 0 0

1001 0 0 0 0 0

Cursor position

1010 0 0 0 0 0

1011 0 0 0 0 0

1100 0 0 0 0 0

1101 0 0 0 0 0

1110 0 0 0 0 0

1111 0 0 0 0 0

Character code

Line

position

Notes: 1. EPROM addresses A11 to A4 correspond to a character code.

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 × 8 dot character fonts.

15

Share Link: