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PDF HD44780U Data sheet ( Hoja de datos )
| Número de pieza | HD44780U | |
| Descripción | Dot Matrix Liquid Crystal Display Controller/Driver | |
| Fabricantes | Hitachi | |
| Logotipo |  |
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HD44780U (LCD-II)
(Dot Matrix Liquid Crystal Display Controller/Driver)
ADE-207-272(Z)
'99.9
Rev. 0.0
Description
The HD44780U dot-matrix liquid crystal display controller and driver LSI displays alphanumerics,
Japanese kana characters, and symbols. It can be configured to drive a dot-matrix liquid crystal display
under the control of a 4- or 8-bit microprocessor. Since all the functions such as display RAM, character
generator, and liquid crystal driver, required for driving a dot-matrix liquid crystal display are internally
provided on one chip, a minimal system can be interfaced with this controller/driver.
A single HD44780U can display up to one 8-character line or two 8-character lines.
The HD44780U has pin function compatibility with the HD44780S which allows the user to easily replace
an LCD-II with an HD44780U. The HD44780U character generator ROM is extended to generate 208 5 ×
8 dot character fonts and 32 5 × 10 dot character fonts for a total of 240 different character fonts.
The low power supply (2.7V to 5.5V) of the HD44780U is suitable for any portable battery-driven product
requiring low power dissipation.
Features
• 5 × 8 and 5 × 10 dot matrix possible
• Low power operation support:
2.7 to 5.5V
• Wide range of liquid crystal display driver power
3.0 to 11V
• Liquid crystal drive waveform
A (One line frequency AC waveform)
• Correspond to high speed MPU bus interface
2 MHz (when VCC = 5V)
• 4-bit or 8-bit MPU interface enabled
• 80 × 8-bit display RAM (80 characters max.)
• 9,920-bit character generator ROM for a total of 240 character fonts
208 character fonts (5 × 8 dot)
32 character fonts (5 × 10 dot)
1
1 page  
HD44780U Pin Arrangement (TFP-80F)
SEG20 1
SEG19 2
SEG18 3
SEG17 4
SEG16 5
SEG15 6
SEG14 7
SEG13 8
SEG12 9
SEG11 10
SEG10 11
SEG9 12
SEG8 13
SEG7 14
SEG6 15
SEG5 16
SEG4 17
SEG3 18
SEG2 19
SEG1 20
TFP-80F
(Top view)
HD44780U
60 COM16
59 COM15
58 COM14
57 COM13
56 COM12
55 COM11
54 COM10
53 COM9
52 COM8
51 COM7
50 COM6
49 COM5
48 COM4
47 COM3
46 COM2
45 COM1
44 DB7
43 DB6
42 DB5
41 DB4
5
5 Page 
HD44780U
• 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
123 45
DDRAM
00 01 02 03 04 . . . . . . . . . . . . . . . . . .
address
(hexadecimal) 40
41
42
43
44
..................
39 40
26 27
66 67
Figure 4 2-Line Display
Display
position
12345678
DDRAM 00 01 02 03 04 05 06 07
address
40 41 42 43 44 45 46 47
For
shift left
01 02 03 04 05 06 07 08
41 42 43 44 45 46 47 48
For 27 00 01 02 03 04 05 06
shift right
67 40 41 42 43 44 45 46
Figure 5 2-Line by 8-Character Display Example
11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet HD44780U.PDF ] | |
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