參數(shù)資料
型號(hào)： HD44780UBxxFS
廠商： Hitachi,Ltd.
英文描述： 320 x 240 pixel format, CFL backlight available with power harness
中文描述： 點(diǎn)陣式液晶顯示控制器/驅(qū)動(dòng)器
文件頁(yè)數(shù)： 21/59頁(yè)
文件大?。?/td> 316K
代理商： HD44780UBXXFS
HD44780U
21
Timing Generation Circuit
The timing generation circuit generates timing signals for the operation of internal circuits such as
DDRAM, CGROM and CGRAM. RAM read timing for display and internal operation timing by MPU
access are generated separately to avoid interfering with each other. Therefore, when writing data to
DDRAM, for example, there will be no undesirable interferences, such as flickering, in areas other than the
display area.
Liquid Crystal Display Driver Circuit
The liquid crystal display driver circuit consists of 16 common signal drivers and 40 segment signal
drivers. When the character font and number of lines are selected by a program, the required common
signal drivers automatically output drive waveforms, while the other common signal drivers continue to
output non-selection waveforms.
Sending serial data always starts at the display data character pattern corresponding to the last address of
the display data RAM (DDRAM).
Since serial data is latched when the display data character pattern corresponding to the starting address
enters the internal shift register, the HD44780U drives from the head display.
Cursor/Blink Control Circuit
The cursor/blink control circuit generates the cursor or character blinking. The cursor or the blinking will
appear with the digit located at the display data RAM (DDRAM) address set in the address counter (AC).
For example (Figure 8), when the address counter is 08H, the cursor position is displayed at DDRAM
address 08H.
AC6
0
AC5
0
AC4
0
AC3
1
AC2
0
AC1
0
AC0
0
1
00
2
01
3
02
4
03
5
04
6
05
7
06
8
07
9
08
10
09
11
0A
1
00
40
2
01
41
3
02
42
4
03
43
5
04
44
6
05
45
7
06
46
8
07
47
9
08
48
10
09
49
11
0A
4A
AC
cursor position
cursor position
Display position
DDRAM address
(hexadecimal)
Display position
DDRAM address
(hexadecimal)
For a 1-line display
For a 2-line display
Note: The cursor or blinking appears when the address counter (AC) selects the character
generator RAM (CGRAM). However, the cursor and blinking become meaningless.
The cursor or blinking is displayed in the meaningless position when the AC is a CGRAM address.
Figure 8 Cursor/Blink Display Example
相關(guān)PDF資料
PDF描述
HD44780UBxxTF 320 x 240 pixel format, LED or CFL Backlight
HD44780 Dot Matrix Liquid Crystal Display Controller/Driver
HD44780U Dot Matrix Liquid Crystal Display Controller/Driver
HD44780UA00FS 320 x 240 pixel format, CFL backlight available with power harness
HD44780UA00TF 320 x 240 pixel format, CFL backlight available with power harness
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
HD44780UBXXTF 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot Matrix Liquid Crystal Display Controller/Driver
HD44790 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit CMOS Microcomputer
HD44795 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:4-Bit CMOS Microcomputer
HD44797E 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller
HD447-GM-358 功能描述:顯示開(kāi)發(fā)工具 HD44780 CONTROLLER GADGETEER MODULE RoHS:否 制造商:4D Systems 產(chǎn)品:4Display Shields 工具用于評(píng)估:?OLED-160-G1, ?OLED-160-G2 接口類(lèi)型:Serial 工作電源電壓:5 V
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