- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370444 > HCD44780UA02 (Hitachi,Ltd.) 320 x 240 pixel format, CFL backlight available with power harness PDF資料下載
參數(shù)資料
| 型號(hào)： | HCD44780UA02 |
| 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 |
| 文件頁數(shù)： | 9/59頁 |
| 文件大小： | 316K |
| 代理商： | HCD44780UA02 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁當(dāng)前第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁
HD44780U
9
Function Description
Registers
The HD44780U has two 8-bit registers, an instruction register (IR) and a data register (DR).
The IR stores instruction codes, such as display clear and cursor shift, and address information for display
data RAM (DDRAM) and character generator RAM (CGRAM). The IR can only be written from the MPU.
The DR temporarily stores data to be written into DDRAM or CGRAM and temporarily stores data to be
read from DDRAM or CGRAM. Data written into the DR from the MPU is automatically written into
DDRAM or CGRAM by an internal operation. The DR is also used for data storage when reading data
from DDRAM or CGRAM. When address information is written into the IR, data is read and then stored
into the DR from DDRAM or CGRAM by an internal operation. Data transfer between the MPU is then
completed when the MPU reads the DR. After the read, data in DDRAM or CGRAM at the next address is
sent to the DR for the next read from the MPU. By the register selector (RS) signal, these two registers can
be selected (Table 1).
Busy Flag (BF)
When the busy flag is 1, the HD44780U is in the internal operation mode, and the next instruction will not
be accepted. When RS = 0 and R/
W
= 1 (Table 1), the busy flag is output to DB7. The next instruction
must be written after ensuring that the busy flag is 0.
Address Counter (AC)
The address counter (AC) assigns addresses to both DDRAM and CGRAM. When an address of an
instruction is written into the IR, the address information is sent from the IR to the AC. Selection of either
DDRAM or CGRAM is also determined concurrently by the instruction.
After writing into (reading from) DDRAM or CGRAM, the AC is automatically incremented by 1
(decremented by 1). The AC contents are then output to DB0 to DB6 when RS = 0 and R/
W
= 1 (Table 1).
Table 1
Register Selection
RS
R/
W
Operation
0
0
IR write as an internal operation (display clear, etc.)
0
1
Read busy flag (DB7) and address counter (DB0 to DB6)
1
0
DR write as an internal operation (DR to DDRAM or CGRAM)
1
1
DR read as an internal operation (DDRAM or CGRAM to DR)
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HCD61202U | Dot Matrix Liquid Crystal GraphicDisplay Column Driver |
| HCD61203U | Power Darlington Bipolar Transistor; Collector Emitter Voltage, Vceo:100V; Transistor Polarity:NPN; Power Dissipation:65W; C-E Breakdown Voltage:100V; DC Current Gain Min (hfe):100; Collector Current:10A; Package/Case:3-TO-220 |
| HCD66108BP | Driver IC; Package/Case:16-DIP; Mounting Type:Through Hole |
| HCD66204 | DOT MATRIX LIQUID CRYSTAL GRAPHIC DISPLAY COLUMN DRIVER WITH 80-CHANNEL OUPUTS |
| HCD66204L | DOT MATRIX LIQUID CRYSTAL GRAPHIC DISPLAY COLUMN DRIVER WITH 80-CHANNEL OUPUTS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| HCD44780UBXX | 制造商:HITACHI 制造商全稱:Hitachi Semiconductor 功能描述:Dot Matrix Liquid Crystal Display Controller/Driver |
| HCD48-3318-75 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC to DC Converter |
| HCD48-3318-75R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC to DC Converter |
| HCD48-3325-75 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC to DC Converter |
| HCD48-3325-75R | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:DC to DC Converter |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。