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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)： | 31/59頁 |
| 文件大?。?/td> | 316K |
| 代理商： | HCD44780UA02 |
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HD44780U
31
Write Data to CG or DDRAM
Write data to CG or DDRAM writes 8-bit binary data DDDDDDDD to CG or DDRAM.
To write into CG or DDRAM is determined by the previous specification of the CGRAM or DDRAM
address setting. After a write, the address is automatically incremented or decremented by 1 according to
the entry mode. The entry mode also determines the display shift.
Read Data from CG or DDRAM
Read data from CG or DDRAM reads 8-bit binary data DDDDDDDD from CG or DDRAM.
The previous designation determines whether CG or DDRAM is to be read. Before entering this read
instruction, either CGRAM or DDRAM address set instruction must be executed. If not executed, the first
read data will be invalid. When serially executing read instructions, the next address data is normally read
from the second read. The address set instructions need not be executed just before this read instruction
when shifting the cursor by the cursor shift instruction (when reading out DDRAM). The operation of the
cursor shift instruction is the same as the set DDRAM address instruction.
After a read, the entry mode automatically increases or decreases the address by 1. However, display shift
is not executed regardless of the entry mode.
Note:
The address counter (AC) is automatically incremented or decremented by 1 after the write
instructions to CGRAM or DDRAM are executed. The RAM data selected by the AC cannot be
read out at this time even if read instructions are executed. Therefore, to correctly read data,
execute either the address set instruction or cursor shift instruction (only with DDRAM), then just
before reading the desired data, execute the read instruction from the second time the read
instruction is sent.
RS
1
R/W
1
DB7
D
DB6
D
DB5
D
DB4
D
DB3
D
Code
DB2
D
DB1
D
DB0
D
Higher
order bits
Lower
order bits
RS
1
R/W
0
DB7
D
DB6
D
DB5
D
DB4
D
DB3
D
Code
DB2
D
DB1
D
DB0
D
Higher
order bits
Lower
order bits
Read data from
CG or DDRAM
Write data to
CG or DDRAM
Figure 14 Instruction (3)
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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 |
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| 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 |
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