參數(shù)資料
型號: ML9044
廠商: OKI SEMICONDUCTOR CO., LTD.
英文描述: DOT MATRIX LCD CONTROLLER DRIVER
中文描述: 點陣LCD控制器驅(qū)動
文件頁數(shù): 17/55頁
文件大?。?/td> 538K
代理商: ML9044
Semiconductor
ML9044
17/54
Display Data RAM (DDRAM)
This RAM stores the display data represented in 8–bit character coding (see Table 2).
The DDRAM addresses correspond to the display positions (digits) of the LCD as shown below.
The DDRAM addresses (to be set in the ADC) are represented in hexadecimal.
MSB
LSB
DB
6
DB
5
DB
4
DB
3
DB
2
DB
1
DB
0
Hexadecimal
Hexadecimal
2
0
ADC
0
1
0
0
1
0
1
ADC
(Example) Representation of DDRAM address = 12
00 01 02 03 04
16 17
Digit
1
2
3
4
5
23 24
Left
end
Right
end
Display position
DD RAM address (hexadecimal)
4F 00 01 02
15 16
Digit
1
2
3
4
23 24
(Display shifted to the right)
01 02 03 04
17 18
Digit
1
2
3
4
05
5
23 24
(Display shifted to the left)
1) Relationship between DDRAM addresses and display positions (1–line display mode)
In the 1–line display mode, the ML9044 can display up to 24 characters from digit 1 to digit 24.
While the DDRAM has addresses “00” to “4F” for up to 80 character codes, the area not used for
display can be used as a RAM area for general data. When the display is shifted by instruction,
the relationship between the LCD display and the DDRAM address changes as shown below:
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