ML9041 查看數據表（PDF） - Oki Electric Industry

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ML9041

DOT MATRIX LCD CONTROLLER DRIVER

Oki Electric Industry 

¡ Semiconductor

ML9041

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.

DB6 DB5 DB4 DB3 DB2 DB1 DB0

ADC

MSB

LSB

Hexadecimal Hexadecimal

(Example) Representation of DDRAM address = 12

ADC

0 0 10 0 10

1

2

1) Relationship between DDRAM addresses and display positions (1–line display mode)

Digit

1234 5

00 01 02 03 04

19 20

12 13

Display position

DD RAM address (hexadecimal)

Left

Right

end

end

In the 1–line display mode, the ML9041 can display up to 20 characters from digit 1 to digit 20.

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:

Digit

1234

(Display shifted to the right) 4 F 0 0 0 1 0 2

19 20

11 12

(Display shifted to the left)

Digit

12345

01 02 03 04 05

19 20

13 14

17/54

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