ML9042 Просмотр технического описания (PDF) - LAPIS Semiconductor Co., Ltd.

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ML9042

DOT MATRIX LCD CONTROLLER DRIVER

LAPIS Semiconductor Co., Ltd. 

LAPIS Semiconductor

FEDL9042-01

ML9042-xx

Display Data RAM (DDRAM)

This RAM stores the 8-bit character codes (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.

ADC

DB6 DB5 DB4 DB3 DB2 DB1 DB0

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 ML9042 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 position and the DDRAM address changes as shown below:

Digit

1 234

(Display shifted to the right) 4F 00 01 02

19 20

11 12

Digit

12 34 5

(Display shifted to the left) 01 02 03 04 05

19 20

13 14

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