GDM240128A Datasheet, PDF (19/29 Pages) List of Unclassifed Manufacturers – LCD MODULE

User’s Manual
MOV R3, #00H
MOV R4, #40H
LCALL WR
MOV R2, #1EH
MOV R3, #00H
MOV R4, #41H
LCALL WR
MOV R2, #00H
; set graphic area
MOV R3, #08H
MOV R4, #42H
LCALL WR
MOV R2, #1EH
MOV R3, #00H
MOV R4, #43H
LCALL WR
MOV R4, #80H
; set display mode
LCALL WR2
MOV R4, #94H
; text on
LCALL WR2
RET
The following is an example which is to display“！”in the top left corner of the
screen.
LCALL INI
MOV R2, #00H
MOV R3, #00H
MOV R4, #24H
LCALL WR
MOV R3, #01H
MOV R4, #0C0H
LCALL WR1
RET
5-8-3. Set CGRAM
Set offset register content
（1） Set the matrix data and character codes of the characters. For
example, the Chinese character “北”, choose the character codes
between 80H and FFH, then the matrix data and character codes
of the character “北” are defined as follows:
Structure of“北”
matrix data
character code
Top left
04H, 04H, 04H, 04H, 04H, 7CH, 04H, 04H
80H
Bottom left 04H, 04H, 04H, 04H, 1CH, E4H, 44H, 00H
81H
Top right
80H, 80H, 88H, 98H, A0H, C0H, 80H, 80H
82H
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