GDM240128A Datasheet, PDF (20/29 Pages) List of Unclassifed Manufacturers – LCD MODULE

User’s Manual
Bottom right 80H, 80H, 80H, 8CH, 82H, 82H, 7EH, 00H
83H
Write into CGRAM
WRCG: MOV R2, #03H
MOV R3, #00H
MOV R4, #22H
; set offset register
LCALL WR
MOV DPTR, #TAB1
; matrix data home address
MOV R2, #00H
MOV R3, #1CH
; CGRAM address
MOV R4, #24H
; set address pointer
LCALL WR
MOV R4, #0B0H
; set auto write
LCALL WR2
MOV R2, #20H
; number of matrix data
WRCG1: LCALL BF3
; check status STA3
CLR A
MOVC A, @A+DPTR ; read matrix data
LCALL WR4
; write into CGRAM
INC DPTR
DJNZ R2, WRCG1
MOV R4, #0B2H
; auto reset
LCALL WR2
RET
TAB1: DB 04H, 04H, 04H, 04H, 04H, 7CH, 04H, 04H
DB 04H, 04H, 04H, 04H, 1CH, 0E4H, 44H, 00H
DB 80H, 80H, 88H, 98H, 0A0H, 0C0H, 80H, 80H
DB 80H, 80H, 80H, 80H, 82H, 82H, 7EH, 00H
5-8-4.Chinese Characters Display
Matrix data of Chinese character are in the sequence of top left corner（8 bytes
from top to bottom）Æ left bottom left corner（8 bytes from top to bottom）Ætop
right corner (8 bytes from top to bottom）Æbottom right corner(8 bytes from top
to bottom）.
（1） Display of Chinese Character in Text Mode
In this mode, only 64 Chinese characters with 16X16 dots can be entered as a
maximum. (4 character codes for a Chinese character)。
The address pointer is already positioned on the top left corner of the character
to be entered.
Register to be used: R2, R3, R4, A; input register: R3（store Chinese character
codes）
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