GDM240128A Datasheet, PDF (10/29 Pages) List of Unclassifed Manufacturers – LCD MODULE

User’s Manual
(Contents of the text area and of the graphic area are displayed on the
screen simultaneously by mode set.) and in attribute display of text mode.
（3） MPU can access the DDRAM at any time in the mode of byte / bit
（4）
（5）
operation.
Character Font: 6×8 dots or 8×8 dots
A status check must be performed before data or command are read or
written.
（6） Both the column/line counter and display register are cleared by RESET.
(Other registers are not cleared.) DDRAM is kept intact. Disable the
display using the clear-display register. After power on, it is necessary to
reset by software.
（7） By the hardware setting, display columns are defined 40 characters long,
（8）
（9）
maximum transferable amount of data every line.
Display lines are defined 128 by hardware setting.
This module has a 128-word character generator ROM (see appendix),
and allocation of external character generator RAM can be made easily in
DDRAM.
（10） DDRAM can be allocated to text area, graphic area and external
character area. The text home address and the graphic home address
correspond to the display bit on the top left corner of the LCD panel. In 6
×8 dot matrix, one byte in the text area corresponds to a character on
the screen. One byte in graphic area corresponds to 6×1 dot matrix on
the screen (The lower 6 bits of a byte are valid).
（11） Cursor display mode is on only in the text mode and what is displayed is
the logic OR of cursor and the character where the cursor is.
（12） For some commands that need operand data, it is important to send the
operand data first and then the command code.
（13） Text Attribute mode is only applicable in text mode. (In this case, text
mode and graphic mode should both be on.)
（14） The relationship between Text Area and display position in LCD panel is
shown below:
TH
TH+1
… TH+CL
TH+TA
TH+TA+1
… TH+TA+CL
(TH+TA）+TA
(TH+TA）+TA+1
… TH+2TA+CL
(TH+2TA）+TA (TH+2TA）+TA+1 … TH+3TA+CL
…
…
……
TH+15TA
TH+15TA+1
… TH+15TA+CL
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