GU-3900B series “General Function” Software Specification
4.7.3
Command Set
4.7.3.1
General setting commands
Command Name
Hex Code
Operation
Page
Brightness level setting
1Fh,58h,n
Default: n=04h or
Memory SW
setting.
Set brightness level for entire display screen.
n=00h:
0%
n=01h:
25%
n=02h:
50%
n=03h:
75%
n=04h:
100%
n=10h:
0%
n=11h:
12.5%
n=12h:
25%
n=13h:
37.5%
n=14h:
50%
n=15h:
62.5%
n=16h:
75%
n=17h:
87.5%
n=18h:
100%
p25
Initialize Display
1Bh,40h
Clear entire display screen and initialize all settings.
p25
Cursor set
1Fh,24h,xL,xH,
yL,yH
Cursor moves to specified x,y position on Display
Memory.
xL:
Cursor position x, lower byte
xH:
Cursor position x, upper byte
yL:
Cursor position y, lower byte
yH:
Cursor position y, upper byte
p25
Cursor display
1Fh,43h,n
Default: n=00h
Cursor display ON/OFF select.
n=00h: Cursor OFF
n=01h: Cursor ON
p25
4.7.3.2
Character display setting commands
Command Name
Hex Code
Operation
Page
Write screen mode select
1Fh,28h,77h,10h,a
Default: a=00h or
Memory SW
setting.
Sets the write screen mode for base window.
a=00h: Display screen mode
a=01h: All screen mode
p26
International font set
1Bh,52h,n
Default: n=00h or
Memory SW
setting.
Some characters codes within the range 20h – 7Fh are
selected from the types listed below.
n=00h: America
n=01h: France
n=02h: Germany
n=03h: England
n=04h: Denmark 1
n=05h: Sweden
n=06h: Italy
n=07h: Spain1
n=08h: Japan
n=09h: Norway
n=0Ah: Denmark2
n=0Bh: Spain2
n=0Ch: Latin America
n=0Dh: Korea
p26
Character Table type
1Bh,74h,n
Default: n=00h or
Memory SW
setting.
Character codes in the range 80h – FFh are selected
from the types listed below.
n=00h: PC437 (USA: Standard Europe)
n=01h: Katakana
n=02h: PC850 (Multilingual)
n=03h: PC860 (Portuguese)
n=04h: PC863 (Canadian-French)
n=05h: PC865 (Nordic)
n=10h: WPC1252
n=11h: PC866 (Cyrillic #2)
n=12h: PC852 (Latin 2),
n=13h: PC858
n=FFh: User table
p27
Over-write mode
1Fh,01h
Set Over-write mode.
p27
Vertical scroll mode
1Fh,02h
Set Vertical scroll mode.
p27
Horizontal scroll mode
1Fh,03h
Set Horizontal scroll mode.
p27
Horizontal scroll mode Scroll
ON
1Fh,05h
Set Horizontal scroll mode Scroll ON.
p27
Horizontal scroll speed
1Fh,73h,n
Default: n=00h or
Memory SW
setting.
Set Horizontal scroll speed.
p27
Font size select
1Fh,28h,67h,01h,
m
Default: m=01h or
Memory SW
setting.
Select font size of a character.
m=01h: 6×8 font
m=02h: 8×16 font
m=03h: 12×24 font
m=04h: 16×32 font
p28
2-byte character
1Fh,28h,67h,02h,
m
Default: m=00h or
Memory SW
setting.
Sets 2-byte character ON/OFF.
m=01h: 2-byte character mode ON
m=00h: 2-byte character mode OFF
p28
- 17
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