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SPECIFICATIONS FOR LIQUID CRYSTAL DISPLAY MODULE
MODEL NO: 12864-12
PACIFIC DISPLAY DEVICES
07.21.2006
18
● Mode Set
Code
Function
Operand
1000x000
"OR" Mode
---
1000x001
"EXOR" Mode
---
1000x011
"AND" Mode
---
1000x100
"TEXT ATTRIBUTE" Mode
---
10000xxx
Internal Character Generator Mode
---
10001xxx
External Character Generator Mode
---
x : Don’t care
The display mode is defined by this command. The display mode don’t have changed until to send next this command.
Logically "OR" , "EXOR", "AND" of text and graphic dispaly can be displayed.
When internal character generator mode is selected, character code 00H~7FH are selected from built-in character
generator ROM. The character code 80H~FFH are automatically selected external character generator RAM.
(Example)
Graphic
Text
"OR"
"AND"
"EXOR"
Note : Only text display is attributed, because attribute data is located in graphic RAM area.
Attribute function
"Reverse display", "Character blink" and "Inhibit" are called "Attribute". The attribute data is written in the graphic
area defined by control word set command. The mode set command selects text display only and graphic display cannot be
displayed.
The attribute data of the lst character in text area is written at the lst byte in graphic area, and attribute data of n-th
character is written at the n-th byte in graphic area. Attribute function is defined as follow.
Attribute RAM byte
x
x
x
x
d3
d2
d1
d0
d3
d2
d1
d0
Function
0
0
0
0
Normal display
0
1
0
1
Reverse display
0
0
1
1
Inhibit display
1
0
0
0
Blink of normal display
1
1
0
1
Blink of reverse display
1
0
1
1
Blink of inhibit display
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