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ST7920 Datasheet(PDF) 23 Page - Sitronix Technology Co., Ltd.

Part No. ST7920
Description  Chinese Fonts built in LCD controller/driver
Download  49 Pages
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Manufacturer  SITRONIX [Sitronix Technology Co., Ltd.]
Direct Link  http://www.sitronix.com.tw
Logo SITRONIX - Sitronix Technology Co., Ltd.

ST7920 Datasheet(HTML) 23 Page - Sitronix Technology Co., Ltd.

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ST7920
V4.0
23/49
2008/08/18
Description of extended instruction set
l
Standby
This Instruction will set ST7920 entering the standby mode. Any other instruction follows this instruction will
terminate the standby mode.
The content of DDRAM remains the same.
l
Vertical Scroll or RAM Address Select
When SR = "1", the Vertical Scroll mode is enabled.
When SR = "0",
“Set CGRAM Address” instruction (basic instruction) is enabled.
l
Reverse
Select 1 out of 4 lines to reverse the display and to toggle the reverse condition by repeating this instruction.
R1, R0 initial vale is 00. The first time issuing this instruction, the display will be reversed while the second time
will return the display become normal.
R1
R0
Description
L
L
First line normal or reverse
L
H
Second line normal or reverse
H
L
Third line normal or reverse
H
H
Fourth line normal or reverse
Please note that only 2 lines out of 4 lines of display data can be displayed with one ST7920.
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
Code
Code
Code
RS
RS
RS
RW
RW
RW
DB7
DB7
DB7
DB6
DB6
DB6
DB5
DB5
DB5
DB4
DB4
DB4
DB1
DB1
DB1
DB2
DB2
DB2
DB3
DB3
DB3
0
1
R1
1
SR
R0
DB0
DB0
DB0


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