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ST7920 Datasheet(PDF) 24 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) 24 Page - Sitronix Technology Co., Ltd.

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ST7920
V4.0
24/49
2008/08/18
l
Extended Function Set
DL: 4/8-bit interface control bit
When DL = "1", 8-bit MPU interface.
When DL = "0", 4-bit MPU interface.
RE: extended instruction set control bit
When RE = "1", extended instruction set
When RE = "0", basic instruction set
G: Graphic display control bit
When G = "1", Graphic Display ON
When G = "0", Graphic Display OFF
In same instruction cannot alter DL, RE and G at once. Make sure that change DL or G first and then RE.
l
Set Scroll Address
SR=1: AC5~AC0 is vertical scroll displacement address
l
Set Graphic RAM Address
Set GDRAM address into address counter (AC). This is a 2-byte instruction.
The first instruction sets the vertical address while the second one sets the horizontal address (write 2
consecutive bytes to complete the vertical and horizontal address setting).
Vertical address range is AC5...AC0
Horizontal address range is AC3
…AC0
The address counter (AC) of graphic RAM (GRAM) will be increased automatically after the vertical and
horizontal addresses are set. After horizontal address is increased upto 0FH, it will automatically return to 00H.
However, the vertical address will not increase as the result of the same action.
0
0
0
0
1
DL
X
RE
Code
RS
RW DB7 DB6 DB5 DB4
DB1
DB2
DB3
G
X
DB0
0
0
0
1
AC5 AC4 AC3 AC2
Code
RS
RW
DB7
DB6
DB5
DB4
DB1
DB2
DB3
AC1 AC0
DB0
0
0
1
0
0
0
AC3 AC2
Code
RS
RW
DB7
DB6
DB5
DB4
DB1
DB2
DB3
AC1 AC0
DB0
0
0
1
0
AC5 AC4 AC3 AC2
Code
RS
RW
DB7
DB6
DB5
DB4
DB1
DB2
DB3
AC1 AC0
DB0


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