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ST7920 参数 Datasheet PDF下载

ST7920图片预览
型号: ST7920
PDF下载: 下载PDF文件 查看货源
内容描述: 中国字体内置LCD控制器/驱动器 [Chinese Fonts built in LCD controller/driver]
分类和应用: 驱动器控制器
文件页数/大小: 49 页 / 694 K
品牌: SITRONIX [ SITRONIX TECHNOLOGY CO., LTD. ]
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ST7920  
Pin Description  
Name  
XRESET  
No.  
11  
I/O  
I
Connects to  
Function  
System reset input (low active).  
Interface selection:  
PSB  
23  
I
0: serial mode;  
1: 8/4-bit parallel bus mode.  
Parallel Mode: Register select.  
0: Select instruction register (write)  
or busy flag, address counter (read);  
1: Select data register (write/read).  
Serial mode: Chip select.  
1: chip enabled;  
RS(CS*)  
17  
I
MPU  
0: chip disabled.  
When chip is disabled, SID and SCLK  
should be set as Hor L. Transcient  
of SID and SCLK is not allowed.  
Parallel Mode: Read/Write control.  
0: Write;  
RW(SID*)  
E(SCLK*)  
18  
19  
I
I
MPU  
MPU  
1: Read.  
Serial Mode: Sserial data input.  
Parallel Mode: 1: Enable trigger.  
Serial Mode: Serial clock.  
Higher nibble data bus of 8-bit interface  
and data bus for 4-bit interface  
Lower nibble data bus of 8-bit interface.  
Latch signal for extension segment  
drivers.  
D4 to D7  
D0 to D3  
CL1  
28~31  
24~27  
12  
I/O  
I/O  
O
MPU  
MPU  
Extension segment drv.  
Shift clock for extension segment  
drivers.  
CL2  
M
13  
15  
O
O
O
O
O
Extension segment drv.  
AC signal for extension segment drivers  
voltage inversion.  
Extension segment drv.  
Data output for extension segment  
drivers.  
DOUT  
16  
Extension segment drv.  
COM1 to  
COM32  
SEG1 to  
SEG64  
40~71  
136~73  
1~3,7,8  
LCD  
LCD  
Common signals.  
Segment signals.  
LCD bias voltage.  
V0 to V4  
V0 ~ V4  
7V.  
VDD  
Vss  
10,14  
9,20  
I
I
Power  
Power  
VDD : 2.7V to 5.5V.  
VSS: 0V.  
Using internal oscillator:  
5.0V R=33K;  
2.7V R=18K.  
Using external clock:  
Use OSC1 as external clock input.  
LCD voltage doubler output.  
OSC1,  
OSC2  
21,22  
I, O  
Resistors  
VOUT  
33  
O
Resistors  
VOUT  
7V.  
*Note: The OSC pin must have the shortest wiring pattern of all other pins. To prevent noise from other  
signal lines, it should also be enclosed by the largest GND pattern. Poor anti-noise characteristics on the  
OSC line will result in malfunction, or adversely affect the clocks duty ratio.  
V4.0  
7/49  
2008/08/18