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ST7549T bảng dữ liệu(PDF) 9 Page - Sitronix Technology Co., Ltd.

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Giải thích chi tiết về linh kiện  68 x 102 Dot Matrix LCD Controller/Driver
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ST7549T
Ver 1.3
9/52
2005/12/06
Pin Name
I/O
Description
No. of Pins
/WR(R/W)
I
Read/Write execution control pin (PS[0:1]=[L:H])
PS2
MPU type
/WR(R/W)
Description
H
6800-series
R/W
Read/Write control input pin
R/W=" H “: read
R/W=" L”: write
L
8080-series
/WR
Write enable clock input pin
The data on D0 to D7 are latched
at the rising edge of the /WR
signal
When in the serial interface must fix to ” H”
1
/RD (E)
I
Read/Write execution control pin (PS[0:1]=[L:H])
PS2
MPU Type
/RD (E)
Description
H
6800-series
E
Read/Write control input pin
R/W=" H “: When E is " H ", D0 to D7
are in an output status.
R/W=" L “: The data on D0 to D7 are
latched at the falling edge of the E
signal.
L
8080-series
/RD
Read enable clock input pin
When /RD is " L ", D0 to D7 are in an
output status.
When in the serial interface must fix to ” H”
1
When using 8-bit parallel interface : 6800 . 8080
8-bit bi-directional data bus that is connected to the standard 8-bit
microprocessor data bus.
When chip select is not active, D0 to D7 is high impedance.
When using serial interface: 4-LINE
D0: serial input clock (SCLK)
D1,D2, D3 : serial input data (SDA), must be connected together
D4, D5, D6, D7 : must fix to ” H”
When chip select is not active, D0 to D7 is high impedance.
D7 to D4
D1 to D3 (SDA)
D0(SCLK)
I/O
When using serial interface: 3-LINE
D0 : serial input clock (SCLK)
D1 : serial input data (SDA_IN)
D2, D3 : serial data output for read ID function(SDA_OUT)
D4 : ID1 ,When connect to VSS, ID1=0;connect to VDD,ID1=1
D5 : ID2 ,When connect to VSS, ID2=0;connect to VDD,ID2=1
D6 : ID3 ,When connect to VSS, ID3=0;connect to VDD,ID3=1
D7 : ID4 ,When connect to VSS, ID4=0;connect to VDD,ID4=1
Suggest D1~D3 be connected together;
Suggest D4~D7(ID1~ID4) be connected to VDD if not used
When chip select is not active, D0 to D7 is high impedance.
8


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