ST7565 データシートの表示（PDF） - Unspecified
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ST7565 Datasheet PDF : 56 Pages
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ST7565
System Bus Connection Pins
Pin Name I/O
Function
No. of Pins
This is an 8-bit bi-directional data bus that connects to an 8-bit or 16-bit
D5 to D0
standard MPU data bus.
D6 (SCL)
D7 (SI)
I/O
When the serial interface is selected (P/S = “L”) :
D7 : serial data input (SI) ; D6 : the serial clock input (SCL).
D0 to D5 are set to high impedance.
8
When the chip select is not active, D0 to D7 are set to high impedance.
This is connect to the least significant bit of the normal MPU address bus,
A0
I
and it determines whether the data bits are data or a command.
A0 = “H”: Indicates that D0 to D7 are display data.
1
A0 = “L”: Indicates that D0 to D7 are control data.
RES
I
When /RES is set to “L,” the settings are initialized.
1
The reset operation is performed by the /RES signal level.
CS1
CS2
I
This is the chip select signal. When /CS1 = “L” and CS2 = “H,” then the
chip select becomes active, and data/command I/O is enabled.
2
• When connected to an 8080 MPU, this is active LOW.
(E) This pin is connected to the /RD signal of the 8080 MPU, and the
/RD
(E)
I
ST7565 series data bus is in an output status when this signal is “L”.
• When connected to a 6800 Series MPU, this is active HIGH.
1
This is the 6800 Series MPU enable clock input terminal.
• When connected to an 8080 MPU, this is active LOW.
(R/W) This terminal connects to the 8080 MPU /WR signal. The signals on
the data bus are latched at the rising edge of the /WR signal.
/WR
(R/W)
I
• When connected to a 6800 Series MPU:
This is the read/write control signal input terminal.
1
When R/W = “H”: Read.
When R/W = “L”: Write.
This is the MPU interface switch terminal.
C86
I
C86 = “H”: 6800 Series MPU interface.
C86 = “L”: 8080 MPU interface.
1
This is the parallel data input/serial data input switch terminal.
P/S = “H”: Parallel data input.
P/S = “L”: Serial data input.
The following applies depending on the P/S status:
P/S Data/Command Data Read/Write Serial Clock
P/S
I
“H”
A0
D0 to D7 /RD,/ WR
X
1
“L”
A0
SI (D7) Write only SCL (D6)
When P/S = “L”, D0 to D5 may be “H”, “L” or Open.
/RD (E) and /WR (R/W) are fixed to either “H” or “L”.
With serial data input, It is impossible read data from RAM .
Ver 1.0a
9/56
2002/06/24
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