2.2
Interface Pin Description
Symbol
A0
Function
Register select input pin
−
A0 = "H": DB0 to DB8 or SI are display data
−
A0 = "L": DB0 to DB8 or SI are control data
Read / Write execution control pin
MPU Type
6800
RW_WR
RW
Description
Read / Write control input pin
RW = “H” : read
RW = “L” : write
Write enable clock input pin
The data on DB0 to DB8 are latched at the
rising edge of the /WR signal.
Pin No.
1
2
RW_WR
8080
/WR
3
4
5
6
7
8
9
10
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
They connect to the standard 8-bit MPU bus via the 8 bit bi-directional bus.When
the following interface is selected and the XCS pin is high, the following pins
become highimpedance, which should be fixed to VDD or VSS.
In IIC Interface
D7: SCL; D6: SI ; D0, D1: SA1, SA0
D3, D2: Acknowledgement
D4, D5, D8 should be fixed to VDD or VSS.
Read / Write execution control pin
MPU Type
6800
RW_WR
E
Description
Read / Write control input pin
-RW = “H”: When E is “H”, DB0 to DB8 are
in an output status.
-RW = “L”: The data on DB0 to DB8 are
latched at the falling edge of the E signal.
8080
/RD
Read enable clock input pin
When /RD is “L”, DB0 to DB8 are in an
output status.
11
E_RD
12
RST
Reset input pin. When RST is “L”, initialization is executed.
PE240128WRF-001-HQ
VER.0
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