Pin no.
Symbol
Function
1
NC
No connection
2
V0
LCD driver supplies voltages. It is generated by internal DC/DC converter.
Connect a 0.1uF ~ 2.2uF capacitor between this pin and VSS
3
VSS
Power supply, 0V .
4
VDD
Power supply, +3.0V.
5
6
DB7
This is an 8-bit bi-directional data bus
7
DB6
8
DB5
9
DB4
10
DB3
11
DB2
12
DB1
13
DB0
14
RD
When connected to an 8080 MPU, it is active LOW. This pad is
connected to the /RD signal of the 8080MPU, and the IST3080
data bus is in an output status when this signal is “L”.
15
WR
When connected to an 8080 MPU, this is active LOW. 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.
16
A0
This is connected to the least significant bit of the normal MPU
address bus, and it determines whether the data bits are data
or a command.
A0 = “H”: Indicate that D0 to D7 are display data
A0 = “L”: Indicates that D0 to D7 are control data
17
/RES
Reset input pin When /RES is “L”, initialization is executed.
18
/CS1
Chip select input pins
Data / instruction I/O is enabled only when CS1B is “L” and CS2 is “H”. when chip
select is non-active, DB0 to DB7 may be high impedance.
19
A(LED+)
Anode of LED backlight (+3.0V±0.2V, LEDs in parallel connection)
20
K(LED-)
Cathode of LED backlight (0V)
