4.I/O Terminal
4.1.Pin Assignment
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
V
SS
V
DD
V
EE
RS
R/W
E
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
ANODE
CATHODE
Level
－
－
－
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
－
－
Power Supply (0V, GND)
Power Supply for Logic
Power Supply for LCD Drive
Register Select Signal
Read/Write Select Signal H : Read L : Write
Enable Signal (No pull-up Resister)
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line / Non-connection at 4-bit operation
Data Bus Line
Data Bus Line
Data Bus Line
Data Bus Line
LED Anode Terminal
LED Cathode Terminal
Function
4.2.Example of Power Supply
It is recommended to apply a potentiometer for the contrast adjust due to the tolerance
of the driving voltage and its temperature dependence.
VDD
VR
MODULE
VSS
VSS (0V)
VDD (+Voltage)
VEE
VR=10�½�20KΩ
DMC20261NY-LY-AXE (CC) No.99-0208
OPTREX
OPTREX CORPORATION
Page 8/16
OPTEK [ OPTEK TECHNOLOGIES ]
