4.I/O Terminal
4.1.Pin Assignment
No.
1
Symbol
Level
－
Function
VSS
Power Supply (0V, GND)
Power Supply for Logic
VDD
－
2
VEE
－
Power Supply for LCD Drive
Register Select Signal
3
RS
H / L
H / L
H / L
H / L
H / L
H / L
H / L
H / L
H / L
H / L
H / L
－
4
R/W
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
5
E
DB0
6
7
DB1
8
DB2
9
DB3
10
11
12
13
14
15
16
DB4
DB5
Data Bus Line
DB6
Data Bus Line
DB7
Data Bus Line
LED CATHODE
LED ANODE
LED Cathode Terminal
－
LED Anode Terminal
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
VSS
VEE
VDD(+Voltage)
VR
MODULE
VSS (0V)
VR=10～20KΩ
DMC40202NY-LY-AFE (AR) No.99-0205
OPTREX CORPORATION
Page 8/16
OPTREX
OPTREX [ OPTREX CORPORATION ]
