4.I/O Terminal
4.1.Pin Assignment
CN1
No.
Symbol
VSS
Level
-
Function
Power Supply (0V)
1
2
VCC
-
Power Supply for Logic
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
E
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
6
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
VLED
7
8
9
10
11
12
13
14
15
Data Bus Line
Data Bus Line
Data Bus Line
Power Supply for LED
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.
VCC
VEE
VSS
VCC (+Voltage)
VEE (-Voltage)
VSS (0V)
VR
MODULE
~
VR=10 20K
Ω
DMC-50149NYU-LY-B (AB) No.98-0118
OPTREX CORPORATION
Page 9/16
OPTREX