C-51505NFJ-SLW-AC (AC) No. 2002-0177

OPTREX CORPORATION

Page 9/18

4.I/O Terminal

4.1.Pin Assignment

CN1

No.

Symbol

Function

1

LED (A)

LED Anode Terminal

2

LED (K)

LED Cathode Terminal

3

Power Supply (0V, GND)

4

Power Supply for Logic

5

Power Supply for LCD Drive

6

RS

Register Select Signal

7

R/W

Read/Write Select Signal H : Read L : Write

8

E

Enable Signal (No pull-up Resister)

9

DB0

Data Bus Line / Non-connection at 4-bit operation

10

DB1

Data Bus Line / Non-connection at 4-bit operation

11

DB2

Data Bus Line / Non-connection at 4-bit operation

12

DB3

Data Bus Line / Non-connection at 4-bit operation

13

DB4

Data Bus Line

14

DB5

Data Bus Line

15

DB6

Data Bus Line

16

DB7

Data Bus Line

CN2

No.

Symbol

Function

17

LED (A)

LED Anode Terminal

18

LED (K)

LED Cathode 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.

MODULE

VCC

VEE

VSS

VCC (+Voltage)

VR=10~20KΩ

VSS (0V)

VR