4.I/O Terminal
4.1.Pin Assignment
CN1
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
Symbol
VDD
VSS
VLC
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
CS1
RST
R/W
D/I
E
F GND
NC
LED A
LED K
Level
―
―
―
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H/L
H,H→L
-
-
-
-
Function
Power Supply for Logic
Power Supply (0V, GND)
Power Supply for LCD Drive
Data Bus Line
Data Bus Line
Data Bus Line
Data Bus Line
Data Bus Line
Data Bus Line
Data Bus Line
Data Bus Line
Chip Select Signal
Reset Signal L : Reset
Write Signal L : Active
Data/Instruction Signal
Enable Signal(No pull-up Resister)
Frame Ground
Non-connection
LED Anode Terminal
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.
VDD
VLC
MODULE
VDD (+Voltage)
Tr
R1
VR
R2
VLC (-Voltage)
VSS
R1+R2+VR=10~20KΩ
Tr=2SA1202 or equivalent
VSS (0V)
DMF-50426NYJ-SLY (AC) No.99-0013
OPTREX CORPORATION
OPTREX
Page 10/18