Displays
Connector Pin Assignment (Continued)
Pin No.
4
5
6
7
8
9
10
11
12
13
14
Signal
RS
R/W
E
DBO
DB1
DB2
DB3
DB4
DB5
DB6
DB7
Data Bus
DB0-DB7 are for 8-bit operation
DB4-DB7 are for 4-bit operation
“H” Data Input
“L” Command Input
Read/Write
Enable
Function
AND501WGST/WGST-LED
Intelligent Alphanumeric Displays
Power Supply
The LCD panel is driven by the voltage V
DD
–V
O
, so adjustable
V
O
is required for contrast control and temperature
compensation.
Temperature Variations
Temperature
-20°C
+25°C
+70°C
Power Supply Block Diagram
V
DD
V
DD
– V
O
V
O
VR
V
DD
(+5V)
V
DD
–V
EE
6.20
5.60
5.20
GND
V
DD
– V
O
= LCD Drive Voltage
VR10 to 20 kΩ
Block Diagram
E
R/W
RS
DB0-DB7
V
DD
V
O
GND
40
20
40
8
Controller/
Driver
16
LCD
8
8
Dimensional Outline
7/20/07
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
Tel: 408.523.8200 • Fax: 408.733.1287 •
sales@purdyelectronics.com
• www.ANDdisplays.com
2
PURDY [ PURDY ELECTRONICS CORPORATION ]
