Purdy AND501GST/GST-LED - Manual (Page 2)

Intelligent Character Display
AND501GST/GST-LED
Displays
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
T l 408 23 8200 F 408 33 128 l @ d l t i ANDdi l 2
Power Supply
LCD panel is driven by the voltage V
DD
–V
O
, so an adjustable
V
O
is required for contrast control and temperature
compensation.
Power Supply Block Diagram
Block Diagram
Dimensional Outline
Connector Pin Assignment
Pin
No.
Signal Function
1 GND Ground
2 V
DD
+5 Power Supply
3 V
D
LCD Drive Voltage
4 RS
“H” Data Input
“L” Command Input
5 R/W Read/Write
6 E Enable Signal
7 DB0
Data Bus
DB0-DB7 are for 8-bit operation
DB4-DB8 are for 4-bit operation
8 DB1
9 DB2
10 DB3
11 DB4
12 DB5
13 DB6
14 DB7
15 LED LED Anode
16 LED LED Cathode
Temperature Variations
Temperature V
DD
–V
O
0°C 4.80
+25°C 4.65
+50°C 4.35