Purdy AND731GST/GST-LED - Manual (Page 2)

Intelligent Character Display
AND731GST/GST-LED
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
7/20/07 Tel: 408.523.8200 • Fax: 408.733.1287 • [email protected] • www.purdyelectronics.com 2
Power Supply
The LCD panel is driven by the voltage V
DD
–V
O
, so you need
an adjustable V
O
for contrast and temperature control.
Temperature Variations
Block Diagram
Dimensional Outline
Connector Pin Assignment
Pin No. Signal Function
1 V
SS
Ground
2 V
DD
+5 Power Supply
3 V
O
LCD Drive Voltage
4 RS
“H” Data Input
“L” Command Input
5 R/W Read/Write
6 E Enable
7 DBO Data Bit 0
8 DB1 Data Bit 1
9 DB2 Data Bit 2
10 DB3 Data Bit 3
11 DB4 Data Bit 4
12 DB5 Data Bit 5
13 DB6 Data Bit 6
14 DB7 Data Bit 7
15 A LED Power
16 K LED Power
Temperature V
DD
–V
O
0°C 5.00
+25°C 4.75
+50°C 4.50
Connector Pin Assignment (Continued)
Pin No. Signal Function