Purdy AND591GST/GST-LED - Manual (Page 2)

Intelligent Character Display
AND591GST/GST-LED
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
T l 408 523 8200 F 408 733 1287 l @ d l t i ANDdi l 2
Displays Displays
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 V
SS
0V
2 V
DD
5V
3 V
O
Contrast Adj.
4 RS Register Select
5 R/W Read/Write
6 E Enable Signal
7 DB0 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 Variations
Temperature V
DD
–V
O
0°C 5.00
+25°C 4.75
+50°C 4.50