Intelligent Character Display

AND481GST/GST-LED

Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085

7/20/07

Tel: 408.523.8200 • Fax: 408.733.1287 • sales@purdyelectronics.com • www.ANDdisplays.com

2

Power Supply

The LCD panel is driven by the voltage V

compensation.

Power Supply Block Diagram

Block Diagram

Dimensional Outline

Connector Pin Assignment

Pin

No.

Signal

Function

1

5V

2

0V

3

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

Temperature Variations

Temperature

0°C

5.00

+25°C

4.75

+50°C

4.50

E

R/W

RS

V

DD

V

O

DB7-DB0

LCD

CONTROLLER

LSI

HD4478OU

or

Equivalent

V

SS

CONTROL SIGNAL 4

SEG 40

COM 16

LCD PANEL

SEG 40

LCD SEGMENT DRIVER X 1