Purdy AND491GST-LED Manual do Utilizador descarregar pdf (Página 2)

Intelligent Character Display

AND491GST-LED

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

3/3/08

Tel: 408.523.8200 • Fax: 408.733.1287 • email@purdyelectronics.com • www.purdyelectronics.com

Power Supply

The LCD panel is driven by the voltage V

–V

, so you need

an adjustable V

for contrast control and temperature

compensation.

Power Supply Block Diagram

Block Diagram

Dimensional Outline

Connector Pin Assignment

Pin No.

Signal Function

Contrast Adj.

4 RS Register Select

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 Variations

Temperature

–V

0°C 4.80

+25°C 4.50

+50°C 4.20

GND

– V

= LCD Drive Voltage

VR10 to 20 kΩ

(+5V)

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AND491GST-LED 1
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