AND501WGST Datasheet, PDF (2/2 Pages) Purdy Electronics Corporation – 20 Characters x 2 Lines Intelligent Alphanumeric Displays

Displays
Connector Pin Assignment (Continued)
Pin No.
4
5
6
Signal
RS
R/W
E
Function
“H” Data Input
“L” Command Input
Read/Write
Enable
7
DBO
8
DB1
9
DB2
10
DB3 ^{Data Bus}
DB0-DB7 are for 8-bit operation
11
DB4 _{DB4-DB7 are for 4-bit operation}
12
DB5
13
DB6
14
DB7
Block Diagram
E
R/W
RS
DB0-DB7 8
V_DD
V_O
GND
8
Controller/ ₁₆
Driver
20
AND501WGST/WGST-LED
Intelligent Alphanumeric Displays
Power Supply
The LCD panel is driven by the voltage V_DD–V_O, so adjustable
V_O is required for contrast control and temperature
compensation.
Temperature Variations
Temperature
-20°C
V_DD–V_EE
6.20
+25°C
5.60
+70°C
5.20
Power Supply Block Diagram
V_DD
(+5V)
V_DD – V_O
V_O
VR
V_DD
GND
V_DD – V_O = LCD Drive Voltage
VR10 to 20 kΩ
8
LCD
40
40
Dimensional Outline
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
7/20/07
Tel: [phone] • Fax: [phone] • [e-mail] • www.ANDdisplays.com
2