AND771GST Datasheet, PDF (3/3 Pages) Purdy Electronics Corporation – Intelligent Character Display

Connector Pin Assignment
Pin No. Signal
Function
1
GND 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
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
15
NC No Connection
16
NC No Connection
Block Diagram
E
R/W
RS
DB0-DB7 8
V_DD
V_O
GND
16
Controller/
Driver
40
2
Dimensional Outline
AND771GST/GST-LED
Intelligent Character Display
Power Supply
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
0°C
V_DD–V_O
5.00
+25°C
4.75
+50°C
4.50
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
LCD
40
Driver
40
Driver
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
3
Tel: [phone] • Fax: [phone] • [e-mail] • www.purdyelectronics.com
7/23/07