AND481GST/GST-LED
Intelligent Character Display
Connector Pin Assignment
Power Supply
Pin
The LCD panel is driven by the voltage VDD–VO, so you need
an adjustable VO for contrast control and temperature
compensation.
Signal
No.
Function
VDD
VSS
VO
1
2
5V
0V
Temperature Variations
VDD–VO
5.00
Temperature
0°C
3
4
Contrast Adj.
Register Select
Read/Write
RS
R/W
E
+25°C
4.75
5
+50°C
4.50
6
Enable Signal
Data Bit 0
Power Supply Block Diagram
7
DB0
8
DB1Data
Bit
1
9
DB2
DB3
DB4
DB5
DB6
DB7
Data Bit 2
Data Bit 3
Data Bit 4
Data Bit 5
Data Bit 6
Data Bit 7
10
11
12
13
14
Block Diagram
DB7-DB0
LCD
CONTROLLER
LSI
COM 16
LCD PANEL
E
R/W
RS
VO
VDD
HD4478OU
or
Equivalent
SEG 40
VSS
SEG 40
LCD SEGMENT DRIVER X 1
CONTROL SIGNAL 4
Dimensional Outline
Purdy Electronics Corporation • 720 Palomar Avenue • Sunnyvale, CA 94085
Tel:408.523.8200 • Fax:408.733.1287 • email@ANDdisplays.com • www.ANDdisplays.com
12/20/01
2
PURDY [ PURDY ELECTRONICS CORPORATION ]
