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
Enable Signal
Data Bit 0
RS
R/W
E
+25°C
4.75
5
+50°C
4.50
6
Power Supply Block Diagram
7
DB0
DB1
DB2
DB3
DB4
DB5
DB6
DB7
8
Data Bit 1
9
Data Bit 2
10
11
12
13
14
Data Bit 3
Data Bit 4
Data Bit 5
Data Bit 6
Data Bit 7
Block Diagram
DB7-DB0
LCD
COM 16
LCD PANEL
CONTROLLER
LSI
HD4478OU
or
E
R/W
RS
SEG 40
VO
VDD
Equivalent
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 • sales@purdyelectronics.com • www.ANDdisplays.com
7/20/07
2
PURDY [ PURDY ELECTRONICS CORPORATION ]
