Industrial Electronic Engineers, Inc.
SIZE
A
CODE IDENT
NO.
05464
S03858–06–0105
Van Nuys, California
Scale: NONE
Rev C
Sheet 6
2.0
LOGICAL STRUCTURE AND FUNCTION
2.1
LCD Module
Figure 1 illustrates the major components of the Daystar Nova module. The microprocessor controls all
multiplexing and character decoding. The temperature compensation network optimizes both viewing and
contrast ratio for the display over all operating temperatures.
E
RS R/W
DB
7
DB
4
DB
DB
3
0
LCD Controller
LCD Row Drivers and
Shift Registers
LCD Column Drivers
and Shift Registers
LCD Display
Temperature Compensation
V
CC
(+5V)
Gnd
EL Backlight
6" Flying Leads
Figure 1
LCD Module Block Diagram
2.1.1
Signal Description
Signal Name
Number Of Lines
Input/Output
Connected
RS
1
I
LCD Controller
R/W
1
I
LCD Controller
E
1
I
LCD Controller
DB
4
–DB
7
4
I/O
LCD Controller
DB
0
–DB
3
4
I/O
LCD Controller
V
CC
2
–
Power
GND
7
–
–
