8/7/2019 new chapt 001
1/62
8/7/2019 new chapt 001
2/62
8/7/2019 new chapt 001
3/62
8/7/2019 new chapt 001
4/62
8/7/2019 new chapt 001
5/62
8/7/2019 new chapt 001
6/62
8/7/2019 new chapt 001
7/62
8/7/2019 new chapt 001
8/62
8/7/2019 new chapt 001
9/62
8/7/2019 new chapt 001
10/62
8/7/2019 new chapt 001
11/62
8/7/2019 new chapt 001
12/62
8/7/2019 new chapt 001
13/62
8/7/2019 new chapt 001
14/62
8/7/2019 new chapt 001
15/62
8/7/2019 new chapt 001
16/62
8/7/2019 new chapt 001
17/62
8/7/2019 new chapt 001
18/62
8/7/2019 new chapt 001
19/62
8/7/2019 new chapt 001
20/62
8/7/2019 new chapt 001
21/62
8/7/2019 new chapt 001
22/62
8/7/2019 new chapt 001
23/62
8/7/2019 new chapt 001
24/62
8/7/2019 new chapt 001
25/62
8/7/2019 new chapt 001
26/62
8/7/2019 new chapt 001
27/62
8/7/2019 new chapt 001
28/62
8/7/2019 new chapt 001
29/62
8/7/2019 new chapt 001
30/62
8/7/2019 new chapt 001
31/62
8/7/2019 new chapt 001
32/62
8/7/2019 new chapt 001
33/62
8/7/2019 new chapt 001
34/62
8/7/2019 new chapt 001
35/62
8/7/2019 new chapt 001
36/62
8/7/2019 new chapt 001
37/62
8/7/2019 new chapt 001
38/62
8/7/2019 new chapt 001
39/62
8/7/2019 new chapt 001
40/62
8/7/2019 new chapt 001
41/62
8/7/2019 new chapt 001
42/62
8/7/2019 new chapt 001
43/62
8/7/2019 new chapt 001
44/62
8/7/2019 new chapt 001
45/62
8/7/2019 new chapt 001
46/62
8/7/2019 new chapt 001
47/62
8/7/2019 new chapt 001
48/62
8/7/2019 new chapt 001
49/62
8/7/2019 new chapt 001
50/62
8/7/2019 new chapt 001
51/62
8/7/2019 new chapt 001
52/62
8/7/2019 new chapt 001
53/62
8/7/2019 new chapt 001
54/62
8/7/2019 new chapt 001
55/62
8/7/2019 new chapt 001
56/62
Dot Matrix Display IntroductionFeaturesHow to drive Dot Matrix Display
8/7/2019 new chapt 001
57/62
7
1
1
2
2
3
3
4
4
5
5
6
ro w
c o l u m n
p in
9
14
8
12
1
7
2
13 3 4 10 6
F i g u r e 1 0 . 2 3 . A n o d e r o w m a t ri x L E D s ( F a i rc h i ld G M A 8 X 7 5 C )
7
1
1
2
2
3
3
4
4
5
5
6
ro w
c o l u m n
p in
9
1 4
8
1 2
1
7
2
1 3 3 4 1 0 6
F i g u r e 1 0 .2 2 . C a t h o d e r o w m a t r i x L E D s ( F a i rc h i ld G M C 8 X 7 5 C )
Structure of Dot Matrix Display
8/7/2019 new chapt 001
58/62
y T wo parallel ports are needed to drive t h e matrix display .y One port drives t h e column w h ereas t h e ot h er port drives
th
e rows.
y One needs to scan t h e matrix LE D displays one row at atime, from top to bottom .
y For multiple matrix LE D displays in t h e application, time-multiplexing tec h nique needs to be used .
y D edicated driver c h ips suc h as MAX6952 (SPI interface)and MAX6953 (I2C interface) are available for cat h ode-rowmatrix LED displays to simplify t h e interfacing .
8/7/2019 new chapt 001
59/62
8/7/2019 new chapt 001
60/62
y Concept of Multiplexingy Types of multiplexed Display
y Character-Oriented Displaysy Pixel-Oriented Displays
8/7/2019 new chapt 001
61/62
8/7/2019 new chapt 001
62/62