User Manual

62
Pin definition:
Define the row and column numbering at first (only for the dot matrix whose model number
ends with BS)
Pin numbering corresponding to the above rows and columns:
COL
1
2
3
4
5
6
7
8
Pin No.
13
3
4
10
6
11
15
16
ROW
1
2
3
4
5
6
7
8
Pin No.
9
14
8
12
1
7
2
5
The 8*8 dot matrix is made up of sixty-four LEDs and each LED is placed at the cross point of
a row and a column. When the electrical level of a certain row is High and the electrical
level of a certain column is Low, the corresponding LED at their cross point will light up. For
example, to turn on the LED at the first dot, you should set ROW 1 to high level and COL 1 to
low, so the LED at the first dot brightens; to turn on all the LEDs on the first row, set ROW 1 to
high level and COL 1-8 to low, and then all the LEDs on the first row will light up; similarly, set
COL 1 to low level and ROW 1-8 to high level, and all the LEDs on the first column will light
up.
The principle of 74HC595 has been illustrated previously. One chip is used to control the
rows of the dot matrix while the other, the columns.