Specification:
Material: PCB + Electronic Components.
Wiring instructions (a program, for example, you can pick any IO port definition can be modified in the program):
VCC→5V
GND→GND
DIN →P00
CS →P01
CLK→P02

Package List:
1*MAX7219 Display Control Module

• MAX7219 is an integrated serial input / output common-cathode display drivers, which connects the microprocessor and 8 digit 7-segment digital LED display, you can also connect a bar graph display or 64 separate LED.
• The entire device includes a 150μA low-power shutdown mode, analog and digital brightness control, a scan-limit register allows the user to display 1-8 bit data, there is an all LED light detection mode.
• Only need three IO ports can drive eight digital tube,the module compatible of 5v/3.3v microcontroller.
• A convenient four-wire serial interface can connect all common microprocessor. Each data can be addressed in the update without rewriting all displays.
• PCV board four corners of the fixed copper stud, which can effectively precent short circuit accidents happen.

MAX7219 is an integrated serial input / output common-cathode display drivers, which connects the microprocessor and 8 digit 7-segment digital LED display, you can also connect a bar graph display or 64 separate LED.Yangfan