Specifications:

• A single module can drive a 8x8 dot matrix common cathode
  
• Microcontroller 4 In One Display with 5P Line
• Operating Voltage: 5V
  
• Dimensions: 12.8X12.8X1.3cm
  
• Fixing screws with 64 holes with a diameter 3mm
  
• Module with input and output interfaces, support for cascading multiple modules
  
• The left side of the module to the input port, the right to an output port
  
• When the control of a single module, simply input port connected to CPU
  
• When a plurality of cascaded modules, input and output termination CPU, an input terminal of the second output end of the first module a module, the first two modules of the input terminal of the three termination modules, and so on...
  

Wiring:

• VCC 5V
  
• GND GND
  
• DIN P2.2
  
• CS P2.1
  
• CLK P2.0