The 8×8 Dot Matrix Display Module has a MAX7219 driver IC and an 8×8 LED Matrix.
The MAX7219 IC is a compact and serial input/output common-cathode display driver. This IC is developed by Maxim Integrated, California. The presence of the MAX7219 IC on the 8×8 Display Module will give you a very easy interfacing experience with any development boards.
The 8×8 Led Matrix modules are available in different modules and each of the modules will have different pin configurations, but they have the same functioning pins.
The 8×8 Dot Matrix Display Module consists of 10 Pins. There are two pin series on both sides of the module. The pin series alongside the MAX7219 IC Consists of 3 driver pins (DIN, CS, CLK) to drive the display and two power pins (Vcc, GND) for powering the module.
The other one is just on the opposite side of the first one, covered by the LED matrix. Use these pins while connecting multiple 8×8 Dot Matrix Displays in Series with each other. These pins consist of almost the same pins as the first one; the only difference is the DOUT Pin which allows you to connect with the DIN pin of another Module.
The 8×8 Dot Matrix Display Modules can be used as the following:
