MAX7219 is a 4-in-1 display that may be used in a variety of ways.
The MAX7219 Dot LED Matrix Module features 8×8 LED’s, each controlled very precisely by the MAX7219 driver to generate the color pattern you wish.
it connects the microprocessor 7-segment digital LED display with 8 digits, you can also connect a bar graph display or 64 independent LED. Thereon including a B-type BCD encoder chip, multi-channel scanning loop segment word driver, but also a static RAM 8 x 8 for storing each data. Only one external register is used to set the segment current of each LED.
1.The left side of the module is the input port, and the right side is the output port.
2.When controlling a single module, only need to connect the input port to the CPU.
3.When multiple modules are cascaded, the input of the first module is connected to the CPU, the output is connected to the input of the second module, the output of the second module is connected to the input of the third module, and so on…
Take 51 microcontroller as an example:
VCC → 5V
GND → GND
DIN → P2.2
CS → P2.1
CLK → P2.0
Operating Voltage : 3.7 V to5V
Input Current : 320 mA
PCB Dimensions : 128×32 (LxW) mm
Display Dimensions : 32x32x6 (LxWxH) mm
Package Include :
1x MAX7219 4 IN 1 8X8 LED DOT MATRIX DISPLAY MODULE FOR ARDUINO ARM RASPBERRY PI