MAX7219 CWG 8-Digit Digital Tube Display Control Module
Specification:
1. In program provides an example, you can access any IO ports, you can modify the port defined in the program.
2. VCC ? 5VGND ? GNDDIN ? P00CS ? P01CLK ? P02
Features:
1. VCC and GND Do not reversed,
2. it would burn chip2. 51 MCU P0 port need pull-up resistor.
3. If your device does not have pull-up resistor can be connected to other ports data lines.
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