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8×8 R Click is an add-on board in mikroBUS form factor. It’s a compact and easy solution for adding 8×8 RED LED display matrix to your design. It features MAX7219 8-digit LED display driver module as well as 64 RED LED diodes. 8×8 R Click communicates with target board microcontroller via four mikroBUS SPI lines (DIN, DOUT, CLK and CS). The board is designed to use 5V power supply only, but it can be used with 3.3V MCUs as well.
The MAX7219 is serial input/output common-cathode display driver with SPI interface. Analog and digital brightness control. On-chip BCD code-B decoder. Board is powered with 5V power supply only, but can be used with 3.3V MCUs as well.