- MAX7219采用的是SPI接口，而非I2C接口
- Dout脚滞后Din脚16个CLK周期
4个MAX7219模块共256个LED，功率相对一般模块要大很多，建议使用L7805等电流稍大一点的电源模块。（AMS1117电流较小）
不需要添加第三方库。
| ATTINY85 | MAX7219 |
|---|---|
| PB0 | DIN |
| PB1 | CS |
| PB2 | CLK |
| GND | GND |
见max7219x4目录。
有问题请联系QQ597540267。
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