74hc165多片级联，并通过MEGA8以IO口模拟SPI方式读取，发送至74HC164多片级联的LED灯显示 程序以驱动形式写出，只需修改端口即可，附有Proteus仿真模型-74hc165 multi-chip cascade through MEGA8 to simulate SPI mode IO port to read, send to 74HC164 cascaded multi-chip LED lights dis