描述
常所说的单片机侧重于控制,不支持信号处理,属于低端嵌入式处理器,arm可以看做是低端单片机升级版,支持操作系统管理,更多接口如网卡,处理能力更强;fpga是可编程逻辑器件,侧重时序,可构建从小型到大型的几乎所有数字电路系统,DSP主要完成复杂的数字信号处理,如fft,通常一个复杂系统可以由单片机、arm、FPGA、dsp中的一种或几种构成
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