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同步置零和异步置零有何区别

更新时间: 2020-09-23 00:00:00     

区别:

同步置零的输入信号和时钟信号有关,实际上输入信号和时钟信号进行与运算或者与非运算,输入信号和时钟信号的运算结果是有效的器件的状态才会改变。而异步置零的输入信号指和时钟信号无关,是指输入信号变为有效状态就器件的状态就改变。同步置零的信号可以过滤掉不正确状态跳变对逻辑的影响,但是需要保证有效输入信号在时钟信号跳变钱完成跳变,否则输入信号就是无效的。而异步置零的信号则和同步信号的效果正好相反。

关键词: 同步 异步 区别

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