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74HC32是四路2输入或门,74HC10是三路3输入与非门。 ROM部分 ROM部分,由1片74HC540、1片74HC154、16个8位拨码开关、16*8=128个二极管、以及上拉电阻组成。 其中由74HC154作为地址译码器,选择对应的拨码开关+二极管组合,即选择了对应的数据。 74HC154是一个4-16线译码器 ...
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今日热点
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Copyright infringement suit
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