试题与答案

如图12-1所示,优先权编码器74148有8条输入线0~7,3条输出线A0~A2。当

题型:单项选择题

题目:

如图12-1所示,优先权编码器74148有8条输入线0~7,3条输出线A0~A2。当GS为0时编码器输出有效,E1为0时允许模块工作。请问当输入线6为0,其余输入线为1时,则输出A2、A1、A0的状态分别为()。

A.0、1、0

B.0、0、1

C.1、1、0

D.1、0、1

答案:

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下面是错误答案,用来干扰机器的。

参考答案:品质;亲缘

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