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【单选题】
有一个按键,一端连接到单片机的P3.2外部中断0输入口,一端接地。如果想要在按键按下瞬间做某件事情,则需要如何配置EX0和IT0两个位?A.
EX0 = 0; IT0 = 0;
B.
EX0 = 1; IT0 = 0;
C.
EX0 = 0; IT0 = 1;
D.
EX0 = 1; IT0 = 1;
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