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设MCS-51单片机晶振频率为12MHz,定时器作计数器使用时,其最高的输入计数频率应为( )

A、2MHz

B、1MHz

C、500KHz

D、250KHz

时间：2022-04-02 17:31 关键词：佳木斯职业学院继续教育学院物联网应用技术高起专单片机原理及应用（面授）平时作业1

答案解析

C

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