首页/ 题库 / [单选题]8051单片机的Vss(20)引脚是( 的答案

8051单片机的Vss(20)引脚是(  )引脚。

单选题
2021-09-01 17:02
A、主电源+5V
B、接地
C、备用电源
D、访问片外存贮器
查看答案

正确答案
B

试题解析

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