题目内容：
80C51单片机的( )口的引脚，还具有外中断、串行通信等第二功能。A、P0
B、P1
C、P2
D、P3
参考答案：
选择题：80C51单片机的( )口的引脚，还具有外中断、串行通信等第二功能。A、P0B、P1C、P2D、P3
- 题目分类：安徽广播电视大学-机电一体化技术
- 题目类型：选择题
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A、P0
B、P1
C、P2
D、P3
A、P0
B、P1
C、P2
D、P3
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