题目内容
AB=BA对吗
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AB=0,则A=0
A microcontroller is a single IC chip that contains the processor, memory, a clock and an I/O control unit.
MIcrocontroller has 8 ports, each one having 12 input/output lines providing a total of 32 I/O lines.
The CPU(Central Processing Unit) is the heart of the microcontrollers.
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