题目内容
If LED digital tube adopts dynamic display mode, the following statement is wrong.
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The structure of the key switch is usually a mechanical elastic element. When the key is pressed and opened, the contact will be unstable at the moment of closing and opening. In order to eliminate the adverse consequences caused by jitter, the methods often used are () .
The segment code of the character "6" is () when the common anode LED digital tube is driven by inverter.
The seven segment Common cathode LED displays the character "H", and the segment code should be ()
When. P0 port is used as bus port, it is a bidirectional port.
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