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mux2to1
- --按下学习板的KEY1键和KEY2键,LED灯会显示状态 --KEY3作为选择器的开关; --1高电平选通a路信号也就是key1,;0低电平选通b路信号也就是key2-- Press the learning board KEY1 key and the KEY2 key, LED lantern display the state- KEY3 as selector switch - 1 high level gating a channel signal is key1 0 lo