Description: - The output of the decoder is active low. So every time only a low level.- KEY1 and KEY2 key key and KEY3 key as A B C signal input. LED light output shows the default state of the state- the key is a high level - When the button is pressed, the corresponding I/O is low (0),- in order to get the value does not make sense, three keys are not when pressed, are 111. said 7 three buttons are pressed, are 000. 0
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decoder3_8.vhd
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