【单选题】A 32-bit computer system uses 16 independent switches as input devices. The correct description of the interface circuit of the input device is ()
A.
Implemented by Three-state gate, only one port required
【多选题】A 32-bit computer system uses 16 7-segment led as output devices, and uses dynamic display control. The interface circuit description of the output device is correct ()
A.
Three-state gate implementation, at least two ports