tri state

(hardware)A feature of some digital electronic deviceswhich allows a connector (pin) to either act as a normaloutput, driving a signal onto a line, or to be "tri stated" -set to a high-impedance ("high Z") condition. This allowsother outputs to drive signals onto the line. Often the sameconnector also functions as an input when its output circuitryis tri stated.

Tri-state outputs are typically used for the connection ofseveral digital circuits to a shared bus onto which any oneof them may output data for the others to input.

单词	tri state
释义	tri state tri state (hardware)A feature of some digital electronic deviceswhich allows a connector (pin) to either act as a normaloutput, driving a signal onto a line, or to be "tri stated" -set to a high-impedance ("high Z") condition. This allowsother outputs to drive signals onto the line. Often the sameconnector also functions as an input when its output circuitryis tri stated. Tri-state outputs are typically used for the connection ofseveral digital circuits to a shared bus onto which any oneof them may output data for the others to input.
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