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Which of the following is also known as tri-state?(a) output port(b) input port(c) parallel port(d) output-input portThe question was asked by my college professor while I was bunking the class.Question is taken from Parallel Ports topic in section Basic Peripherals of Embedded Systems |
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Answer» CORRECT option is (a) output port The explanation: The progression in the parallel ports PROVIDES a third register or an individual CONTROL bit which can make the pin in a high impedance state. An output port which can do this is ALSO KNOWN as tri-state, that is, logic high, logic low and a high impedance state. |
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