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The device that receives or transmits data upon the execution of input or output instructions by the microprocessor is

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in Microprocessor by (39.4k points)
The device that receives or transmits data upon the execution of input or output instructions by the microprocessor is

(a) control word register

(b) read/write control logic

(c) 3-state bidirectional buffer

(d) none of the mentioned

I had been asked this question at a job interview.

This intriguing question comes from PIO 8255 (Programmable Input topic in chapter Basic Peripherals and their Interfacing with 8086/88 of Microprocessor

1 Answer

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by (49.2k points)
Correct answer is (c) 3-state bidirectional buffer

To explain: 3-state bidirectional buffer is used to receives or transmits data upon the execution of input or output instructions by the microprocessor.

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