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If the pins of the keyboard are used as an interrupt, then these pins will cause an interrupt of what type?

(a) External hardware interrupt

(b) Timer interrupt

(c) TI/RI interrupt

(d) None of the mentioned

I have been asked this question during an internship interview.

Question is from Keyboard Interfacing topic in section AVR Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Correct option is (a) External hardware interrupt

To explain: The pins of the keyboard act as an external hardware interrupt as some external pulse is helping in generating this interrupt.

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