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How many cycles are used by MSP430, when reti instruction is executed?

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in Microcontroller by (14.6k points)
How many cycles are used by MSP430, when reti instruction is executed?

(a) 3

(b) 4

(c) 5

(d) depends on the conditions

This question was addressed to me in an interview for job.

My query is from Interrupts topic in chapter MSP430 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Correct option is (c) 5

The explanation: When reti instruction is executed, five cycles are used because it firstly pops the stack register completely and then takes the top of the stack into the PC to return to the next address of the main program.

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