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The priority level of an interrupt of 8051 for which SI(serial interrupt) interrupt is programmed is

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The priority level of an interrupt of 8051 for which SI(serial interrupt) interrupt is programmed is

(a) level 0

(b) level 1

(c) level 0 or level 1

(d) none

I had been asked this question in final exam.

My question is based upon Interrupt Structure of 8051 topic in section Microcontroller 8051 of Microprocessor

1 Answer

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by (49.2k points)
The correct choice is (b) level 1

The explanation: SI interrupt is programmed for level 1 priority.

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