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What are the contents of the IE register, when the interrupt of the memory location 0x00 is caused?

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What are the contents of the IE register, when the interrupt of the memory location 0x00 is caused?

(a) 0xFFH

(b) 0x00H

(c) 0x10H

(d) 0xF0H

This question was addressed to me in final exam.

My enquiry is from Interrupt Programming topic in section 8051 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Correct choice is (b) 0x00H

For explanation: When interrupt of 0x00 is caused (the reset interrupt) then all the other interrupts will be disabled or the contents of the IE register becomes null.

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