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The mnemonic used to perform a subtraction of source with an 8-bit data and jumps to specified relative address if subtraction is non-zero is

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The mnemonic used to perform a subtraction of source with an 8-bit data and jumps to specified relative address if subtraction is non-zero is

(a) DJNZ

(b) CJNE

(c) JZ

(d) JNC

This question was posed to me during an online exam.

My enquiry is from 8051 Instruction Set -2 topic in chapter Microcontroller 8051 of Microprocessor

1 Answer

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by (49.2k points)
The correct choice is (b) CJNE

For explanation I would say: The CJNE instruction perform a subtraction of source with an 8-bit data and jumps to specified relative address only if the result of the subtraction is non-zero, else continues to the next instruction.

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