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Which instruction is used to check the status of a single bit?

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in Microcontroller by (14.6k points)
Which instruction is used to check the status of a single bit?

(a) MOV A,P0

(b) ADD A,#05H

(c) JNB PO.0, label

(d) CLR P0.05H

I had been asked this question in unit test.

This intriguing question comes from I/O Port Programming and Addressing Modes topic in section 8051 Microcontroller of Microcontroller

1 Answer

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by (24.2k points)
Correct answer is (c) JNB PO.0, label

Explanation: JNB which stands for Jump if no bit checks the status of the bit P0.0 and jumps if the bit is 0.

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