The 8051 Microcontroller - General Questions (4)

Directions to Solve

The 8051 Microcontroller - General Questions

25.

Which of the following statements will add the accumulator and register 3?

A.	ADD @R3, @A
B.	ADD @A, R3
C.	ADD R3, A
D.	ADD A, R3

Answer: Option D

Explanation:

No answer description available for this question.

26.

Which of the following instructions will move the contents of register 3 to the accumulator?

A.	MOV 3R, A
B.	MOV R3, A
C.	MOV A, R3
D.	MOV A, 3R

Answer: Option D

Explanation:

No answer description available for this question

27.

This program code will be executed once:

STAT:	MOV A, #01H
	JNZ STAT

A.	True
B.	False

Answer: Option B

Explanation:

No answer description available for this question.

28.

The start-conversion on the ADC0804 is done by using the:

A.
B.	CS line
C.	INTR line
D.	V ref/2 line

Answer: Option A

Explanation:

No answer description available for this question.

29.

The contents of the accumulator after this operation
MOV A,#0BH
ANL A,#2CH
will be

A.	11010111
B.	11011010
C.	00001000
D.	00101000

Answer: Option C

Explanation:

No answer description available for this question.

30.

The 8-bit address bus allows access to an address range of:

A.	0000 to FFFFH
B.	000 to FFFH
C.	00 to FFH
D.	0 to FH

Answer: Option C

Explanation:

No answer description available for this question

31.

Bit-addressable memory locations are:

A.	10H through 1FH
B.	20H through 2FH
C.	30H through 3FH
D.	40H through 4FH

Answer: Option B

Explanation:

No answer description available for this question

32.

Which of the following instructions will load the value 35H into the high byte of timer 0?

A.	MOV TH0, #35H
B.	MOV TH0, 35H
C.	MOV T0, #35H
D.	MOV T0, 35H

Answer: Option A

Explanation:

No answer description available for this question.

The 8051 Microcontroller - General Questions (4)

The 8051 Microcontroller - General Questions

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