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Q.

If the external interrupts are programmed edge sensitive, then they should remain high for atleast

A

0 machine cycle

B

2 machine cycles

C

1 machine cycle

D

3 machine cycles

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MCQ

1.

The interrupts, INT0(active low) and INT1(active low) are processed internally by flags

A

IE0 and IE1

B

IE0 and IF1

C

IF0 and IE1

D

IF0 and IF1

Discussion

MCQ

2.

Among the five interrupts generated by 8051, the highest priority is given to the interrupt

A

IE0

B

TF1

C

TF0

D

IE1

Discussion

MCQ

3.

The atleast number of machine cycles for which the external interrupts that are programmed level-sensitive should remain high is

A

1

B

2

C

3

Discussion

MCQ

4.

If the external interrupt sources control the flags IE0 and IE1, then the interrupt programmed is

A

level-sensitive

B

edge-sensitive

C

in serial port

D

in parallel port

Discussion

MCQ

5.

The timer generates an interrupt, if the count value reaches to

A

00FFH

B

FF00H

C

0FFFH

D

FFFFH

Discussion

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