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MCQ

Q.

After reset, the stack pointer(SP) is initialized to the address of

A

internal ROM

B

internal RAM

C

external ROM

D

external RAM

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MCQ

1.

The flags IE0 and IE1, are automatically cleared after the control is transferred to respective vector if the interrupt is

A

level-sensitive

B

edge-sensitive

C

in serial port

D

in parallel port

Discussion

MCQ

2.

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

A

00FFH

B

FF00H

C

0FFFH

D

FFFFH

Discussion

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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

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4.

The number of bytes stored on the stack during one operation of PUSH or POP is

A

1

B

2

C

3

D

4

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5.

Which of the following is an external interrupt?

A

INT0(active low)

B

INT2(active low)

C

Timer0 interrupt

D

Timer1 interrupt

Discussion

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