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Microcontrollers Questions Set 20:

Quiz Mode

How many external interrupts ae there in 8051 microcontroller ?

Solution:

Calculate the checksum byte for the values 11H, 22H, and AAH.

61H

44H

23H

56H

Solution:

Which of the following instructions is not a 2-byte instruction?

JNC

DJNZ

LJMP

Solution:

What will be the final value in the accumulator ? MOV A, #59H SWAP A INC A

59H

95H

60H

96H

Solution:

What will be the final value in the accumulator ? MOV A, #55H MOV R0, #04H ANL A, R0

04H

56H

62H

55H

Solution:

For how many machine cycles the RST pin should be kept high so that the 8051 microcontroller acknowledges it?

Solution:

MOVDPTR, #FE00H;
Which addressing mode is shown in the above code?

direct addressing

indirect addressing

absolute addressing

immediate addressing

Solution:

Power saving modes IDLE and POWER DOWN are activated in 8051 by setting which bits respectively of the power control register (PCON)?

PCON.1, PCON.0

PCON.0, PCON.1

PCON.2, PCON.1

PCON.1, PCON.2

Solution:

How much Data Memory is present in 8051 microcontroller?

64 kB

128 bytes

128 bits

8 bits

Solution:

Which of the following mode in 8051 timers, uses a variable baud rate ?

mode 2

mode 1

mode 3

all the above

Microcontrollers Questions Set 20:

How many external interrupts ae there in 8051 microcontroller ?

Solution:

Calculate the checksum byte for the values 11H, 22H, and AAH.

Solution:

Which of the following instructions is not a 2-byte instruction?

Solution:

What will be the final value in the accumulator ? MOV A, #59H SWAP A INC A

Solution:

What will be the final value in the accumulator ? MOV A, #55H MOV R0, #04H ANL A, R0

Solution:

For how many machine cycles the RST pin should be kept high so that the 8051 microcontroller acknowledges it?

Solution:

MOVDPTR, #FE00H;
Which addressing mode is shown in the above code?

Solution:

Power saving modes IDLE and POWER DOWN are activated in 8051 by setting which bits respectively of the power control register (PCON)?

Solution:

How much Data Memory is present in 8051 microcontroller?

Solution:

Which of the following mode in 8051 timers, uses a variable baud rate ?

Solution:

Related Question Sets:

Related Topics:

Microcontrollers Questions Set 20:

How many external interrupts ae there in 8051 microcontroller ?

Solution:

Calculate the checksum byte for the values 11H, 22H, and AAH.

Solution:

Which of the following instructions is not a 2-byte instruction?

Solution:

What will be the final value in the accumulator ? MOV A, #59H SWAP A INC A

Solution:

What will be the final value in the accumulator ? MOV A, #55H MOV R0, #04H ANL A, R0

Solution:

For how many machine cycles the RST pin should be kept high so that the 8051 microcontroller acknowledges it?

Solution:

MOVDPTR, #FE00H; Which addressing mode is shown in the above code?

Solution:

Power saving modes IDLE and POWER DOWN are activated in 8051 by setting which bits respectively of the power control register (PCON)?

Solution:

How much Data Memory is present in 8051 microcontroller?

Solution:

Which of the following mode in 8051 timers, uses a variable baud rate ?

Solution:

Related Question Sets:

Related Topics:

MOVDPTR, #FE00H;
Which addressing mode is shown in the above code?