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Microcontrollers Questions Set 25:

Quiz Mode

The size of each page in 8051 program memory is ___________KB.

Solution:

Which of the following MOV instructions is invalid?

MOV @R0,A

MOV @R1,#12

MOV A,@R0

MOV @R3,A

Solution:

Which bit in the SCON register is called the multiprocessor communication bit ?

SM1

SM2

SM0

TB8

Solution:

Which of the following modes are not used in the serial communication in 8051 microcontroller ?

PCON

TCON

SBUF

SCON

Solution:

TMOD register has the input data as 0011 0011, which of the timers is working in the 8051 microcontroller ?

timer 0

timer 1

both

none

Solution:

It is required to save the status of port P0.3 in RAM bit location 44.

MOV A, 84H MOV 44, A

MOV C, 84H MOV 44, C

MOV C, 83H MOV 44, C

MOV A, 80H MOV 44, A

Solution:

What does the 'PUSH 6' instruction do?

Pushes the content at memory location 6H onto the stack

Pushes the value 6 onto the stack

Pushes the content of register R6 onto the stack

The code is erroneous

Solution:

Which one of the following is a peripheral control register ?

TCON

SBUF

TH0

TL1

Solution:

Which of the following type of microcontroller reduces the number of machine cycles ?

RISC

CISC

Embedded microcontroller

none of the above

Solution:

Which of the following statements is true about special function registers (SFRs) of the 8051 microcontroller?

The SFRs can be accessed by their addresses only

The SFRs have addresses between 80H and FFH

All the locations from 80H to FFH are used by SFRs

Users/programmers can use the 80H to FFH locations if they need more RAM

Microcontrollers Questions Set 25:

The size of each page in 8051 program memory is ___________KB.

Solution:

Which of the following MOV instructions is invalid?

Solution:

Which bit in the SCON register is called the multiprocessor communication bit ?

Solution:

Which of the following modes are not used in the serial communication in 8051 microcontroller ?

Solution:

TMOD register has the input data as 0011 0011, which of the timers is working in the 8051 microcontroller ?

Solution:

It is required to save the status of port P0.3 in RAM bit location 44.

Solution:

What does the 'PUSH 6' instruction do?

Solution:

Which one of the following is a peripheral control register ?

Solution:

Which of the following type of microcontroller reduces the number of machine cycles ?

Solution:

Which of the following statements is true about special function registers (SFRs) of the 8051 microcontroller?

Solution:

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