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MICROCONTROLLER- EC UDAIPUR - DEC BATCH-28TH JAN 2025

1 / 50

Microcontrollers often have:

2 / 50

An alternate function of port pin P3.0 (RXD) in the 8051 is:

3 / 50

The microcontroller is useful in systems that have no variable programs for dedicated applications.

4 / 50

Which one is the bit addressable register?

5 / 50

Data transfer from I/O to external data memory can only be done with the MOVX command.

6 / 50

The total external data memory that can be interfaced to the 8051 is:

7 / 50

Which of the following bits are used for setting the data frame size?

8 / 50

What is the standard form of USART?

9 / 50

The ARM processors are _______

10 / 50

What will happen in that condition, if an interrupt occurs while the microcontroller is serving any other interrupt?

11 / 50

The following program will receive data from port 1, determine whether bit 2 is high, and then send the number FFH to port 3:

READ: MOV A,P1
ANL A,#2H
CJNE A,#02H,READ
MOV P3,#FFH

 

12 / 50

How many transistors do very large-scale integration IC’s require?

13 / 50

The 8051 has ________ parallel I/O ports.

14 / 50

Which of the following commands will copy the contents of location 4H to the accumulator?

15 / 50

A label is used to name a single line of code.

16 / 50

Which register provides control and status information about counters is ________

17 / 50

The special function registers are maintained in the next 128 locations after the general-purpose data storage and stack.

18 / 50

The address space of the 8051 is divided into four distinct areas: internal data, external data, internal code, and external code.

19 / 50

Which register used as a scratchpad?

20 / 50

When the 8051 is reset and the EA line is LOW, the program counter points to the first program instruction in the:

21 / 50

The following command will rotate the 8 bits of the accumulator one position to the left: RL A

22 / 50

This statement will set the address of the bit to 1 (8051 Micro-controller) SETB 01H

23 / 50

Which of the following is an 8 bit register?

24 / 50

Which register is used for accessing the external data memory?

25 / 50

The 8051 can handle ________ interrupt sources.

26 / 50

What is the difference between the 8031 and the 8051?

27 / 50

Which of the following commands will move the value at port 3 to register 2?

28 / 50

The following program will cause the 8051 to be stuck in a loop:  LOOP: MOV A, #00H JNZ LOOP

29 / 50

The number of data registers is:

30 / 50

In reduced instruction set computer architecture the number of instructions involved is _______

31 / 50

The 8051 has ________ 16-bit counter/timers.

32 / 50

The designs of a centigrade thermometer and a PWM speed-control circuit can be implemented by the 8051.

33 / 50

Which register used as an operand register?

34 / 50

MOV A, @ R1 will:

35 / 50

The statement LCALL READ passes control to the line labelled READ.

36 / 50

Which of the following should a microcontroller at-least should consist of?

37 / 50

The receive buffer of the serial data buffer is a_______

38 / 50

Which register contains the status information?

39 / 50

The 8255 is a ______ chip.

40 / 50

Which register provides the status and control information about the serial port is _________

41 / 50

Which of the following file extension that is loaded in a microcontroller for executing any instruction?

42 / 50

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

43 / 50

Which of the following pins of a microcontroller are directly connected with 8255?

44 / 50

Which of the following commands will copy the contents of RAM whose address is in register 0 to port 1?

45 / 50

An alternate function of port pin P3.0 (RXD) in the 8051 is:

46 / 50

In which duplex the data is transmitted in both ways at the same time?

47 / 50

This program code will be executed continuously:
STAT: MOV A, #01H JNZ STAT

48 / 50

The last 96 locations in the internal data memory are reserved for general-purpose data storage and stack.

49 / 50

What is the internal Vref of an Atmega32 series?

50 / 50

The applications of ARM processor are ______