ALL THE BEST!!!
MICROCONTROLLER-EFC-CHENNAI-DATED-06THAUGUST2024
1 / 50
In reduced instruction set computer architecture the number of instructions involved is _______
2 / 50
Which of the following is the basic functions of a timer?
3 / 50
The total amount of external code memory that can be interfaced to the 8051 is:
4 / 50
Which of the following commands will move the value at port 3 to register 2?
5 / 50
What will happen in that condition, if an interrupt occurs while the microcontroller is serving any other interrupt?
6 / 50
The designs of a centigrade thermometer and a PWM speed-control circuit can be implemented by the 8051.
7 / 50
Which of the following instructions will move the contents of the accumulator to register 6?
8 / 50
When the microcontroller executes some arithmetic operations, then the flag bits of which of the following register are affected?
9 / 50
Which of the following microcontroller doesn’t match with its architecture below?
10 / 50
Which register provides the status and control information about the serial port is _________
11 / 50
Which of the following should a microcontroller at-least should consist of?
12 / 50
Which of the following steps have to be followed for interfacing a sensor to a microcontroller 8051?
13 / 50
How many transistors do very large-scale integration IC’s require?
14 / 50
Which register provides control and status information about counters is ________
15 / 50
The following command will copy the accumulator to the location whose address is 23H: MOV 23H, A
16 / 50
In which duplex the data is transmitted in both ways at the same time?
17 / 50
The vector address of the external interrupt 1 is ________
18 / 50
The ARM processors are _______
19 / 50
The I/O port that does not have a dual-purpose role is:
20 / 50
The special function registers can be referred to by their hex addresses or by their register names.
21 / 50
The 8255 is a ______ chip.
22 / 50
To improve the efficiency of an MSP430 based microcontroller, for one register
23 / 50
What is the internal Vref of an Atmega32 series?
24 / 50
Which of the following bits are used for setting the data frame size?
25 / 50
Which one is the bit addressable register?
26 / 50
Does 8255 have handshaking capability?
27 / 50
What is the function of this instruction “WDTCTL = WDTPW | WDTCONFIG”, where **#define WDTCONFIG (WDTCNTCL|WDTSSEL)**
28 / 50
Why are opt isolators normally used between the microcontrollers and the ULN2803?
29 / 50
What is the difference between the 8031 and the 8051?
30 / 50
An alternate function of port pin P3.0 (RXD) in the 8051 is:
31 / 50
When the 8051 is reset and the EA line is LOW, the program counter points to the first program instruction in the:
32 / 50
Which of the following is an 8 bit register?
33 / 50
The contents of the accumulator after this operation MOV A, #2BH ORL A, 00H will be:
34 / 50
The following command will rotate the 8 bits of the accumulator one position to the left: RL A
35 / 50
Which of the following devices are specifically being used for converting serial to parallel and from parallel to serial respectively?
36 / 50
Which of the following bit/s of the status register that allows the microcontroller to operate in its low power mode?
37 / 50
The vector address of the external interrupt 0 is ________
38 / 50
The applications of ARM processor are ______
39 / 50
The ADC0804 has ________ resolution.
40 / 50
41 / 50
Which of the following pins of a microcontroller are directly connected with 8255?
42 / 50
Which of the following file extension that is loaded in a microcontroller for executing any instruction?
43 / 50
An alternate function of port pin P3.1 in the 8051 is:
44 / 50
The number of data registers is:
45 / 50
Which of the following is correct about WDTCTL?
46 / 50
Why are ULN2803 normally used between the microcontrollers and the relays?
47 / 50
A HIGH on which pin resets the 8051 microcontroller?
48 / 50
What is the standard form of USART?
49 / 50
To interface external EPROM memory for applications, it is necessary to DE multiplex the address/data lines of the 8051.
50 / 50
Which of the following architecture is followed by general-purpose microprocessors?
