Ec 334 Microcontroller Lab: Sessional Evaluation S6ece2

23 Questions | By Jithinjoseph | Last updated: Mar 20, 2022 | Total Attempts: 155

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Ec 334 Microcontroller Lab: Sessional Evaluation S6ece2 - Quiz

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1.

The data bus width of 8051 is,
- A.
  
  16 bit
- B.
  
  8 bit
- C.
  
  32 bit
- D.
  
  64 bit
2.

No. of address lines in 8051 architecture is..
- A.
  
  8 bit
- B.
  
  16 bits
- C.
  
  24 bits
- D.
  
  3o bits
3.

Total no. of addressing modes supported by 8051 is
- A.
  
  4
- B.
  
  5
- C.
  
  6
- D.
  
  7
4.

MOV A,@R0 Identify the addressing mode
- A.
  
  Direct addressing mode
- B.
  
  Register indirect addressing mode
- C.
  
  Immediate addressing mode
- D.
  
  Indexed addressing mode
5.

In 8051 memmory organization, the bit addressable area is,
- A.
  
  00-15H
- B.
  
  00 - 1FH
- C.
  
  20 - 2FH
- D.
  
  30-7FH
6.

MOV DPTR,#4500H MOVX A,@DPTR INC DPH MOVX @DPTR,A What does the above program perform?
- A.
  
  Copies the content of memmory location 4500H to 4501H
- B.
  
  Copies the content of memmory location 4500H to 4600H
- C.
  
  Copies the content of memmory location 4501H to 4500H
- D.
  
  Copies the content of memmory location 4600H to 4500H
7.

2's complement of the number 10H
- A.
  
  20H
- B.
  
  EFH
- C.
  
  F0H
- D.
  
  E0H
8.

Maximum size of extrenal ROM that can be addressed by 8051
- A.
  
  16KB
- B.
  
  32KB
- C.
  
  64KB
- D.
  
  128KB
9.

8253 is
- A.
  
  Programmable timer
- B.
  
  USART
- C.
  
  Keyboard/display interface
- D.
  
  Programmable peripheral interface
10.

Total no. of timers in 8051
- A.
  
  1
- B.
  
  2
- C.
  
  3
- D.
  
  4
11.

SFR address range in 8051
- A.
  
  00 -7FH
- B.
  
  1F-7FH
- C.
  
  80 - FFH
- D.
  
  8F - FFH
12.

What does the following instruction perform? CPL A
- A.
  
  Compare the lower nibble of A with that of B
- B.
  
  Complement Accumulator
- C.
  
  Compare the lower nibble of A with upper nibble of A
- D.
  
  None of These
13.

After initialisation the value in Stack Pointer registre is
- A.
  
  06H
- B.
  
  08H
- C.
  
  07H
- D.
  
  10H
14.

Total no. of interrupt sources in 8051 including RESET is,
- A.
  
  4
- B.
  
  5
- C.
  
  6
- D.
  
  7
15.

Which of the following is the highest priority interrupt in 8051
- A.
  
  EXTERNAL INT0(IE0)
- B.
  
  TIMER 0
- C.
  
  EXTERNAL INT1(IE1)
- D.
  
  TIMER 1
16.

Total no. of PINs and supply voltage of 8051
- A.
  
  40 pins and 5V
- B.
  
  20 Pins and 8V
- C.
  
  40 Pins and 8V
- D.
  
  20 Pins and 5V
17.

Parity flag in 8051 is set when,
- A.
  
  No. of 1s in Accumulator is odd
- B.
  
  No. of 1s in Accumulator is even
- C.
  
  No. of 0s in Accumulator is odd
- D.
  
  No. of 0s in Accumulator is even
18.

Total No. of Bits in PSW register is ,
- A.
  
  4
- B.
  
  8
- C.
  
  12
- D.
  
  16
19.

Which of the following registers is used for external data memmory access?
- A.
  
  PCON
- B.
  
  DPTR
- C.
  
  PSW
- D.
  
  TCON
20.

Identify the addressing mode in the following instruction MOV A,40H
- A.
  
  Direct addressing mode
- B.
  
  Indirect Addressing mode
- C.
  
  Register indirect addressing mode
- D.
  
  Immediate Addressing Mode
21.

Which of the following peripherals is used to control the flow of interrupts,
- A.
  
  8255
- B.
  
  8259
- C.
  
  8279
- D.
  
  8251
22.

No. of address lines in 8051 architecture is..
- A.
  
  8 bit
- B.
  
  16 bits
- C.
  
  24 bits
- D.
  
  3o bits
23.

No. of address lines in 8051 architecture is..
- A.
  
  8 bit
- B.
  
  16 bits
- C.
  
  24 bits
- D.
  
  3o bits