Microprocessors and Microcontrollers (3160914) MCQs

MCQs of 8051 Microcontroller Architecture

Showing 51 to 60 out of 89 Questions
3 4 5 6 7 8
51.

WR pin is _____ no of pin in 8051

(a)

1
(b)

4 
(c)

16
(d)

18
Answer:

Option (c)

52.

RD is _________ pin in 8051

(a)

23
(b)

24
(c)

18
(d)

17
Answer:

Option (d)

53.

Function of EA pin in 8051 is 

(a)

Used to enable/disable external memory interfaccing
(b)

Used for latching adress and data bus
(c)

Used for Power Supply
(d)

None of the above
Answer:

Option (a)

54.

The function of RXD pin in 8051 is _______ 

(a)

Serial data recieving
(b)

Timing operation
(c)

Interrupts
(d)

None of the above
Answer:

Option (a)

55.

The function of TXD in 8051 is _______ 

(a)

Sending Serial Data
(b)

Counting Operation
(c)

Input Data
(d)

None of the abive
Answer:

Option (a)

56.

The function of PSEN pin in 8051 is for 

(a)

Reading signal from internal memory
(b)

Read a signal from external memory
(c)

Transmit data from internal memory 
(d)

None of the above
Answer:

Option (b)

57.

Full form of PSW register is 

(a)

Program Status Work
(b)

Program Status Word
(c)

Program Sending Word
(d)

None of the above
Answer:

Option (b)

58.

The RS0 and RS1 is ________ bit of PSW register

(a)

1-2
(b)

2-3
(c)

3-4
(d)

4-5
Answer:

Option (c)

59.

By setting 0-0 in RS0 and RS1 bit in PSW which register is selected?

(a)

Register bank 0
(b)

Register bank 1
(c)

Register bank 2
(d)

Register bank 3
Answer:

Option (a)

60.

By setting 0-1 in RS0 and RS1 bit in PSW which register is selected?

(a)

Register bank 0
(b)

Register bank 1
(c)

Register bank 2
(d)

Register bank 3
Answer:

Option (b)

Showing 51 to 60 out of 89 Questions
3 4 5 6 7 8