Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (EEE)- Electrical And Electronics Engineering 2020 December 6th Sem 71150 Microcontroller And Plc Previous Question Paper
Total No. of Pages : 02
Total No. of Questions : 18
B.Tech.(Automation & Robotics) (2012 & Onward)/
(EE/Electrical & Electronics Engg.) (2012 Onwards)/
(Electronics & Electrical Engg.)/(Electrical Engineering & Industrial
Control) (2012 to 2017)
(Sem.?6)
MICROCONTROLLER AND PLC
Subject Code : BTEE-604
M.Code : 71150
Time : 3 Hrs. Max. Marks : 60
INST RUCT IONS T O CANDIDAT ES :
1 .
SECT ION-A is COMPULSORY cons is ting of TEN questions carrying TWO marks
each.
2 .
SECT ION-B c ontains F IVE questions c arrying FIVE marks eac h and s tud ents
have to atte mpt any FOUR q ues tions.
3 .
SECT ION-C contains THREE questions carrying T EN marks e ach and s tudents
have to atte mpt any T WO questio ns.
SECTION-A
Answer briefly :
1.
For a time delay of 25ms, what value do you need to load into the timer registers? (Assume
XTAL = 11.0592 MHz)
2.
Compare memory mapped I/O and peripheral mapped I/O.
3.
Show the connections of LCD interfacing with 8051.
4.
What is the use of PLD and FPGA?
5.
What are vectored and non-vectored interrupts?
6.
Write a program to subtract the contents of R1 of Bank0 from the contents of R0 of Bank1.
7.
What is the difference between the Microprocessors and Microcontrollers?
8.
Explain the functions of the pin PSEN of 8051.
9.
What is the difference between the instructions "LCALL" and "ACALL"?
10. Discuss the function of PLC retention timer.
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SECTION-B
11. Differentiate between programmable logic controller and computer.
12. Distinguish between interrupt and polling. Discuss various types of interrupts in 8051.
13. Explain the functional pin diagram of 8051 Microcontroller.
14. List and explain the addressing modes of 8051 with taking two examples for each
addressing modes.
15. WAP to add 10 bytes of data stored at RAM memory 41H to 50H and save the result at
61H and 62H memory locations.
SECTION-C
16. a) Describe SCON and TCON registers of 8051 microcontroller.
(5)
b) Write a program to generate 2KHz square wave on pin P1.0 of port 1 of 8051 by using
timer 1 in mode 1. Assume XTAL = 11.0592 MHz.
(5)
17. With a neat circuit diagram explain how a keyboard is interfaced with 8051 microcontroller
and write 8051 ALP for keypad scanning.
(10)
18. a) Write a program that continuously gets a single bit of data from P2.4 and sends it to
P2.2, while simultaneously (a) creating square wave of 10 ms period on P2.7, and
(b) sending message "GET READY" stored at ROM locations starting at 0200H. Use
timer 0 to create the square wave. Assume XTAL = 22 MHz and 4800 baud rate. (8)
b) Write a program to divide two 8 bit numbers and save the result in 50H and 51H
memory location.
(2)
NOTE : Disclosure of identity by writing mobile number or making passing request on any
page of Answer sheet will lead to UMC case against the Student.
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This post was last modified on 13 February 2021