Download AKTU B-Tech 6th Sem 2015-2016 NEC 022 Microcontroller Its Applications Question Paper

Download AKTU (Dr. A.P.J. Abdul Kalam Technical University (AKTU), formerly Uttar Pradesh Technical University (UPTU) B-Tech 6th Semester (Sixth Semester) 2015-2016 NEC 022 Microcontroller Its Applications Question Paper

Printed Pages: 4 NEC-022
(Following Paper ID and Roll No. to be ?lled in your
Answer Books)
RouNoJ F11 LT] l1l
B.TECH
Theory Examination (Semester-Vl) 2015-16
MICROCONTROLLER & ITS APPLICATIONS
Time : 3 Hours Max. Marks : 100
Section-A
1. Attempt all parts. All parts carry equal marks. Write
answer of each part in sort. (2X10 = 20)
(a) What is the difference between microprocessor and
microcomputer?
(b) What is CISC?
(0) Give 8 and 16 bit registers of 8051.
(d) Give addressing mode of MOVA. #65h.
(e) Which port of 8051 requires pull?up resistors?
(1) P.T.O.
2705/3179/194/4850

(1) What do you understand by MOVC A, @ A +DPTR?
(g) Find the timer control frequency and the period of 8051
based system with crystal frequency of 12MHz.
(h) A given memory block use address 4000h-7FFFh. How
(1
much memory Kbytes in this block? ( )
(i) Which port of 8051 provide A8-A15? (e)
(i) In accessing external stored program code the PSEN is
always activated, explain why?
(0
Section-B
(g)
2. Attempt any five questions from this section.
(10X5 = 50) (h)
(a) Write a program to get x value from P1 and send x2
continuously to P2.
(b) Describe 8051 ?ag bits and PSW register.
(0) CLR OFh,
(d) SETB 28h,
(e) CLR 12
Explain Serial communication procedure in 8051
through interrupts.
Write an 8051 C program to toggle all bits of P1
continuously. Explain LED connection diagram.
Explain the ?mction of ADC0808/0809 with 8 analog
channel.
With the help of diagram explain Temperature sensor
(LM35) interfacing with 8051 based system.
With the help of diagram show LCD connections to 8051
and explain its ?mctioning.
Section-C
N ote : Attempt any two questions in this section. (15X2 = 30)
(c) Find out to which byte each of the following bits belong.
Give address of RAM byte in hex. 3. (a)
(a) SETB 42h, (b)
(b) CLR 47h, (C)
(2)
Draw the block diagram of 8051 architecture.
Draw programming model of 805 1.
Mention the speci?c features of 805 1. Indicate bit ad-
dressable registers.
(3) P.T.O.
2705/?09/194/4850 2705/509/194/4850

(b)
(b)
(C)
2705/50-9/194/4850
Give internal RAM organization specifying working
registels, bit addressable register and general purpose
registels.
Explain stack and stack pointer. With the help of an
example explain stack organization,
What do you understand by special function registers
(SFR). Give their name, function and RAM address
(HEX).
Show the design of an 8031 based system with 8kbyte
of program ROM and 8 kbyte of data ROM.
In certain application we need 256 kbye of NV-RAM to
store data collected by 8051 microcontroller.
(i) Show the connection of an 8051 to single 256k X 8
NV?RAM chip
(i1) Show how various blocks of this single chip accessed?
Draw the diagram of 8031 connection to external pro-
gram ROM and 8255.
(4)