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 EEC 014 Microcontroller Question Paper
(Following Paper ID and Roll No. to be ?lled in your
Answer Books)
PaperID:131654 R011N0.| I I I I I | | | |
B.TECH.
Theory Examination (Semester?VI) 2015-16
MICROCONTROLLER
Time : 3 Hours Max. Marks : 100
Section-A
1. Attempt all parts. All parts carry equal marks. Write
answer of each part in short. (2X10=20)
(a) What is the role of processor reset and system reset?
(b) De?ne the term RISC and CISC.
(C) Draw the PSW format of 8051 microcontroller & state
various conditions of ?ags.
((1) Is it possible to write PSW register? In 8051, which
register bank con?icts with the stack?
(e) How Embedded Microcontrollers are differing than
Embedding Microprocessor?
(f) How Will you assign Counter to count an external event?
1 (1) P.T.O.
(g)
(h)
(i)
0)
Compare microprocessors and microcontrollers.
If you write to SBUF in serial mode 1, nothing is being
transmitted. What may be the probable reason for this.
What is the advantage of two or three level handling of
interrupts?
What is special about the auto - reload mode?
Section-B
Attempt any ?ve questions from this section. (10X5=50)
(a)
(b)
(d)
Is it possible to address 8051 individual bits? What are
the addresses of bit addressable locations? How is bit
addressing distinguished from the byte?wise addressing
by the 8051 microcontroller? Explain.
Generate a square wave with an ON time of 5 ms and
on OFF time of 7ms on all pins of portO. Assume an
XTAL 0f 22MHz.
Enlist Draw generalized functional block diagram of a
8051 microcontroller specifying each block.
A simple 8-bit analog-to-digital converter device, as
shown, is to be interfaced to an 8051 microcomputer.
(2) P.T.O.
The READY line goes low when conversion data is
available. The READY line should be used to interrupt
the 8051 microcontroller.
AFD
Vin C om?erter 87bit
d1g1tal data
?*
Read}? 1|?
i With the aid of a block diagram show how this
device can be interfaced to the 8051.
ii. Write an assembly language program Which Will
capture 250 data samples from the A/D converter
and store this data in XDATA memory. The pro-
gram is to be interrupt driven.
(e) Draw a simple block diagram for the transmitter section
of an 8051 UART Which supports 9-bit data transmis-
sion. Brie?y explain the function of each block in your
diagram.
(1) What does it mean When it is said that a given sensor
has a linear output? Draw 8051 connection to ADC0848
and Temperature Sensor.
(g) Draw the architecture of 8096 microcontroller and com-
pare With 8051 architecture
(3) P.T.O.
(h) Descrlbe MC68HC11 microcontroller main Features With
its Architecture.
Section-C
Attempt any two questions from this section. (15X2=30)
3. (i) Assume that XTAL=11.0592 MHz. What values do
we need to load timer's registers if we want to have time
delay of 2ms? Show the program for Timer 1 to create
a pulse width of 2111s on P2.3.
(ii) Assume that bit P22 is used to control the outdoor light
and bit P2.5 to control the light inside a building .Show
how to turn on the outside light & tum 01f the inside one.
4. (i) Write the following program: Create a square wave of
50% duty cycle on bit-O of PORT?l.
(ii) Discuss the use ofPUSH and POP Instructions in sub-
routines.
5. (i) Write down the different steps must be taken program-
ming the 8051 to receive data serially.
(i1) Draw interface schematic of an 8051 connection to eX-
ternal data 16 K X 8 RAM.
1 (4) P.T.O.
This post was last modified on 29 January 2020