University of Mumbai 2009-4th Sem B.E Information Technology mbai university, 09, SE IT - Question Paper
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Con. 2573-09. {REVISED COURSE) VR-3852
(3 Hours) [Total Marks : 100
N.B. : (1) Question No. 1 is compulsory.
(2) Attempt any four questions from remaining.
(3) Assume suitable address and data if necessary.
(4) Figures to the right indicate full marks.
1. (a) Design 8031 based microcontroller system with following details 15
(i) 32 KB Program memory using 27256 chip
(ii) 32 KB Data memory using 61256 chip
(iii) 3, 8-bit I/O ports using 8255
(iv) 8-bit ADC 804.
(b) Explain the following Instructions 5
(i) XLAT
(ii) MOVC A, @A +DPTR , (iii) LEA destn, source
(iv) SCASW destn
(v) ACALL address.
2. (a) Write an 8086 Assembly Language Program to generate an square wave of 1 kHz at 8
one of the bit of output port. An 8086 microprocessor is running at 5 MHZ. Show delay calculations.
(b) Write 8086 assembly language program to display 'O' through 'g' and A1 through T at 12 seven segment display connected at output port OD4H. Assume a delay between two digits. The Codes for 16 digits are stored in data segment. Make use of a procedure for writing program.
3. (a) Draw the interfacing diagram for 8086 base system configured in maximum mode with 12
following specifications
(i) 8086 working at 5 MHz
(ii) 16 KB EPROM device
(iii) 32 KB SRAM device to include IVT. Use full decoding technique. Draw the memory map for above interface.
(b) What are the conditions that will caues BIU to suspend fetching instructions. Under what 8 condition will the contents of the queue hold the ''wrong'' op-codes ?
4. (a) Write a program that continuously gets 8-bit data from port P0 and sends it to port P2 10
while simultaneously creating a square wave of 1 kHz on port bit P1 -5. Use timer. 0 to create square wave. Assume XTAL = 11 -0592 MHz.
(b) Write 8051 'C' program to transfer "ENGINEER' serially at 9600 baud rate. (8-data bits 10 and 1 stop bit). Do this continuously.
5. (a) Give the addressing modes of 8086 microprocessor with suitable examples. 10
(b) Explain the modes of 8255 PPI which support handshaking (provide necessary timing 10 diagrams)
6. (a) 4x4 key matrix is to be interfaced to 8051. Show the required interface and write the 10
program to read the pressed key.
(b) Determine the value of register 'Sp' after the foliowing instructions are executed. 5
mov SP. Offff H PUSH f PUSH C X CALL DELAY POP CX.
(c) What is memory segmentation in 8086 ? Explain and give its advantages. 5
Write short notes on (any three)
(a) Port structure of 8051
(b) PIC Architecture
(c) Interrupts of 8086
(d) Addressing modes of 8051
Con. 5211-09. (REVISED COURSE) SP-7892
; y OTtoceaso?|Hrs-ofcveotai Marks; 100
a/;/a3 N.B. : (1) Question No. 1 is compulsory.
(2) Attempt any four questions from the remaining. c_
(3) Assume suitable address and data if necessary.
(4) Figures to the right indicate full marks.
1. Explain architecture of 8086 micro-processor and its minimum and maximum mode 20 operation in detail.
2. (a) Explain architecture of 8051 micro-controller. 10 (b) Explain addressing modes of 8086 micro-processor. 10
3. (a) Explain jump and call instruction of 8051 mico-controller with example. 10 (b) Assume P1 is an i/p port connected to a temperature sensor. 10
Write a program to read the temperature and test it for the value 75. According to the test results, place the temperature value into the registers indicated by the following
if T = 75 then A = 75 if T < 75 then R1 = T if T > 75 then R2 = T
4. (a) Explain interface of temperature sensor with 8051 micro-controller. 10 (b) Assuming that clock pulses are fed into pin T1. Write a program for counter 10
1 in mode 2 to count the pulses and display the state of TL1 count on P2.
5. (a) Explain interfacing of 8051 with 8255 PPI. 10 (b) Write an assembly language program to check whether a string is palindrome 10
or not.
6. (a) Explain register file structure and addressing modes of PIC micro-controtler. 15 (b) Give the difference between procedure and macros. 5
7. Write short notes on any three 20
(a) Mixed language programming in 8086
(b) Timer mode register
(c) DS 12887 RTC interfacing
(d) Interrupts of 8086.
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