University of Mumbai 2007-6th Sem B.E Electrical and Electronics Engineering Microprocessors & Systems - Question Paper
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Con/4898-07. {REVISED COURSE) CD-5526
(3 Hours) [Total Marks : 100
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N.B. : (1) Question No. 1 is compulsory.
(2) Attempt any four questions out of remaining six questions.
(3) Assume any suitable data wherever required but justify the same.
(4) Figures to the right indicate full marks.
(5) Answer to questions should be grouped and written together.
Q.I A- Explain the following states of 8085 microprocessor 5
i) Fetch iii) Reset
ii) Execution iv) Hold v) Half
13. Differentiate between I/O mapped and memory mapped I/O. 5
C. Explain strobbed input-output mode operating mode of 8255. 5
D. A two phase bipolar winding stepper motor is to be interfaced with 8085 microprocessor. 5 Dmw the interfacing diagram.
Q.2 A. Write a program to add two multibyte numbers 10
B. Draw and explain the timing diagram of INR M instruction. 10
Q J A.) What are different functional blocks of 8259A chip? Explain the role of IRR* ISR, IMR and 10 priority resolver in processing any interrupt request by 8259A.
Design interrupt driven RTC using RST 7.5 interrupt. 10
Q.4 A. Explain various parameter passing techniques. 10
B. Write an assembly language program to generate a square-wave of I Hz using 8254. Use 10 counter and counLer 1 in cascade, show its connections. Assume system clock frequency
5 MHz.
Q.5 A. Design 8085 based temperature control system. Show hardware interface. Write a program to 15 control the temperature.
B. Explain the following terms 05
i) Throughput Ii) Interrupt latency
iii) Task time iv) MIPS v) DMA
Q.6 A. Write a program to generate triangular waveform of peak value 5V using DAC 10
interfaced with 8155.
B. Explain the sequential operation of calculator type display of 8279. 10
Q.7 A. Write short notes on any two:- 20
a) Methods of Time delay
b) 8085 microprocessor based minimum system.
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