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Posted Date: 12 Oct 2009 Posted By: tasneem Member Level: Gold
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2006 Anna University B.E Computer Science CS1304 MICROPROCESSOR AND MICROCONTROLLERS Question paper
B.E/B.TECH DEGREE EXAMINATION, NOV/DEC 2006
FIFTH SEMESTER
COMPUTER SCIENCE AND ENGINEERING
CS 1304- MICROPROCESSOR AND MICROCONTROLLERS
(REGULATION 2004)
TIME: THREE HOURS
MAXIMUM : 100 MARKS
Answer all the questions
PART A (10*2=20)
1.Name the various flag bits available in an 8085 microprocessor.
2.Give the significance of SIM and RIM instructions available in 8085.
3.What do you mean by pipelining in an 8086 processor?
4.How the 20 bit effective address is calculated in an 8086 processor?
5.What is the purpose of CLK signal in an 8086 system?
6.What is the use of latch signal on the AD0- AD15 bus in an 8086 system?
7.Name the two models used by DMA processor to transfer data.
8.Name the six modes of operation of an 8253 programmable interval timer.
9.Differentiate a microprocessor and a microcontroller.
10.Differentiate RRA and RRCA instructions in 8051 microcontroller.
PART-B- (5*16=80)
11.(a) (i) with a neat block diagram explain the architecture of an 8085 microprocessor? (12)
(ii) list out the maskable and non-maskable interrupts available in an 8085 processor? (4)
Or
(b) (i) how do the instructions of 8085 is classified based on their functions and word length? Give an example. (10)
(ii) write an ALP to add two 8 bit numbers. (6)
12 (a) (i). with a neat sketch explain the architecture of an 8086 processor. (12)
(ii). Give the significance of O flag, T flag and I flag, D flag of 8086. (4)
Or
(b) (i). explain on detail about the various addressing modes used in 8086 processor ? give an example. (12)
(ii) name the various segment registers and their usage in 8086 processor. (4)
13. (a) (i) explain the MIN/MAX mode of operation of an 8086 processor (10)
(ii) give a note on the role of a decoder in memory interfacing with an example. (6)
Or
(b) (i) explain in detail about 8086 memory banks and the associated signals for byte and word operations.
(ii) give the significance of RQ/GTO and IO/M signals (4)
14. (a) (i) with a neat sketch and explain the operation of an interrupt controller (8259) (14)
(ii) what is the use of CAS0,CAS1 and CAS2 signals?
Or
(b) draw the block diagram of a DMA controller (8237) and explain its operation. (16)
15 (a) with the help of a functional block diagram explain any one application of 8051 microcontroller. (16)
Or
(b) give the PIN details of an 8051 microcontroller and explain. (16).
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