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# Microprocessor and Interfacing B.Tech 5th semester sample paper Dec-2014

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#### Microprocessor and Interfacing B.Tech 5th semester sample paper Dec-2014Paper Code: EE-309-F

Note : Attempt five questions in total selecting one question from each of the four units. Question No.1 is compulsory.
Q.1.
• (a) Differentiate vectored and non-vectored interrupt.
• (b) What is pipelining ? How does this occur.
• (c) What are the advantages/disadvantages of memory mapped I/O over I/O mapped I/O ?
• (d) Explain the difference between segment and FROC directives.
• (e) Explain hidden DMA.
Q.2.(a). Describe the Pin diagram of 8085 microprocessor.
Q.2.(b). Write an assembly language program to find the number of negative number in the array.

Q.3.(a). What is interrupt ? Explain interrupt structure of 8085 microprocessor with suitable diagram ?
Q.3.(b). Write an assembly language program to transfer 150 byte of data from memory location starting at 21000H to memory addressed by 31000H.

Q.4.(a). Explain BIU and EU of 8086 microprocessor.
Q.4.(b). What is pipelining ?
Q.5.(a). Calculate the physical address represented by :
(i). 1234 H : 0002H
(ii). F2 F2 H : 1234H
Q.5.(b). Describe the 8086 instruction queue. Explain the advantages of program relocation in 8086 microprocessor.

Q.6.(a). Explain directives and identifiers used in 8086 microprocessor.
Q.6.(b). Write a simple assembly language program to add two memory locations where each memory location is one byte wide.

Q.7.(a).Explain NOP and HLT instructions with the help of suitable example
Q.7.(b). Explain intruction execution timing with example.

Q.8.(a). Describe the major components of 8279 keyboard/display/CPU interface with the help of its block diagram.
Q.8.(b). List the operating modes of 8255 PPI chip.

Q.9.(a). Explain 8237 DMA controller with help of Pin diagram.
Q.9.(b). Explain :
(i). Mode-2 strobbed bidirectional I/O of 8255
(ii). Priority Resolver.