EJM – 153

*EJM153*

I Semester M.E. (Power Electronics) Degree Examination, March 2013 (2K8 Scheme) PE 115: ADVANCED MICROPROCESSORS AND MICROCONTROLLERS Time : 3 Hours

Max. Marks : 100

Instruction : Answer any five full questions. 1. a) What is a flag ? Explain the flag registers of 8086 microprocessor. b) Explain the concept of segment memory. What are its advantages ? c) Explain different registers of 8086 microprocessor. 2. a) What is an assembler directives ? Explain any four of them.

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b) Write an assembly language program using 8086 instructions to add N-BCD numbers. 10 3. a) What is bus controller ? With neat diagram explain 8288 bus controller. b) What do you mean by co-processor ? Explain the importance of it in a microcomputer system. 4. a) Design an interfacing circuit for the communication between two microcomputers using 8255.

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b) With the help of neat diagram, explain how multiplexed address-data bus of 8088 can be demultiplexed.

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5. a) With neat block diagram, explain the architecture of 80386 microprocessor.

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b) Explain the bank switching method of expanding the memory of a microcomputer system. 6. a) Explain the memory structure of 8051microcontroller.

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b) List the registers of 8051 microcontroller and explain in brief.

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c) Briefly explain the embedded microcontroller and external memory microcontrollers.

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7. a) Discuss the architectural features of ADSP21XX DSP controller. b) With an example for each, explain different addressing modes of 8051 microcontroller. ———————

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