JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD
JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III MICROPROCESSORS AND MICROCONTROLLERS Previous Question Paper (July - 2023 - R16)
Note: i) Question paper consists of Part A, Part B. ii) Part A is compulsory, which carries 25 marks. In Part A, Answer all questions. iii) In Part B, Answer any one question from each unit. Each question carries 10 marks and may have a, b as sub questions.
Part A
Define instruction pipelining of 8086 microprocessor.
Answer
Instruction pipelining in the 8086 microprocessor is a technique where the processor overlaps the execution of different instructions to increase throughput. The 8086 architecture uses a two-stage pipeline consisting of the Bus Interface Unit (BIU) and the Execution Unit (EU). While the EU is busy executing a current instruction, the BIU simultaneously fetches subsequent instructions from memory and stores them in a 6-byte instruction queue, effectively eliminating the idle time of the execution unit.
What is an assembler? Give any four assembler directives.
Answer
An assembler is a software program that converts assembly language source code, which consists of mnemonic instructions and labels, into machine-readable object code (binary code) that the microprocessor can execute directly. It translates symbolic instructions into their corresponding machine opcodes and resolves memory addresses and labels.
Four common assembler directives are:
- DB (Define Byte): Allocates one or more bytes of memory and initializes them with specified values.
- DW (Define Word): Allocates one or more words (two bytes each) of memory and initializes them.
- EQU (Equate): Assigns a specific value or expression to a symbolic name, which does not occupy memory but is used for constant definition.
- ORG (Origin): Specifies the starting memory address for the subsequent code or data in the program.
What is the significance of PSEN pin of 8051 microcontroller?
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Give port II structure of 8051 microcontroller.
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Give the control word structure of 8251 PPI.
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Write the features of 8251 USART.
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What are the different applications of ARM controller?
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List out different interrupts occurred in ARM controller.
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What are Interrupt controller of ARM cortex processor?
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List out families of OMAP processor.
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Part B
What are the different segments registers in 8086? Why need memory segmentation?
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What is the length of the instruction Queue in 8086? Discuss the use of the queue. Explain the reason for limiting the length of the queue.
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Explain the different assembler directives used in 8086 microprocessor.
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Explain the following instructions: i) AAS ii) DIV iii) CALL
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Discuss about memory organization of 8051 microcontroller.
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What is the purpose of using I/O ports of 8051? Classify and explain them in detail.
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Explain the interrupt structure of 8051 Microcontroller.
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Draw the 8051 Microcontroller architecture and explain its operation in detail.
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Draw the internal architecture of USART 8251 and explain its different status and modes and control formats neatly.
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Write short notes on Traffic light controls interfacing with 8051.
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Explain the methods of serial communications with examples.
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Write short note son A/D convertor interfacing with 8051.
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Explain the different Thumb programming model of ARM controller with examples.
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Write short notes on subroutines in ARM processor.
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Draw the architecture of ARM controller and explain the operation of each block in it.
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List out different applications of ARM processor.
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Draw and explain the functional description and NVIC programmers’ model in detail.
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Draw the block diagram of ARM Cortex-M processor and explain its operation.
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Explain the Programmers Models of ARM processor in detail.
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