JNTU
JNTU B.Tech III MICROPROCESSORS AND MICROCONTROLLERS Previous Question Paper (January/February - 2023 - R18)
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
List the dedicated interrupts of 8086 microprocessor.
Answer
The 8086 microprocessor has the following dedicated (non-maskable) interrupts:
- Type 0: Divide Error Exception (occurs during DIV or IDIV instructions when the quotient exceeds the capacity of the destination register).
- Type 1: Single-Step Interrupt (used for debugging, triggered when the Trap Flag is set).
- Type 2: Non-Maskable Interrupt (NMI, triggered by an external signal on the NMI pin).
- Type 3: Breakpoint Interrupt (triggered by the INT 3 instruction).
- Type 4: Overflow Interrupt (triggered by the INTO instruction when the Overflow Flag is set).
Define macro with example.
Answer
A macro is a block of code in assembly language that is defined once and can be invoked multiple times throughout a program. Unlike a procedure, which uses the CALL instruction to transfer control, the assembler replaces every occurrence of the macro name with the actual body of code defined within the macro during the assembly process, a technique known as macro expansion.
Example:
MOV AX, A
ADD AX, B
ENDM
In this example, calling SUM_MACRO 5, 10 in the code instructs the assembler to replace that line with the instructions MOV AX, 5 and ADD AX, 10.
What is the difference between microprocessor and microcontroller?
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Explain PSW of 8051 microcontroller.
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List out the important features of the A/D converter.
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What is the significance of EA pin?
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What is ‘Thumb’ in ARM processor?
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Differentiate between CPSR and SPSR.
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Write two features of Cortex processors.
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Briefly explain about memory map of Cortex processors.
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Part B
Explain the concept of segmented memory. What are the advantages?
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Describe the implementation of pipelined process of 8086.
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Write an assembly language program to count number of even and odd numbers in the array of sixteen bit numbers.
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List out the shift and rotate instructions of 8086 microprocessor with examples.
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Explain the concept of memory organization of 8051 microcontroller.
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Explain the addressing modes in 8051 microcontroller.
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Draw the pin Diagram of 8051 microcontroller and explain the function of each pin in detail.
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Write a program to count the numbers of 1’s and 0’s in 8-bit data stored.
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Draw the internal RAM organization of 8051 microcontroller and explain it.
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Explain RS-232 Standards.
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Explain the timer control register and timer mode control register.
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Discuss about 8051 serial port programming.
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Draw the architectural block diagram of ARM and explain data flow referring each unit.
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Explain the working of “Barrel shifter” with an example instruction and diagram.
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Explain the three-stage pipelining implemented in ARM processor.
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Explain the different exceptions in ARM processors.
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What are the advantages of Cortex processors.
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Explain the architecture of Cortex processor.
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What are the advantages of OMAP processors.
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Explain the architecture of OMAP processor.
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