Code No: R2032041 R20 SET -1

III B. Tech II Semester Regular Examinations, July -2023

MICRO PROCESSORS AND MICRO CONTROLLERS
(Electronics and Communication Engineering)
Time: 3 hours Max. Marks: 70
Answer any FIVE Questions ONE Question from Each unit
All Questions Carry Equal Marks
*****
UNIT-I
1. a) Draw the minimum mode pin diagram and explain the function of each pin in [7M]
detail.
b) Draw the timing diagrams of minimum mode write operation and explain in [7M]
detail.
(OR)
2. a) Draw the 8086 microprocessor internal architecture and explain the operation [7M]
of each block.
b) List out few comparisons of RISC and CISC processor. [7M]
UNIT-II
3. a) Define addressing mode and explain different addressing modes presented in [7M]
8086 microprocessor.
b) Write an Assemble language program to find the sum of squares of first ten [7M]
numbers.
(OR)
4. a) Write an Assemble language program to find number of even and odd numbers [7M]
in an 8- Bit array.
b) Explain the following instructions [7M]
( i) XCHG ( ii) PUSH (iii) CMP (iv) DAA
UNIT-III
5. a) With a neat diagram explain the architecture of 8255? [7M]
b) Draw and explain the interfacing of seven segment display with 8086 [7M]
microprocessor.
(OR)
6. Draw the internal architecture of USART 8251 and explain its different status [14M]
and modes and control formats neatly
UNIT-IV
7. a) Discuss about memory organization of 8051 microcontroller? [7M]
b) What is the purpose of using I/O ports of 8051? Classify and explain them in [7M]
detail?
(OR)
8. a) Write the salient features of 8051 family of microcontroller. [7M]
b) Write short notes on Traffic light controls interfacing with 8051. [7M]
UNIT-V
9. a) Explain in detail about ARM vs thumb programming model? [7M]
b) Explain the Stack and Stack pointer of a ARM processor in detail. [7M]
(OR)
10. Draw and explain the functional description and NVIC [14M]
programmers’ model in detail.
1 of 1

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 Code No: R2032041
R2031011
R2031351
R203135A
R203147A
R203147C
R203105O
P2031051 R20 SET
SET
RA--22

III B. Tech II Semester Regular Examinations, July -2023

MICRO PROCESSORS AND MICRO CONTROLLERS
(Electronics and Communication Engineering)
Time: 3 hours Max. Marks: 70
Answer any FIVE Questions ONE Question from Each unit
All Questions Carry Equal Marks
*****

UNIT-I
1. a) What are the different segments registers in 8086? Why need memory [7M]
segmentation?
b) What is the length of the instruction Queue in 8086? Discuss the use of the [7M]
queue. Explain the reason for limiting the length of the queue.
(OR)
2. a) Draw and explain the internal architecture of 8086 processor. [7M]
b) Give the difference between minimum mode and maximum mode of operation [7M]
in 8086 microprocessor?
UNIT-II
3. a) Define assembler and explain the different assembler directives used in 8086 [7M]
microprocessor.
b) Explain the programming development steps in 8086 microprocessor. [7M]
(OR)
4. a) Explain the following instructions [7M]
( i) AAS ( ii) DIV (iii) CALL (iv) RET
b) Develop an 8086 assembly language program to arrange the numbers in [7M]
ascending order.
UNIT-III
5. a) Draw the internal block diagram of 8259 PIC and explain its operation. [7M]
b) Explain the ICW’s and OCW’s of 8259 PIC. [7M]
(OR)
6. a) What is the advantage of DMA controlled data transfer over interrupt driven or [7M]
program controlled data transfer? Why are DMA controlled data transfers
faster?
b) Explain memory mapped I/O and I/O mapped I/O. [7M]
UNIT-IV
7. a) Discuss about the priority of the interrupts in 8051. And state for which [7M]
interrupt highest priority is given?
b) Describe the serial port operation in 8051 microcontroller? [7M]
(OR)
8. a) Explain various modes of operation of timer /counters in 8051? [7M]
b) Write short note son A/D convertor interfacing with 8051. [7M]
UNIT-V
9. Draw the internal architecture of ARM controller and explain its operation. [14M]
(OR)
10. a) Explain the Programmers Models of ARM processor in detail. [7M]
b) Write short notes on Nested Vectored Interrupt Controller in detail. [7M]
1 of 1

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 Code No: R2032041
R2031011
R2031351
R203147A
R203147C
R203105O
P2031051
R203135A R20 SET
SET
RA--32

III B. Tech II Semester Regular Examinations, July -2023

MICRO PROCESSORS AND MICRO CONTROLLERS
(Electronics and Communication Engineering)
Time: 3 hours Max. Marks: 70
Answer any FIVE Questions ONE Question from Each unit
All Questions Carry Equal Marks
*****

UNIT-I
1. a) Describe the memory segmentation and instruction queue? [7M]
b) Briefly explain register organization in 8086 microprocessor. [7M]
(OR)
2. a) Give the difference between maskable and non-maskable interrupts? [7M]
b) List out few compassions of Microprocessor and microcontroller. [7M]
UNIT-II
3. a) What are assembler directives? Explain any three assembler directives. [7M]
b) Write an assembly language program to generate fibonacci series up to a given [7M]
number.
(OR)
4. a) Develop an assembly language program to find the sum of numbers from 1 to [7M]
100.
b) List out assembler directives of 8086 and explain them briefly? [7M]
UNIT-III
5. a) Draw a typical stepper motor interface with 8255 and explain? [7M]
b) Draw and explain the interfacing of 8259 with 8086? [7M]
(OR)
6. a) Interfacing of a two 4X4 PROM and two 8X4 RAM with 8086 CPU, draw the [7M]
memory map and interfacing diagram for it, the RAM address follows the
ROM address.
b) Explain the methods of serial communications with examples. [7M]
UNIT-IV
7. a) Draw the pin diagram of 8051 microcontroller and explain the function of each [7M]
pin in detail.
b) List out different futures of 8051 Microcontroller. [7M]
(OR)
8. a) Draw the LCD Interfacing with 8051 microcontroller and explain its operation. [7M]
b) Explain the internal and external interrupts in 8051. [7M]
UNIT-V
9. a) Draw the block diagram of ARM Cortex-M processor and explain its [7M]
operation.
b) List out different applications of ARM processor. [7M]
(OR)
10. a) Explain the different Thumb programming model of ARM controller with [7M]
examples.
b) Write short notes on subroutines in ARM processor. [7M]
1 of 1

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 Code No: R2032041
R2031011
R2031351
R203135A
R203147A
R203147C
R203105O
P2031051 R20 SET
SET
RA--42

III B. Tech II Semester Regular Examinations, July -2023

MICRO PROCESSORS AND MICRO CONTROLLERS
(Electronics and Communication Engineering)
Time: 3 hours Max. Marks: 70
Answer any FIVE Questions ONE Question from Each unit
All Questions Carry Equal Marks
*****

UNIT-I
1. a) Explain the different minimum mode pins of 8086 microprocessor. [7M]
b) List different registers of 8086 microprocessor and explain. [7M]
(OR)
2. a) Draw the maximum mode pin diagram of 8086 microprocessor and explain [7M]
each pin in detail.
b) Draw the timing diagrams of minimum mode read operation and explain in [7M]
detail.
UNIT-II
3. a) Explain in detail various addressing modes of 8086 microprocessor with [7M]
necessary examples.
b) Write an ALP in 8086 to exchange a block of N bytes of data between source [7M]
and destination?
(OR)
4. a) Explain the stack structure of 8086 in detail with a sketch. [7M]
b) Explain while loop and repeat-until structures with an example. [7M]
UNIT-III
5. a) Draw the Internal diagram of 8237 DMA and explain its operation. [7M]
b) Differentiate between BSR and I/O modes of 8255 PPI. [7M]
(OR)
6. a) Draw the 8251 USART architecture and explain the operation of each block in [7M]
it.
b) Draw and explain the interfacing of analog to digital converter with 8086 [7M]
microprocessor.
UNIT-IV
7. a) Draw the 8051 Microcontroller architecture and explain its operation in detail. [7M]
b) Explain the timer and counter operations of 8051 Microcontroller. [7M]
(OR)
8. Write short notes on [5+5+4
(a) PSW (b) SCON (c) PCON M]
UNIT-V
9. a) Draw the architecture of ARM controller and explain the operation of each [7M]
block in it.
b) Write short notes on ARM Processors Families in detail. [7M]
(OR)
10. a) Explain the Programmers Models of ARM processor in detail. [7M]
b) Write short notes on Nested Vectored Interrupt Controller in detail. [7M]
1 of 1

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 Code No: R2032041 R20 SET -1

III B. Tech II Semester Supplementary Examinations, December -2023

MICRO PROCESSORS AND MICRO CONTROLLERS
(Electronics and Communication Engineering)
Time: 3 hours Max. Marks: 70
Answer any FIVE Questions ONE Question from Each unit
All Questions Carry Equal Marks
*****

UNIT-I
1. a) Draw the minimum mode pin diagram and explain the function of each pin in [7M]
detail.
b) Explain the differences between CISC and RISC architecture. [7M]
(OR)
2. a) Explain the control and conditional flags of 8086 with flag register. [7M]
b) Discuss the bus interfacing unit and execution unit of 8086 architecture. [7M]
UNIT-II
3. a) Develop an assembly language program to find the sum of numbers from 1 to [7M]
100.
b) Describe the arithmetic and logical instructions of 8086. [7M]
(OR)
4. a) Explain machine language instruction formats of 8086. [7M]
b) Explain any six assembler directives used in 8086 microprocessor. [7M]
UNIT-III
5. a) Explain the need of DMA. Discuss in detail about DMA data transfer method. [7M]
b) Explain different modes of operation of 8255 Programmable Peripheral I/O. [7M]
(OR)
6. a) Discuss the interfacing of stepper motor with 8086 along with figure and ALP. [7M]
b) Describe the 8251 USART architecture and interfacing with 8086. [7M]
UNIT-IV
7. a) Describe the addressing modes in 8051 microcontroller. [7M]
b) Explain the interfacing of Traffic light control with 8051 controller. [7M]
(OR)
8. a) Write an assembly language program using 8051 microcontroller instructions [7M]
to generate a square wave at port 1, pin 0 (i.e., P 1.0). The frequency of the
generated square wave is to be 1 kHz.
b) Discuss the register set and instruction set of 8051 microcontroller. [7M]
UNIT-V
9. a) Explain ARM Cortex-M Series Family in detail. [7M]
b) Explain Nested Vectored Interrupt Controller functional [7M]
description and programmers’ model.
(OR)
10. a) Draw the architecture of ARM controller and explain the operation of each [7M]
block in it.
b) Discuss the Stack structure and Stack pointer. [7M]
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 Code No: R2032041 R20 SET -1
III B. Tech II Semester Regular/Supplementary Examinations, May/June -2023
MICRO PROCESSORS AND MICRO CONTROLLERS
(Electronics and Communication Engineering)
Time: 3 hours Max. Marks: 70
Answer any FIVE Questions ONE Question from Each unit
All Questions Carry Equal Marks
*****
UNIT-I
1. a) Draw and explain the internal architecture of 8086 processor. [7M]
b) Draw the flag register of 8086 microprocessor and explain the function of each [7M]
flag with a suitable example.
(OR)
2. a) Draw a diagram showing the pins for 8086 microprocessor in the minimum mode [7M]
and describe purpose of each pin.
b) Explain different maskable and non maskable interrupts of 8086 microprocessor. [7M]
UNIT-II
3. a) Explain the data transfer instructions with suitable examples. [7M]
b) Write an Assembly language program to find number of even and odd numbers in [7M]
an 8- Bit array.
(OR)
4. a) Explain the programming development steps in 8086 microprocessor [7M]
b) Write an assembly language program to generate Fibonacci series up to a given [7M]
number.
UNIT-III
5. a) Draw and explain the Interface Eight 8K RAM chips and Four 8K×4 EPROM [7M]
chips with 8086 so as to form a completely working system configuration.
b) Explain the BSR mode of operation of 8255 programmable peripheral interface. [7M]
(OR)
6. a) Explain about the architecture of 8251 USART in detail. [7M]
b) Write an assembly language program in 8086 to generate a symmetrical square [7M]
wave with 1KHz frequency? Give the necessary circuit set up with a DAC.
UNIT-IV
7. a) Explain briefly the interrupts of 8051and indicate by their vector address. [7M]
b) Write a Assembly program to multiply the unsigned number in register R3 by the [7M]
unsigned number on port 2 and put the result in external RAM locations 10H
(MSB) & 11H(LSB).
(OR)
8. a) Describe function PSEN, EA, XTAL1 & XTAL2 pins of 8051 microcontroller [7M]
b) Explain the complete interfacing mechanism of a stepper motor with 8051 [7M]
Microcontroller.
UNIT-V
9. a) Explain the Functional Description of ARM Cortex-M3 Processor. [7M]
b) Explain nested interrupt handler with a neat sketch. [7M]
(OR)
10. a) Explain two stack model and reset sequence in ARM cortex M3. [7M]
b) Describe the Supervisor and Pendable Service Call exceptions targeted at [7M]
Software and operating systems.
1 of 1

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 Code No: R203147C
R2031011
R2031351
R203135A
R203147A
R203105O
P2031051
R2032041 R20 SET
SET
RA--22
III B. Tech II Semester Regular/Supplementary Examinations, May/June -2023
MICRO PROCESSORS AND MICRO CONTROLLERS
(Electronics and Communication Engineering)
Time: 3 hours Max. Marks: 70
Answer any FIVE Questions ONE Question from Each unit
All Questions Carry Equal Marks
UNIT-I
1. a) What are the different segment registers in 8086? What is the need for memory [7M]
segmentation?
b) Draw and explain the read and write cycle timing diagrams of 8086 in maximum [7M]
mode.
(OR)
2. a) Describe the implementation of pipelined process of 8086. [7M]
b) Compare the characteristics of CISC and RISC architectures. [7M]
UNIT-II
3. a) Explain the following instructions :i)HLT (ii)LOCK (iii)CLI (iv)XLAT (v) PUSH [7M]
(vi) POP with suitable examples.
b) Explain any six assembler directives used in 8086 microprocessor. [7M]
(OR)
4. a) Explain the 8086 steps involved in Program development. [7M]
b) Write an Assembly language program to add two 16-bit Hexa decimal numbers in [7M]
8086.
UNIT-III
5. a) Draw the Block diagram of 8237 DMA controller and explain its operations. [7M]
b) Draw and explain the synchronous mode transmitter and receiver data formats of [7M]
8251.
(OR)
6. a) What is the need for 8259 programmable interrupt controllers? [7M]
Explain its functioning.
b) Explain the interfacing procedure of an 8-bit ADC with 8086 microprocessor. [7M]
UNIT-IV
7. a) Explain briefly the interrupts of 8051and indicate by their vector address. [7M]
b) Write an ALP to find the first two internal RAM locations between 20h and 60 h [7M]
which contain consecutive numbers. If so, set the carry flag, else clear the flag.
(OR)
8. a) List and explain various addressing modes of 8051 microcontroller. [7M]
b) Draw and explain interfacing of 4×4 matrix keyboard with 8051microcontroller. [7M]
Write program to read switch.
UNIT-V
9. a) Describe the main features of the Cortex M3 processor core: architecture, [7M]
instruction set, instruction execution, pipe-line, major internal core blocks, and
operating modes. What's new comparing to the ARM7 core?
b) Explain the following ARM Cortex M# instructions with examples [7M]
i) RSB ii) ASR iii) BIC iv) BFI v) SBFX vi) REVSH
(OR)
10. a) Briefly explain about different data operations used in ARM processor. [7M]
b) Describe the Supervisor and Pendable Service Call exceptions targeted at Software [7M]
and operating systems
1 of 1

|'''|'|'|''||'''||||
 Code No: R2032041
R2031011
R2031351
R203135A
R203147A
R203147C
R203105O
P2031051 R20 SET
SET
RA--32

III B. Tech II Semester Regular/Supplementary Examinations, May/June -2023

MICRO PROCESSORS AND MICRO CONTROLLERS
(Electronics and Communication Engineering)
Time: 3 hours Max. Marks: 70
Answer any FIVE Questions ONE Question from Each unit
All Questions Carry Equal Marks
*****
UNIT-I
1. a) Explain significance of each bit of flag register of 8086 family microprocessor. [7M]
b) Draw the interrupt vector table of 8086 microprocessor and explain its operation in [7M]
detail.
(OR)
2. a) Draw the timing diagrams of minimum mode write operation and explain in detail. [7M]
b) Compare the Harvard and Von Neumann architectures with suitable examples. [7M]
UNIT-II
3. a) Describe in detail about the Procedures with suitable syntax and example. [7M]
b) Write an 8086 assembly language program to sort an array of data in descending [7M]
order.
(OR)
4. a) Describe the assembler directives of 8086 microprocessor.(i) ASSUME (ii) EQU (iii) [7M]
OFFSET with examples.
b) Explain in detail about the Stack Structure of 8086. Write a sample program to [7M]
illustrate the concept of programming the stack.
UNIT-III
5. a) Interface Eight 8K RAM chips and Four 8K×4 EPROM chips with 8086 so as to [7M]
form a completely working system configuration.
b) Discuss in detail the architecture of 8259. [7M]
(OR)
6. a) Draw the Block diagram of 8237 DMA controller and explain its operations. [7M]
b) Draw the Interfacing diagram of D/A Converter with 8086 Microprocessor along [7M]
with 8255 PPI and explain its operation.
UNIT-IV
7. a) Explain the following instructions of 8051 MC with example [7M]
i) ACALL ii) MOVC iii) JBC iv) CJNE
b) Write and explain the instructions to read the SBUF eight times with an interval of [7M]
0.33ms and save the results between the R0 and R7 of the register bank 0.
How does the timer overflow interrupt differ from real time clocked interrupts?
Discuss in detailed.
(OR)
8. a) Write an ALP to find the first two internal RAM locations between 20h and 60 h [7M]
which contain consecutive numbers. If so, set the carry flag, else clear the flag.
b) Discuss the internal memory organization of 8051 microcontroller. [7M]
UNIT-V
9. a) Describe in detail the modes of operation in ARM processor. [7M]
b) Write about the program status register instructions in ARM processor. [7M]
(OR)
10. a) Describe the Software Interrupt instructions in ARM. [7M]
b) Explain the functional description of a Nested Vectored Interrupt Controller and its [7M]
programmers’ model.
|'''|'|'|''||'''|||| 1 of 1
 Code No: R2031011
R2031351
R203135A
R203147A
R203147C
R203105O
P2031051
R2032041 R20 SET
SET
RA--42

III B. Tech II Semester Regular/Supplementary Examinations, May/June -2023

MICRO PROCESSORS AND MICRO CONTROLLERS
(Electronics and Communication Engineering)
Time: 3 hours Max. Marks: 70
Answer any FIVE Questions ONE Question from Each unit
All Questions Carry Equal Marks
*****
UNIT-I
1. a) Draw the register organization of 8086 Microprocessor and explain their [7M]
functions.
b) Explain different maskable and non maskable interrupts of 8086 microprocessor. [7M]
(OR)
2. a) Discuss the various pins in minimum and maximum mode configurations of 8086. [7M]
b) Explain the concept of memory segmentation and address calculation of 8086 [7M]
microprocessor.
UNIT-II
3. a) Write an assembly language program to find the largest number of an array 8- bit [7M]
array.
b) List the string manipulation instruction set of 8086 microprocessor with [7M]
examples.
(OR)
4. a) Explain the following instructions of 8086: i) AAM ii) DAS iii) LOCK iv) CALL. [7M]
b) Write an assembly language program to multiply two-bit Hexa decimal numbers [7M]
in 8086.
UNIT-III
5. a) Draw the interacting diagram of A/D convertor with 8086 microprocessor and [7M]
explain its operation.
b) Explain about the DMA data transfer method using 8237. [7M]
(OR)
6. a) With a neat block diagram, explain in detail the internal architecture of 8255 and [7M]
its registers.
b) Explain the procedure to interface stepper motor to 8086 processor. [7M]
UNIT-IV
7. a) Explain the functioning of PSW and TCON registers of 8051 microcontroller. [7M]
b) Explain briefly the interrupts of 8051and indicate by their vector address. [7M]
(OR)
8. a) Explain in detail timer modes of operation with necessary registers in 8051. [7M]
b) Write an assemble language program for LED blinking in 8051 microcontroller. [7M]
UNIT-V
9. a) Give the ARM Cortex-M3 Processor Functional Description. [7M]
b) Explain the following instructions with example: [7M]
i)SWP R0, R1 ii) MUL R1, R2, R3 iii) LDR R2, [R3] iv) UMULL R0, R1, R2, R3
v) ANDS R0, R1, R2 vi) BLNEXT
(OR)
10. a) Explain the internal architecture of ARM processor. [7M]
b) What is NVIC? Explain its programmers’ model. [7M]
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