Name of the College : Sphoorthy Engineering College
University : JNTUH
Department : MECHANICAL ENGINEERING
Subject Name : MICROPROCESSORS AND INTERFACING
Degree : B.Tech
Year/Sem : III/I
Website : sphoorthyengg.com
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/sphoorthyengg.com/4721-RR312001%20-%20MICROPROCESSORS%20AND%20INTERFACING.pdf
Microprocessors & Interfacing Question Paper
B. Tech III Year I Semester Examinations, December-2011
Time: 3 hours
Max. Marks: 80
Related : Sphoorthy Engineering College RR311201 Software Engineering B.Tech Question Paper : www.pdfquestion.in/4730.html
Answer any five questions :
All questions carry equal marks ;
1.a) Explain about physical memory organization with neat block diagram.
b) Explain how a microprocessor differentiates between an opcode and instruction data. [8+8]
2.a) Explain what happens if the offset address exceeds the size of the segment? Does it wrap around the same segment or move to the segment?
b) In an instruction Mov AX, [BP+DI], both BP and DI are used as offset, what will be the default register? Explain with reason
c) After the execution of the instruction LEA AX,[BP+FI+50H] give the contents of the register AX and the flags ZF,S,CF and OF. [4+4+8]
3.a) Discuss various branch instruction of 8086 microprocessor, that are useful for relocation?
b) Write an assembly language program using the Logical Instructions XOR, AND and arithmetic instructions to display a number in BCD format. [8+8]
4.a) Explain in detail the difference between near CALL and far CALL.
b) What is the need for intersegment and intrasegment call instructions in the 8086? Explain in detail. [8+8]
5.a) Write an 8086 program to delete a substring from a main string whose starting data base is 6DH and ends with 00H. Also give the new length of the string after deletion.
b) Why is an interrupt driven I/O more efficient than programmed I/O for 8086 Microprocessor? [12+4]
6.a) Interface a typical 12-bit DAC with 8255 and write a program to generate a square waveform of period 10 ms. The CPU run at 5 MHz clock frequency.
b) Explain why 8255 ports are divided into two groups? Discuss how these groups are controlled in different modes of operation? Explain different control signals and their associated pins for bi-directional I/O mode of operation? [8+8]
7.a) What is a transducer? How do you interface temperature transducers to 8086 processor and briefly explain the block schematic.
b) Explain how a floppy disk controller is interfaced to an 8086 Processor with neat diagram. [8+8]
8. Write short Notes on any TWO
a) Addressing Modes of 8086
b) Interrupts and Interrupt Routines
c) Interfacing of Stepper motor to 8086. [16]
RRCode No: RR312001 SET-2
1.a) Discuss various branch instruction of 8086 microprocessor, that are useful for relocation?
b) Write an assembly language program using the Logical Instructions XOR, AND and arithmetic instructions to display a number in BCD format. [8+8]
2.a) Explain in detail the difference between near CALL and far CALL.
b) What is the need for intersegment and intrasegment call instructions in the 8086? Explain in detail. [8+8]
3.a) Write an 8086 program to delete a substring from a main string whose starting data base is 6DH and ends with 00H. Also give the new length of the string after deletion.
b) Why is an interrupt driven I/O more efficient than programmed I/O for 8086 Microprocessor? [12+4]
4.a) Interface a typical 12-bit DAC with 8255 and write a program to generate a square waveform of period 10 ms. The CPU run at 5 MHz clock frequency.
b) Explain why 8255 ports are divided into two groups? Discuss how these groups are controlled in different modes of operation? Explain different control signals and their associated pins for bi-directional I/O mode of operation? [8+8]
5.a) What is a transducer? How do you interface temperature transducers to 8086 processor and briefly explain the block schematic.
b) Explain how a floppy disk controller is interfaced to an 8086 Processor with neat diagram. [8+8]
6. Write short Notes on any TWO
a) Addressing Modes of 8086
b) Interrupts and Interrupt Routines
c) Interfacing of Stepper motor to 8086. [16]
7.a) Explain about physical memory organization with neat block diagram.
b) Explain how a microprocessor differentiates between an opcode and instruction data. [8+8]
8.a) Explain what happens if the offset address exceeds the size of the segment? Does it wrap around the same segment or move to the segment?
b) In an instruction Mov AX, [BP+DI], both BP and DI are used as offset, what will be the default register? Explain with reason
c) After the execution of the instruction LEA AX,[BP+FI+50H] give the contents of the register AX and the flags ZF,S,CF and OF. [4+4+8]