Question 1
(a)
Explain bus organization in 8085 Microprocessor
3 Marks
(b)
Explain general purpose registors in 8085 Microprocessor
4 Marks
(c)
Explain de-multiplexing of AD0 – AD7 in 8085 microprocessor with suitable diagram
7 Marks
Gujarat Technological UniversitySummer 2025 Examination
GTU 3160712 Microprocessor and Interfacing (MPI) Summer 2025 Paper Solution & PDF
B.E. · Computer Engineering · Semester 6 · Subject Code: 3160712
Total Marks70 MarksExternal theory exam
Passing Marks23 Marks33% minimum cutoff
Exam Duration2.5 Hours10:30 AM – 1:00 PM
Paper Structure5 QuestionsWith internal OR choices
Question 2
(a)
Explain function of following 8085 pins
1)READY
2)HLDA
3)X1 & X2
3 Marks
(b)
Draw timing diagram of instruction MOV A , B
4 Marks
(c)
Explain flag register of 8085 Microprocessor with diagram
7 Marks
OR OPTION
(c)
Draw and explain architecture of 8085 Microprocessor
7 Marks
Question 3
(a)
Explain function of given instructions :
1)DAD
2)LHLD
3)XCHG
3 Marks
(b)
Explain indirect addressing mode in 8085 with examples
4 Marks
(c)
Write an assembly language program to find smallest number from numbers stored at memory location 1000H and 1001H. Store result on memory location 2000H
7 Marks
OR OPTION
(a)
Explain function of given instructions :
1)ANI
2)RLC
3)SIM
3 Marks
(b)
Explain registor addressing mode in 8085 with examples
4 Marks
(c)
Write a set of 8085 assembly language instructions to generate a 1 second delay, if the crystal frequency is 1 MHz.
7 Marks
Question 4
(a)
Define
1)Stack
2)Counter
3)Time Delay
3 Marks
(b)
Explain subroutine in 8085 Microprocessor with example
4 Marks
(c)
Draw and explain input and output handshake mode of 8255A
7 Marks
OR OPTION
(a)
Differentiate maskable and non-maskable interrupts in 8085 Microprocessor
3 Marks
(b)
Explain control registor in 8255A with diagram
4 Marks
(c)
Explain Programmable Interrupt Controller 8259A
7 Marks
Question 5
(a)
Describe operating modes in 8086 Microprocessor
3 Marks
(b)
Explain segment registers in 8086 Microprocessor
4 Marks
(c)
Draw and explain architecture of 80286 Microprocessor
7 Marks
OR OPTION
(a)
Differentiate GDT and LDT in 80286 Microprocessor
3 Marks
(b)
Explain registor organization in 80386 Microprocessor
4 Marks
(c)
Draw and explain pin diagram of 8086 Microprocessor
7 Marks
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About this Examination Paper & Attribution
Official Gujarat Technological University (GTU) examination paper and step-by-step solutions for Microprocessor and Interfacing (MPI) (Summer 2025, B.E. · Computer Engineering, Sem 6). Features complete 70-mark regular & remedial examination pattern, official marking distribution across all 5 questions, and direct 1-click official PDF download.
Transcribed for student exam preparation from Gujarat Technological University official examination archives. Questions, syllabus guidelines, and curriculum marking schemes remain the intellectual property of Gujarat Technological University.