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Seat No.: Enrolment
GUJARAT TECHNOLOGICAL UNIVERSITY
PDDC SEMESTER-IV EXAMINATION WINTER 2018
Subject Code:X40901 Date: 17/11/2018
Subject Name: Microprocessor Interfacing
Time: 02:30 PM TO 05:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1

Draw and Explain the internal architecture of 8085 Microprocessor.
07

Give Brief note on Bus structure of 8085. How Control Signals are generated?
07
Q.2

List out the general purpose register available in 8085. Explain the flag register and flag bits of 8085 microprocessor.
07

Compare Memory mapped I/O and Peripheral I/O.
07
OR

Describe basic Machine Cycle used in 8085. Draw Timing Diagram for OUT instruction.
07
Q.3

Explain following Pin Functions of 8085 microprocessor. ALE READY
HLDA INTR RESET OUT (6)TRAP (7)SID
07

Broadly classify the interrupts in 8085 microprocessor.
07
OR
Q.3

Define addressing modes? List out the various addressing modes supported by 8085 microprocessor give examples of each addressing modes.
07

Draw and explain the functional block diagram of 8237 DMA Controller.
07
Q.4

Explain the Timing Diagram of Memory Write Cycle.
07

What are the advantages of Assembly language in comparison with High level languages?
07
OR
Q.4

Write a short note on Memory Classification of 8085 Microprocessor.
07

Discuss serial communication protocols in detail.
07
Q.5

Draw and explain the functional block diagram of 8253 timer IC.
07

Explain PUSH and POP instructions.
Explain RIM and SIM Instructions.
07
OR
Q.5

Draw and explain block diagram of 8255 with control word format.
07

Draw and explain the functional block diagram of interrupt controller IC 8259A.
07