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Subject Title: 8085 Microprocessor and Applications Prepared by: Ms E Gayathri
Year: lll Semester: V Updated on: 22.03.
Unit - I: Introduction to 8085 Microprocessor and its Architecture
- What is Microprocessor? Give the power supply and clock frequency of 8085
- What are the functions of an accumulator?
- List the 16 bit registers of 8085 microprocessor.
- List the few applications of microprocessor based system.
- What is interrupt? What are hardware and software interrupts?
- What are Vectored and non vectored interrupts?
- What is the need for the timing diagram?
- Define: i) Instruction cycle i) Machine cycle i) T-State
- Explain the difference between a JMP instruction and CALL instruction.
- What is memory mapping?
- Compare memory mapped I/O and peripheral mapped I/O.
- What is the signal classification of 8085?
- Describe the functional block diagram of 8085.
- Describe the functional pin diagram of 8085.
- Explain the 8085 interrupt system in detail.
- Discuss the different memory mapping schemes.
- Explain various machine cycles supported by 8085.
- Give the list of microprocessor initiated operation.
- Draw and explain the timing diagram of Memory read cycle.
- Draw and explain the timing diagram of Memory write cycle with example.
- Explain the difference between a JMP instruction and CALL instruction.
- Draw and explain the timing diagram of Op-code fetch cycle.
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Unit - II: Instruction set of 8085 Microprocessor
- What is op-code? What is an instruction?
- Define stack. What is subroutine?
- Compare CALL and PUSH instructions.
- What is the use of addressing modes?
- Explain LDA, STA and DAA instructions.
- Write the contents of flag register and accumulator on execution of the program segment.
MVI A,55H
XRA A
HLT - Explain the instruction MOV A, B with the help of a timing diagram.
- Discuss the various addressing modes of 8085 microprocessor with relevant examples.
- Describe in detail the instruction set of 8085 microprocessor with relevant examples.
- Explain the operation of stack in detail.
- Explain the concept of subroutine with an example.
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Unit - lll: Programming of 8085 microprocessor
- What is an Assembly language program?
- Write an assembly language program to perform decimal addition of two 8 bit numbers.
- Write an assembly language program to perform 8bit subtraction.
- Write an assembly language program to perform 8 bit multiplication.
- Write an assembly language program to perform 8 bit division.
- Write an assembly language program to perform 16 bit addition.
- Write an assembly language program to find the largest number in the given array.
- Write an assembly language Program to find smallest number in the given array.
- Write an assembly language program to sort the given numbers in ascending order.
- Write an assembly language program to sort the given numbers in descending order.
- Write an ALP to generate a accurate time delay of 100ms.
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Unit - IV: Interfacing of Peripherals
- What is interfacing? What is 8212?
- Explain the types of programming and non programmable interfacing peripherals.
- Mention the applications of stepper motor.
- What are A/D converters and D/A Converters?
- Define the parameters of A/D and D/A converters.
- Explain the control word format of 8255.
- Find the resolution of an 8 bit DAC with output voltage range of 0-2.5V.
- Explain the BSR mode of 8255 PPI.
- Write a control word for 8255 PPI to make port A as IN port, port B and C as OUT ports.
- What are closed and open loop process control systems.
- Find the resolution of 6 bit D/A converter with a full scale output of 10V.
- Explain the pin diagram of 8212.
- Discuss the different operating modes of 8255 PPI.
- Explain the working and interfacing of a stepper motor with 8085 microprocessor.
- Explain the different methods of A/D converters.
- Explain the principle and action of successive approximation A/D converters.
- Draw the block diagram of 8255 PPI and briefly explain different modes of operation.
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