Visual
Course overview
This course covers microprocessor fundamentals starting with 8085 architecture and progressing through the 8086, instruction sets, assembly language programming, and peripheral interfacing. The difficulty increases from register-level architecture in the first module to interrupt-driven I/O and memory-mapped interfacing in later modules. After completing the course, students can write and trace 8085 assembly programs, design interfacing circuits for standard peripherals, and solve GATE-level problems on microprocessor operation.
Details
Target audience: Third-year B.Tech ECE students studying Microprocessors and Microcontrollers as a core subject, or preparing for GATE EC.
Duration: 10 to 12 hours
Prerequisites
- Digital logic design: combinational and sequential circuits
- Basic computer organization concepts
- Number systems and binary arithmetic
Learning outcomes
- Trace the fetch-decode-execute cycle for a given 8085 instruction and identify bus signals
- Write 8085 assembly programs for arithmetic, sorting, and delay generation
- Design interfacing circuits for 8255, 8259, and memory chips using chip select logic
- Explain the 8085 interrupt priority structure and write interrupt service routines
- Identify the differences between 8085 and 8086 memory and I/O addressing
- Solve GATE-level numerical problems on instruction execution time and I/O port addressing
Modules
Module 1: 8085 Architecture
Topics
- Internal architecture: registers, ALU, and control unit
- Pin diagram and signal descriptions
- Timing diagrams for fetch and execute cycles
- Memory and I/O addressing modes
- Bus demultiplexing using 8212 latch
Article slugs
8085-architecture-overview8085-pin-diagram8085-timing-diagrams8085-bus-demultiplexing
Lab slug: 8085-architecture-lab
Module 2: Instruction Set
Topics
- Data transfer instructions: MOV, MVI, LDA, STA
- Arithmetic and logic instructions
- Branch and jump instructions
- Stack operations and subroutine calls
- Addressing modes in 8085
Article slugs
8085-data-transfer-instructions8085-arithmetic-logic-instructions8085-branch-instructions8085-stack-subroutines
Lab slug: 8085-instruction-set-lab
Module 3: Assembly Programming
Topics
- Writing programs for addition, subtraction, and sorting
- BCD and ASCII arithmetic programs
- Delay loop design and timing calculation
- Multi-byte arithmetic operations
- Debugging and tracing execution flow
Article slugs
8085-assembly-programsbcd-ascii-arithmetic-80858085-delay-loopsmulti-byte-arithmetic-8085
Lab slug: 8085-programming-lab
Module 4: Interrupts and Interfacing
Topics
- 8085 interrupt structure: TRAP, RST, INTR
- 8259 programmable interrupt controller
- 8255 parallel interface and modes of operation
- 8251 USART for serial communication
- Memory interfacing and chip select logic
Article slugs
8085-interrupt-structure8259-interrupt-controller8255-parallel-interface8251-usart-interfacing
Lab slug: 8085-interfacing-lab
Module 5: 8086 and GATE Practice
Topics
- 8086 architecture and segmented memory model
- 8086 instruction set differences from 8085
- Protected vs real mode concepts
- GATE past paper problems on microprocessors
- Comparison of 8085 and 8086 for exam problems
Article slugs
8086-architecture-overview8086-segmented-memory8085-vs-8086-comparisongate-microprocessor-problems
Lab slug: 8086-programming-lab