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Microprocessors and Interfacing
  • Online Study
  • Electronics and Communication Engineering
  • Microprocessors and Interfacing

The 8085 Processor
  • Introduction to micro computer and microprocessor
  • Evolution of Microprocessors.
  • 8085 Microprocessor-Features.
  • 8085 Architecture
  • 8085-Arithmetic and logic unit (ALU)
  • 8085- Register Organization
  • 8085- Register Organization- Special purpose registers
  • 8085 Remaining blocks of microprocessor block diagram:
  • 8085 Interrupts:
  • 8085- Timing and control Unit:
  • 8085- Address, Data and Control Buses:
  • 8085- Pin configuration
  • 8085-Timing Diagram:
  • 8085- Timing Diagram- Opcode fetch Machine cycle::
  • 8085- Timing Diagram- Memory Read cycle
  • 8085- Timing Diagram- Memory Write cycle
  • 8085- Timing Diagram- I/O Read cycle
  • 8085- Instruction cycle, Machine cycle, fetch and execute cycles
  • 8085- Addressing modes
  • 8085- Addressing modes
  • 8085- Instruction and data formats:
  • Classification of instructions
  • 8085- Branch Instructions
  • 8085- Machine control and I/O Instructions
  • 8085- DATA TRANSFER INSTRUCTIONS
  • 8085- ARITHMETIC INSTRUCTIONS
  • 8085- Branching instructions
  • 8085- Logical instructions
  • 8085- Control instructions
  • 8085- Stack
  • 8085- Stack operation
  • 8085-Programming Example FOR PUSH & POP
  • 8085-Subroutine:
  • 8085-Diagrammatic representation Subroutine:
  • 8085-software Interrupt
  • 8085-HARDWARE INTERRUPTS
  • 8085-Vectored and Non-vectored Interrupts
  • 8085-Maskable & Non-Maskable Inetrrupts
  • Interrupt driven data transfer scheme
  • Delay routine
  • Example delay routine Introduction:
  • I/O mapped I/O and memory mapped I/O
  • Assembly language programming examples- Addition of two 8-bit numbers whose sum is 8-bits.
  • Assembly language programming examples- Addition of two 8-bit numbers whose sum is 16 bits.
  • Assembly language programming examples-Decimal addition of two 8-bit numbers whose sum is 16 bits.
  • Assembly language programming examples- Addition of two 16-bit numbers whose sum is 16 bits or more.
  • Assembly language programming examples- Subtraction of two 8-bit Decimal numbers..
  • Assembly language programming examples- Subtraction of two 16 –bit numbers.
  • Assembly language programming examples-Multiplication of two 8-bit numbers. Product is 16-bits.
  • Assembly language programming examples- Division of a 16- bit number by a 8-bit number.
  • Assembly language programming examples-To find the largest number in a data array
  • Assembly language programming examples-To find the smallest number in a data array.
8086 Microprocessor
  • 8086 Microprocessor Features.
  • 8086-Internal Architecture.
  • 8086-Bus Interface unit and Execution unit
  • 8086-REGISTER ORGANISATION
  • 8086-General purpose registers and Index/Pointer register
  • 8086-Segment Registers and Instruction Pointer Register :
  • 8086-Flag Register::
  • 8086-PIN-DESCRIPTION
  • 8086- Addressing modes :
  • 8086-Memory organization:
  • 8086-Reserved Memory Locations
  • 8086-Interrupts-Hardware Interrupts
  • 8086-Software Interrupt
  • 8086- Maximum Mode
  • 8086-MINIMUM MODE
  • 8086- Minimum mode interface
  • 8086-BUS OPERATION
  • 8086-Read/Modify/Write (semaphore) operations via Lock and External Synchronization via Test:
  • 8086-Basic System Timing
  • 8086- ASSEMBLER DIRECTIVES:
  • 8086- ASSEMBLY LANGUAGE DEVELOPMENT TOOLS
  • 8086-Segmentation
  • 8086-INSTRUCTION SET OF 8086-Data transfer instructions
  • 8086-INSTRUCTION SET OF 8086-Arithmetic instructions
  • 8086-INSTRUCTION SET OF 8086-Bit Manipulation instructions
  • 8086-INSTRUCTION SET OF 8086- String and Program Execution Transfer instructions:
  • 8086-INSTRUCTION SET OF 8086- Iteration control, Interrupt, High level and Processor control language interface instructions
  • Differences between CALL and INT
  • Arithmetic Instructions Illustration- The Addition Instructions: ADD and ADC,
  • Arithmetic Instructions Illustration- The Addition Instructions: INC and XADD Instruction
  • Arithmetic Instructions Illustration- The Addition Instructions: The AAA and DAA Instructions
  • Arithmetic Instructions Illustration- The Subtraction Instructions: SUB, SBB, DEC, AAS, and DAS
  • 8086-CMP Instruction
  • 8086-CMPXCHG, and CMPXCHG8B Instructions
  • 8086- The NEG Instruction
  • 8086- Instructions and their meanings
  • 8086- Absolute Addresses Calculation:
  • 8086- Instruction Format:
Interfacing Device-8255
  • I/O interface
  • PPI - Programmable Peripheral Interface
  • 8255 PPI -Pin Description.
  • 8255 PPI -Basic Operation.
  • 8255A Control Words
  • Modes of operation of 8255
  • 8255 I/O MODE-Mode 0
  • 8255 I/O MODE-Mode 1:
  • 8255 MODE 1: Input Control Signals:
  • Strobed Input Operation (Mode 1) of 8255A-Port A
  • Strobed Input Operation (Mode 1) of 8255A-Port B
  • 8255 MODE 1: Output Control Signals:
  • Strobed Output Operation of 8255A (Mode 1)- Port A:
  • Strobed Output Operation of 8255A (Mode 1)- Port B:
  • 8255A Status Word Format for Mode 1 Input and Output
  • BSR MODE
  • Mode 2 ( Strobed bidirectional I/O )
  • Control signal definitions in mode 2:
  • 8255 PPI -Basic Operation-(RESET), Group A and Group B Controls
  • 8255 PPI -Ports A, B, and C.
  • Interrupt Control Functions
  • Mode 0 Configuration
  • Interfacing of 8255 with 8085 processor
  • Mode 0 Timing Parameters
  • Mode 1Timing Parameters:
  • Mode 2 Timing Parameters
Dma
  • Introduction to Direct memory Access(DMA).
  • Basic DMA operation
  • 8237 Programmable DMA controller-Pin description
  • 8237 Programmable DMA controller-Functional description
  • 8237 Programmable DMA controller-Internal Registers
  • 8237 Programmable DMA controller-Channel I/O Port Addresses.
  • 8237 Programmable DMA controller-Transfer Timing
  • DMA operation.
  • DMA operation- IDLE CYCLE.
  • DMA Operational Modes and Settings.
  • DMA- Memory-to-Memory Transfer and Autoinitialize
  • DMA-Priority
  • DMA- Software Command Codes
  • DMA- 8088 system
  • DMA-Word Count and Address Register Command Codes
  • DMA-Programming the 8237
Interrupt And Timer
  • Programmable Interrupt Controller 8259A- Pin Description
  • Programmable Interrupt Controller 8259A- Block diagram description
  • Interrupts in Microcomputer Systems
  • Programming the 8259a
  • Initialization command words (ICWS)
  • Initialization Command Word 3 (ICW3)
  • Initialization Command Word 4 (ICW4)
  • Operation command words (OCWS)
  • Operation Control Word 1 (OCW1 )
  • Operation Control Word 2 (OCW2)
  • Operation Control Word 3 (OCW3)
  • Fully Nested Mode and End of Interrupt (EOI) and Automatic End of Interrupt (AEOI) Mode
  • Automatic Rotation(Equal Priority Devices) and Specific Rotation (Specific Priority)