Introduction

Introduction

1. Microcomputer

   • Processor
     • Microprocessor
       • Small processor
   • Memory
     • ROM
       • Storing software and fixed constant data
       • EEPROM
         • Electrically-erasable programmable ROM
       • Non-volatile
         • Data retained
     • RAM
       • Storing temporary information
       • Volatile
         • Data lost when power turns off
       • SRAM
         • Static RAM
   • I/O
     • Exchange data with real world
     • Interfaces
       • Parallel
       • Serial
       • Analog
       • Time
     • Ports
       • Collection of pins
       • Physical connection between computer and outside world
     • Device driver
       • Set of software functions that facilitate the use of an I/O port
     • Bus
       • Collection of wires used to pass information between modules
   • Small computer

2. Microcontroller

   • Incorporates processor, memory and I/O on a single chip

3. Embedded System

   • Microcomputer with mechanical/chemical/electrical devices attached to it
   • Most run in real time
     • Inference latency
       • Worst case response time between input and processing
     • Periodic tasks
   • Dedicated purpose
   • Reliable
   • Low cost, power, size and weight
   • Packaged as complete system

4. Computer

   • Von Neumann

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