Chapter 6 - Input/Output

Chapter 6 - Input/Output

1. Universal Serial Bus(USB)

   • USB 1.0
   • USB 2.0
   • USB 3.0
   • USB 3.1

2. Fire Wire Serial Bus

   • IEEE Standard 1394

3. External Devices

   • Human readable
   • Machine readable
   • Communication

4. Major Function

   • Control and timing
   • Processor Communication
   • Device Communication
   • Data Communication
   • Data buffering
   • Error detection

5. Keyboard/Monitor

   • Character
     • Printable
       • Alphabetic
       • Numeric
       • Special characters
     • Control
       • Controlling printing
       • Displaying characters
       • Control characters

6. Programmed I/O

   • Programmed I/O
   • Interrupt-Driven I/O
   • Direct Memory Access

7. I/O Commands

   • Control
   • Test
   • Read
   • Write

8. I/O Mapping Summary

   • Memory mapped I/O
   • Isolated I/O

9. Device Identification

   • Multiple interrupt lines
   • Software poll
   • Daisy Chain(hardware poll, Vectored)
   • Bus arbitration

10. Drawback of Programmed and Interrupt-Driven I/O

    • I/O transfer rate is limited
    • Processor is tied up in managing an I/O transfer.