InputOutput

1
Input/Output

• Chapter 13,
• Exploring the Digital Domain

2
Input and Output
In this chapter you will learn about...

• the assortment of devices used for input and
  output
• some of the choices for connecting I/O devices to
  your computer system

3
Input Devices

• keyboard
• mouse
• scanners (flatbed, slide, and drum)
• digital cameras
• sound card
• MIDI (Musical Instrument Digital Interface)
• video capture card

4
Output Peripherals

• video display monitors
• monochrome and color
• CRT
• flat-panel displays

5
CRT technology

• cathode ray tube (CRT)
• phosphors excited by electron gun beams
• RGB composite color
• horizontal scanning pattern to refresh phosphors

6
Video Display Resolution

• EGA (extended graphics adapter)
• 640 X 350
• VGA (video graphics adapter)
• 640 X 480
• SVGA (super VGA)
• 800 X 600
• SXGA (super extended graphics array
• 1024 X 768
• UXGA (ultra-extended graphics array
• 1600 X 1200

7
Flat-Panel Displays

• LCD (liquid crystal displays)
• active matrix (TFT)
• passive matrix
• other technologies
• plasma, SED, etc.

8
Output Peripherals

• video display monitors
• CRT and flat panel displays
• printers
• character, line, and page

9
Printers

• CHARACTER
• dot matrix
• low-cost, text and graphic printers
• slow-speed, low quality
• inkjet
• medium-priced
• general-purpose

• PAGE
• laser printers
• high-quality
• assortment of sizes, performance, and cost

10
Output Peripherals

• video display monitors
• monochrome and color
• CRT and LCD
• printers
• character, line, and page
• sound and voice output
• MIDI synthesizers

11
Connecting Peripheral

• internal vs. external
• serial vs. parallel

12
Internal Bus Types

• parallel communications
• IDE (Integrated Drive Electronics)
• Hard drives, CD-ROM
• 16-bit parallel
• PCI (Peripheral Component Interconnection)
• network interface cards, video graphic adapters,
  etc.
• 32 or 64 bit parallel

13
Internal Bus Types, contd.

• PCMCIA (Personal Computer Memory Card
  International Association)
• laptop expansion cards
• 16 bits parallel
• newer CardBus supports 32 bits
• SCSI (Small Computer System Interface)
• several generations

14
External Serial Bus Types

• RS-232
• PS/2 mouse and keyboard
• USB
• Firewire

15
Universal Serial Bus

• up to 6 Mbps 2.0 -- 480 Mbps!
• two types of connectors
• A-- upstream connections (to computer)
• B -- downstream connections (to device)
• hub
• provides multiple connections
• hot-swappable

16
Firewire (IEEE 1394)

• data rates at 100, 200, and 400 Mbps
• self-configuring, hot-swappable
• new standard -- 800 Mbps
• common in consumer electronics