CHAPTER Microcomputer as a Communication Device

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CHAPTER Microcomputer as a Communication Device
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Chapter Objectives

• Examine the components of the motherboard that
  relate to communication
• Describe a few communication links involving the
  microcomputer
• Discuss the Port Settings and Port Resources
• Outline the procedure for installing and
  configuring a multi-port interface card

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Chapter Modules

• Overview of Communication Components of a
  Microcomputer
• Communication Ports
• Communication Device Interface
• Communication Port Configuration

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END OF CHAPTER INTRODUCTION
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MODULE

• Overview of Communication Components of a
  Microcomputer

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Communication Components Of a Micro
Firewire Bus Port
USB Bus Port
Built-in port connection.
Expansion Bus
Expansion Bus
Serial Port
Parallel Port
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Port and a Bus

• Port is used for connecting only one device
• Serial port, parallel port etc.
• A bus can be used for connecting multiple devices
• PCI, USB, SCSI etc.

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Motherboard (Main Board)
Built-in serial and parallel port connection.
ISA expansion slots.
PCI expansion slots.
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Devices Connected to Communication Port or
Expansion Bus

• Modem
• ISDN adapter
• LAN cards
• Terminal emulation cards
• Etc.

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Older Expansion Bus Technologies

• ISA (Industry Standard Association )
• EISA (Extended Industry Standard Association)
• MCA (Micro Channel Architecture)
• VESA (Video Electronic Standards Association)

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PCI Newer Expansion Bus Technology

• PCI (Peripheral Component Interconnect)
• Developed by Intel
• Found in most Intel based microcomputers
• Supports plug-and-play
• Continuously being improved by releasing new chip
  sets

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PCI Technology

• PCI
• Older versions are slower than AGP
• PCI 2.0
• PCI Express
• Generally faster than AGP

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Expansion Bus Width

• 8, 16, 32 and 64 bits wide
• 16-bit is common with ISA technology
• 32-bit is the norm with PCI technology
• PCI technology also supports 64-bit bus
• Most PCs have a combination of 16-bit and 32-bit
  buses
• 16-bit ISA slots and 32-bit PCI slots

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PCI Bus Speed

• Older PCI buses operated at 33 MHz
• Newer PCI buses operate at speeds of 66 MHz, 100
  MHz and 133 MHz

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Sample Expansion Bus Configurations

• Four 32-bit PCI slots and four 16-bit ISA slots
  now outdated
• PCI 32-bit 33 MHz
• Evolving PCI 32 100 MHz or faster
• Advanced microcomputers such as those specially
  intended to function as fast network servers
  incorporate 64-bit PCI slots

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Sample Expansion Bus Configurations Past an
Future

• Past
• Three 32-bit EISA slots and five 16-bit ISA slots
• Two 32-bit VESA slots, five 16-bit ISA slots and
  one 8-bit ISA slot
• Current
• 32-bit and 64-bit PCI slots
• PCI Express technology or higher
• Faster bus speeds in MHz..

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PCI Bus Technology

• PCI 1.0
• PCI 2.0
• PCI Express
• PCI X1, X2, X4, X8 and X16

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In Summary

• Expansion bus technology plays an important role
  with respect to the performance of the devices
  attached
• Important in the case of a network interfere card
• Not as critical in the case of a low speed device
  such as a modem

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END OF MODULE
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MODULE

• Communication Ports

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Communication Ports

• Serial port
• The older RS-232 standard
• The newer USB standard
• IEEE 1394 FireWire
• Parallel port
• IEEE 488 standard
• Enhanced by ECP and EPP
• Additional details can be found in modules
  entitled serial and parallel communications

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Com and LPT Ports on a Computer
Port Holders
Com1
Com2
LPT1
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Ports on the Back of a Computer
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Combo Ports on an NIC
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NIC Connection
NIC
Twisted Pair Cable
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Newer Communication Ports

• USB 2.0
• Firewire

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Disadvantages of Legacy Ports

• Each port requires a set or resources
• Each port can be connected to only one device
• In the case of newer ports, only one set of
  resources are needed per USB hub
• Several devices can be connected to the hub

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END OF MODULE
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END OF MODULE END OF CHAPTER