chapter microcomputer as a communication device. chapter objectives examine the components of the...
TRANSCRIPT
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CHAPTER CHAPTER
Microcomputer as a Microcomputer as a Communication Communication
DeviceDevice
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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 END OF CHAPTER INTRODUCTIONINTRODUCTION
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MODULE
Overview of Communication Components of a Microcomputer
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Communication Components Of a Micro
Expansion Bus
ParallelPort
SerialPort
Built-in portconnection.
USB Bus Port
Firewire Bus Port
Expansion Bus
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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)
PCI expansionslots.
ISA expansionslots.
Built-in serial andparallel port connection.
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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 MODULEEND 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
Com2
Com1
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
Twisted PairCable
NIC
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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 MODULEEND OF MODULE
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END OF MODULE END OF MODULE
END OF CHAPTER END OF CHAPTER