CHAPTER Microcomputer as a Communication Device

1. CHAPTER Microcomputer as a Communication Device

2. 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

3. Chapter Modules • Overview of Communication Components of a Microcomputer • Communication Ports • Communication Device Interface • Communication Port Configuration

4. END OF CHAPTER INTRODUCTION

5. MODULE Overview of Communication Components of a Microcomputer

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

7. 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.

8. Motherboard (Main Board) Built-in serial and parallel port connection. ISA expansion slots. PCI expansion slots.

9. Devices Connected to Communication Port or Expansion Bus • Modem • ISDN adapter • LAN cards • Terminal emulation cards • Etc.

10. Older Expansion Bus Technologies • ISA (Industry Standard Association ) • EISA (Extended Industry Standard Association) • MCA (Micro Channel Architecture) • VESA (Video Electronic Standards Association)

11. 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

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

13. 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

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

15. Sample Expansion Bus Configurations • Four 32-bit PCI slots and four 16-bit ISA slots – now outdated • PCI 32-bit 33 MHz • Evolving PCI 32 100 MHz or faster • Advanced microcomputers such as those specially intended to function as fast network servers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

16. 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..

17. PCI Bus Technology • PCI 1.0 • PCI 2.0 • PCI Express • PCI X1, X2, X4, X8 and X16

18. 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

19. END OF MODULE

20. MODULE Communication Ports

21. 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

22. Com and LPT Ports on a Computer Port Holders Com1 Com2 LPT1

23. Ports on the Back of a Computer

24. Combo Ports on an NIC

25. NIC Connection NIC Twisted Pair Cable

26. Newer Communication Ports • USB 2.0 • Firewire

27. 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

28. END OF MODULE

29. END OF MODULE END OF CHAPTER