This document discusses various legacy and modern ports and connectors used in computing. It describes serial and parallel ports, video ports like VGA, DVI and DisplayPort, audio ports including 3.5mm mini jacks and S/PDIF, networking ports like RJ45, and modern ports including USB, FireWire and SCSI. It provides details on the specifications of different port standards like maximum speeds, cable lengths and pin configurations.

1. Chapter 2 : Ports and
Connectors

2. Legacy Multifunction Ports
 Serial/Parralel
 Male /female
 Pins/sockets respectively
 Slight D shape
 D-sub/D-subminiature connector/DB
D-subminiature
connectors referred to
as D-shell connectors

3. Legacy Multifunction Ports
Serial Ports
 9pin / 25 pin variety

 Max transmission 115kbps
 Standard for ports in use is 9600bps
 Serial port 1
 Default i/o address : 3f8 / irq4(Com1)
 Serial port 2
 Default i/o addres: 2f8/ IRQ3(Com2)
Parallel Ports
 25-pin
 Female

 Printers use centronics ports

 Varieties: (1) 36 pin IEEE 1284B (2) mini ieee1284c
connector
 i/o address 378 / irq7(lpt1)
 Extended Capability port (ecp)/ enhanced
parallel port(epp)
 Ten times faster than standard portsa

4. Standard Single- Function Ports
 Keyboard port
 6 pin mini din (ps/2 port)
 Mouse port
 Appears identical to keyboard port NOT interchangeable
 Video Ports
 VGA – Video Graphics array
 Analog (modulated data freq. wave)
 DVI – Digital Visual Interface
 analog/digital (sends video through 01s)
 DisplayPort
 Pure digital
15 pin D-sub for
CRT/LCD/project
ors

5. Monitors and their connections
 Lcd and projectors use DVI connector
 Made of 3:
 Dvi-dd – digital / 18 pins
 Dvi-a – for analog (backwards comp. if desired)
 Dvi-a/d or dvi-i(interchangeable) accepts dvi-d or a
 Dvi-I and D support dual-link dvi
 Uses 24pin connector
 Supports higher resolution and similar connector (more pins)

6. Continuation
 Display Port
 Compact 10 pin connector
 Smaller display port
 Direct-drive display technology
 Monitors do not need special scaling
 Resolutions up to 120hz
 Optionally capable of encryption and transmission of audio

7. Continuation
 Audio ports
 3.5 mm mini audio connectors
 With high performance sounds cars
 outputs incorp two connections called sony/phillips digital interface (s/pdif)
 Flavors: electrical (2) optical
 Electrical
 Rca connector on coaxial cable
 Optical port
 Uses fiber connector

8. An Extension on Ports
 Hdmi
 High definition video signal
 Multichannel digital audio streams
 Purely digital
 Midi/joystick ports
 Female db -15 port for gaming controls
 Pins in two arrays
 Modem ports
 Two0wire RJ-11 telephone cables
 Network Interface Ports
 NICS ( network interface cables)
 Eight wire RJ-45 port
RJ-45
RJ-11
Know the
Difference
15 pin db connector can be
used for midi and joystick
Very old nics may
have bayonet-style
coax connectorS
called BNC .
10BASE2/THINNET
NETWORKING

9. Modern Multifuntion Ports
usb
 Newer systems all have
 SCSI- small computer system interface
 Usb
 Firewire (1394
 Hot swappable
 Can connect / disconnect at any time w/o
powering down pc

USB Standards
Name Standard Max speed Cable length
Low speed usb 1.1 1.5Mbps 3meters
Full speed Usb 1.1. 12mbps 3meters
Hi speed Usb 2.0 480mbps 5meters
superSpeed Usb 3.0 5gbps 3meters

10. continuation
Firewire
 Otherwise known as IEEE 1394a
 Transfer up to 400mbps
 6 pin standard
 Current generation b
 Up to 800mbps
 9 pin
 Mini fire wire
 4 pin
 Can connect up to 63 FireWire devices in
daisy chain
SCSI
 Variety of interfaces
 Scsi -1
 SCSI -2
 ULTRA SCSI
 WIDE ULTRA SCSI
 FEMALE ULTRA 320 PORT
 68 pins
 50 pin / 25 pin on older devices
 Varies from 5-80mbps (old) 32-mps for newer