Identification And Function

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Presentation transcript:

Identification And Function Input/Output Ports Identification And Function

Device Connection All devices that connect outside of the computer must use a port to connect Known as I/O ports (Input/Output) Bits can travel in parallel or in serial

Serial Connectors Can use a 9 or 25 pin male sub-D connector Slowest ports Used for: Mice Keyboards Modems

Serial Ports Also called COM1, COM2, COM3, and COM4 Can be referred to as a RS-232 port This is a standard that defines serial communication

Parallel Ports Uses a 25 pin female sub-D connector Data flows over 8 lines Used for: Printers Scanners Portable drives

Parallel Ports When used to connect to a printer, it uses a 36 pin centronics connector at the other end

Parallel Ports Also called LPT1, LPT2, LPT3 Bi-directional communication Called Enhanced Printer Port (EPP) Transmission mode can be set in the BIOS Maximum cable length is 15 feet

PS/2 and Keyboard Connectors PS/2 connectors are used for both mice and keyboard Also called 6-pin mini DIN Green for mouse Purple for keyboard Not interchangeable Standard for ATX boards

DIN-5 Keyboard Connector Older motherboards use a DIN-5 connector for the keyboard and a 9 pin serial connection for the mouse

Universal Serial Bus (USB) Used to connect almost all peripherals Can connect up to 127 devices Designed to be hot-swappable Designed to connect in a daisy chain

USB Standards USB 1.1 – 12 Mbps USB 2.0 – 480 Mbps A-Style connector is used on the computer or hub B-Style connector is used on the device Must have Windows 98, 2000 or XP Not supported in Windows 95 or NT 4.0

USB Cable Lengths Hi Powered devices – 5 meters max Also called hi-speed Low Powered devices – 3 meters max Also called low-speed Can be extended if you use a self-powered hub

FireWire Also called IEEE-1394 Used for digital cameras, camcorders, and scanners Bi-directional communication Developed by Apple Computers Requires a special adapter card

FireWire Cable Length 4.5 meters max length Hot-swappable Transfer rate of 400 Mbps Supports 63 devices in a daisy chain