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UNIVERSAL SERIAL BUS (USB) By Aaron Specht
UNIVERSAL SERIAL BUS(USB)
By Aaron Specht
History When:
In 1995-96 Compaq, Digital Equipment Corporation (DEC), IBM, Intel, Microsoft and NEC, joined later by Hewlett-Packard, Lucent and, Philips got together and designed the USB
History Why?
The USB was created out of a need for universal communication between devices.
The problem with that was that computer designers were literally running out of room
Before the USB every new computer device needed a different serial port.
Advantages
Cost effective Power efficient Universal design
One fits all Resistant to scratches
and Dust Convenience Size
USB Flash Drive
Disadvantages
Size Being to small leaves
some devices to be easily misplaced
It breaks its gone Compared to some CD’s
that can be repaired once scratched to retrieve data USB’s once they fail they fail.
How it Works. Enumeration
the computer would decided which kind of data the device uses Interrupt - low data transfer - keyboard or
mouse Bulk - large amounts of data - printer or
external hard drive Isochronous - streamed data - microphones
or speakers
Encoding
the process of recoding or modifying information into a desired format or pattern
is when the two devices communicate and configure to which form of data transmission should be used
Transmission
Convey information from the device to another location.
Can be as simple as typing a few keys on the keyboard or transferring large amounts of data like pictures, music and the like
Receiving
Recognizes and accepts information from transition and collects the inputs and readies them for storage
This would be where the typed keys would be displayed onto the screen or stored in a word document.
Versatility
Toys Camera’s Phones Speakers
USB can be incorporated into just about anything.
Versatility
Instruments Microphones Lights Cooling fans
Evolution
USB 1.0 – 1.1 Maximum transfer rate of 12 mbps First appeared on market in 1995 and 1998
Evolution
Hi-Speed USB or USB 2.0 released with speeds of 480 mbps. Released in 2000
Evolution
Super-Speed USB or USB 3.0 predicted speeds of 5 gbps Soon to be released.
Future
Wireless USB connections you will have the same personal
security of wired USB 2.0
Sources
USB Today. Intel, retrieved March 11, 2010, from http://www.intel.com/technology/usb/
About Us, USB-IF, retrieved March 11, 2010, from http://www.usb.org/about
USB Flash Drive. Wikipedia, retrieved 17, 2010 http://en.wikipedia.org/wiki/USB_flash_drive
Usblyzer. http://www.usblyzer.com/brief-usb-overview-and-history.htm
Super Speed. Ars technical, retrieved March 11, 2010, http://arstechnica.com/hardware/guides/2009/08/super-speed-a-brief-history-of-usb-30.ars
The USB Process. How Stuff Works, retrieved April 2, 2010, http://computer.howstuffworks.com/usb3.htm
USB Games. Shocking Fun, retrieved March 10, 2010 http://www.shockingfun.com/category_s/210.htm
Akaipro. Retrieved March 10, 2010 http://www.akaipro.com/ewiusb
