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What is USB?
Universal Serial Bus is a high speed connectivity standard enabling simple plug and play connections to devices such as modems, digital cameras, camcorders, keyboards and mice.
The standard is being supported by many leading suppliers of computers and peripherals. An attractive advantage of USB is that the devices are hot pluggable (live connection / disconnection without data loss or interruption).
Devices manufactured to the current USB Revision 2.0 specification are backward compatibility with version 1.1. There is a newly revised edition which is USB Revision 3.0, which have a transfer mode of 5.0Gbit/s.
The USB specification requires a host system to be equipped with an A type jack (see connectors section for more). The B type jack (see connectors section for more) is typically found on peripherals devices requiring detachable cables. Therefore, detachable USB cables are configured as A to B male combination, preventing improper bus configurations and topology miswiring.
Connectors:
USB Cable Construction:
Topology:
USB is a serial, bi-directional bus that can be layered in tiers or star shaped with the use of a hub. USB does not require terminators on manual addressing.
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