Universal Serial Bus

(redirected from USB 1.0)
Also found in: Dictionary, Medical.

universal serial bus

[‚yü·nə‚vər·səl ‚sir·ē·əl ′bəs]
(computer science)
A serial interface that can transfer data at up to 480 million bits per second and connect up to 127 daisy-chained peripheral devices. Abbreviated USB.

Universal Serial Bus

(hardware, standard)
(USB) An external peripheral interface standard for communication between a computer and external peripherals over an inexpensive cable using biserial transmission.

USB is intended to replace existing serial ports, parallel ports, keyboard, and monitor connectors and be used with keyboards, mice, monitors, printers, and possibly some low-speed scanners and removable hard drives. For faster devices existing IDE, SCSI, or emerging FC-AL or FireWire interfaces can be used.

USB works at 12 Mbps with specific consideration for low cost peripherals. It supports up to 127 devices and both isochronous and asynchronous data transfers. Cables can be up to five metres long and it includes built-in power distribution for low power devices. It supports daisy chaining through a tiered star multidrop topology. A USB cable has a rectangular "Type A" plug at the computer end and a square "Type B" plug at the peripheral end.

Before March 1996 Intel started to integrate the necessary logic into PC chip sets and encourage other manufacturers to do likewise. It was widely available by 1997. Later versions of Windows 95 included support for it. It was standard on Macintosh computers in 1999.

The USB 2.0 specification was released in 2000 to allow USB to compete with Firewire etc. USB 2.0 is backward compatible with USB 1.1 but works at 480 Mbps.

usb.org.
References in periodicals archive ?
Maximum wireless signal rate derived from Certified Wireless USB 1.
3u 10/100Mb Dual Speed Ethernet Adapter with USB 1.
0 was revised sharply upwards a range of between 360 and 480 Mbps - which would make the new version between 30 and 40 times faster than USB 1.
This might be a huge plus for it, as computer manufacture's could begin replacing USB 1.
According to Terry Moore, CEO of MCCI, "SuperSpeed USB places demands on hardware and software that weren't envisioned twelve years ago when USB 1.
Finally, the Notebook USB Audio Station contains a 3-port powered USB hub for use with all USB 1.
Advanced peripheral capability supports PS2, full duplex stereo audio, serial (RS-232), USB 1.
Certified by the USB Implementers Forum (USB-IF), the uPD720171 controller conforms to the Wireless USB 1.