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(computer science)



Officially the IEEE 1394 High Performance Serial Bus (HPSB), FireWire is a high-speed interface mostly developed and promoted by Apple for video transmission. Introduced in 2000, FireWire was added to camcorders and a variety of A/V equipment. Even early iPods could connect via FireWire. Still included on Mac laptop and desktop computers, modern camcorders have replaced FireWire with USB, HDMI and other video outputs.

FireWire 400 and 800
FireWire 400 is limited to a distance of 4.5 meters. In 2003, FireWire 800 increased the range to 100 meters and doubled the transfer rate. FireWire supports 63 devices, real-time data transfer, hot swapping and simultaneous multiple speeds. The faster 1600 and 3200 versions never got into production.


  FW400     400 Mbps

  1394b - 100 METER CABLE LENGTH

  FW800     800 Mbps
  FW1600   1600 Mbps
  FW3200   3200 Mbps

FireWire Sockets and Compatibility
FW800 is backward compatible with FW400. One end of a "bilingual cable" has an FW800 plug, while the other end is FW400. Sony's i.Link is a miniaturized socket that connects to cables with i.Link, FW400 or FW800 at the other end.

Easy to Tell
FireWire cables are easily distinguished from their USB counterparts.

Dual Mode FW/USB
This external hard drive can connect to the computer via FireWire or USB, whichever cable is plugged in.
References in periodicals archive ?
0 3D graphics processing -- High quality video scaling and motion-compensated de-interlacing -- Video digital to analog converters (DACs) -- High-fidelity audio DACs (dual-stereo for BCM7420; stereo for BCM7410) -- Suite of peripherals provides a variety of STB control functions -- Programmable security processor and transport engine -- Integrated 1394a controller.
The 5035B-T+ is based on Supermicro's C2SBX motherboard, which supports Intel(R) Core(TM) 2 Extreme, Quad, and Duo processors, 8-channel high-definition audio, and features two IEEE 1394a headers along with two PCI-X slots that provide great connectivity to digital media and outstanding I/O bandwidth.
Due to the functionality of the IEEE 1394a FireWire library, capturing of the images with an asynchronous command is possible.
The IEEE 1394a standard was developed for use with digital video and other demanding applications arising from the convergence of computers and consumer products.
Agere Systems Inc has unveiled a reference design that provides 1394a and Universal Serial Bus (USB) host functionality on a single PCI (Peripheral Component Interconnect) add-in card.
0/eSata combo ports, both HDMI and VGA ports, a IEEE 1394a port, an Ethernet port and two legacy RS-232 serial ports.
IEEE 1394a (one front, one rear),Serial,parallel, PS/2,RJ-45, ESATA port on
1 audio with S/PDIF outputs, and two IEEE 1394a headers.
1 ports (4 rear connectors & 2 headers) -- 2 x PS/2 for mouse and keyboard connectors -- Two FireWire (IEEE 1394a) ports (one rear connector and one internal connector) - TI TSB43AB22 IEEE 1394a PCI controller -- Optional FireWire 800 IEEE-1394b
Connectivity for networking and additional storage is facilitated through an integrated 1GigE LAN connection, 2 FireWire 1394A ports & 2 USB 2.
The consumer video market continues to drive demand for content protection-enabled 1394a devices in the high-definition set-top box (STB) and digital TV segments, while the PC and external storage market continue the transition from 1394a to 1394b.