What are FireWire Ports?

The FireWire port is an AppleŽ original creation and is denoted by the Standard IEEE-1394 which preceded the USB port. Both ports (standards) were designed with the same goals.

Its original intention was for usage with devices requiring large data transfer/movement. Some of these devices were DVD players, digital audio equipment, etc.

Even though IEEE-1394 is faster than USB, they share certain similarities and also differ in certain ways. Let's itemize some of these similarites and differences:

• Both USB and IEEE-1394 use Serial Bus Standards and twisted-pair cabling to transfer data.

• USB has a transfer rate of approximately 12Mb/s compared to IEEE-1394 at up to 400Mb/s.

• Its technology makes it better suited for use in high-end applications such as digital video where it is important to move data extremely fast.

• 127 devices per bus can be handled by USB while only 63 devices can be handled by IEEE-1394.

• Both these standards support Isochronous devices - devices which require a certain amount of bandwidth for data streaming such as streaming audio and video.

• Both devices support 'hot swapping' - been able to plug and unplug devices at anytime without powering down device.

• FireWire's complexity causes it to be more expensive to implement than USB.

• To move video data from a videotape to a computer in real time you need to have a 'wide pipe' and FireWire was the perfect technology for this.

• This port is found on all digital camcorders and cameras where high throughput is a necessity.

• It far out-performs USB 2 and multiple devices can be directly connected to each other for extended distances without the use of a computer. This configuration is called peer-to-peer.

• USB devices are 'passive' and controlled by a single external host controller. FireWire devices on the other hand are 'active' each with its own embedded controller circuitry; hence its higher cost compared to USB 2.

If FireWire devices don't need a PC, then it should contain all the necessary circuitry required to control data movement.

The revised technology is now referred to as IEEE-1394b and uses a slightly different connector with throughputs up to 3.2 Gbps eight times faster than the previous standard (IEEE 1394).

In summing up, most digital video camcorders/cameras are now equipped with a FireWire (IEEE-1394) port and downloading camcorders/cameras to a PC is now a snap!

As prices for these devices decrease, home video productions will become more popular.

Even though the cost of FireWire is relatively high in comparison to USB 2.....you get what you pay for!

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