IEEE 1394 (FireWire)

（电脑）通用串行接口。USB 1.1的理论传输速率是11M/s。USB 2.0 理论速度可达480M/s。这极大地挑战了Firewire技术。

火线接口技术。表现出色的串行总线。传输速率很快（400百万比特/秒，1394b达到800M）。很稳定。笔记本电脑、苹果机使用广泛。数码摄像机中使用得比数码相机使用普遍。以前曾是最佳传输技术。目前受到USB2.0的挑战。

A low-cost digital interface originated by Apple Computer as a desktop LAN and developed by the IEEE 1394 working group. Can transport data at 100, 200, or 400 Mbps. One of the solutions to connect digital television devices together at 200 Mbps.
Serial Bus Management provides overall configuration control of the serial bus in the form of optimizing arbitration timing, guarantee of adequate electrical power for all devices on the bus, assignment of which IEEE 1394 device is the cycle master, assignment of isochronous channel ID, and notification of errors.
There are two types of IEEE 1394 data transfer: asynchronous and isochronous. Asynchronous transport is the traditional computer memory-mapped, load and store interface. Data requests are sent to a specific address and an acknowledgment is returned.
In addition to an architecture that scales with silicon technology, IEEE 1394 features a unique isochronous data channel interface. Isochronous data channels provide guaranteed data transport at a pre-determined rate. This is especially important for time-critical multimedia data where just-in-time delivery eliminates the need for costly buffering.