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FireWire and Firewire page combined
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Introduction
FireWire or IEEE1394 was developed in 80s and 90s by Apple to provide high-speed communications.
FireWire is available as wireless, fiber optic and coaxial versions, all using the same protocol. The technology is a peer-to-peer standard, that means that every connected device can be a host or client. Firewire can connect up to 63 devices.
Features of FireWire
- Peer-to-Peer networking allowing up to 63 devices to be connected per bus
- non-cyclic network
- automatic address selection
- no terminators needed in opposition of SCSI
- locations are random
- non-cyclic network
- Half-duplex 98.304 Mbps 1394a supports 2x (196.608) and 4× (393.216)
- 1394b provides full duplex 98.304 Mbps on 1x 2x 4x 8x 16x 32x
- Data encoding
1394b uses improvement of FibreChannel's 8b10b encoding
- Support for Direct Memory Access (DMA)
- Data-Strobe encoding providing less jitter than normal clock-data
- Like USB, backwards compatible
- Isochronous which means that between cycles are equal time intervals
Advantages of FireWire
- hot pluggable (support by udev)
- outstanding performance
- True data rates where USB normally only provides half the theoretical rate
- direct map to processor
Direct Memory Access for FireWire equipment
Comparison with UniversalSerialBus
FireWire