IEEE 1394
HIGH PERFORMANCE SERIAL BUS
[Firewire Description]
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Firewire [IEEE-1394] defines a media, topology and protocol for both a
backplane physical layer or point-to-point serial cable interface. The
interface is also called the High Performance Serial Bus (HPSB). On the
Apple computer it became the high-performance replacement for the Apple
Desktop Bus (ADB). |
The digital interface supports either asynchronous and isochronous data
transfers. Addressing is used to a particular device on the bus. Each
device determines its own address.
Note, beginning in 2008 Apple Computer was no longer providing Firewire on some of its Notebook computers. As of Nov 2009 Firewire is only found on three of the five MacBooks being offered. The smallest of the MacBooks do not offer Firewire, while the larger three units offer one FireWire 800 port. As of 2011 search traffic continues to decline to about half what it was in 2009.
Epson
Fujitsu Microelectronics
Inc.
Genesys logic company {USB 2.0
to IEEE-1284/DMA Bridge Controller/UTMI Compliant Transceiver, ATA/ATAPI
Controller, Disk Controller}
NEC Corp.
NXP {IEEE1394 link layer controller/Physical layer
interface ICs}
STMicroelectronics {IEEE1394}
TI {Link/Physical Layer Controller IC}
IC Manufacturers {All other types}
{Firewire [IEEE-1394] Bus Index}
IEEE-STD-1394-1995: IEEE Standard for a High Performance Serial Bus
IEEE-STD-1394a-2000: IEEE Standard for a High Performance Serial Bus
IEEE-STD-1394b-2002: IEEE Standard for a High Performance Serial Bus
IEEE-STD-1394c-2008: IEEE Standard for a High Performance Serial Bus
IEEE1394c is the latest released standard.
Serial Bus Protocol 3: [SBP-3]; specifies a protocol for the
transport of commands, data and status between devices
Also refer to; ANSI/SCTE 26 2004, Home Digital Network Interface Specification
with Copy Protection
1394 Trade Association {www.1394ta.org}
IEEE {Institute of Electrical and
Electronic Engineers}
I believe that the term Firewire is a trade mark, so search on IEEE-1394 for data.
Advanced-Connectek INC. 'ACON'
Amphenol {FireWire Plugs and
Receptacles}
DDK Electronics,
Inc
FCI {IEEE 1394 Connectors}
Foxconn {IEEE 1394 Type A, Type B, Combo Connectors}
ITT Cannon {USB Board: Horizontal
SMT, Horizontal DIP, Upright DIP. USB Cable: Plug type}
Keystone {Plug and Socket IEEE1394
Connectors; Horizontal/Vertical Mounting Style, SMD/Thru-hole}
Kycon {IEEE1394 Surface Mount
Connectors, Right Angle, Upright, PCB Mount, 4-pin}
Molex {IEEE 1394 Connectors and Cable
Assemblies}
Switchcraft {Right angle PC and
surface mount to 1394R-4006N}
Tyco Electronics
Two types of connectors are used with FireWire; 4 pin connector (consumer
electronics), and a 6 pin connector (computers).
The 6 pin connector has the following pinout:
Pin 1; Power, 30 volts
Pin 2; Ground
Pins 3, 4; B Twisted pair (-/+)
Pins 5, 6; A Twisted pair (-/+)
Cable shield
Pins 3/4 are crossed with pins 5/6 at the opposite ends of the cable. The
transmitter sends clock [Strobe] on 3/4, and data on 5/6.
Pin Number | 6 Pin Connector | 4 Pin Connector |
1 | VP | TPB* |
2 | VG | TPB |
3 | TPB* | TPA* |
4 | TPB | TPA |
5 | TPA* | (Shell) VG |
6 | TPA | - |
Pin # | Signal name | Pin Function |
1 | TPB* | Twisted Pair B, Minus |
2 | TPB | Twisted Pair B, Plus |
3 | TPA* | Twisted Pair A, Minus |
4 | TPA | Twisted Pair A, Plus |
5 | TPA (R) | Ground, Twisted Pair A |
6 | VG | Power Ground |
7 | NC | No Connection |
8 | VP | Power Voltage |
9 | TPB (R) | Ground, Twisted Pair B |
Plug Shield | Cable Shield | Ground |
Note the pin out table for the 4-Pin and 6-Pin connector is not an
interconnection table, it just defines the pinout.
Use the schematic above to determine interconnection.
{FireWire Bus Index [IEEE-1394]}
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