![6 to 4 pin Firewire [IEEE-1394] connector Pin-out](1394_Cable.jpg)
6 pin to 4 pin Firewire [IEEE-1394] interconnection and pinout
Signal names and pinout for the 6 and 4 pin connectors: [1394a-2000 added the 4 pin connector]
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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 backplane version uses two single ended signals and operates at 12.5Mbps [TTL], 25Mbps [TTL], or 50Mbits/sec [BTL or ECL]. The cable (differential) version operates at 100Mbps, 200Mbps, or 400Mbits/sec, [800Mbits/sec for 1394b] using half-duplex [full duplex 8B/10B encoding for 1394b]. Revision 'c' due out the first quarter of 2008 adds Gigabit Ethernet to the cable and increases the speed to 800Mbits/sec and 1600 Mbit/sec. Longer cable distance will also be increasing to 100m using UTP at S100, POF at S200 (S400), GOF at S3200 Devices on the bus are Hot-Swappable. It supports up to 63 devices at a maximum cable distance between devices of 4.5 meters. The maximum devices on the bus is 16 allowing a total maximum cable distance of 72 meters. Transmitting data over CAT5 cable allows data at 100Mbps to travel 100m [1394b]. Fiber cable will allow 100 meter distances at any speed [depends on the type of fiber cable]. |
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.
Epson
Fujitsu Microelectronics
Inc.
Genesyslogic 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}
Oxford Semiconductor Ltd {Bridge
chip providing ATA/ATAPI (IDE) peripherals with FireWire (IEEE1394, 1995)
connectivity}
STMicroelectronics {IEEE1394}
TI {Link/Physical Layer Controller
IC}
VIA Technology Inc. {Link-Layer /
PHY Chipset}
IC Manufacturers {All other types} {This Site}
{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
IEEE1394b is the latest released standard.
IEEE-STD-1394c-2008: IEEE Standard for a High Performance Serial
Bus
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
{1394ta.org}
Apple
IEEE {Institute of Electrical and
Electronic Engineers, Inc.}
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}
TC Applied Technologies Ltd {IEEE1394 (Firewire) semiconductors}
Tyco Electronics
FireWire Stuff {Cables -
Adapters - Equipment}
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, 30volts
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]}
Electronic Design Key words: FireWire Pinout, Fire Bus, IEEE-1394 Bus, Apple's Bus, High Performance Serial Bus, Personal Computer Bus, PC Bus, Fire Wire peripheral Bus, Physical, Mechanical, Size, Type, Description, ICs, Integrated Circuits, Products, Manufacturers, specification, Industrial Control Bus Description, Connector Pins, Signal Names, Pin Out
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