Specifications

The 9-pin FireWire 800 connector is shown in Figure 3-2 (page 33). Its connector signals and pin assignments

are shown in Table 3-2 (page 33).

Figure 3-2 9-pin FireWire 800 connector

21 3 4

89 67 5

Table 3-2 Signals on the 9-pin FireWire 800 connector

DescriptionSignal namePin

Twisted-pair B MinusTPB–1

Twisted-pair B PlusTPB+2

Twisted-pair A MinusTPA–3

Twisted-pair A PlusTPA+4

Twisted-pair A Ground ReferenceTPA (R)5

Power GroundVG6

Status Contact (no connection; reserved)SC7

Power Voltage (approximately 25 V DC)VP8

Twisted-pair B Ground ReferenceTPB (R)9

VP (pin 8) provides up to 15 W power, shared with the other FireWire connectors. The voltage on the power

pin is approximately 25 V.

The 9-pin FireWire port is capable of operating at 100, 200, 400, and 800 Mbps, depending on the device it is

connected to. Using a cable with a 9-pin connector at one end and a 4-pin or 6-pin connector at the other, the

9-pin port is capable of directly connecting to all existing FireWire devices. Using a cable with 9-pin connectors

at both ends, the 9-pin port is capable of operating at 800 Mbps.

Input and Output Devices

FireWire Ports