User Manual

FireWire

PIKE Technical Manual V5.1.2

1394b bandwidths

According to the 1394b specification on isochronous transfer, the largest data

payload size of 8192 bytes per 125 μs cycle is possible with a bandwidth of

800 Mbit/s.

For further details read Chapter How does bandwidth affect the frame rate? on

page 288.

Requirements for PC and 1394b

Today’s PCs are equipped with the PCIe bus (PCI Express).

1394b also requires low latency for data transmission (due to small receive-

FIFO). In order to get the most out of your camera-to-PC configuration, we rec-

ommend the following chipsets for your PC:

• For Intel-based desktops, chipset 945 (or higher)

• For non-Intel based desktops (e.g. AMD), PCI Express compatible chipset

For multi-camera applications one of the following bus cards is needed:

• PCI ExpressCard with potential 250 MByte/s per lane (up to four sup-

ported by chipset)

PCIe factor PCIe 1.0 PCIe 2.0 PCIe 3.0

x1 250 MByte/s 500 MByte/s 1000 MByte/s

x2 500 MByte/s 1000 MByte/s 2000 MByte/s

x4 1000 MByte/s 2000 MByte/s 4000 MByte/s

x8 2000 MByte/s 4000 MByte/s 8000 MByte/s

x16 4000 MByte/s 8000 MByte/s 16000 MByte/s

x32 8000 MByte/s 16000 MByte/s 32000 MByte/s

Table 5: Theoretical bandwidth of PCIe (PCI Express)

www

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For more information:

http://support.intel.com/support/chipsets/#desktop