The CN7-REVERB is a CompactPCI® peripheral
card, suitable for any common 32-bit CPCI
parallel backplane, either 33MHz or 66MHz
clock. Since the 82574IT Ethernet controllers
are based on the PCI Express® high speed serial
interface, the proven PLX PEX8112 PCI to PCI
Express® bridge is provided on-board, as data
transfer pathway.
In addition, the CN7-REVERB is equipped with
the PLX PEX8606 6-lane 6-port PCI Express®
packet switch. One lane is tied to the bridge
chip as the upstream (host) port, while the
other five downstream lanes/ports are
dedicated to the Ethernet controller devices.
Each PCI Express® port is a virtual PCI to PCI
bridge device and will be configured using
standard (BIOS) PCI enumeration. Hence, the
original Intel® networking drivers and tools
(available by download for a variety of OS) are
unaltered and smoothly suitable for the
CN7-REVERB.
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The CN7-REVERB is a perfect solution for a
variety of networking applications such as
router, firewall, gateway, fieldbus segmentation
or medium resolution vision systems.
However, at 33MHz, the 32-bit CompactPCI®
backplane would be limited to 133MByte/s
maximum data throughput. Needless to say,
that this bandwidth would not be sufficient, if
an application needs continuous support for
high data rates simultaneously over all the
Ethernet ports available on the CN7-REVERB.
Hence, for QOS based and realtime
applications, e.g. vision systems with high
resolution cameras, consider the CCL-CAPELLA
as an alternative solution, with four
independent 82574IT Ethernet controllers.
Since the CCL-CAPELLA is a mezzanine side card
to EKF CPU boards, the CPCI backplane
bottleneck will be avoided (immediate
connection established by a PCI Express® x 4
link instead).
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