Saturday, March 12, 2011

Comparison of VPX, CPCI-e and CPCI

VPX, formerly known as VITA 46, is an ANSI standard (ANSI/VITA 46.0-2007) that provides VMEbus-based systems with support for switched fabrics over a new high speed connector.

Technologies called for in VPX include:
  • Both 3U (100mm by 160 mm) and 6U (160mm by 233 mm) formats
  • New 7-row high speed connector rated up to 6.25 Gbit/s
  • Choice of high speed serial fabrics
  • PMC,FMC (VITA 57) and XMC (VITA 42) mezzanines
  • Hybrid backplanes to accommodate VME64, VXS and VPX boards

CPCI or cPCI is an abbreviation of CompactPCI. A CompactPCI system is a 3U or 6U Eurocard-based industrial computer, where all boards are connected via a passive PCI backplane.

Defined for both 3U (100mm by 160 mm) and 6U (160mm by 233 mm) card sizes, CompactPCI has the following features:

  • Standard Eurocard Dimensions (complies with IEEE 1101.1 mechanical standards)
  • High Density 2mm Pin-and-Socket Connectors IEC approved and Bellcore qualified)
  • Vertical Card Orientation for good cooling
  • Positive Card Retention
  • Excellent Shock and Vibration Characteristics
  • Metal Front Panel
  • User I/O Connections on Front or Rear of module
  • Standard Chassis available from many Suppliers
  • Uses Standard PCI Silicon Manufactured in Large Volumes
  • Staged Power Pins for Hot Swap Capability (Future)
  • Eight Slots in Basic Configuration. Easily expanded with Bridge Chips
CPCI-e is an abbreviation of CompactPCI express. CompactPCIe utilizes many of the same features as legacy CompactPCI, but changes the PCI bus for the new PCIe bus.

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