openVPX
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OpenVPX, known formally as VITA 65, is a widely-adopted standard that specifies a framework for interoperability within VPX (VITA 46) systems, which are used extensively by the defense and aerospace industries. This standard ensures that modules and systems developed by different vendors can work seamlessly together, promoting flexibility and choice in building complex systems.
Background and Importance
VPX (VITA 46) is an advanced computing standard that uses high-speed serial fabrics to achieve high performance, ruggedized computing solutions primarily intended for embedded computing systems. Given the diversity and complexity of these applications, achieving true interoperability was a challenge due to the multitude of possible configurations and vendor-specific implementations. OpenVPX addresses this by creating a more defined architecture within the VPX framework.
OpenVPX plays a critical role in system design and procurement. For defense applications, interoperability and sourcing from multiple vendors are crucial for reducing costs, facilitating upgrades, and ensuring a reliable supply chain. By adhering to the OpenVPX standard, vendors and customers ensure that components will fit and function together out-of-the-box, reducing integration time and effort.
Technical Specifications
OpenVPX (VITA 65) outlines several key aspects for compliance:
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Backplane Topologies:
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Defines specific slot profiles for interoperability between modules and backplanes.
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Specifies power requirements, signaling types, and physical dimensions.
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Module Profiles:
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Illustrates various module types (payload, switch, storage, etc.) with standard interface configurations.
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Ensures uniformity in module size, interface locations, and connectivity to enable plug-and-play functionality.
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Mechanical Profiles:
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Outlines the physical dimensions and connector placements of cards to standardize fit and alignment.
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Includes specifications for cooling techniques (air, conduction, etc.).
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Data-Transfer Protocols:
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Supports multiple high-speed data protocols like PCI Express, RapidIO, 10 Gigabit Ethernet, and others.
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Defines how these protocols are implemented and routed through the backplane.
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Connection and Pin-out Standards:
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Specifies detailed pin-out and mapping for connector interfaces.
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Ensures robust and error-free communication pathways between modules and system components.
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Benefits
Interoperability: - Ensures that modules from different vendors interact smoothly, which simplifies system integration.
Scalability: - Allows for configurations to evolve over time, enabling upgrades without complete redesigns.
Modularity: - Facilitates swapping or upgrading individual modules as needed, enhancing system lifespan and performance.
Cost Efficiency: - Open competition among vendors leads to cost savings and innovation, as systems are not locked into a single supplier.
Conclusion
OpenVPX represents a benchmark in the realm of modular, high-performance embedded computing, especially for critical applications in defense and aerospace. By adhering to this standard, engineers and organizations benefit from guaranteed compatibility, ease of integration, and the ability to scale and upgrade systems efficiently. This not only streamlines development but also ensures robust and reliable operation in demanding environments.