IEEE P1149.4/D14, Apr 2009
Signal Test Bus
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About This Item
P1149.4/D14, Apr 2009 is a Signal Test Bus standard for components, circuits, devices and systems, describing a technical framework for test access and signal handling in electronic designs. It is intended to support consistent verification practices where bus-based test connectivity is needed during development, integration, or evaluation. As an inactive standard, P1149.4/D14, Apr 2009 is mainly relevant for reference, legacy compliance review, and engineering documentation tied to established test architectures.
Overview of P1149.4/D14, Apr 2009
This specification focuses on the signal test bus concept used to improve observability and controllability in electronic systems. P1149.4/D14, Apr 2009 is associated with components and circuit-level test design, where structured access to signals can help support analysis, troubleshooting, and manufacturing test planning. In practice, it provides a common technical reference for teams working with design-for-test requirements, system interconnects, and verification workflows that depend on predictable signal access.
Typical use cases
P1149.4/D14, Apr 2009 is typically used when engineers need a defined approach for signal test bus implementation across boards, devices, or integrated subsystems. It may be relevant in electronic product development, validation laboratories, and production test environments where repeatable access to internal signals is important. The standard can also support documentation for legacy systems, procurement reviews, or compliance assessments involving test-oriented circuit architecture and structured bus connectivity.
Why it matters
This standard matters because signal test bus practices can affect how easily a design is verified, debugged, and maintained. P1149.4/D14, Apr 2009 offers a stable reference point for organizations that need consistency in test architecture and clearer control over how signals are accessed during evaluation. Using a defined standard can reduce ambiguity across design and test teams, support more reliable comparisons between implementations, and lower the risk of mismatched expectations in engineering and procurement.
- Signal test bus framework
- Component and circuit-level context
- Test access and observability
- Legacy and reference use
- Engineering verification support
- Publication Date: 2009
- Standard Status: Inactive
- Publisher: IEEE
- Subject: Components, Circuits, Devices and Systems
- Official IEEE: Doi link
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