eBook highlights JTAG boundary-scan role in board test
Circuit boards with self-healing buses like Intel QuickPath Interconnect (QPI) can be a challenge to test and assure board quality unless JTAG boundary-scan (IEEE 1149.1) tests are included in manufacturing, according to a new eBook from ASSET InterTech. ASSET is a leading supplier of debug, validation and test tools based on embedded instrumentation for software, chips and systems.
“For circuit board manufacturers, self-healing can mean self-defeating,” said Kent Zetterberg, author of the eBook and a product manager at ASSET. “Self-healing doesn’t mean that the bus restores itself when it has a structural fault like a short or an open. It actually downgrades its performance. As a result, functional test won’t detect the faults, but users will and they will probably not be too satisfied and return the product. JTAG-based boundary-scan tests diagnose the problem down to the pin level so the manufacturer can fix it before users receive the product.”
The new eBook is titled “JTAG Diagnostics for Intel QUP Structural Defects”. It is available now as a free download from the eResources center on the ASSET website at: http://www.asset-intertech.com/Footer/eBooks/JTAG-Diagnostics-for-Intel-QPI-Structural-Defects .
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