boundary scan


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boundary scan

The use of scan registers to capture state from device input and output pins. IEEE Standard 1149.1-1990 describes the international standard implementation (sometimes called JTAG after the Joint Test Action Group which began the standardisation work).
This article is provided by FOLDOC - Free Online Dictionary of Computing (foldoc.org)

scan technology

A method for testing chips on the printed circuit board by building the chip with additional input and output pins that are used only for test purposes. Full scan methods test all the registers on the chip. Partial scan tests some of them, and boundary scan tests only the input/output cells. JTAG is the IEEE standard for boundary scan. See also scan rate.
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References in periodicals archive ?
Engineers can simplify their test systems by using boundary scan to reduce the number of probes needed in a test fixture while still maintaining or improving test coverage.
Based on strong customer demand XJTAG has worked with Takaya's European distribution partner, Systech Europe, to create a powerful combination by integrating JTAG boundary scan with flying probe testing capabilities.
While boundary scan is widely adopted, challenges are bound to happen during the implementation phase that will frustrate test and design engineers.
Boundary scan has become an important limited access solution for printed circuit board assemblies, and includes tests for digital integrated circuits interconnection, as well as testing and programming digital devices such as flash, EEPROM and serial peripheral interface (SPI) devices.
For example, there is a model for each Boundary Scan component describing the IC's Boundary Scan structure, a so-called BSDL (Boundary Scan Description Language) model.
The schematic is reviewed to determine if boundary scan is an option.
Supplier of Automatic Test Equipment Teradyne Inc (NYSE:TER) disclosed on Monday that it has signed an agreement with boundary-scan software and hardware products and services technology company JTAG Technologies, to sell and distribute its Symphony/TS boundary scan product.
Boundary scan tools can use IEEE 1149.1 not only to test the interconnect nodes, but also between the interconnect nodes and other nodes that have test access, but are not part of the boundary scan chain.
Safety and standards set by the automotive industry are likely to drive the functional test market as more revenues are also likely to come from the cheaper and reusable options that boundary scan offers, Frost said.
Other expert groups being created in the wake of Sun's new Java community development process include JMAPI and boundary scan. Sun claims there are plenty of others gathering steam.
Cambridge, United Kingdom, October 02, 2017 --(PR.com)-- XJTAG[R], a world leading supplier of boundary scan technology has launched a major update to its flagship software, XJDeveloper.