IEEE 1149.4

Mixed-Signal Test Buswww.asset-intertech.com/Technologies/Standards-Corner/IEEE-1149-4.aspx


Scope: To define, document, and promote the use of a standard mixed-signal test bus that can be used at the device, sub-assembly, and system levels to improve the controllability and observability of mixed-signal designs
and to support mixed-signal built-in test structures in order to reduce test development time and costs, and improve test quality.

...bridging analog and digital test

IEEE 1149.4 defines an analog test bus that can drive current and measure voltages, enabling interconnect test, parametric test of discrete components, and mixed-signal testing of IC cores.  The committee defined an Analog Boundary Module and  an extension of BSDL called ABSDL. 

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