Boundary scan - meaning and definition. What is Boundary scan
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What (who) is Boundary scan - definition

Boundary Scan; JTAG boundary scan; Boundry Scan; Boundary scan test
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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). (1995-02-14)
Boundary scan         
Boundary scan is a method for testing interconnects (wire lines) on printed circuit boards or sub-blocks inside an integrated circuit. Boundary scan is also widely used as a debugging method to watch integrated circuit pin states, measure voltage, or analyze sub-blocks inside an integrated circuit.
Boundary scan description language         
DESCRIPTION LANGUAGE FOR ELECTRONICS TESTING
Boundary Scan Description Language
Boundary scan description language (BSDL) is a hardware description language for electronics testing using JTAG. It has been added to the IEEE Std.

Wikipedia

Boundary scan

Boundary scan is a method for testing interconnects (wire lines) on printed circuit boards or sub-blocks inside an integrated circuit. Boundary scan is also widely used as a debugging method to watch integrated circuit pin states, measure voltage, or analyze sub-blocks inside an integrated circuit.

The Joint Test Action Group (JTAG) developed a specification for boundary scan testing that was standardized in 1990 as the IEEE Std. 1149.1-1990. In 1994, a supplement that contains a description of the Boundary Scan Description Language (BSDL) was added which describes the boundary-scan logic content of IEEE Std 1149.1 compliant devices. Since then, this standard has been adopted by electronic device companies all over the world. Boundary scan is now mostly synonymous with JTAG.