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.

Read more about Boundary ScanTesting, Debugging, History

Other articles related to "boundary scan, boundary":

Wiggler (JTAG) - Communications Model - Boundary Scan Register
... However, devices that support boundary scan contain a shift-register cell for each signal pin of the device ... registers are connected in a dedicated path around the device's boundary (hence the name) ... The contents of the boundary scan register, including signal I/O capabilities, are usually described by the manufacturer using a part-specific BSDL file ...
Bead Probe Technology - Alternatives
... Boundary scan integrates test components into the integrated circuits (ICs) mounted on the board, giving the ability to read or drive the ICs' pins ... A boundary scan controller uses four or more dedicated pins on the board to control test cells serially and receive the measured values ... It has the disadvantage of needing board infrastructure to support boundary scan ...
Atmel AVR - Debugging Interfaces - JTAG
... JTAG can also be used to perform a Boundary Scan test, which tests the electrical connections between AVRs and other Boundary Scan capable chips in a system ... Boundary scan is well-suited for a production line the hobbyist is probably better off testing with a multimeter or oscilloscope ...
Boundary Scan - History
... IBM developed level-sensitive scan design (LSSD). ...
Serial Vector Format
... Serial Vector Format (SVF) is a file format that contains boundary scan vectors to be sent to an electronic circuit using a JTAG interface ... Boundary scan vectors consist of the following data Stimulus data This is data to be sent to a device or electronic circuit Expected response This is the data the device or circuit is ... Control over the format has been handed off to boundary-scan solution provider ASSET InterTech ...

Famous quotes containing the word boundary:

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    Charles Stewart Parnell (1846–1891)