JTAG Technologies is committed to helping you succeed with boundary-scan. We will ensure that your organisation gets the maximum return on investments and receives the greatest benefits from this technology. Look through our support section for whatever kind of information you might need and feel free to contact us if the answer to your question is not provided. For registered users, this section provides access to additional information and downloads.


Reducing the PCB Bone Pile: Optimizing Test Strategy


The many faces of the JTAG interface port

We like to keep you informed


There is no limit to the chain architecture that ProVision can handle. Fanout considerations and chain cycle speed would enter into the decision as to how long a chain to implement. Refer to the DFT booklets for more information. ProVision constructs your chain topology for you, automatically, so you don’t need to input it and can be certain it’s error-free.

There is no limit to the number of chains that the JTAG Technologies software can handle, and there is no loss in test coverage if you decide to have multiple chains. In many cases, partitioning your board into more than one chain will give you greater design flexibility and may improve the performance of your boundary-scan operations. Therefore, we strongly recommend that you consider using more than one chain on your board. For more detail, refer to our DFT booklets, one for board-level design and the other for system-level design.

Read the BSDL file published by the IC manufacturer. If it is compliant, it should say so in the notes. Also check the BSDL for special compliance requirements. In some cases it may be necessary to hold specified pins at defined voltage levels for the part to perform boundary-scan operations. If in doubt, please contact JTAG Technologies for advice.

In many cases, only a fraction of the ICs on a board need to contain boundary-scan in order to test a significant number of nets. Many boundary-scan devices tend to be complex ICs (FPGAs, PLDs, microprocessors, ASICs, etc.) with a large number of I/Os and therefore are capable of providing direct access to a large number of nets. Also, through the use of DIOS modules, you can greatly increase the test coverage. JTAG ProVision’s fault coverage feature will tell you the attainable testability and your actual coverage.

Very little. Boundary-scan helps eliminate or reduce the number of test points required on a board and may result in a net saving of real estate and a simpler layout. The space required to add a small number of passive devices for TAP lead termination and the TAP header is often offset by the test point reduction. Refer to the JTAG Technologies design guidelines for specifics.


Tell me about JTAG software

Tell me about JTAG/boundary-scan

Tell me more about test strategy

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We have been able to solve thousands of board test problems by actively engaging with our customers. Once you become a JTAG Technologies customer you are an integral part of our business with free access to our world-wide support network.


JTAG Technologies – Corporate story

Advantages and applications of boundary-san

JTAG Technologies, the future for your ATE


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Live Webinars

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Please come back later, for an overview of the previous recordings please click here.

Recorded webinars

Introduction to boundary-scan

An eye-opener in the world of structural testing using JTAG/boundary-scan aka IEEE Std 1149.1. Many electronics assemblies already include JTAG/boundary-scan test circuitry which is either underused or not used at all.

This webinar aims to inform test and development engineers of the possibilities of this built-in test and device programming feature.

Includes sections on:

– Device-level technology * EXTEST and other instructions
– Board-level test and programming possibilities
– Options for test generation
– Hardware controller options

More about boundary-scan – advanced topics

This is a follow-up to the first webinar ‘An introduction to boundary-scan’.

– Automatic generation of different JTAG test applications (ATPG vs Scripting)
– Analyzing the Results

This webinar covers how effective boundary-scan board (PCBA) tests can be generated without coding. Different types of tests are explained and the process is shown to automatically generate these tests.



JTAG/Boundary-scan Design For Test Overview

JTAG/Boundary-scan logic exists in many of today’s ICs that are built into 1000s of electronic circuit designs. Using this logic to best effect will save money during design debug, throughout manufacturing test and into field service.

This webinar introduces the topic of Design for Test using boundary-scan/JTAG and highlights some of the basic requirements and pitfalls to avoid.

Consulting, experience and expertise

We have been able to solve thousands of board test problems by actively engaging with our customers. Once you become a JTAG Technologies customer you are an integral part of our business with free access to our world-wide support network.