XJTAG

XJTAG: A Global Leader in Boundary-Scan Technology

XJTAG is a world-renowned supplier of JTAG boundary-scan hardware and software tools, with a well-earned reputation for innovative product development and high-quality technical support.

Based in Cambridge, UK, the company has grown significantly since the release of its first product in 2003 and now serves customers across the globe in a wide range of industries, including aerospace, automotive, defense, medical, telecommunications, and more.

At the core of XJTAG's offerings is the IEEE Std.1149.x standard, commonly known as JTAG (Joint Test Action Group). This boundary-scan technology allows engineers to perform advanced testing, debugging, and programming of electronic circuits. By using JTAG tools, developers can significantly shorten the design, development, and manufacturing processes of printed circuit boards (PCBs) and complex digital systems.

A Revolutionary Approach to Boundary-Scan

When XJTAG released version 1.0 of its tools in 2003, it introduced a fresh perspective to the boundary-scan market. Unlike traditional solutions that were often rigid and targeted solely at production testing, XJTAG emphasized reusability and accessibility. It was the first boundary-scan platform designed for a broad user base — design and development engineers, test engineers, contract manufacturers, and field service teams. This unified approach enabled seamless test creation and reuse throughout the entire product lifecycle, from prototype to production to in-field servicing.

One of XJTAG’s key innovations was the ability to test not only JTAG-enabled devices but also non-JTAG components on the board. This expanded the capabilities of boundary-scan, allowing engineers to perform functional and structural testing across a wider range of components and interconnections.

Openness and Flexibility

XJTAG believes in transparency and customer empowerment. Unlike many proprietary systems, XJTAG gives users access to and control over the script files used for testing non-JTAG devices. This openness allows clients to edit or enhance test scripts as needed, giving them the flexibility to adapt tests for revised components or specific project needs without depending solely on vendor support. This capability is especially valuable in high-pressure environments where time-to-market is critical.

Product Portfolio

XJTAG offers a range of hardware and software tools tailored to various stages of the product development process. Some of their flagship products include:

• XJAnalyser: A powerful real-time debugging tool that enables engineers to visualize and manipulate the state of signals and devices on a JTAG chain. It provides an interactive interface to monitor pins and detect faults quickly.
• XJDeveloper: This software is used to create, debug, and manage JTAG test projects. It allows for easy integration of custom scripts, test reuse, and device programming, offering a flexible and scalable solution for developers.
• XJRunner: Designed for production environments, XJRunner is optimized for high-throughput testing and programming. It offers a user-friendly interface for running pre-configured test suites with minimal operator training.
• XJTAG Expert: A boundary-scan test and programming system specifically tailored for use with flying probe and in-circuit testers, such as those made by Takaya or Keysight. This tool allows test engineers to harness the power of boundary-scan in traditional test environments.
• XJLink2: A versatile USB-to-JTAG controller that supports high-speed testing and device programming. It includes a range of features like programmable logic level support, configurable pin assignments, and support for long cable lengths, making it ideal for both lab and production use.

These tools are designed to be interoperable and scalable, supporting small-scale R&D environments as well as high-volume production lines.

Global Reach and Industry Trust

Today, XJTAG is a multimillion-dollar enterprise with customers in over 100 countries. It partners with more than 50 distributors and technology providers worldwide to deliver localized support and integration services. This global network ensures that clients — from small design houses to multinational manufacturers — receive timely assistance and the latest updates.

Industries that demand high reliability and precision — such as aerospace and defense — rely on XJTAG products to maintain rigorous testing standards. Similarly, sectors like medical devices and automotive benefit from XJTAG’s ability to catch early-stage design flaws, streamline diagnostics, and ensure robust quality control.

XJTAG has earned its position as a leader in the boundary-scan industry through a unique combination of technical excellence, customer-centric design, and forward-thinking innovation. By embracing openness, usability, and test reuse, XJTAG has redefined what engineers expect from JTAG tools. Its products not only accelerate development and reduce costs but also empower engineers with deep insight into the behavior of their electronic systems.

As electronic systems become more complex and miniaturized, the need for efficient and reliable test solutions continues to grow. XJTAG is well-positioned to meet this demand and drive the evolution of boundary-scan technology into the future.

How XJTAG uses JTAG/boundary Scan to test a board

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