editor's blog
Subscribe Now

Analysis by Braille

As a technology, JTAG (or IEEE 1149.1) has been leveraged a lot of ways to do a lot of things that may not have been envisioned when it was first developed. Its original mission, however, was rather simple: provide a way to test whether the board connection between two chips was intact. And, while individual components have a way of describing their internal chains via a BSDL file, according to the folks at JTAG Technologies, there is no such simple equivalent for the entire board’s chain.

So if you’re a simple repair shop without access to full design netlists and such, how do you leverage JTAG to confirm whether the connections on a suspect board are intact?

JTAG Technologies has just announced a product called Autobuzz that will let you establish a JTAG chain baseline for a board that you can then use to test other boards. As the name suggests, it can go through and “buzz” out the connections without really knowing much about the board.

It does this by establishing a reference almost blindly from a known good board in “learn” mode. You can then run the tool in “compare” mode on a board in question to determine whether it matches up.

You do need the BSDL files of the individual components (often available online) and you do need to know the order of the devices in the chain, which may be a bit trickier for complex boards, where you can’t visually inspect the traces, but if you’re a serious shop, you will most likely have access to the board schematic, from which the chain order can be easily deduced.

More info on their press release

Leave a Reply

featured blogs
May 7, 2021
In one of our Knowledge Booster Blogs a few months ago we introduced you to some tips and tricks for the optimal use of Virtuoso ADE Product Suite with our analog IC design videos . W e hope you... [[ Click on the title to access the full blog on the Cadence Community site. ...
May 7, 2021
Enough of the letter “P” already. Message recieved. In any case, modeling and simulating next-gen 224 Gbps signal channels poses many challenges. Design engineers must optimize the entire signal path, not just a specific component. The signal path includes transce...
May 6, 2021
Learn how correct-by-construction coding enables a more productive chip design process, as new code review tools address bugs early in the design process. The post Find Bugs Earlier Via On-the-Fly Code Checking for Productive Chip Design and Verification appeared first on Fr...
May 4, 2021
What a difference a year can make! Oh, we're not referring to that virus that… The post Realize Live + U2U: Side by Side appeared first on Design with Calibre....

featured video

The Verification World We Know is About to be Revolutionized

Sponsored by Cadence Design Systems

Designs and software are growing in complexity. With verification, you need the right tool at the right time. Cadence® Palladium® Z2 emulation and Protium™ X2 prototyping dynamic duo address challenges of advanced applications from mobile to consumer and hyperscale computing. With a seamlessly integrated flow, unified debug, common interfaces, and testbench content across the systems, the dynamic duo offers rapid design migration and testing from emulation to prototyping. See them in action.

Click here for more information

featured paper

Compact. Precise. Connected. Increase productivity with intelligent edge computing.

Sponsored by Texas Instruments

Smart devices in factories and buildings are getting smaller and more capable, with enhanced real-time control, robust connectivity, and configurable web services. Read about new processor technology that is unleashing the true potential of Industry 5.0 and the Internet of Things.

Click here to read more

featured chalk talk

Thunderbolt Technology Overview

Sponsored by Mouser Electronics and Intel

Thunderbolt is the closest thing we’ve got to universal interconnect between a wide variety of devices and systems. With a universal USB-C connector, it can do video, power, data communication - all at scalable rates with smart adjustment. In this episode of Chalk Talk, Amelia Dalton chats with Sandeep Vedanthi of Intel about the latest in Thunderbolt technology - Thunderbolt 4, which brings a number of benefits over previous versions.

Click here for more information about Intel 8000 series Thunderbolt™ 4 Controllers