AC-JTAG (IEEE 1149.6) Explained… sort of.
just ran across the following article, “Dot 6 Explained” at the Components In Electronics website. I’m always interested in a good article on 1149.6 because it seems like a larger and larger percentage of interconnect is implemented with differential signaling – at least in my corner of the industry – and the longer I don’t use AC-JTAG, the less benefit I derive from boundary scan as a whole.
So I set in to read this article, and came out as foggy on the subject as before. My guess is that some editor chopped the hell out of it, because any sort continuity was hidden or non-existent. There were multiple referrals to a missing diagram or sidebar, and just when you thought the meat of the article was upon you, it abruptly ended with the marketing paragraph about the product, which, BTW is JTAG Technologies‘ ProVision.
Oh well… anybody out there have a better source (other than the text of the standard) of information on this technology? Speak up!
Update: See the comment from James Stanbridge below. It appears his article was “somewhat edited”. Also, I fixed the URL to JTAG Technologies above, which was wrong in the article. And my apologies to James is I maligned his writing – I guess it’s hard to maintain control over content after it’s been submitted in some places?
Stumble It!
Dear John
First of all – thanks for taking the time to read the article – I have written quite a few over the years and I’m never quite sure they ever get the audience I hope for.
Indeed you are correct in your guess that it has been somewhat edited. I am also guessing that you only saw an online version as the printed version did include the ’sidebar’ containing additional deatails of the transmit and receive logic with a verbose explanation.
In total I supplied 6 or 7 graphics of which only two were printed and none appeared online. I would be happy to supply you more details of the article submitted and add further technical details (within my limits as a humble salesman).
You have my e-mail form above but they also printed the wrong web-address for JTAG which should be wwww.jtag.com .
I look forward to hearing from you in due course.
Kind regards
James
James:
Thanks for the reply – and count me a bit amazed that you saw my post, and so quickly. I also never really know whether I’m getting the audience I hope for.
Thanks for offering more detail. I’ll take what I can get. I’m very interested in the technology. Is there any way I could get the full article including the graphics and sidebar? Maybe I could get the whole thing online here?
Cheers,
John
[...] few days ago I wrote a plaintive post about an article I came across somewhere out there on the net, with the title “Dot 6 [...]
Hello,
I am also interested in getting information about IEEE 1149.6 to study it. Do you have other soruces where I may get some online information about it?
regards.