Every HW Engineer Needs To Know This About JTAG (with David Ruff)

Comments · 45

• TH

  @theondono · 5 years ago

  I’ve had JTAG boundary scan in my “things to learn” for years!!<br><br>Great video as always!

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• TH

  @theonlyari · 5 years ago

  I was in a training session with Dave a few years ago. He called the projector remote an &quot;ooferdoofer&quot;. I dont think i&apos;ll ever forget that. With that said, XJTAG is an awesome tool.

  4

• AN

  @AndrewRafas · 4 years ago

  This video was an eye opening experience, thanks for that!!! I have been procrastinating watching this video because the 2 hours length was off putting, but in the end I can say that it have been awesome to watch the uncut version. So much useful content...

  1

• PU

  @pupu-hm8cg · 5 years ago (edited)

  JTAG becomes a truly powerful tool when the chip allows write and read access to all (or at least most) device internal registers and memories over JTAG to internal bus such as AXI bridge. Common thing for debugging complex FPGAs and SoCs, with FPGAs also having internal logic analyzer tools from which sampled data can be read over the same JTAG interface.<br><br>Usually we would test more complex boards with higher level software and separate test fixtures. Like running DDR memory tests from bootloader and other peripherals from Linux. This allows testing of high speed interfaces at their nominal frequencies. It is also worth noting DDR controllers have comprehensive training and test modes that don&apos;t require fast speeds for register writes and reads to run. Its all offloaded to DDR controller hardware.<br><br>JTAG for initial programming. U-Boot / other bootloaders for DDR testing. Linux for everything else.

  5

• DI

  @DiegoColl44 · 5 years ago

  excellent video..!! super interesting ... I have to start studying more about jtag. thanks to both of you.!

  2

• MU

  @MuhammadZahid-kz9lx · 3 years ago

  I really liked it. The presentation content was impressive

• RU

  @RunPJs · 1 year ago

  My new job going forward. Very useful on top of the normal JTAG training

• ME

  @megamojes · 4 years ago

  Great video. I watched till the end. Thanks!

• GU

  @guillep2k · 5 years ago

  On the many times you&apos;ve asked &quot;what should I make a new video about?&quot; I should have said: &quot;JTAG!!!&quot; If only I&apos;d thought about it before. GREAT content, Robert. Thank you!!

  4

• BA

  @bartek153 · 5 years ago

  Another brilliant vid. I have used XJTAG recently in the exact manner David has sown here. Unfortunately I had to learn most of it on my own. I wish this vid had been done a few months ago :D <br>Cheers Rob

  1

• BO

  @bobby9568 · 5 years ago

  Yes, a great guest video!

  2

• MR

  @Mr_Deola · 4 years ago

  Very very informative. Thanks