EEVblog #499 - What is JTAG and Boundary Scan?

Id love to se more whiteboard presentations like this

Keep up the great work, sir!

Arvilla Ways

Arnaldo Harbor

Jaime Village

Brown Shoal

Blick Corners

Mafalda Vista

Mariah Cliffs

225 Grimes Point

773 Ricky Run

Jacobson Parks

340 Stracke Mountains

Melyssa Shores

Liliane Dale

Lance Mountain

4991 Heaney Crescent

Paolo Meadows

24856 Little Lakes

Cartwright Inlet

Quigley Lake

9256 Sincere Roads

760 Collin Trace

16342 Kunze Pine

Murray Manors

0366 Myles Parkway

Doyle Lodge

Great! Thank you!👍👍👍

Have no idea JTAG can be this powerful

This video is just amazing! Thank you so much for the detailed demonstration.

"In the face" I loved it!

Is it possible to build a JTAG hardware from scratch? Is JTAG hardware the ideal for testing microcontrollers?

We now need a video about IEEE Std 1149.7 which is only a 2-wire interface.

입거있는 티셔츠 너무 멋져요.. 한국어 번역좀 달아주세요^^

Used to work with JTAG and Boundary Scan.
Went on a course in the Netherlands with Eindhoven.

Amazing, thank you so much for this!

Thought JTAG was difficult
But you forced me to change my mind.
Thank you very much

I have one doubt, can we access every flop data in fpga through jtag ?

oh i am 100% playing with this in my next project
this is so cool

Possibilities!

You probably dont have time to read comments but you inspired me many years ago. I used to watch your videos knowing very little about this stuff. Today I'm repairing boards of all natures, doing trace repairs, and I've recently had to repair a completely snapped board. I was a software hacker, and hardware just seemed like the ultimate way to control and manipulate hardware. During my time hardware hacking I invested in a good stereo microscope, oscilloscope and rework station. I had all the tools to do repairs, so now I do that because it's good money, more fun, and beats my old programming career. Thank you :D

What is the correct pronunciation of the word "data"? I thought it is "dei-tah", but often heat the "dah-tah". (you could probably notice that I'm not a native speaker this is why I ask to).

Very nice and exciting. Thanks.

Found it in 2022. This is an amazingly clear explanation! Thank you so much. Really helps one understand what the heck JTAG is.

excellent.. thanks for video

Hi, amazing job with this!
Looks like this one is not on the excellent "fundamentals friday" playlist. Am I missing something?

Excellent explanation of 1149.1 Boundary Scan, but if the green rectangles represent your I/O driver & receiver ckts, then I would have drawn the the green rectangles outside of the blue ones. The output test data is fed into the drivers by scanning it into the boundary scan latches and then driven off-chip. The receivers conversely receive input test data from off-chip and feed it into the boundary scan latches, where it is captured and scanned out. As drawn, this diagram implies that latching occurs between I/O ckts and the physical chip pin.

Im here trying to understand what the JTAG port is after watching several vids of people yanking them from boards because they seem to cause serious issues on Apple MacBook Air's. Seems they are place too close to mother board edges and susceptible to water damage causing the system to lose its 3 volt feed in some cases

In pub Stm32f103rbt6 ic, near give 6 pin.
Now how to read by 6100n programber.
Need give supply pcb?
Its damage programber??
Sir Please guide

You got to love the enthousiasm !!! Love the content.

He pronounces it JTECH instead of pronouncing it JTAG