So, many of you use JTAG?
I’ve been using JTAG for many years now, which started with FPGAs, and has mostly been for CPLDs and FPGAs since- but it’s also a pretty widely used protocol for programming and debugging mid range microcontrollers all the way up to high end CPUs. I’ve always wanted to look into how JTAG worked in more depth, but never really had the time.
Now, I do have some time (and some projects which depend on JTAG hacking) – so this post will go into the world of JTAG. (more…)