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Identify JTAG pins

Started by Gregory Dudek March 4, 2006
I have a microprocess device I would like to patch.  It has some headers
and I know one of them is JTAG, but I can't figure out
which nor which pins have which JTAG lines (TRST, etc).
Does anybody have some suggestions re. how to identify the
JTAG pins, perhaps using a scope and a multimeter?
Gregory Dudek wrote:
> I have a microprocess device I would like to patch. It has some headers > and I know one of them is JTAG, but I can't figure out > which nor which pins have which JTAG lines (TRST, etc). > Does anybody have some suggestions re. how to identify the > JTAG pins, perhaps using a scope and a multimeter?
do you know which processor is on the board? which kind of header do you have ? (20pin 14pin 10pin ...) Then please try to find a corresponding connector in our doc : http://www.amontec.com/pub/amt_ann003.pdf This Application Note resumes the Common JTAG interface pinouts used by the most popular manufacturers of processors, FPGAs or CPLDs devices as ARM, Altera, Lattice, MIPS, Xilinx and so more Regards, Laurent www.amontec.com

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