jtag port is broken

aberracasa · ‎2005-02-08

Posted on February 08, 2005 at 10:12

jtag port is broken

aberracasa · ‎2011-05-17

Posted on May 17, 2011 at 12:05

I have developped in-system jtag programming capability from svf file. I have now mangaged to break 3 uPSD3234BV probably by incorrect programming (PSDSoft can no longer connect to device). Can you give some suggestions as to how I was able to accomplish such a feat?

Thank you.

jdaniel · ‎2011-05-17

Posted on May 17, 2011 at 12:05

aberracasa,

I have seen this happen with very tight infinite loops in the code. The best way to fix it is to keep resetting the chip and then immediately executing an ''erase all'' command with the JTAG programmer. The few times I've had this problem I found that I could eventually get it to erase the chip. Then, of course, I had to find the problem with the code before reprogramming it.

I've yet to see a good response from ST on this, so I think they don't believe it's a problem or don't know how to solve it. Wish I had better advice, but I think that's about the only way that will work.