JTAG laid out incorrectly - Unusable

I know you have something like 800 of these boards being assembled but I thought I would give you a heads up. Whatever part you used for the JTAG header component in EAGLE…the even and odd pins are completely swapped. So basically when you connect the ribbon cable from the JTAG emulator, in this case the IJET, it grounds the reset line which you have connected to pin 9. I could be wrong, but I dont think so…The MIPI 10 standard from ARM should have all the odd pins from 1-9 on the left and the even pins 2-10 on the right column

Give this a try. :wink:

Huh, the image you attached isn’t coming through. I think I see where you are going…I must have been wrong assuming to solder it on top of the board. I guess I should have solder it to the underside. Why thank you

Tried de-soldering the 1.27mm through hole header. Thats a no go…always found it more difficult to de-solder through hole, especially the fine pitch through hole. I’ll just pick up another board as they’re pretty cheap. You may want to add that as a note to the getting started guide, because it’s no very apparent other than a small bar on the silkscreen. I think most people will probably do what I did and solder it to the top of the board without verifying the board layout file first. Technically it was my fault, but it wouldn’t hurt to add a note in the user guide. Thank you again for pointing that out . :slight_smile:

Try removing the plastic from the header and then heat the pins one at a time and use a needlenose to pluck the pin. You may need to add some more solder to let the pin come out without pulling the barrel out of the hole. Then use solder wick or a solder sucker to clean the holes.

/mike

@cflournoy, thanks for the suggestion to add this to the guide. I have placed a short section about the JTAG connector, as well as a (hopefully) very visible alert about it being accessed from the bottom side, to the [Edge Hookup Guide Hardware Overview section. Sorry for the confusion and I hope you manage to get those pins out without too much trouble!](https://learn.sparkfun.com/tutorials/sparkfun-edge-hookup-guide#hardware-overview)

Hello Liquid Solder. Thank you for adding this. Like I said earlier, that was definitely my fault. I should have trusted the silkscreen and not assumed it would be soldered to the top of the board but it definitely doesn’t hurt to make others aware of that. :slight_smile:

Just an update. Soldered the JTAG on this board and got it up and running on the IAR tools. Thank goodness because I really did not want to use gcc or make