Colibri T20 JTAG

We have a custom carrier board with a Colibri T20. We are trying to do the debugging with the JTAG interface. Checked the datasheet, which says need to contact the support to use the JTAG interface. Would you please provide document or help with the JTAG?

Thanks,

Quinn Huang

Noblis

Dear @quinn,
The easiest would be if you would use the Colibri Evaluation Board V3.x, as there the JTAG connections (the six round gold pads on the back of the module) are connected with pogo-pins to a normal ARM 20-pin JTAG pin header.
If your carrier board doesn’t support this (what I suppose), it won’t be possible to easily debug as you would have to connect to these gold pads on the module with your debugger device.
Why do you need JTAG debugging? What’s the original problem you see?

Dear Roman,
Over here we have the same task to connect a JTAG Debuger to a VF61 module in a custom base board. The only problem is the actual pinout of the six gold pads on the module. Is it possible to provide these here?
Best Regard,
Stefan

I had a look to the actual layout data of Colibri Evaluation Board and now the pinout turns out to be clear.

So if you look at the bottom side of the SoM module the pinout is:

(3) (4) (5)

(6) (1) (2)

with signal names:

  1. JTAG_TDI
  2. JTAG_TDO
  3. JTAG_TCK
  4. JTAG_TRST#
  5. JTAG_TMS
  6. TP11

Best Regards,
Stefan