topic Problems debugging FRDM-K66F with Seeger J-Link Plus in Kinetis Microcontrollers

Problems debugging FRDM-K66F with Seeger J-Link Plus

ChristofAbt — Thu, 27 Mar 2025 09:03:40 GMT

Good morning,

I want to use the Seeger J-Link plus to debug the MK66FN2M8VMD18 on my FRDM-K66F evaluation board via the SWD debug interface. This interface consists of two signals SWDIO and SWCLK. Unfortunately your wording used in the schematic SPF-28682_REV B.pdf does not correspond to the standard. There are the signals SWD_SDA_TGTMCU, TRACE_SWO, JTAG_TDO/TRACE_SWO/EZP_DO/FTM0_CH7. Which of these signals correspond to the standard SWD signals. I attached the error report additionally. An experienced user could probably detect the fault.

Re: Problems debugging FRDM-K66F with Seeger J-Link Plus

Habib_MS — Fri, 28 Mar 2025 22:12:49 GMT

Hello @ChristofAbt,
PTA0 and PTA3 corresponds to SWD standard signals:

And are used in the SDW connector:

These are designed to support JTAG and SWD, also, as mentioned in the chapter 3.2 called "Series and debug adapter (OpenSDAv2.1)" in the Freedom FRDM-K66F Development Platform User’s Guide. These signals are also brought out to a standard 10-pin (0.05”) Cortex Debug connector (J9). I highly recommend see this chapter in order to obtain more information.
BR
Habib

Re: Problems debugging FRDM-K66F with Seeger J-Link Plus

ChristofAbt — Mon, 31 Mar 2025 09:54:20 GMT

Thanks for the quick reply but please use the naming standards in your schematics.

Best regards Christof

Re: Problems debugging FRDM-K66F with Seeger J-Link Plus

Habib_MS — Mon, 31 Mar 2025 21:44:09 GMT

Hello again @ChristofAbt,

Thank you for the feedback, I will share the comments to the hardware design team. So, they can deliberate about the addition of this on a future.

BR
Habib.