Which pins do I need to have on my 10pin debug port

therealfreegeek · ‎05-19-2016

The KQRUG shows that PA0 through PA3 are needed as well as reset, but I have also seen schematics using only PA0, PA3 and reset.

Can anyone say what I should use for a K26 board and are there any differences in debug capability with more or less pins?

Thanks

Jim

Robin_Shen · ‎05-20-2016

Hello,

This MCU supports SWD and JTAG debug interfaces. SWD needs only DIO and CLK lines while JTAG needs TMS, TCLK, TDO, TDI and RESET_b lines.

I recommend you to take a look into this document from ARM where the differences between SWD and JTAG are explained.

Best Regards,

Robin

therealfreegeek · ‎05-20-2016

Hi Robin,

Thanks for the link, in the image below you can see that I have selected SWD mode in the CPU component but it seems to also suggest to use the TRACE_SWO line on PTA2. Can you explain what this is and why it should be used?

Robin_Shen · ‎05-24-2016

Hi,

You can also read the 11.2.3. Serial Wire Output format if you want to use this function.

Best Regards,

Robin