Kinetis Design StudioのトピックRe: TWR-K64F120M and Segger J-Link Probe

TWR-K64F120M and Segger J-Link Probe

intractablesubt — Thu, 04 Sep 2014 22:12:23 GMT

I have a TWR-K64F120M board. I can use the OpenSDA connection with the Segger software and everything works fine. When I try to use the on board JTAG connector (J5) with my J-Link probe it fails complaining about the target voltage being too low. I'm powering the board using the OpenSDA mini-USB. Both the OpenSDA and the J-Link probe show up in the device list when I start the J-Link GDB server.

As a sanity check I tried this same set up with a TWR-K21F120M board and it also works fine. I don't know if it means anything but the board was shipped with a plastic clip over the JTAG connector.

Re: TWR-K64F120M and Segger J-Link Probe

BlackNight — Fri, 05 Sep 2014 07:51:29 GMT

Check the jumper settings (J32, J39), see http://mcuoneclipse.com/2014/03/02/first-steps-with-the-freescale-twr-k64f120m/

I hope this helps,

Erich

Re: TWR-K64F120M and Segger J-Link Probe

intractablesubt — Fri, 05 Sep 2014 17:57:34 GMT

Thanks Erich,

J39 was the key. Off for Segger, On for OpenSDA.