Not able to connect with MKE15Z using J-Link

arun07 — Mon, 02 Nov 2020 14:37:00 GMT

Hi All,

I am new to NXP and Cortex based Micro-controllers, and working on a project.
Everything was working fine, but I think I messed up a setting in the project and due to which I am not able to connect with my board.

The board is based on the MKE15Z256VLH7 micro-controller. It was working fine without any problem but suddenly after some changes in the code, it stopped working.

I am not sure, but it looks like that I accidentally change the Pin Mux associated with the RESET pin.

By Default PTA5 is RESET_b and I changed it to ALT_0 (As per datasheet, nothing is present on this setting), by mistake, this is done.

Is there, anyway, I can program and debug my board again.

I tried to connect using J-Link commander, the following is the scenario I am getting.


SEGGER J-Link Commander V6.54c (Compiled Nov 7 2019 17:01:56)
DLL version V6.54c, compiled Nov 7 2019 17:01:02
Connecting to J-Link via USB...O.K.
Firmware: J-Link V9 compiled May 17 2019 09:50:41
Hardware version: V9.30
S/N: XXXXXXX
License(s): GDB
VTref=4.616V

Type "connect" to establish a target connection, '?' for help
J-Link>connect
Please specify device / core. <Default>: MKE15Z256XXX7
Type '?' for selection dialog
Device>MKE15Z256XXX7
Please specify target interface:
 J) JTAG (Default)
 S) SWD
 T) cJTAG
TIF>S
Specify target interface speed [kHz]. <Default>: 4000 kHz
Speed>1000
Device "MKE15Z256XXX7" selected.

Connecting to target via SWD
InitTarget()
Connect Under Reset
Communication error while accessing MDM-AP.
Connect Under Reset
InitTarget()
Connect Under Reset
Communication error while accessing MDM-AP.
Connect Under Reset
****** Error: InitTarget(): PCode returned with error code -1
InitTarget()
Connect Under Reset
Communication error while accessing MDM-AP.
Connect Under Reset
InitTarget()
Connect Under Reset
Communication error while accessing MDM-AP.
Connect Under Reset
****** Error: InitTarget(): PCode returned with error code -1
Cannot connect to target.
J-Link>

I even tried with MKE15Z256XXX7 (ALLOW SECURITY), but still, it didn't connect.

With IAR I am getting this error now. (As I am not able to connect)

Some few additional points:

* RESET pin is pulled high in hardware using 10k resistor.

* I already tried a basic/simple program, to turn on the led, and I have the same problem now with all projects.

Please let me know if some more information is required from my side.

Reset Circuit is as below.

Please suggest.

Thanks in advance.

Re: Not able to connect with MKE15Z using J-Link

Omar_Anguiano — Fri, 03 Apr 2020 21:07:19 GMT

Hello xpress-embedo

It seems that your kinetis is blocked, I suggest you refer to this post Communication error while accessing MDM-AP. in order to unlock your micro.

Please let me know if the suggestion is helpful,

Best regards,

Omar

topic Re: Not able to connect with MKE15Z using J-Link in Kinetis Microcontrollers

Not able to connect with MKE15Z using J-Link

Re: Not able to connect with MKE15Z using J-Link