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Reset and accessing MDM-AP error, debugging KW41Z with an external J-link Base tool

Question asked by DIEGO COMIN on Jun 11, 2018
Latest reply on Jun 18, 2018 by Gerardo Rodríguez


I have a Rigado Module R41Z (based on KW41Z) solded in a custom board. I want to debug it with an external J-Link debugger via SWD, but all the time im getting this response from J-Link software as well from Kinetis Design Studio IDE, when I try to debug it with a custom program:

The schematic from SWD and the R41Z module is the following:

The module is powered by 2.6V, can be the low power the cause of this error? 

It is the reset button connection the error?

With this J-Link tool I am able to program KW41Z Eval module without problem, I do not program them with Open-SDA firmware, so I hope the J-Link debugger are not the cause of the problem.


I would appreciate a solution of this problem, I can not program my board if I do not fix it.


Diego C.