Problem with the Power on reset

[fernandogarcia]

Hi, I have a problem with the Power on reset. I am using MK26FN2M0VLQ18 in LQFP 144. 
The problem is when the power is disconnected and reconnected, sometimes the microcontroller
 does not start, it stays in a state that I do not know. This case only occurs when I 
disconnect and the voltage is 1.6-1.7 and I connect power quickly. I think it has to be a 
problem with the microcontroller reset. The power is 3.3V. 
I can reproduce the error because we have a backup battery, when the battery is between 
1.6-1.7V we connect power and sometimes the microcontroller does not start. 
I am using Kinetis Design Studio 3 IDE, KSDK 1.3.0 and Processor Expert Software. 
I have activated the LVD 

What happens?

[ErichStyger · Accepted solution]

Maybe the K26 stays in the EZPort mode which usually is the default?

Check Disabling EzPort on NXP Kinetis to Solve Power-On Issues | MCU on Eclipse 

I hope this helps,

Erich

[fernandogarcia]

thanks Erich. It seems that what you say is the problem. I have not managed to block it anymore.