How to unbrick S32k144 using PEmicro

[parveez]

Hi, 

I am trying to unbrick my S32K144 Eval board. I have followed the steps described here: https://mcuoneclipse.com/2013/06/16/bricking-and-recovering-frdm-kl25z-boards-reset-swd-clock-and-lo...

Even after doing power cycling for more than 100 times I was unsuccessful. 

I am not sure what must be the problem with my board but I am unable to download code on the board. Only the green light is on when Powered up and U11 chip on board heats up. 

Is there a way I can fix this?

[danielmartynek]

Hi,

It seems like the U11 chip is damaged and you cannot power the MCU from the USB.

Please measure the MCU power supply VDD_MCU.

You can try switching to 12V, J107.2-3

You can try an external debugger unless of course the S32K144 MCU is damaged as well.

Regards,

Daniel

[parveez]

Hi @danielmartynek 

Is it possible to replace the U11 chip? 

This occurred on other S32k144 board when MC33772B was connected. Not sure what is the issue. I tried external debugger. But I am not able to halt processor. If I am using Model based design, how can I program the MCU using external debugger? 

Since, it has happened on two boards, I am looking for a solution and reasons for what is causing this.

For the first time, I had connected relays and was testing relay switching when this happened. That boar never recovered. On the second board, I had MC33772 EVB connected and it was working fine before this occurred. Now I am not even able to power up the second board with 12V. 

Thanks.

[danielmartynek]

Hi,

It is hard to say, if just the U11 power switch was damaged, you could replace it.

The 5V power supply (P5V_SBC) from the 12V input is generated by the UJA1169 SBC.

So if P5V_SBC is not generated, then either the SBC is damaged as well or there is a short on P5V_SBC probably in the S32K1 MCU.

Regarding MBDT, please post it here: https://community.nxp.com/t5/NXP-Model-Based-Design-Tools/ct-p/mbdt

Thank you,

BR, Daniel