S32K148 EVK Microcontroller Heat up (Spoiled)

[Learner]

Hi Experts,

Trying to analyse the root cause of S32K148 microcontroller spoiled.

Background: 

1. I am trying to establish the SPI communication in between two EVK boards (S32K118 & S32K148). Both the boards were working fine but by mistake when i uploaded the S32K118 files in S32K148 suddenly microcontroller start heating and then after i was not able to flash.

2. I am using 5V domain powered by 12V power source (J8 connected to pin 1&2)

3. Total 6 pins are connected in-between S32K118 and S32K148 i.e. MISO,MOSI,PS0, SCLK, PTC11(GPIO configured as interrupt) & a ground to wire to make common ground in between two EVK.

4. Except configured pins wire none of the wire(or any conductive material was in physical contact with the  EVK. Means no shorting has been happened.

5. S32K118 still working fine but S32K148 microcontroller showing shorted.

This is my 2nd EVK whose microcontroller spoiled due to same reason.

Please suggest the possible reason and work around of this problem.

Thanks in advance.

[lukaszadrapa]

Hi,

the boards are different, so I would check which pins are configured on S32K118 and compare it with schematic of S32K148 board. There could be some collision with transceivers, for example.

Otherwise I can't see workaround for that - just try to avoid such mistake.

Regards,

Lukas