topic RT1170 Thermal problem reboot in i.MX RT Crossover MCUs

RT1170 Thermal problem reboot

LucaFerrario1978 — Tue, 15 Mar 2022 08:59:19 GMT

Hello,

I have a thermal problem with RT1170, the system work fine at 80°C, but when I turn off the system and then turn It ON, the RT1170 dosen't start anymore.

When the temperature will drop under 65 °C the system starts without a problem, the problem is the same in debug mode: I can't reset and restart the RT at high temperature.

There is a safety mechanism that prevent the RT from start?

Regards

Re: RT1170 Thermal problem reboot

LucaFerrario1978 — Wed, 16 Mar 2022 07:55:35 GMT

I have the same problem even with the RT1170 demo board from NXP! I used the "Cranck_storyboard_helloworld" project and the system dosen't reboot if I heat up the board.

I found that the system, during the reboot, stops before the main is launched with a BusFault exception. I think the system at higher temperature has a communication problem with the flash in the boot phase.... For example the SPI CLK is very bad during the boot phase, and seems fine instead when the main() starts... I thinks thats why the system works fine at high temperature but It can't reboot.

Is it possible to change the flash parameter during the boot phase, maybe with something similar to the eFuse?

Regards

Re: RT1170 Thermal problem reboot

jeremyzhou — Fri, 18 Mar 2022 01:50:38 GMT

Hi,
Thank you for your interest in NXP Semiconductor products and for the opportunity to serve you.
1) Is it possible to change the flash parameter during the boot phase, maybe with something similar to the eFuse?
-- No, I'm afraid not. Did you replicate the same phenomenon on the MIMXRT1170 EVK board?
Moreover, did you use the oscilloscope to verify the 24 MHz crystal oscillator already boot-up?
Have a great day,
TIC

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