Imx8mmevk Thermal Critical Temperature shutdown

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Imx8mmevk Thermal Critical Temperature shutdown

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santhosh2
Contributor IV

Hello,

we have designed a customized board with imx8mmevk processor and we are testing for thermal shock test from -40 degree C to +85 degree C (Dwell Time is 2 hrs and ramp time is 1 to 3 minute). Under this the processor is shutting it self between +75 degree C to +85 degree C. Please find the attached log

85 degree 23_Jan2021_procecssortrace_1.jpg

how to ensure that the processor doesnt shutdown when this is reaching at 85 degree C

 

Regards

santhosh

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3 Replies

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b36401
NXP TechSupport
NXP TechSupport

You can configure shutdown temperature in Linux.
Please refer to chapter 2.9 "Thermal" of i.MX Linux Reference Manual.

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santhosh2
Contributor IV

Yes I changed as per the settings but the processor CPU temperature is reaching 100 degree C when the environmental chamber temperature is 75 Deg C

cat /sys/devices/virtual/thermal/thermal_zone0/temp 

Used the above command to get the CPU temperature

 

Regards

Santhosh

 

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b36401
NXP TechSupport
NXP TechSupport

Please look at the patch in this thread:

https://community.nxp.com/t5/i-MX-Processors/i-mx8mm-cpureq-cooling-issue/m-p/1176540

Maybe it helps.

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