Revision and Notes
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To better understand how things work, you can read section 2.7 - Thermal of the i.MX Reference Manual .
Maximum and Minimum Temperatures by SoMs
The maximum frequency to be used depends on the SoC present in the module, see the table below:
Module | Minimum Temperature (°C) | Maximum Temperature (°C) |
|---|---|---|
i.mx6 (Industrial) | -40 | 105 |
i.mx6 (Commercial) | 0 | 95 |
i.mx8m (Industrial) | -40 | 85 |
i.mx8m (Commercial) | 0 | 70 |
i.MX6 Based Modules
The i.MX6 provides a temperature reading of the SoC's internal temperature plus the board temperature is available via ADC/touch chip albeit with much worse accuracy. The output is in millidegrees Celsius aka 1000ths of degrees Celsius. Therefore it must be divided by 1000 to obtain regular degrees.
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| Code Block |
|---|
# echo 90000 > /sys/class/thermal/thermal_zone0/trip_point_1_temperature |
Note:
Modifying the temperature is not necessary for i.mx6 as the driver checks the temperature grade and adapts temperatures automatically.
Maximum and Minimum Temperatures by SoMs
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Module
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Minimum Temperature (°C)
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Maximum Temperature (°C)
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.
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-40
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105
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i.mx6 (Commercial)
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0
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95
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i.mx8m (Industrial)
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-40
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85
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i.mx8m (Commercial)
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0
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