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===Software thermal protection ===
In [[AXEL_Lite_SOM/DESK-MX6-L | XELKDESK-MX6-L]], two software thermal protection mechanisms are implemented. Both are based on the processor's temperature sensor. It is worth remembering that maximum junction temperature (also denoted as Tj in the rest of the document) is:
*95°C for commercial parts
** critical threshold: 120°C.
Practically speaking, for [[AXEL_Lite_SOM/DESK-MX6-L | XELKDESK-MX6-L]] this mechanism makes use of two different thresholds, denoted as <code>trip_point0</code> (also known as ''passive threshold'') and <code>trip_point1</code> (also known as ''critical threshold''.
When Tj reaches <code>trip_point0</code>, Linux kernel scales down processor frequency: