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ETRA SOM/ETRA Hardware/Electrical Thermal and Mechanical Features/Thermal management and heat dissipation

300 bytes removed, 09:38, 31 December 2020
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<section begin="History" />
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<section end="History" /><section begin="Body" />
== Thermal management ==
DAVE Embedded Systems' team is available for any additional information, please contact [mailto:sales@dave.eu sales@dave.eu].
===Software thermal protection '''TBDTODO: le sezioni qui di seguito vanno documentate e completate in funzione delle funzionalità del SOC (iMX6, iMX6UL, Zynq, etc.) e della diposnibilità di sensori di temperatura a bordo del SOMverificare l'implementazione nel BSP''===
===Software In DESK-MP1-L, two software thermal protection mechanisms are implemented. Both are based on the processor''TBDs temperature sensor. It is worth remembering that maximum junction temperature (also denoted as Tj in the rest of the document) is: se applicabile'' ===
In DESK-ETRA-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*105°C for extended commercial and industrial parts
*125°C for automotive parts.
At U-Boot level, automatic boot procedure is halted until Tj is smaller than (following temperatures might seem excessively low but they take into account the intrinsic poor precision of the temperature sensor to provide a reasonable safe margin):
*80°C for commercial parts*90 for extended commercial and industrial parts
*110°C for automotive parts.
The default temperature thresholds depend on the silicon grade, as follows:
*for commercial parts** passive threshold: 85°C** critical threshold: 90°C*for extended commercial and industrial parts
** passive threshold: 95°C
** critical threshold: 100°C
** critical threshold: 120°C.
Practically speaking, for DESK-ETRAMP1-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:
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