Bureaucrats, dave_user, Administrators
8,226
edits
Changes
no edit summary
! colspan="4" style="width:100%; text-align:left" ; border-bottom:solid 2px #ededed" |History
|-
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Issue Date
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#73B2C7; padding:5px; color:white" |Notes
|-
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |1.0.0{{oldid| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" 12837|Feb 2021/01/29}}
| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |First release
|-
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |2021/12/03
! style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#ededed; padding:5px; color:#000000" |Add temperature thresholds information
|-
|}
===Software thermal protection ===
In [[DESK-MX8MX8M-L| DESK-MX8M-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 Consumer parts
====U-Boot====
At U-Boot level, automatic boot procedure is halted until Tj is smaller greater 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):
*'''TBD''' 85°C for Consumer parts
*95°C for Industrial parts
====Linux kernel====
At Linux level, a more sophisticated protection mechanism is implemented. Please refer to the following sections for more details.
*for Consumer parts
** passive threshold: '''TBD'''85°C** critical threshold: '''TBD'''90°C{| style="color:#000000; border:solid 2px #73B2C7; background-color:#ededed;font-size:95%; vertical-align:middle;"|[[File:TBD.png|30px]]|'''Section not completed yet'''|}
*for Industrial parts
** passive threshold: 85°C95°C** critical threshold: 95°C100°C
**
thermal thermal_zone0: critical temperature reached(95 C),shutting down
</pre>
To resume the CPU from the shutdown, the CPU_ONOFF signal must be externally managed. Please contact [mailto:sales@dave.eu sales@dave.eu] for any additional information.
By default, temperature thresholds are set up as follows: