Thermal Zone

Thermal management is necessary to ensure proper operation of the phyCORE-AM62Ax SOM, especially when integrated inside of an enclosure as the AM62Ax processor generates considerable heat. The phyCORE-AM62Ax has a temperature rating of -40C to 85C. This guide will show you how to read the junction temperature of the processor on the phyCORE-AM62Ax SOM. To learn more information about the phyCORE-AM62Ax thermal management, please see section 4.9 in the Hardware Manual.

Reading the Temperature

The phyCORE-AM62Ax processor has 1 physical location (thermal zone) where the temperature can be monitored. The available zone can be accessed in the Linux directory /sys/class/thermal/thermal_zone0.

To output the temperature of thermal zone 0 run the following command:

Target (Linux)

cat /sys/class/thermal/thermal_zone0/temp

Expected Output

This output translates to 53.47C

Temperature Trip Points

To view the type of trip points and the trip point temperatures of thermal zone 0 run the following command:

Target (Linux)

cat /sys/class/thermal/thermal_zone0/trip_point*

Expected Output

2000
105000
critical

The critical trip point which will cause the system to shutdown will be reached when the temperature reaches 105C and will turn off when the temperature reaches 103C.