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PROCESSOR-SDK-AM62X: Chip temperature drift issues

Part Number: PROCESSOR-SDK-AM62X

Tool/software:

Hi

During use, we obtained the temperature value of thermal_zone0 at 1S intervals and found that the temperature drift was large. There were no parameters related to the temperature sensor accuracy and temperature drift in the chip manual.

The device was placed at an ambient temperature of 25℃ and the stress test program was run.
stress-ng --cpu 4 --vm 4 --vm-bytes 64M --timeout 86400s &

Here are my questions:
1. Is this a normal phenomenon?
2. If it is not normal, how can I improve the accuracy?