topic Re: Temperature sensor on LS1043ARDB in Layerscape

Temperature sensor on LS1043ARDB

ts1234 — Mon, 14 Dec 2020 07:35:56 GMT

Is there any temperature sensor available on LS1043ARDB?

Re: Temperature sensor on LS1043ARDB

ufedor — Mon, 14 Dec 2020 16:37:53 GMT

Please refer to the QorIQ LS1043A Reference Design Board Reference Manual, 4.4 Temperature anode and cathode:

"The LS1043ARDB has two pins, TD1_Anode and TD1_Cathode. These pins are connected to a thermal body diode on the die that allows direct temperature measurement. The pins are connected to an SA56004ED device (U45) with dual-channel thermal monitor. This allows you to take direct die temperature readings with an accuracy of ±1 °C."

Re: Temperature sensor on LS1043ARDB

ts1234 — Mon, 14 Dec 2020 18:14:29 GMT

I have tried lm-sensors to check the temperature. No external device is connected to LS1043ARDB.

Why do I see a high value on temp2?

root@localhost:~# sensors
adt7461-i2c-0-4c
Adapter: 2180000.i2c
temp1: +59.0 C (low = +0.0 C, high = +70.0 C)
(crit = +85.0 C, hyst = +75.0 C)
temp2: +76.1 C (low = +0.0 C, high = +70.0 C) ALARM (HIGH)
(crit = +85.0 C, hyst = +75.0 C)

root@localhost:~#