Information about temperature calibration

[sebastiansuesen]

Hello,

I want to calibrate the thermal sensor for the imx8mm. I read the i.MX 8M Mini Applications Processor
Reference Manual chapter 5.4 Thermal Monitoring Unit (TMU).

I can't find information about the calibration register for the TE1/TE2 value. All the information I found in the chapter are 8-bit data stored in OTP cells. How is the name of the register?

Do you have an application note, which described the temperature calibration on production test?

I ask because we have our own customer board and want to calibrate the thermal sensor.

[sebastiansuesen]

Do you know, if I have to calibrate the thermal sensor?

I ask because we get only an imx8mm SOC not a board with the SOC. Do I have to calibrate the SOC or is the SOC calibrated?

[Bio_TICFSL · Accepted solution]

Hi, It came calibrated, but Thermal driver is a necessary driver for monitoring and protecting the SoC. The thermal
driver will monitor the SoC temperature in a certain frequency.

Regards

[Bio_TICFSL]

Hello Sebastian,

Seems details can be found only in sources of thermal drivers described in

sect.2.9.3 Source Code Structure of the  Linux reference Manual of the BSP.

Regards