Monitor supply voltages on Apalis IMX6

Technical Support
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1

Hello,

Is there a way to monitor the supply voltages from the imx6 on the Apalis board? I would like to determine during operation whether all voltages are within the target range. I already monitor the externally applied 3.3V. However, I would like to monitor whether and how the internal voltages behave when there are (temporary) voltage dips or the supply voltage is at the limit of 3.1V

My setup:
own carrier board
Apalis iMX6Q 1GB V1.1Y
BSP 5.7.6

Best regards,
Andreas

2

Hi, I’m the Toradex AI Assistant. The Toradex Support team will follow up with you shortly!

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Hello Andreas,

To monitor the internal supply voltages on your Apalis iMX6 module, you can consider the following software and system configuration approaches:

  1. On-Board Sensors: Check if your Apalis iMX6 module or custom carrier board includes built-in voltage monitoring sensors. Some modules have integrated power management ICs that can provide voltage readings through interfaces like I2C. You can access these readings using appropriate software tools or libraries.

  2. External ADCs: If built-in monitoring is unavailable, consider using an external Analog-to-Digital Converter (ADC) connected via I2C, SPI, or another interface. This setup allows you to measure internal voltages by connecting the ADC to relevant test points or voltage rails. Ensure you have the necessary drivers and software to read and interpret the data from the ADC.

  3. Software Tools: Utilize available software tools and libraries that can interface with your hardware to read voltage levels. This might involve using existing drivers or developing custom scripts to monitor and log voltage data.

When implementing these solutions, ensure they do not interfere with the normal operation of the module and comply with the electrical specifications of the Apalis iMX6. Reviewing the Apalis iMX6 datasheet and technical resources can provide additional insights into the available interfaces and monitoring capabilities.

I hope this helps you effectively monitor the internal voltages on your setup.

Best regards,
Toradex AI Assistant

Please, also check if these links can help you solve your problem:

System gets stuck while rebooting (and watchdog fails).

3

Hello,

my question was aimed at finding out whether there are on-board sensors for the supply voltages on the apalis imx6 and if so, how I can read them out.

Best regards,
Andreas

4

Hi @aweger, sorry for the late reply.

There is no on-board voltage/current on the Apalis i.MX6 SoM.

Sorry, but what do you mean by “externally applied 3.3V” and “internal voltages”?
External = directly from your power supply?
You need to know the voltages inside the SoM or the voltages applied to the SoM terminals pads?

In any case, you would need an external power measurement device for this.
Maybe have it integrated to your carrier board?

5

Hi @allan.tx

Thanks for your reply. I meant it exactly as you described it. The 3.3V from my power supply is designed so that I can monitor it. I wanted to know if the power supplies inside the SoM are also monitored.

Many thanks for your support.

6

Hi @aweger

Well… there is no on-board sensor that monitors the each of the pins’ voltages, you need to measure it with an external equipment.

The apalis evaluation board actually exposes all the SoM pads in an easily accessible way, so you can measure it.

7

Hi @allan.tx

Thank you very much for your answer and help.