Am62A low power modes

Thanks a lot !

Hello Mickael LE STEPHAN,

Thank you, have a nice day.

Regards,

Lavanya M R.

Hello all,
Does there has some code example for lowPower mode in the SDK (i didn't find anythings) ?

Hello Mickael LE STEPHAN,

Thank you for checking. 

Let me check and update you.

Regards,

Sreenivasa

Ok thank you. Looking to your answer

Hello Mickael LE STEPHAN,

Thank you.

Will check internally and update you.

Regards,

Sreenivasa

Hi Mickael,

The current AM62Ax SDK doesn't support Low Power mode yet. The SW Dev team is working on implementing it.

Hi Bin, disappointed to hear that! Do you have any idea when it will be available please?

Hi Michael,

The schedule is currently under discussion, but targeted to Processor SDK9.1 which would be released by end of October.

Oh very long delay for a lowpower eval kit ... not a good news. We order this card to test lowPower (like it write on the package) for a camera project !

Hello Bin Liu,

Is it possible to have a simple example that put the A53 in lowPower mode from MCU using mailbox and a timer to wake up the A53 after a period ?

Hi Michael,

It is not just an example code, LPM also requires the collaboration from DM firmware, which is not available for public yet.

Mickael LE STEPHAN said:

that put the A53 in lowPower mode from MCU using mailbox a

As far as I know, the MCU-only LPM is initiated from Linux running on A53s, not from the MCU.

Hi Bin Liu, thank you.
Otherwise, is it possible to put the A53 in lowPower mode from linux ? And wake-up it from linux also ?

Hi Michael,

Yes, LPM (Deepsleep or MCU-only mode) can be initiated from Linux and waken up from Linux.

Ok, does there is an example or need to wait the new sdk ?

Hi Michael,

Here is how DeepSleep LPM works on AM62x, but if you want run it on AM62Ax, you would have to wait for SDK9.1.

https://software-dl.ti.com/processor-sdk-linux/esd/AM62X/08_06_00_42/exports/docs/linux/How_to_Guides/Target/How_to_suspend_to_ram_on_AM62x.html

Ok thank you for the link.
In the documentation, the average power consumption at full load is 2W.

On the eval board SK-AM62A-LP, i'm at 3W without inference and 3.7W with inference (at usb C power connector).
How i can reduce this consumption ?

Hi Michael,

This question seems diverging from the original question. Can you please post it in a new e2e thread so that our Power expert can comment?

My suspicion is that the 2W number is consumed by AM62A device itself, but you are measuring 3.7W for the entire board.

ok i understand. No problem