I am using i.MX7 dual.
CPU was transitioned from RUN mode to Low power mode.
CPU normally wakes up from low power mode by an external interrupt.
However, in rare cases, we have confirmed that CPU cannot return from Low power mode.
I would like to find the cause of the inability to return to normal, and take measures to enable normal return.
Please tell me about the possible factors in the case where recovery from Low power mode is not possible.
There was a description in the manual that it is operating with the RTC clock in low power mode.
I'm running the RTC with an external 32kHz crystal.
The CPU has an internal 40KHz RingOSC, and even if the 32k external crystal stops for some reason, it will automatically switch.
So I think that CPU can be recovery form Lowpower mode.
Just in case, I would like to confirm, but is there a way to externally determine which of the CPU's RTC clocks is running?
