We have been having problems starting up the PicoCoreMX8MM on some devices for some time. As it looks at the moment, the peripherals are not initialized properly and the Linux crashes near when initializing the SDHCI (see bootlog in the attachment). Since the PicoCoreMX8MM only needs 5V and generates the 3.3V itself I have the question how it looks like with the 3.3V supply of the external peripherals.
Are there any specifications regarding the power-on sequence between 5V and external generated 3.3V? The circuit of the power supply was largely taken from the PicoCoreBBDSI (see figure below).
Many thanks for your answer.