On a stm32u5, the SPI3 is in the SmartRun domain, which is designed to work down to STOP2 in autonomous peripheral mode with LPDMA.
I'm now wondering if it is also possible to use SPI3 in autonomous mode with GPDMA but only to STOP1? Or do I need to use LPDMA to use SPI3 in autonomous mode regardless of the chosen stop mode?
