We are using an STM32U073CCT6 on a battery-powered board. We need to put the processor in low-power mode to increase battery life. The current in STOP MODE 2 is about 20uA. To address some issue related to the power supply and our hardware, we put the processor in Shutdown Mode and obtained a current of 2uA. How could we reduce the consumption in STOP2 mode? We have already deinitialized all peripherals before entering stop mode 2.
It is not for sure. It use the RTC for wake up 30 seconds. I have managed to get some further reduction in power consuption placing the GPIO in analog mode.
