STM32WB55 - STOP2 and current consumption

[polotomino]

I'm working on both custom board and P-NUCLEO-WB55. Trying to reach the lowest power consumption as possible I just detected that the measured current in STOP2 is around 50uA (BLE off and RTC ON) instead ~2uA. The result is comparable between boards, and I'm using the PWR_STOP2_RTC example. I uploaded CubeMX and the HAL MCU package to the lastest version, but nothing changed.

any advice?

Thanks

[chinmaydixit]

Hello,

As you are using STM32WB55, It has 2 CPUs , So by setting LL_C2_PWR_SetPowerMode(LL_PWR_MODE_SHUTDOWN); you can put CPU2 into shutdown mode or your desired mode to lower the power consumption.