Hello, I am trying to measure the power consumption of the STM32U575ZI microcontroller on the Nucleo-144 board but the results are much higher than expected.

[AEstr.1]

 I am using an ammeter connected instead of the JP5 jumper, as indicated in the manual (UM2861) and tried several examples.

For example: in PWR_EnterStopMode example I see around 568uA on the ammeter.

From the datasheet I expected to measure around 100- 150uA (typical in stop 0 on 3v3 on LDO)

Why is this happening?

Am I expected to unsolder some solder bridges to measure only the MCU consumption accurately?

With other low power examples I also measured currents in the range of several 100s of uA.

Thanks

Anton

[MM..1]

If you test with debuger config enable debug in low power modes MCU not enter STOP or other mode after programming without completely power off and on

[AEstr.1]

Thank you, tried to disable debug mode with HAL_DBGMCU_DisableDBGStopMode() and it worked: consumes around 130 uA in stop 0.

Do you know how to further reduce power consumption in other stop modes? Because other stop modes gave me very similar consumption.

[Amel NASRI]

Hi @AEstr.1​ ,

Can you check what do you get as consumption values for the other stop modes if you use the example PWR_ModesSelection?

-Amel