Hello all,
I made a custom board with a STM32U031 and measure the standby and standby+RTC current. The value was very high (µA), so I tried with 2 nucleo board, U031 and U083 with the PWR selection exemple code from ST.
And I also check this video with the measurements:
ST Ultra-Low Power MCU STM32U0 in Action: Exploring Run Modes & Measuring Currentyoutube.com
And I have these results with the U031:
| | theoritical | measured |
| RUN 1 | 3,75 mA | 5 mA |
| LPSleep FlashOff | 61,5 µA | 50 µA |
| STOP 2 | 805 nA | 600 nA |
| STBY + RTC | 345 nA | 600 nA |
| SHUTDOWN | 7 nA | 100 nA |
and these with the U083:
| | theoritical | Measured |
| RUN 1 | 3,75 mA | 3,82 mA |
| LPSleep FlashOff | 61,5 µA | 55 µA |
| STOP 2 | 805 nA | 815 nA |
| STBY + RTC | 345 nA | 360 nA |
| SHUTDOWN | 7 nA | (<100nA) |
So I don't understand why I can't reach the value with the U031.
can someone help me to understand my mistake and find the issue?
Thanks for your help
