After firmware flash, first time STOP 3 mode power consumption is higher (if board is not power cycled)
Hello,
We are using STMU575 MCU and it's power saving mode STOP3.
For verification purpose we are using NUCLEO-U575ZI-Q eval board, ST cube example PWR_LPMODE_RTC (STM32CubeU5-1.7.0). ST cube IDE version is: 1.18.0.
I modified existing code little bit (as per suggestion by ST team in other thread 735939)to make it work for STOP 3 mode.
For current measurement, connected current meter between JP5.
When I am running this code, I am observing following thing:
After firmware flash, when first time code is executed (with NRST reset and without USB power removal) and enters in to STOP 3 mode, current consumption shows 0.19 mA.
When I remove board's USB cable and insert it again to power cycle it to execute the code and enter in to STOP 3 mode, it shows current consumption very low compare to first time (~0 mA with 3¾ digit multimeter).
Trying to know why current consumption is higher first time after firmware flash (without power cycle) in comparison with current consumption after board power cycle.
Please assist.