High Current Consumption in STM32 NUCLEO-H745ZI-Q in Standby Mode

[Abhinav99]

I am working with a Nucleo-H745ZI-Q development board and want to put it to standby mode to measure current consumption. I have put the domain D1, D3 in M7 and then domain D2 in M4 in standby mode. I also use 1 user LED for each core, so that I can know if the core is in standby mode. The problem is that after both the cores go to standby mode, even then the current consumption is 60 mA. I don't think it should be this high.

I am powering the board through a variable power supply and have kept the voltage at 3.3 V. The positive end is connected to CN8 pin7.

I use HAL_PWREx_EnterSTANDBYMode(PWR_D1_DOMAIN) to enter in standby mode.

Can someone help me out with this? Am I missing something?

[Amel NASRI]

Hi @Abhinav99 ,

The ready to use example STM32CubeH7/Projects/NUCLEO-H745ZI-Q/Examples/PWR/PWR_STANDBY_RTC is doing exactly what you need. Try it and let me know what you get as power consumption in this case.

You can refer to the readme file to know more how it works.

-Amel