Low consumption NucleoL476RG

[CamiloRJ9]

Hello community, I have been working with the nucleol476rg in low power modes, but I have had some doubts during the tests I have performed, specifically using the stand by mode, I understand that only the RTC is active in fact with it I set the alarm to wake it up from sleep mode, but it does not consume what is specified in the data sheet since it must be below the order of 50uA but depending on how I feed it it consumes 330uA or almost 4mA, 330 when I connect the power to AVDD and 4mA when I connect it to VIN, should some configuration be done from the Firmware or is it some change in the Hardware that must be implemented? I am attentive to any information, thank you very much.

[KnarfB]

There is a UM2243; "STM32 Nucleo expansion board for power consumption measurement" explaining how to adapt an STM32L476 Nucleo-64 board. See also this mdiscussion: Solved: Does the CubeMonitor-Power work with Nucleo-l476RG... - STMicroelectronics Community

hth

KnarfB

 

[CamiloRJ9]

ok, I understand the point of testing the consumption in this way, thanks, but in this case I am using the following function to put the board in sleep mode, before this, through Firmware, should any additional configuration be made to reduce consumption?, because I understand that for this mode the peripherals are already turned off, but with respect to something more configurable?

 

HAL_PWR_EnterSTANDBYMode();

 

[Sarra.S]

Hello @CamiloRJ9, 

You can check if all unused GPIO pins are configured in analog mode to minimize leakage currents. Also, make sure that the debug features are disabled.