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STM32F401 power consumption in Reset

Posted on December 14, 2016 at 20:46

I'm using an STM32F401 and am trying to understand the power consumption when the device is powered (3.3VDC) and held in System Reset.  

Can you tell me what the expected current draw will be when this device is held in System Reset? (Low level on NRST pin).

I dug through the the data sheet, reference manual, AN3430, and AN4365, but came up empty.  


Rick Nardone

Jaroslav BECKA
ST Employee
Posted on December 20, 2016 at 16:26

Hi Rick,

the best would be to measure this value manually. 

It is not so easy to define, because the

default state of 

GPIOs of STM32F401 is input floating.

In this mode it is safe configuration, but very sensitive to noise and thus internal schmitt triggers can toggle on very high frequency 

producing additional consumption.

With discovery or nucleo development boards you can measure it easily.