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what is voltage drawn byy ST Nucleo board (STM32F411RE) ?

ravivarmaalways1st
Associate II
Posted on October 29, 2016 at 15:55

Hi All,

What are the test points to measure the voltage drawn by STM32 Nucleo MCU ? schematics shows that it draws 3.3V where as Datasheet gives power consumption for 3.6 volts ?  Can someone tell me what is the voltage drawn by MCU ?

Thanks

Akhil

#voltage-power-supply #stm32f411re
6 REPLIES 6
Posted on October 29, 2016 at 17:15

Current is drawn

The STM32 can run over a wide voltage range, depending on the model.

You should be able to measure the 5V and 3.3V rails on the pins of the shield header

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ravivarmaalways1st
Associate II
Posted on October 29, 2016 at 19:27

Hi clive,

Thanks for the reply,

If STM32F411RE board is powered by Host PC through USB, does the MCU takes 3.3v ?

Posted on October 29, 2016 at 23:10

The NUCLEO board has a 3.3V regulator that bumps down the USB 5V supply

The DISCO boards have a regulator/diode arrangement which supplies 3.0V to the STM32 part.

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ravivarmaalways1st
Associate II
Posted on October 30, 2016 at 06:25

Hi clive,

Actually I want to check the power consumption values with peripehral ADC1, SPI1 on. 

Checked the Power consumption tables following Datasheet.:

http://www.st.com/content/ccc/resource/technical/document/datasheet/b3/a5/46/3b/b4/e5/4c/85/DM00115249.pdf/files/DM00115249.pdf/jcr:content/translations/en.DM00115249.pdf

So Can I consider the power consumption table in Page 71 for any power calculations ? Is the table values are measured at input voltage 3.3v ?

Thanks

Akhil

Posted on October 30, 2016 at 13:49

Is the table values are measured at input voltage 3.3v ?

It explicitly states these are with a 3.6V supply.

Some of the DISCO board provide a clear separation of the power connections that you can use a Idd jumper to measure the current.

The problem with most board however will be the external circuitry and how that contributes to the loading of the part and the power consumed.

To replicate you might want to make a break-out board with minimal connectivity.

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ravivarmaalways1st
Associate II
Posted on October 30, 2016 at 19:25

Any  idea on how much does it vary for 3.3v compared to 3.6v ?