2016-10-29 06:55 AM
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 ?ThanksAkhil #voltage-power-supply #stm32f411re2016-10-29 08:15 AM
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 header2016-10-29 10:27 AM
Hi clive,
Thanks for the reply,If STM32F411RE board is powered by Host PC through USB, does the MCU takes 3.3v ?2016-10-29 02:10 PM
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.2016-10-29 10:25 PM
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.pdfSo 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 ?ThanksAkhil2016-10-30 05:49 AM
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.2016-10-30 11:25 AM
Any idea on how much does it vary for 3.3v compared to 3.6v ?