STM32F415RGT6 power scheme

zexx86 · ‎2014-12-25

Posted on December 25, 2014 at 22:10

Hello,

I am engineering new PCB. It is little bit unclear from datasheet so I would like to know if my power supply scheme is correct, especially decoupling capacitors.

Thank you very much!

#stm32-f4-power-supply-scheme

Tesla DeLorean · ‎2014-12-25

Posted on December 26, 2014 at 00:45

Definitely don't want to be tying NRST to the 3V3 supply.

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zexx86 · ‎2014-12-26

Posted on December 26, 2014 at 11:30

Thank you, so I can leave it unconnected?

Also do I need to connect VDDA, VSSA in case I don't plan to use Analog peripherals?

jpeacock · ‎2014-12-26

Posted on December 26, 2014 at 18:05

VDDA also powers the PLL clock multiplier, so it still has to be present even if you don't use the ADC. I always run a ferrite bead between it and VDD, a choke for high frequency switching noise.

Jack Peacock