I'm trying to understand what ST recommends for decoupling caps for STM32F030CC.

The diagram in the datasheet shows "2x100 nF" caps on the Vdd/Vss pairs. Does this mean 2 parallel 100nF caps per Vdd/Vss pair? Or are they referring to the total number of 100nF caps needed, i.e. if there are 2 Vdd/Vss pairs then it's 1 100nF cap per Vdd/Vss pair, for a total of 2 100nF caps?

STM32F030 datasheet

power supply schematic from the STM32F030 datasheet


1 Answer 1


They are referring to the total number of capacitors needed.

ST has a useful document: "AN4325 - Getting started with STM32F030xx and STM32F070xx series hardware development"

Inside, it is a bit more clear:

enter image description here

And they explain it directly in Section 5.4:

enter image description here


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.