for STM32F405RGT, is the VSSA and VSS connected internally on the chip? Should I need to connected them externally ?

JieHong Mai · ‎2019-06-15

Tesla DeLorean · ‎2019-06-15

Connect everything properly externally.

Make sure you have a pull-down on BOOT0

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JieHong Mai · ‎2019-06-27

I tested the resistance between VssA and Vss of STM32F405RGT using multimeter, I found it was 8 ohms.

Tesla DeLorean · ‎2019-06-27

That's great, but what's the need to half-**** the PCB design and not connect everything properly?

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