VDD and VDDH for nRF52840

[zhong0920]

I am developing based on 52840. I can only supply VDD at 2V. I wonder if that is doable. If the answer is yes, then how should the VDDH be connected?

 

The datasheet requires that in normal voltage mode, external supply (2V) be connected to both VDD and VDDH (p.61), while the electrical spec says VDDH minimal should be 2.5V (p.80). So if I connect 2V to both VDD and VDDH, would the on-chip power still work? Or would the “connect both VDD and VDDH” not be required in this case?

 

Thanks a lot!

[Simonr]

Hi

What Turbo J says is absolutely correct, and you will have to connect the VDDH pin to VDD if you only want to operate in "normal VDD" mode.

Best regards,

Simon