VBUS on NRF52840

[Hani.Abidi]

Hello,

My system is going to run off a Lithium Ion battery. 

I don't need to use the USB Interface on nRF52840.

Is it okay for me to leave VBUS, D+, D- floating?

And connect 4.2V Li+ Battery to VDDH?

Thanks,

Hani Abidi

[Simonr]

Hi Hani

It's recommended to ground VBUS, as this activates an on-chip pull-down on DECUSB, which means you don't need to use the capacitor in the ref. design, which "saves" you a component. D+ and D- is fine to leave floating.

Sashi is absolutely correct in regards to the li-ion battery.

Best regards,

Simon