We are designing in the 52840 as a processor in a new sensor product and are looking at using the HOLYIOT YJ-18010-nRF52840 part that you indicate on your site is a third party module supplier (wider pitch on connectors). We are designing for normal power mode (1.8 to 3.6 volt operation) for which you recommend tying the VDDH line to the VDD line.
We noticed that the HOLYIOT part (cutout above) which is configured for normal power mode) does not connect VDDH to VDD - instead it connects the VDDH to one side of a 4.7uF cap the other side of which is connected to ground.
I have gone through the forums and noted the comment below about not connecting VDDH when using VDD and running in normal mode.
nrf52840-normally-supplied-via-vddh---can-it-be-supplied-just-via-vdd-for-swd-programming-without-connecting-vdd-and-vddh-together
Hi
I have checked with my colleagues, and there shouldn't be any problem of letting VDDH float while
powering the chip in normal voltage mode while you program it. It is just not recommended to leave it
floating over time, which is why the PS tells you to short them. Sorry for the confusion.
Best regards,
Simon
So my question is - for running in normal power mode - Is what HolyIOT did on the YJ-18010-nRF52840 part (connecting the VDDH to one side of a 4.7uF cap the other side of which is connected to ground) acceptable? Will we have possible problems later with this type of connection to the VDDH? From my reading of the data sheets and info available it should not be a problem but would like confirmation.
ciao Carl A
