Can i use barrel jack and usb-c at the same time while being able to use the OFF pin?

Official Hardware UNO Family UNO R4 WiFi
1

Hi,

I know i could use the barrel jack and the usb power at the same time with the UNO R3, and the barrel jack will be the main power if it exceeds 7.2V, BUT i don't know if i can do the same with the UNO R4 WiFi (and Minima)? And if so at what voltage does it choose the barrel jack one?
Also i wonder if this way i could or couldn't use the OFF pin? If i use the usb-c for power, this functionality is disabled by hardware.

Edit: i tried it, and it works, only that the OFF pin is still unusable. Also i don't know the voltage that it switches and i don't know why but when i connect the barrel jack (12V 1A adapter), every LED (7seg and two simple ones are connected) is a tiny-tiny bit brighter.

2

UNO R4 boards have a schottky diode at USB supply. So only about 4.8V supplied to the MCU. When powering via barrel jack, MCU gets full 5V.

3

The OFF pin only disables the power from the power jack.

There is no guaranteed minimum voltage on the power jack that will cause the power to be switched between USB and power jack. However, they do recommend a minimum of 6V for the power jack.
So if you have both USB power and jack power, then grounding the OFF pin will cause it to switch from the jack power to the USB power

4

Ohh i see, thanks!