why short reset pin with a GPIO pin?

zhiayang / mikoto

Bluetooth LE nRF52840 microcontroller in a pro-micro footprint.

Apache License 2.0

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Closed DoudouMee closed 2 years ago

DoudouMee commented 2 years ago

I dont understand why connect reset pin (P0.18/RESET) to P0.14 and P0.16. These 3 GPIO are completely shorted together.
If I change the schematic and free them up, can I use they 3 pins as GPIO without short P0.18/RESET to any other pin?

zhiayang commented 2 years ago

there is no other way to get the reset pin out from under the chip.

DoudouMee commented 2 years ago

there is no other way to get the reset pin out from under the chip.

soga!
So, in fact I dont need a high voltage on P0.18/RESET when this Soc starting up?

zhiayang commented 2 years ago

no, the reset pin has an internal pullup on nRF chips.

DoudouMee commented 2 years ago

I see, thanks a lot.