Can I use a gpio pin to change boot mode?

[lupin]

Hello, I'm beginner for nRF52.

I saw examples about entering DFU by button and buttonless.

Is it also possible that changing the boot mode by a gpio pin which controlled by external source?

Just for example, if the gpio pin is high then boot as DFU and is low then boot as normal application.

Thanks,

Calvin

[lupin]

Hi Edvin,

Thank you for your explanation. It's very helpful.

Thanks,

Calvin