Boot sequence for nRF52832

[cswanson420]

Where in the official documentation can I find what the boot order/proedure is for the nRF52832?

For instance: This post gives a coarse overview which is great but I am seeking the ability to match the instructions presented in Ozone with a flow diagram or description in documentation.

I am interested in how the bootloader is invoked - or not invoked - and how the boot events occur if the softdevice, bootloader, or none of these are present. There are bits and pieces strewn like tribal anecdotes throughout the forum, so I am hoping the description is really in front of my face and I am too thick to have recognized it.

[Hung Bui]

Hi cswanson,

Beside the post, you can also have a look at the softdevice specification page here to know about the reset behavior.

The MBR is distributed as part of the softdevice. But it's not updated when you update a softdevice.

Note that our current bootloader only works with the softdevice flashed on the chip, even if you don't use OTA DFU.

The MBR will check the UICR to see if the bootloader is installed (and where the bootloader is) before it device to forward interrupts to the bootloader or to the Softdevice.

[cswanson420]

Thank you. This makes things clearer.