Why MBR is erased when I erase or write the SorfDevice with 1kB at address 0x3000?

[tany0699]

HI, All.

I have some troubles: Why MBR is erased when I erase or write the SorfDevice with 1kB at address 0x3000? My SorfDevice version is 7.1.0.

Thanks all.

Update: Attach my snapshot:

Befor erase the 12th page:

Erasing the 12th page:

After erase the 12th page:

Read and save as hex file:

[Susheel Nuguru]

12th Page is where the information of softdevice is located, like its size and other firmware info. When you delete that information, then nRFgo thinks that there is no softdevice. Even read and save as hex file need 12th page. You can for example try to delete 13 or 14th page and at that time nRFgo can still read this critical information about softdevice from 12th Page

[tany0699]

Thank you for your reply, Aryan.Your are right and with your help, I had solved my problem,thank you very much.