How should I use this OTP region

[tianwanjie]

Now I have some algorithm data that need to be written before the factory, which should not be changed in the future. How should I use this OTP region

[Vidar Berg]

Hello,

It is possible to store data in the OTP registers during production programming if that's what you want. As an example, here is how you can use nrfjprog with a J-link programmer to set UICR.OTP[0] to the value 0x123456

$ nrfjprog --memwr 0xff8100 --val 0x123456 // Store value

$ nrfjprog --memrd 0xff8100 // read back value from the same UICR register to verify the content

Here is some additional reading relevant to the OTP registers that you may want to take a look at as well: Protecting the UICR content, Writing to user information configuration registers (UICR), NVMC protection mechanisms.