How to change UICR register values

[Raj]

Hi all, I'm working on SDK11.0.0 experimental signed bootloader, I stored device type and device revision in uicr register now I need to update my bootloader through dfu and it updating successfully but device type and device revision values in uicr register is not changing.

when I study in documentation I found that uicr can erase only by eraseall that means erasing complete chip or cpu can able to write 1's to 0's only. Now I need to change device type and device revision in uicr register without erasing complete chip (eraseall) is their any chance? If their is a chance how?

Thanks in advance

[Keton]

UICR is one time programmable memory (OTP) designed in such way that it can be only erased by full chip erase using programmer. So I'm afraid there's no way to do it at runtime.

[bjorn-spockeli]

Hi Raj,

as you correcty state in your question, the UICR registers can only be erased by issuing a ERASEALL command (i.e. erasing entire chip). It is possible to alter the content of a UICR register at runtime, but it is only possible to change 1's to 0's.

-Best regards

Bjørn

[zhongxichuan]

Hello ,can you tell me how to store some bytes in uicr ? I am a new, think.

[bjorn-spockeli]

@zhongxichuan: Please create a new question regarding your issue.