nrfjprog read back protection is working??

[sosse]

Hello, after I program bootloader, sd, application, I did the following command to do read back protection,

nrfjprog --rbp ALL -f NRF51

But, even though I still can get data by using nrfjprog --memrd xxxxx. Can anybody tell me how can I protect to somebody to read my chip?? Thank you.

[endnode]

UICR register is reloaded during nRF5x reset, have you powered the chip off and on (or issued reset command)?

[endnode]

Sorry, I've corrected the script. It is suited for nRF52, modifying it for nRF51 is easy (change target to NRF51, Soft Device HEX to S110 or S130 variant you use and name your app HEX file). Now the address 0x300C is chosen because there should be Soft Device version string. 0xFFFFxxxx is correct, whatever else (like all zeros) indicates that read-back is active.