Jlink CTRL-AP indicates that the device is secured

[abstract1340]

HI, I am start use NRF52840DK(rev3) to devlopment usb application，but jlink always show this information

I try to use 'nrfjprog --recover' to disable read protection, then program application hex file,

but jlink again show inforamtion when device reset. so now can't debug applicaiton

application use: nRF5_SDK_17.1.0_ddde560\examples\peripheral\usbd_hid_composite\pca10056

thanks for you help!

[Amanda Hsieh]

Hi, 

Have a look at this post. You could try to call the approtect_hw_disable function provided in that thread at the beginning of main() to disable approtect in UICR.APPROTECT. 

Regards,
Amanda

[NRM]

hi,
I have the same problem with other examples ( just examples that is need loading with soft device). I follow "this post" that you mention step by step, but the problem doesn't solve

I can load "nRF5_SDK_15.2.0_9412b96" examples with the nrf52840 eval kit board(nrf52840 eval kit pca10056 ) , but I can't run the same examples with custom board.
    
  Thanks in advace.

[Amanda Hsieh]

Hi, 

Please create a new support case for your own issue. That can help us manage your case easily. 

-Amanda