https://devzone.nordicsemi.com/f/nordic-q-a/11786/readback-protection-of-customer-area-of-uicrHello, The question is about CUSTOMER area in UICR. After locking chip wirh UICR.RBPCONF.PALL I noticed that I still able to read UICR.CUSTOMER data. Could I enable readback protection of data written to UICR? Thanks.en-USTelligent Community 13Tue, 09 Feb 2016 11:58:46 GMThttps://devzone.nordicsemi.com/thread/44559?ContentTypeID=1Tue, 09 Feb 2016 11:58:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f299ccd1-0106-444f-8abc-5e619154c11fSusheel Nuguru<p>In nRF52, it is UICR.APPROTECT and you are right, debugger cannot read anything (including UICR and FICr) from the bus if this is enabled.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/44557?ContentTypeID=1Tue, 09 Feb 2016 09:41:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a122078d-5951-4633-8aa1-d90755d9a66bendnode<p>Does this apply also for nRF52? I&#39;ve understood that setting RBPCONF:ALL will disable debugging interface completely...</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/44558?ContentTypeID=1Tue, 09 Feb 2016 08:41:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b10e4b7e-085f-4e89-9053-d19ac23ae2d9Valer_I<p>Thank you, Aryan.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/44556?ContentTypeID=1Tue, 09 Feb 2016 07:53:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e47e6329-6806-4441-8ad0-9d9ee2292bebSusheel Nuguru<p>UICR.RBPCONF.PALL is to protect the code, RAM and peripherals. You will always be able to read UICR, FICR and CPU registers. If you want readback protection on your customer data, then I recommend you to use code flash area (using pstorage or fstorage library) and use the RBPCONF:PALL setting to protect it.</p><div style="clear:both;"></div>