https://devzone.nordicsemi.com/f/nordic-q-a/71409/about-rbp-conf-of-uicrPlease tell me about RBP CONF of UICR. Q1. What is the purpose of UICR&#39;s RBPCONF (read-back protection)? What kind of protection is it? Q2. What changes when RBPCONF (read-back protection) of UICR is set to Enabled? Q3. Is your recommended setting foren-USTelligent Community 13Mon, 08 Feb 2021 13:28:40 GMThttps://devzone.nordicsemi.com/thread/293344?ContentTypeID=1Mon, 08 Feb 2021 13:28:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b41ed5ba-f759-41f6-a44e-8412da7b6d21run_ar<p>Hi.<br />Q1 and Q2, Please refer to Chapter 9 in the Reference manual</p> <p>Q3. That depends on your application requirements. You could enable this after you finish you application development to protect you application from being red&nbsp; by a third party, but keep in mind that this is not a secure element. Enabling the readback protection makes it a harder to read the content of the flash, but not impossible. Later chips such as the nrf52 series has better protection, and the nRF53 has improvements over the nRF52.</p> <p>Q4. Not 100% sure as it has been a while since the last time I looked at this. But I think it is ignored as the pre-programmed factory code wouldn&#39;t configure the code regions.</p><div style="clear:both;"></div>