https://devzone.nordicsemi.com/f/nordic-q-a/54362/nrf52-not-use-uicr-clenr0-registerHello!! Is UICR.CLENR0 register disabled on nrf52SoftDevice?(only nRF51Chip??) When writing with nRFgoStudio(&quot;Enable SoftDeviceProtection&quot; CheckBox is on), the firmware size is written to the UICR.CLENR0 register.(4Byte@0x10001000) Chip:nRF52832en-USTelligent Community 13Thu, 14 Nov 2019 23:54:42 GMThttps://devzone.nordicsemi.com/thread/220190?ContentTypeID=1Thu, 14 Nov 2019 23:54:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:aee3b258-7e9c-4226-be2d-0cf7c9fc151dToyo33<p>Thank you for your&nbsp;replay.</p> <p>I will try nRF Connect for Desktop.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/220052?ContentTypeID=1Thu, 14 Nov 2019 11:49:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:aa91e8e6-e94f-4197-9f43-5d0ceed298ea&#216;yvind<p>Hello,&nbsp;<br /><br />UICR.CLENR0 is only part of nRF51 devices. I recommend switching the Programmer app found in <a href="https://www.nordicsemi.com/Software-and-tools/Development-Tools/nRF-Connect-for-desktop">nRF Connect for Desktop</a>.<br /><br />Kind regards,<br />Øyvind</p><div style="clear:both;"></div>