https://devzone.nordicsemi.com/f/nordic-q-a/5889/can-i-erase-uicr-by-ble-appI write version of ble app into uicr, and I want to rewrite it when I update my ble app. Or I must erase all chip , then write uicr again?en-USTelligent Community 13Tue, 10 Mar 2015 11:18:40 GMThttps://devzone.nordicsemi.com/thread/20529?ContentTypeID=1Tue, 10 Mar 2015 11:18:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:613d6998-f19f-4a5f-a347-3f03589a095dHung Bui<p>I don&#39;t think it&#39;s possible to erase UICR and rewrite without erasing the whole chip.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/20531?ContentTypeID=1Mon, 09 Mar 2015 01:23:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:b96081ff-e9a4-4035-b9c8-89a38b9b9dc7gootoomoon<p>typedef struct { __I uint32_t RESERVED0[256]; __I uint32_t READY; __I uint32_t RESERVED1[64]; __IO uint32_t CONFIG; __IO uint32_t ERASEPAGE; __IO uint32_t ERASEALL; __IO uint32_t ERASEPROTECTEDPAGE; __IO uint32_t ERASEUICR; } NRF_NVMC_Type;</p> <p>You mean I can erase UICR by write NVMC-&gt;ERASEUICR ?</p> <p>I try but not work. How can I use it?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/20530?ContentTypeID=1Thu, 05 Mar 2015 10:58:28 GMT137ad170-7792-4731-bb38-c0d22fbe4515:264ef512-f3f0-4fcd-8037-92b531e35481Jimmy Wong<p>No. You can only erase UICR with entire flash region together.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/20528?ContentTypeID=1Thu, 05 Mar 2015 10:55:07 GMT137ad170-7792-4731-bb38-c0d22fbe4515:87359e22-b879-4fe2-8445-0d7190904a51RK<p>just erase UICR and then re-write</p><div style="clear:both;"></div>