https://devzone.nordicsemi.com/f/nordic-q-a/92999/nrf52-peripheral-instantiationThe UART and UARTE peripherals share the same ID (2), and only one of these can be enabled at a time. How do you enable only one of these peripherals? The register blocks are mapped to the same addresses. In the nRF52 this is: #define NFR_UART0en-USTelligent Community 13Wed, 19 Oct 2022 04:50:40 GMThttps://devzone.nordicsemi.com/thread/391319?ContentTypeID=1Wed, 19 Oct 2022 04:50:40 GMT137ad170-7792-4731-bb38-c0d22fbe4515:775fe528-fb49-4d7b-b04c-15381cd8259ePhil<p>I meant address 0x40002000 + 0x0500 = 0x40002500</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/391318?ContentTypeID=1Wed, 19 Oct 2022 04:49:39 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f803289f-9460-44f3-ab08-b77ee6000c36Phil<p>I&#39;ve found the answer.</p> <p><span>NFR_UART0-&gt;ENABLE = 0x04;&nbsp; &nbsp; &nbsp; // Enables UART0</span></p> <p><span>NFR_UARTE0-&gt;ENABLE = 0x08;&nbsp; &nbsp; &nbsp; // Enables UARTE<br /><br />Both these lines write to the same address:&nbsp; 0x40004500<br /><br /><br /></span></p><div style="clear:both;"></div>