https://devzone.nordicsemi.com/f/nordic-q-a/121610/nrf5340-does-the-usb-cdc-acm-example-use-one-of-the-shared-peripheralsWe are using the nRF5340 and our use case makes full use of all 4 shared peripherals for SPI and TWI as well as SPIM4. We want to add UART over USB and I was able to port over the CDC-ACM example without much issue and noticed that it was not declaringen-USTelligent Community 13Tue, 20 May 2025 12:20:04 GMThttps://devzone.nordicsemi.com/thread/536196?ContentTypeID=1Tue, 20 May 2025 12:20:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e96ae09a-6715-4824-a432-089f61c5063eEdvin<p>Hello,</p> <p>No, the USB doesn&#39;t have any shared peripheral resources with the other peripherals, like SPI and TWI does.&nbsp;</p> [quote user=""]My understanding is that the CDC-ACM example utilizes the USBD peripheral instead of a UARTE and thus should work without conflict to any of our existing peripherals[/quote] <p>Your understanding is correct.&nbsp;</p> <p></p> <p>You can refer to this table:</p> <p><a href="https://docs.nordicsemi.com/bundle/ps_nrf5340/page/chapters/memory/appmem.html#ariaid-title3">https://docs.nordicsemi.com/bundle/ps_nrf5340/page/chapters/memory/appmem.html#ariaid-title3</a></p> <p>Peripherals with a shared address share the peripheral resources, and cannot be used simultaneously. As you can see, SPIM0 , SPIS0, TWIM0, TWIS0 all share address 0x50008000.</p> <p>USBD is the only peripheral on address 0x50036000.</p> <p></p> <p>Best regards,</p> <p>Edvin</p><div style="clear:both;"></div>