https://devzone.nordicsemi.com/f/nordic-q-a/95412/nrf52840-can-we-use-uart0-with-interrupt-api-and-uart1-with-async-apiHi, We are using nRF52840 for our project. we need two UARTs UART0 - for BLE UART1 - for communicating with SOC Zephyr RTOS supports following API for UART. Async UART API Interrupt-driven UART API Polling UART API Throughput measurementen-USTelligent Community 13Mon, 09 Jan 2023 18:13:53 GMThttps://devzone.nordicsemi.com/thread/403922?ContentTypeID=1Mon, 09 Jan 2023 18:13:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:947c7b98-03a7-4ff0-8885-2e886a1a5ec0Alaganraj<p>Hi Sigurd,</p> <p>Thank you for prompt response. Let me try this out and get back to you.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/403700?ContentTypeID=1Sun, 08 Jan 2023 21:04:16 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2ffa4660-21e6-4d60-90ba-ce72a5315106Sigurd<p>Hi,</p> [quote user=""]1. Can we use&nbsp;<span>interrupt-driven api&nbsp; for UART0 and&nbsp;</span><span>Async API for UART1 in same application?</span>[/quote] <p>Yes, some relevant configs:<br /><pre class="ui-code" data-mode="text">CONFIG_SERIAL=y CONFIG_UART_INTERRUPT_DRIVEN=y CONFIG_UART_ASYNC_API=y CONFIG_UART_0_INTERRUPT_DRIVEN=y CONFIG_UART_1_INTERRUPT_DRIVEN=n CONFIG_UART_1_ASYNC=y</pre></p> [quote user=""]ie) Is it possible for receive more than 1 byte per interrupt in interrupt-driven api?[/quote] <p>No.</p><div style="clear:both;"></div>