nRF9151 UART: DMA vs FIFO – Seeking Fast TX with FIFO Setup

nRF9151 UART: DMA vs FIFO – Seeking Fast TX with FIFO Setuphttps://devzone.nordicsemi.com/f/nordic-q-a/123378/nrf9151-uart-dma-vs-fifo-seeking-fast-tx-with-fifo-setupI’m working with nRF9151 + Toolchain 2.9.0 and wanted to share my experience & issue while sending ~7kB data over UART. I’ve tried both DMA & FIFO-based approaches — here’s what I learned, and where I need help. DMA-Based UART (Async API) To achieveen-USTelligent Community 13Mon, 04 Aug 2025 11:41:23 GMTRE: nRF9151 UART: DMA vs FIFO – Seeking Fast TX with FIFO Setuphttps://devzone.nordicsemi.com/thread/544446?ContentTypeID=1Mon, 04 Aug 2025 11:41:23 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0c54d2fa-faa4-4c74-a899-043c67acfc38Hakon<p>Hello,</p> <p><span>This is indeed the reason why we introduced async API years ago. Interrupt driven API is slow, RX can only be done with interrupt on every byte, TX could be a bit faster but async API is recommended for good performance.</span></p><div style="clear:both;"></div>