https://devzone.nordicsemi.com/f/nordic-q-a/118851/nrf52833-qdaa-nrf21540-spi-flashHello, we are developing a new product based on the nRF52833 QFN40 IC. We would like to add the nRF21540 range extender to the product and also a SPI Flash to store firmware images that will be used for firmware updates. Is it possible to shareen-USTelligent Community 13Wed, 12 Feb 2025 16:25:51 GMThttps://devzone.nordicsemi.com/thread/522698?ContentTypeID=1Wed, 12 Feb 2025 16:25:51 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d32e825b-4b0b-4977-b3e5-b707486f1b8dKazi Afroza Sultana<p>Hello Andrea,</p> <p>&#39;&#39;<span>Is it possible to share the SPI bus (SCLK, MOSI, MISO) between the nRF2150 and the Flash? Is there any incompatibility both from HW and FW point of view?&#39;&#39;</span></p> <p><span>It is possible to share the SPI bus between nRF2150 and the Flash. You need to select different Chip select line (CS) under SPI master.&nbsp;SCK, MOSI, MISO are common. One CS pin for each SPI slave device to select which one are active during the transfer.</span></p><div style="clear:both;"></div>