https://devzone.nordicsemi.com/f/nordic-q-a/124364/do-i-need-to-do-something-special-to-disable-easydma-on-an-nrf52840I&#39;m wanting to repetitively read the SPI buffer as a master to check a status bit. I figure there&#39;s no sense in using the DMA when I can read the SPI RXD buffer directly. Another Nordic DevZone question has an answer stating that I can just use theen-USTelligent Community 13Sun, 14 Sep 2025 17:44:38 GMThttps://devzone.nordicsemi.com/thread/548675?ContentTypeID=1Sun, 14 Sep 2025 17:44:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2ea8bf3e-26ec-40be-996e-d7cea5f4c063Speedy1894<p>I&#39;m surprised I hadn&#39;t noticed the <code>ENABLE</code> register had 4 bits! After looking at it now, though, it looks like <code>SPIM</code> is enabled by setting the bits to <code>0b0111</code>, <code>SPIS</code> with <code>0b0010</code>, and <code>SPI</code> with <code>0b0001</code> (there are four specified bits)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/548674?ContentTypeID=1Sun, 14 Sep 2025 17:39:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f574ba77-bb94-4d5c-ad90-48d9eee452echmolesworth<p>(Unofficial answer) The Enable register is the key; there are 3 enable bits on the nRF52840 which are used 1 bit each for SPI enable, Rx DMA enable and Tx DMA enable. With the Enable register set to 0x0 all are disabled; 0x1 means SPI with no DMA; 0x7 SPIM with both Rx and Tx DMA. DMA-related registers are ignored if DMA enable bits are not set. <span style="text-decoration:line-through;">Want only Rx DMA or only Tx DMA? Guess which Enable bits (0x3 or 0x5) and test.</span></p><div style="clear:both;"></div>