https://devzone.nordicsemi.com/f/nordic-q-a/28044/ask-about-this-bug-the-spim-an-additional-byte-is-clocked-out-when-rxdmaxcnt-1Dear nordic employee 1、when I use the spim to send 1 byte address to read it&#39;s value(4 bytes)，like this： nrf_drv_spi_ transfer(&amp;spi,headerBuffer,(uint8_t)headerLength,readBuffer,(uint8_t)readlength); headerLength=1; readlength=4; I get the a problemen-USTelligent Community 13Fri, 08 Dec 2017 14:53:05 GMThttps://devzone.nordicsemi.com/thread/110490?ContentTypeID=1Fri, 08 Dec 2017 14:53:05 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2dd5bc18-1942-4cde-ae36-01c12fc9e842Sigurd<blockquote> <p>haven&#39;t added the PPI and gpiote code yet</p> </blockquote> <p>Please add the full fix to your example code (including the PPI and GPIOTE code).</p> <p>We can continue the discussion in the original post.</p><div style="clear:both;"></div>