CPU memory accesses interfering with radio DMAhttps://devzone.nordicsemi.com/f/nordic-q-a/49759/cpu-memory-accesses-interfering-with-radio-dmaHi there, I am working with the NRF52840 Dongle and have been trying to verify what sort of influence other processes on the chip could have on the radio. Specifically, I was wondering whether having the CPU write to or read from memory during rampupen-USTelligent Community 13Tue, 16 Jul 2019 14:12:59 GMTRE: CPU memory accesses interfering with radio DMAhttps://devzone.nordicsemi.com/thread/198759?ContentTypeID=1Tue, 16 Jul 2019 14:12:59 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ddd4dc41-5d5e-420f-8af8-bfcac709b18dabs<p>That makes sense, thanks!</p><div style="clear:both;"></div>RE: CPU memory accesses interfering with radio DMAhttps://devzone.nordicsemi.com/thread/198365?ContentTypeID=1Mon, 15 Jul 2019 09:11:12 GMT137ad170-7792-4731-bb38-c0d22fbe4515:0e2bcd3c-6041-43f9-9494-c1e4692e74a3Dmitry<p>Hi,</p> <p>even at 2 Mbps, you&#39;ll receive or transmit one byte every 4 usec, that is 256 CPU cycles.<span>&nbsp;</span>To lock bus entirely,&nbsp;I imagine&nbsp;32 consecutive STM/LDM {r0-r7} instructions...&nbsp; If you turn on direction finding (on nRF52811), you&#39;ll get much higher RAM traffic caused by radio - 4 bytes every 0.125 usec, and I didn&#39;t encounter any congestions even in this case.&nbsp;</p><div style="clear:both;"></div>