https://devzone.nordicsemi.com/f/nordic-q-a/14256/nrf52-gpio-dmaHello, Is it possible to use easyDMA to transfer from GPIO to memory without involving the CPU? We need to read from a parallel bus for a short duration, without losing any data. Additionally, what is the maximum input data rate to the GPIO, i.e. howen-USTelligent Community 13Sat, 04 Jun 2016 01:15:41 GMThttps://devzone.nordicsemi.com/thread/54434?ContentTypeID=1Sat, 04 Jun 2016 01:15:41 GMT137ad170-7792-4731-bb38-c0d22fbe4515:a92b898d-a024-4c1b-bca5-f812dec4d3acRK<p>No the cortex M4 in the nRF52 does not have bit-banding, not that I can think why it would matter. The capabilities of the chip are listed in the documentation, including which of the M4 ARM optional features are and are not implemented.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54433?ContentTypeID=1Sat, 04 Jun 2016 01:09:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:e21626a8-51d7-4243-a398-fdd8db1df507af2377<p>thank you for the answer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54432?ContentTypeID=1Fri, 03 Jun 2016 16:56:20 GMT137ad170-7792-4731-bb38-c0d22fbe4515:effb2a03-645a-4152-a0cb-ba5459d32e5fSRA<p>Does the Cortex M4 in the nf52 have bit banding?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/54431?ContentTypeID=1Fri, 03 Jun 2016 11:03:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dabd4450-be43-4bb2-9cf1-adcd4eca0aaeMartinBL<p>Hi,</p> <p>Unfortunately not. I can&#39;t think of any hacks to achieve it without involving the CPU either. The best solution I can think of is to use some sort of parallel to serial SPI converter chip. The SPI has easyDMA, but obviously can&#39;t reach the same data throughput as a parallel bus. Max bitrate for the SPI is 8 Mbps.</p><div style="clear:both;"></div>