https://devzone.nordicsemi.com/f/nordic-q-a/38570/write-speed-with-mx25r6435f-on-nrf52840dkHi everyone, I am testing out the qspi flash on pca10056. While the read speed is decent around 650 KBs, the write speed is too slow ~ 35 KBs. It could be our own usb/caching software. But I wonder if anyone here got any better write speed in generalen-USTelligent Community 13Wed, 19 Sep 2018 09:12:02 GMThttps://devzone.nordicsemi.com/thread/149373?ContentTypeID=1Wed, 19 Sep 2018 09:12:02 GMT137ad170-7792-4731-bb38-c0d22fbe4515:4a1e9ebc-38dc-4b52-a3ce-9469da28b6d7Sigurd<p><span>Yes, this is typical characteristics of NOR Flash memory(such as the MX25R6435F); high read speed and slow write/erase speed. The MX25R6435F is perfect for execute in place (XIP) for executing program code directly from external flash. This is one of the features that the QSPI peripheral supports. You can read more about XIP <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.nrf52840.ps/qspi.html?cp=2_0_0_5_18_4#execute_in_place">here</a>.</span></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149363?ContentTypeID=1Wed, 19 Sep 2018 08:47:06 GMT137ad170-7792-4731-bb38-c0d22fbe4515:56554869-1822-4e2b-a99d-23629f408e01hathach<p>60 KB/s is faster than mine, but still very slow comparing to read speed. I guess that is as fast as the external Flash on pca10056 could get :(&nbsp;</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/149361?ContentTypeID=1Wed, 19 Sep 2018 08:38:53 GMT137ad170-7792-4731-bb38-c0d22fbe4515:93dddf1b-1445-4887-bceb-a6dd443000ddSigurd<p>Hi,</p> <p>Here is my results with the configuration you used, tested on Windows with USBDeview:</p> <p><img alt=" " src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/speed.PNG" /></p><div style="clear:both;"></div>