https://devzone.nordicsemi.com/f/nordic-q-a/59266/flash-write-time-specificationHi Now I&#39;m developing using nRF52832, and trying to estimate programming time. So, I want to know what time to wrie one word &quot;tWRITE&quot; mean exactly. Does it mean that one word writing is finished within 67.5us ? Or does it take 67.5us to 338us to writeen-USTelligent Community 13Thu, 19 Mar 2020 10:09:42 GMThttps://devzone.nordicsemi.com/thread/240599?ContentTypeID=1Thu, 19 Mar 2020 10:09:42 GMT137ad170-7792-4731-bb38-c0d22fbe4515:3731961f-59e0-4090-976a-7aa2559a1267masamasa<p>Hi Hung,</p> <p>Thanks for your answer.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/240594?ContentTypeID=1Thu, 19 Mar 2020 10:00:18 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8fa4f49c-a8cc-46ac-9ff0-1908c4dbb4eaHung Bui<p>Hi Masamasa,&nbsp;</p> <p>The second&nbsp;definition&nbsp;is correct. It takes from 67.5us to 338us to write one word. This varied from chip to chip, on voltage, etc. So do expect worst case scenario of 338us per word.&nbsp;<br />Please note that this is the time it take for the CPU to write to flash. It&#39;s not the time of the programmer (via CPU) to write to flash. It will take a few cycles more for the data to get to the CPU before being written to flash.&nbsp;</p><div style="clear:both;"></div>