/nordic/nordic-blog/b/blog/posts/difference-between-nrf52840-engineering-a-and-b-reAfter the release of nRF52840 Engineering B we have received several inquiries about the difference between Engineering A (nRF52840-QIAAAA) and Engineering B (nRF52840-QIAABB) reference designs. One reason for the inquiries is that after swapping Engen-USTelligent Community 13 Non-Productionhttps://test-devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/difference-between-nrf52840-engineering-a-and-b-reThu, 08 Mar 2018 18:54:36 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8d513b6d-0d28-4880-b970-c6f5acdc23cfuser258190<p>What is the purpose of NC (no connect) bypass capacitors? Is it a backup option in case there is not enough margin in running RF-PHY tests? Are these likely to be removed in the future?</p><img src="https://test-devzone.nordicsemi.com/aggbug?PostID=1154&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">https://test-devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/difference-between-nrf52840-engineering-a-and-b-reWed, 17 Jan 2018 17:22:33 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8d513b6d-0d28-4880-b970-c6f5acdc23cfuser267830<p>That clarification helps a lot!! It even answers what would have been my next question!</p> <p>A <strong>BIG</strong> thanks!</p> <img src="https://test-devzone.nordicsemi.com/aggbug?PostID=1154&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">https://test-devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/difference-between-nrf52840-engineering-a-and-b-reWed, 17 Jan 2018 11:23:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8d513b6d-0d28-4880-b970-c6f5acdc23cfuser35000<p>Good question. I made some changes in the blog that I hope clarifies this.</p> <img src="https://test-devzone.nordicsemi.com/aggbug?PostID=1154&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">https://test-devzone.nordicsemi.com/nordic/nordic-blog/b/blog/posts/difference-between-nrf52840-engineering-a-and-b-reMon, 15 Jan 2018 15:45:52 GMT137ad170-7792-4731-bb38-c0d22fbe4515:8d513b6d-0d28-4880-b970-c6f5acdc23cfuser267830<p>In Engineering A, E24 is labeled DEC2, implying it&#39;s internally connected to A18 (DEC2), not B5 (DEC4) as mentioned in this note. In Engineering B, you now want E24 to be connected externally to B5, which seems to be a change in connectivity not just a reestablishment of the previously internal connection. So are you sure you want DEC6 (E24) connected to DEC4(B5) instead of it being connected DEC2(A18)?</p> <img src="https://test-devzone.nordicsemi.com/aggbug?PostID=1154&AppID=4&AppType=Weblog&ContentType=0" width="1" height="1">