https://devzone.nordicsemi.com/f/nordic-q-a/4387/nrf51-series-reference-manual-v3-0-is-missing-appendix-aA lot of the SoftDevice documentation I have been reading indicates that &quot;Appendix A: SoftDevice architecture” in the nRF51 Series Reference Manual is prerequisite reading but I couldn&#39;t find this Appendix in the reference manual that I had downloadeden-USTelligent Community 13Tue, 11 Nov 2014 10:01:21 GMThttps://devzone.nordicsemi.com/thread/15570?ContentTypeID=1Tue, 11 Nov 2014 10:01:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:85375b4f-f535-45b6-afab-4a745f4a177dAsbj&#248;rn<p>You are correct in your observations. We are shuffling around a little bit on this information and we are placing it in the various softdevice specifications instead. Unfortunately the latest reference manual was posted before the updates were done to the softdevice specifications.</p> <p>We have our technical writer team on the case. <a href="https://www.nordicsemi.com/eng/nordic/Products/nRF51822/nRF51-RM/20337">In the mean time we would ask you to enjoy the Appendix A in the older revision of the reference manual that you have linked to.</a></p><div style="clear:both;"></div>