https://devzone.nordicsemi.com/f/nordic-q-a/45305/nrf9160-application-firmware-vs-modem-firmwareI have a question about what functionality is handled in the modem firmware vs. the application firmware. I see from the nRF Connect SDK that the nRF9160 application communicates with the LTE modem using sockets: What networking functionality isen-USTelligent Community 13Fri, 28 Feb 2020 06:15:21 GMThttps://devzone.nordicsemi.com/thread/237016?ContentTypeID=1Fri, 28 Feb 2020 06:15:21 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c19cf01d-8f74-41da-9653-e971292ca88ckk2mkk<p>I got the answer both Modem and application cores are different</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/communityserver-discussions-components-files/4/pastedimage1582870510623v1.png" alt=" " /></p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/236776?ContentTypeID=1Thu, 27 Feb 2020 10:24:30 GMT137ad170-7792-4731-bb38-c0d22fbe4515:7a7ee8d4-46e5-422b-aba9-59284c165f05kk2mkk<p>So, the modem and application firmware runs in two different processors? M33 is for user application(stacks, libs, Zephyr etc)?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/178052?ContentTypeID=1Mon, 25 Mar 2019 10:20:25 GMT137ad170-7792-4731-bb38-c0d22fbe4515:66dbbc1e-d343-46ce-8c54-6b78edd46443Martin Lesund<p>Hi Erik,</p> <p>So the nRF91 System on Chip which is located inside the nRF9160 System in Package has a separate Application and Modem &quot;side&quot;.</p> <p></p> <p></p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-eb1bee63cf4247c3add673620562d0c7/pastedimage1553506698561v1.png" alt=" " /><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-eb1bee63cf4247c3add673620562d0c7/pastedimage1553509147674v2.png" alt=" " /></p> <p>The nRF9160<strong> LTE modem</strong> integrates RFFE, radio and baseband. It supports operation worldwide, enabling cIoT products without regional specific variants. The LTE modem supports half-duplex FDD operation and all power saving and coverage enhancement modes. A single pin antenna interface is available.</p> <p>The LTE modem integrates IPv4/IPv6 stack layers up to transport and security (ex. TCP/TLS).&nbsp;</p> <hr /> <p>IP application layer protocols are located in the <strong>application processor</strong>, making it easy for a developer to select application protocols and device profiles supported by the chosen cloud service.</p> <p><img src="https://devzone.nordicsemi.com/resized-image/__size/320x240/__key/support-attachments/beef5d1b77644c448dabff31668f3a47-eb1bee63cf4247c3add673620562d0c7/pastedimage1553525051980v1.png" alt=" " /></p><div style="clear:both;"></div>