https://devzone.nordicsemi.com/f/nordic-q-a/69078/error-while-implementing-spi1-on-nrf5340pdk-on-secure-and-non-secureNCS 1.4.0 SES 5.10D Board nrf5340pdk Windows 10 Pro 64bit 1. Made a copy of hello world (hello_world_2) and made sure it builds and runs fine 2. Added SPI1 based loop back code from here based on this devzone ticket if I use secure build I geten-USTelligent Community 13Fri, 04 Dec 2020 00:18:43 GMThttps://devzone.nordicsemi.com/thread/283217?ContentTypeID=1Fri, 04 Dec 2020 00:18:43 GMT137ad170-7792-4731-bb38-c0d22fbe4515:840f103c-66a9-46b4-b4f9-b7b2f169ade6sshenoy105<p>this ticket can be closed.. The issue was dk vs pdk while opening the project and i confirm that after that change, everything works.. Thank you and you can close the ticket</p><div style="clear:both;"></div>