https://devzone.nordicsemi.com/f/nordic-q-a/26345/psel-sck-psel-mosi-and-psel-miso-must-only-be-configured-when-the-spi-master-is-disabledNot sure I understand the sentence. Do you guys mean &quot;enabled&quot;? PSEL.SCK, PSEL.MOSI and PSEL.MISO must only be configured when the SPI master is disabled. infocenter.nordicsemi.com/index.jsp I saw a similar sentence in TWIM documentationen-USTelligent Community 13Fri, 27 Oct 2017 02:34:47 GMThttps://devzone.nordicsemi.com/thread/103652?ContentTypeID=1Fri, 27 Oct 2017 02:34:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:f8a0e3d9-a8f5-41da-a962-e87be106f484Filipp<p>Gotcha - thanks!</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/103651?ContentTypeID=1Fri, 27 Oct 2017 02:32:04 GMT137ad170-7792-4731-bb38-c0d22fbe4515:600d70b9-4df6-4b90-9d49-3c193697e83fRK<p>no it means disabled. You have to set the pin configurations before you enable the peripheral</p><div style="clear:both;"></div>