https://devzone.nordicsemi.com/f/nordic-q-a/77466/default-spi-pins-from-examples-provided-are-standard-drive-low-frequency-i-o-onlyHi, I saw on this answer that the pins for SPI should be chosen among non &quot;Standard drive, low frequency I/O only&quot;. But from the default ones only SCK is not low frequency pin, rest are. Why this is the case? Default pin assignment: SPI_SCK_PINen-USTelligent Community 13Wed, 14 Jul 2021 12:12:08 GMThttps://devzone.nordicsemi.com/thread/320004?ContentTypeID=1Wed, 14 Jul 2021 12:12:08 GMT137ad170-7792-4731-bb38-c0d22fbe4515:fdc19fd0-712a-41ed-8217-c8a4bc0a1c0bKarl Ylvisaker<p>Hello,</p> [quote user=""]But from the default ones only SCK is not low frequency pin, rest are. Why this is the case?[/quote] <p>By default pin assignment I assume you are referring to the pin&#39;s in the SPI examples?<br />If so, this is done because the SPI examples in the SDK does not use the SoftDevice (or any radio functionality for that matter) - so you are then free to disregard the low-frequency recommendation, since the signal on these pins will not degrade radio performance anyways.<br />Theoretically, while any of the GPIO&#39;s could have been used, <a href="https://infocenter.nordicsemi.com/topic/ug_nrf52840_dk/UG/dk/connector_if.html">a lot of them are already in use for other functionality on the DK</a>.<br /><br />Please be advised that any GPIO&#39;s&nbsp;<em>can</em> be used for the SPI peripheral, but you should follow the guidance of the referenced Pin Assignment in the Product Specification to avoid degrading radio performance.<br /><br />Best regards,<br />Karl</p><div style="clear:both;"></div>