SDK15.2 PCA10056 SPI example - change SCLK pin to 0.21https://devzone.nordicsemi.com/f/nordic-q-a/40649/sdk15-2-pca10056-spi-example---change-sclk-pin-to-0-21I&#39;m trying to use Pin 0.21 as SCLK in the SDK15.2/examples/peripheral/spi/pca10056/blank/ses. The example works fine with CLK on pin 3 (default) and on pin 29 (just tried something else). However, on pin 21 I do not get any activity on CLK line - inen-USTelligent Community 13Tue, 20 Nov 2018 12:59:03 GMTRE: SDK15.2 PCA10056 SPI example - change SCLK pin to 0.21https://devzone.nordicsemi.com/thread/158178?ContentTypeID=1Tue, 20 Nov 2018 12:59:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:035212fc-34c5-4e87-a907-d69fd9218b3fMarjeris Romero<p>Hi,</p> <p>Pins P0.17 and P0.19-P0.23 are by default connected to the 64 Mb external flash memory using QSPI. See the GPIO usage <a href="https://infocenter.nordicsemi.com/index.jsp?topic=%2Fcom.nordic.infocenter.nrf52%2Fdita%2Fnrf52%2Fdevelopment%2Fnrf52840_pdk%2Fhw_external_memory.html&amp;anchor=external_memory">here</a>. To use the GPIOs for another purpose and have them available in the P24 connector you need to cut six solder bridges (SB10-SB15) and six solder bridges must be shorted (SB20-SB25).</p> <p>The solder bridge information is also printed on the back of the DK board.</p> <p>Best Regards,</p> <p>Marjeris</p><div style="clear:both;"></div>