https://devzone.nordicsemi.com/f/nordic-q-a/5080/spi-pin-numberI use pin SDIN, SCLK, CS, DC. but how do I connect the pin nrf51822 spi_master_example is #define SPIM0_SCK_PIN 25u /**&lt; SPI clock GPIO pin number. */ #define SPIM0_MOSI_PIN 20u /**&lt; SPI Master Out Slave In GPIO pin number. */ #define SPIM0_MISO_PINen-USTelligent Community 13Tue, 13 Jan 2015 04:08:32 GMThttps://devzone.nordicsemi.com/thread/17861?ContentTypeID=1Tue, 13 Jan 2015 04:08:32 GMT137ad170-7792-4731-bb38-c0d22fbe4515:bd35ad78-9bb1-4850-9cf5-7722103d9104GunMin<p>Pin Number 23 and 23u, how is it different?</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/17862?ContentTypeID=1Mon, 12 Jan 2015 14:57:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:831198a9-03fe-4db7-aab1-ad03ee650337Stefan Birnir Sverrisson<p>Hi</p> <p>What nRF51 development kit do you have? What are the pins SDIN, SCLK, CS, DC? Is that on another device than the nRF51? Can you clarify a little your question.</p><div style="clear:both;"></div>