https://devzone.nordicsemi.com/f/nordic-q-a/47575/nrf52811-wiring-diagram-and-further-configurationHi guys, I am a newbie in nRF but with some experiences in embedded systems . I have just been asked to work on a project that connects a nRF52811 to a nRF91. I initially went through the documents but as more as I read as more as I became baffleden-USTelligent Community 13Tue, 21 May 2019 12:58:34 GMThttps://devzone.nordicsemi.com/thread/188279?ContentTypeID=1Tue, 21 May 2019 12:58:34 GMT137ad170-7792-4731-bb38-c0d22fbe4515:02b09f00-084c-459c-a1d1-c34a0a48872dAndreas<p>Hi,</p> <p>&nbsp;</p> <p>Take a look at the <a href="https://www.nordicsemi.com/Software-and-Tools/Development-Kits/nRF9160-DK/Download#infotabs">nRF91 DK HW files</a>, it uses nRF52840 but you can replace sheet 2 (the sheet that contains the nRF52840 circuitry) with the <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52811/ref_circuitry.html?cp=3_2_0_6_2">nRF52811 reference design</a>.</p> <p>&nbsp;</p> <p>Common for all Nordic products is that no pins are dedicated to any digital peripherals, they can be assigned to any GPIO. Analog peripherals are limited to any of the &#39;analog&#39; GPIOs,&nbsp;indicated as &#39;AINx&#39; in the pinout and reference designs.</p> <p>&nbsp;</p> <p>There are multiple examples showing implementation using UART and SPI in our SDK, see under <a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/spi_slave_example.html?cp=5_1_4_6_39">/examples/peripheral/SPI</a> or&nbsp;<span><a href="https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/uart_example.html?cp=5_1_4_6_48">/examples/peripheral/UART</a>.</span></p> <p><span>&nbsp;</span></p> <p><span>Best regards,</span></p> <p><span>Andreas</span></p><div style="clear:both;"></div>