https://devzone.nordicsemi.com/f/nordic-q-a/61517/spi-csDear Sir. I am using SPI as follows. gpio_pin_write(dev_io, LIS2DH12_CS_PIN, false); err = spi_transceive(spi_dev1, &amp;spi_cfg1, &amp;tx, &amp;rx); gpio_pin_write(dev_io, LIS2DH12_CS_PIN, true); In this case 2 spi bytes are sent. the CS length containsen-USTelligent Community 13Wed, 20 May 2020 14:10:03 GMThttps://devzone.nordicsemi.com/thread/251025?ContentTypeID=1Wed, 20 May 2020 14:10:03 GMT137ad170-7792-4731-bb38-c0d22fbe4515:494bbe7b-1576-4c9b-b5fd-87c8997f5bf0frax84<p>Hi,</p> <p>you should share the part of code for &quot;tx&quot; and &quot;rx&quot; spi_buf_set setup&nbsp;to allow better support.</p> [quote userid="2115" url="~/f/nordic-q-a/61517/spi-cs/250728"]I would also recommend providing the CSN pin as an input to the spi config (struct spi_config), member .csn[/quote] <p>I&#39;m using this setting with success. With this, CS management is done by the nrf9160.</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/250728?ContentTypeID=1Tue, 19 May 2020 12:49:37 GMT137ad170-7792-4731-bb38-c0d22fbe4515:80d85b6d-ac20-45e8-9d45-32d614772bb9H&#229;kon Alseth<p>Hi,</p> <p>&nbsp;</p> <p>Is your SPI configured as asynchronous? You can check this via config &quot;CONFIG_SPI_ASYNC&quot;. I would also recommend providing the CSN pin as an input to the spi config (struct spi_config), member .csn, to see if this helps.</p> <p>&nbsp;</p> <p>Kind regards,</p> <p>Håkon</p><div style="clear:both;"></div>