https://devzone.nordicsemi.com/f/nordic-q-a/36168/spi-power-consumptionWe are using the 52840 chip SPI interface in slave mode and communicating at about 8MHz are noticing that during periods of innactivity with all systems stopped and sleeping we are seeing 15-20 microamps of current draw. I we disable the SPI port we geten-USTelligent Community 13Tue, 09 Nov 2021 10:29:49 GMThttps://devzone.nordicsemi.com/thread/338120?ContentTypeID=1Tue, 09 Nov 2021 10:29:49 GMT137ad170-7792-4731-bb38-c0d22fbe4515:dc0330e3-97b0-411f-9218-94d14c6ae95bRomain<p>Hi,</p> <p>For our application we need ultra low power consumption too.</p> <p>Previously we used the nRF8001 and were able to achieve around 15uA when there was no active communication on SPI for the whole device (MCU host + nRF), now we are more around 25-30uA in comparison.</p> <p>I found different posts on that topic but more based on nRF5 SDK as here.</p> <p>Should Zephyr/NCS better manage the SPIS to achieve near zero current (less than 5uA) or is it still necessary to disable SPIS when possible (wakeup by port interrupt on CNS pin) ?</p> <p>Best regards,</p> <p>Romain</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/140203?ContentTypeID=1Mon, 16 Jul 2018 12:48:38 GMT137ad170-7792-4731-bb38-c0d22fbe4515:c7f0796e-701f-48d9-8928-9db13155c76aStian R&#248;ed Hafskjold<p>The SPIS peripheral consumes about 20 uA in idle in order to detect the CSN signal. If you want lower power consumption I think the solution is to use the GPIO PORT event to trigger on the CSN pin, initialize the SPIS and then disable SPIS before going to sleep.</p><div style="clear:both;"></div>