https://devzone.nordicsemi.com/f/nordic-q-a/83694/spi-slave-mode-power-usageHi, when using the spi peripheral in slave configuration, what can I expect at power consumption level? does the spi peripheral derive its clock from an internal system clock (meaning zephyr will probably not enter its lowest power mode since thereen-USTelligent Community 13Tue, 18 Jan 2022 15:33:31 GMThttps://devzone.nordicsemi.com/thread/348346?ContentTypeID=1Tue, 18 Jan 2022 15:33:31 GMT137ad170-7792-4731-bb38-c0d22fbe4515:78193a11-ee5b-4e20-9377-92230d2fb06cdaan<p>Thanks ! It was indeed when the interface is idle (CS high)</p><div style="clear:both;"></div>https://devzone.nordicsemi.com/thread/348293?ContentTypeID=1Tue, 18 Jan 2022 13:21:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:5ee3e01b-cb67-4d5c-8e18-53ed746f0446ovrebekk<p>Hi&nbsp;</p> <p>Are you thinking about the current consumption while the SPI slave is in the middle of a transaction, or the current consumption when nothing is being sent and chip select is high?</p> <p>When the SPI slave is active it will use the internal high frequency clock, and current consumption will be relatively high.&nbsp;</p> <p>When the bus is idle the interface will not request the clock, and the current consumption in sleep will be similar to I_ON_RAMON_GPIOTE, which is documented for the nRF52840 <a href="https://infocenter.nordicsemi.com/topic/ps_nrf52840/_tmp/nrf52840/autodita/CURRENT/parameters.i_sleep.html?cp=4_0_0_4_1_0_0">here</a>.</p> <p>Best regards<br />Torbjørn&nbsp;</p><div style="clear:both;"></div>