https://devzone.nordicsemi.com/f/nordic-q-a/20060/spi-vs-twi-current-consumptionHello, i am working on Low current consumption project. i have one question. what will be the good option to use the SPI or TWI ? who have less current consumption ? i have sensor in both option TWI and SPI.now i need to consider the current consumptionen-USTelligent Community 13Wed, 01 Mar 2017 12:55:13 GMThttps://devzone.nordicsemi.com/thread/78072?ContentTypeID=1Wed, 01 Mar 2017 12:55:13 GMT137ad170-7792-4731-bb38-c0d22fbe4515:d008c11e-4759-4690-b36b-72072fb80aa7Stian R&#248;ed Hafskjold<p>The active base current should be similar for both TWI and SPI. So then it&#39;s all about how fast you are able to transmit the bytes. SPI can go as fast as 8Mbps, so therefore the total current will be a lot less than with TWI which has a max speed of 400kbps. I guess it then depends on the max speed on the slave you are using.</p> <p>Other things you should be aware of is that the active current is also dependent on the pin capacitance, with this formula: <code>I = f * V * C</code>. Where f is frequency, V is voltage, and C is capacitance. So with an 8 MHz SCK signal the capacitive load will have a significant impact on the current. A good PCB design is therefore critical. However, this will most likely not be more current than what you will gain with the faster speed.</p><div style="clear:both;"></div>