https://devzone.nordicsemi.com/f/nordic-q-a/34412/how-to-shutdown-the-nrf8001Hi Sir, I use load switch circuit to control nrf8001&#39;s power. I found even the vcc of nrf8001 is empty, nrf8001 still works. That&#39;s not my expected result, I think nrf8001 gets energy from other PIN. How to shutdown the nrf8001&#39;s from software? Thanksen-USTelligent Community 13Wed, 23 May 2018 07:29:46 GMThttps://devzone.nordicsemi.com/thread/132886?ContentTypeID=1Wed, 23 May 2018 07:29:46 GMT137ad170-7792-4731-bb38-c0d22fbe4515:ef4ef18b-3d2e-4f06-9a64-73e7f2eb14e7run_ar<p>As per the product specification you need to make sure the input pins are in a defined state. i.e. MOSI, REQN, CLK. If you turn off the power to the vcc lines you might also have to make sure the output pins are set in a defined state so they are not floating on the application mcu.</p><div style="clear:both;"></div>