How to shutdown the nrf8001?

[biglocal]

Hi Sir, 

I use load switch circuit to control nrf8001's power.

I found even the vcc of nrf8001 is empty, nrf8001 still works.

That's not my expected result, I think nrf8001 gets energy from other PIN.

How to shutdown the nrf8001's from software?

Thanks.

[run_ar]

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.