What VCC_nRF stands for?

[Alice]

I"m trying to understand schematics for nRF24AP2. I'm very new to this, would you help? And I cannot google this abbreviation. And also where do i supposed to connect it? To vcc of Arduino?

[Einar Thorsrud]

VCC is normally used as the label for the positive supply voltage. In this case, VCC_nRF indicate the positive supply voltage for the nRF chip. If you are looking at the reference schematics you will see that VCC_nRF is connected to the VDD pins, and according to the spec VDD must be between 1.9 V and 3.6 V. Thus if the Vcc of your Arduiono is between 1.9 V and 3.6 V (and the supply can supply enough current), you should be able to connect it there.