How can I define FPGA pin as data input in simulink model?

Hello Everyone,

I am a new FPGA model-based design learner. Thus, finding what I want is still a puzzle for me. I am studying on Spartan-7 xc7S50-1csga324. I want to read a slider state and switch on a led. In order to do that, I am generating the hdl code using system generator and going to vivaldo so as to have bitstream file. However, I have a problem about defining input pin while using Gateway In.

I have defined the pin location, but I have no idea what is IO standarts and how I must define it.

I am posting a image of the Gateway In setting and showing where I am asking about.

Regards

Fahri