Xilinx Property FAST

Use FAST to selectively set fast slew rate on a pin-by-pin basis for any output or I/O signal. The default slew rate for the design is otherwise controlled by fitter options. Use the following syntax:

xilinx property ‘FAST signal_list’;

For example, to set selective pins to fast slew rate, use the following:

xilinx property ‘FAST out0 out1’;