LOCATE COMP "clk" SITE "P3";
IOBUF PORT "clk" IO_TYPE=LVCMOS33;
FREQUENCY PORT "clk" 25 MHZ;
LOCATE COMP "key" SITE "P4";
IOBUF PORT "key" IO_TYPE=LVCMOS33;
LOCATE COMP "led_o" SITE "U16";
IOBUF PORT "led_o" IO_TYPE=LVCMOS33;