LOCATE COMP "ext_clk" SITE "A10";
IOBUF PORT "ext_clk" IO_TYPE=LVCMOS33;

LOCATE COMP "ext_rst" SITE "P4";
IOBUF PORT "rst" IO_TYPE=LVCMOS33;

LOCATE COMP "uart0_txd" SITE "P3";
LOCATE COMP "uart0_rxd" SITE "P2";

IOBUF PORT "uart0_txd" IO_TYPE=LVCMOS33;
IOBUF PORT "uart0_rxd" IO_TYPE=LVCMOS33;

LOCATE COMP "led_a" SITE "A13";
LOCATE COMP "led_b" SITE "A12";
LOCATE COMP "led_c" SITE "B19";

IOBUF PORT "led_a" IO_TYPE=LVCMOS25;
IOBUF PORT "led_b" IO_TYPE=LVCMOS25;
IOBUF PORT "led_c" IO_TYPE=LVCMOS25;