interface counter_if(input logic clk);

	logic rst, updown, load;
	logic [3:0] data;
	logic [3:0] data_out;

	clocking wr_cb@(posedge clk);
		output load, updown, rst;
		output data;
	endclocking

	clocking wrmon_cb@(posedge clk);
		input data;
		input load, rst, updown;
	endclocking

	clocking rdmon_cb@(posedge clk);
		input data_out;
	endclocking

	modport WR_BFM(clocking wr_cb);
	modport WR_MON(clocking wrmon_cb);
	modport RD_MON(clocking rdmon_cb);
	
endinterface: counter_if