| module u21_ref ( |
| input [3:0] func, |
| input [1:0] pin, |
| output [2:0] wiring |
| ); |
| |
| reg [11:0] w; |
| assign wiring = w[3*pin+:3]; |
| |
| always @ (func) begin |
| case (func) |
| 4'b0000 : w = 12'b000_000_000_000; |
| 4'b0001 : w = 12'b010_011_010_000; |
| 4'b0010 : w = 12'b011_010_000_000; |
| 4'b0011 : w = 12'b011_000_000_000; |
| 4'b0100 : w = 12'b010_011_000_000; |
| 4'b0101 : w = 12'b010_000_000_000; |
| 4'b0110 : w = 12'b011_000_010_000; |
| 4'b0111 : w = 12'b011_010_010_000; |
| 4'b1000 : w = 12'b011_010_010_001; |
| 4'b1001 : w = 12'b001_011_010_000; |
| 4'b1010 : w = 12'b001_010_000_000; |
| 4'b1011 : w = 12'b010_011_001_000; |
| 4'b1100 : w = 12'b001_011_000_000; |
| 4'b1101 : w = 12'b011_010_001_000; |
| 4'b1110 : w = 12'b010_011_010_001; |
| 4'b1111 : w = 12'b001_000_000_000; |
| endcase |
| end |
| |
| endmodule |
| |
