AHB APB 简单通讯架构 代码 Decoder

译码器

module Decoder
#(parameter width = 32)(
input wire [width-1:0] DAT0,
input wire [width-1:0] DAT1,
input wire [width-1:0] DAT2,
input wire [width-1:0] DAT3,
output reg [width-1:0] DATo,
input wire [3:0]  MASTER
);


always @(*)
begin
  case(MASTER)
    4'h0:     DATo = DAT0;
    4'h1:     DATo = DAT1;
    4'h2:     DATo = DAT2;
    4'h3:     DATo = DAT3;
    default:  DATo = 0;
  endcase
end

endmodule