Data Memory

/*!
 * MIPS32SOC data memory (2048 words)
 * @type ram
 * @size 2048
 * @data_bits 32
 */
module DataMem(
    input clk, //! Clock input
    input en, //! Enable
    input [3:0] we, //! Per byte write enable
    input [10:0] addr, //! Address
    input [31:0] wd, //! Write data
    output [31:0] rd //! Read data
);

    reg [31:0] memory[0:2047];

    assign rd = en? memory[addr] : 32'hz;

    always @(posedge clk)
    begin
        if (en) begin
            if (we[3]) memory[addr][7:0] <= wd[7:0];
            if (we[2]) memory[addr][15:8] <= wd[15:8];
            if (we[1]) memory[addr][23:16] <= wd[23:16];
            if (we[0]) memory[addr][31:24] <= wd[31:24];
        end
    end

`ifndef DIGITAL
    initial begin
        $readmemh("data.mif", memory, 0, 1023);
    end
`endif
endmodule