Subversion Repositories ao486

module slow_mem(

    input               clk,

    input               rst_n,

    input       [9:0]   avs_address,

    input               avs_read,

    output      [7:0]   avs_readdata,

    input               avs_write,

    input       [7:0]   avs_writedata,

    output              avs_waitrequest

);

reg [5:0] wait_cnt;

always @(posedge clk or negedge rst_n) begin

    if(rst_n == 1'b0)   wait_cnt <= 6'd0;

    else                wait_cnt <= wait_cnt + 6'd1;

end

assign avs_waitrequest = ~(wait_cnt == 4'd0);

altsyncram line_ram_inst(

    .clock0     (clk),

    .address_a  (avs_address),

    .wren_a     (avs_write && ~(avs_waitrequest)),

    .data_a     (avs_writedata),

    .clock1     (clk),

    .address_b  (avs_address),

    .q_b        (avs_readdata)

);

defparam    line_ram_inst.operation_mode = "DUAL_PORT",

            line_ram_inst.width_a = 8,

            line_ram_inst.widthad_a = 10,

            line_ram_inst.width_b = 8,

            line_ram_inst.widthad_b = 10;

endmodule