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88 lines
2.6 KiB
Verilog
88 lines
2.6 KiB
Verilog
`default_nettype none
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module block_ram #(parameter DATA_WIDTH=4, ADDRESS_WIDTH=10)
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(input wire write_enable, clk,
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input wire [DATA_WIDTH-1:0] data_in,
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input wire [ADDRESS_WIDTH-1:0] address_in,
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output wire [DATA_WIDTH-1:0] data_out);
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localparam WORD = (DATA_WIDTH-1);
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localparam DEPTH = (2**ADDRESS_WIDTH-1);
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reg [WORD:0] data_out_r;
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reg [WORD:0] memory [0:DEPTH];
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always @(posedge clk) begin
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if (write_enable)
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memory[address_in] <= data_in;
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data_out_r <= memory[address_in];
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end
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assign data_out = data_out_r;
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endmodule // block_ram
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`default_nettype none
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module distributed_ram #(parameter DATA_WIDTH=8, ADDRESS_WIDTH=4)
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(input wire write_enable, clk,
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input wire [DATA_WIDTH-1:0] data_in,
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input wire [ADDRESS_WIDTH-1:0] address_in,
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output wire [DATA_WIDTH-1:0] data_out);
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localparam WORD = (DATA_WIDTH-1);
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localparam DEPTH = (2**ADDRESS_WIDTH-1);
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reg [WORD:0] data_out_r;
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reg [WORD:0] memory [0:DEPTH];
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always @(posedge clk) begin
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if (write_enable)
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memory[address_in] <= data_in;
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data_out_r <= memory[address_in];
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end
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assign data_out = data_out_r;
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endmodule // distributed_ram
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`default_nettype none
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module distributed_ram_manual #(parameter DATA_WIDTH=8, ADDRESS_WIDTH=4)
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(input wire write_enable, clk,
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input wire [DATA_WIDTH-1:0] data_in,
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input wire [ADDRESS_WIDTH-1:0] address_in,
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output wire [DATA_WIDTH-1:0] data_out);
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localparam WORD = (DATA_WIDTH-1);
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localparam DEPTH = (2**ADDRESS_WIDTH-1);
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reg [WORD:0] data_out_r;
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(* ram_style = "block" *) reg [WORD:0] memory [0:DEPTH];
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always @(posedge clk) begin
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if (write_enable)
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memory[address_in] <= data_in;
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data_out_r <= memory[address_in];
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end
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assign data_out = data_out_r;
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endmodule // distributed_ram
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`default_nettype none
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module distributed_ram_manual_syn #(parameter DATA_WIDTH=8, ADDRESS_WIDTH=4)
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(input wire write_enable, clk,
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input wire [DATA_WIDTH-1:0] data_in,
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input wire [ADDRESS_WIDTH-1:0] address_in,
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output wire [DATA_WIDTH-1:0] data_out);
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localparam WORD = (DATA_WIDTH-1);
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localparam DEPTH = (2**ADDRESS_WIDTH-1);
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reg [WORD:0] data_out_r;
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(* synthesis, ram_block *) reg [WORD:0] memory [0:DEPTH];
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always @(posedge clk) begin
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if (write_enable)
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memory[address_in] <= data_in;
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data_out_r <= memory[address_in];
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end
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assign data_out = data_out_r;
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endmodule // distributed_ram
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