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// True-Dual-Port BRAM with Byte-wide Write Enable
// Read-First mode
// bytewrite_tdp_ram_rf.v
//
module bytewrite_tdp_ram_rf
#(
//--------------------------------------------------------------------------
parameter NUM_COL = 4,
parameter COL_WIDTH = 8,
parameter ADDR_WIDTH = 10,
// Addr Width in bits : 2 *ADDR_WIDTH = RAM Depth
parameter DATA_WIDTH = NUM_COL*COL_WIDTH // Data Width in bits
//----------------------------------------------------------------------
) (
input clkA,
input enaA,
input [NUM_COL-1:0] weA,
input [ADDR_WIDTH-1:0] addrA,
input [DATA_WIDTH-1:0] dinA,
output reg [DATA_WIDTH-1:0] doutA,
input clkB,
input enaB,
input [NUM_COL-1:0] weB,
input [ADDR_WIDTH-1:0] addrB,
input [DATA_WIDTH-1:0] dinB,
output reg [DATA_WIDTH-1:0] doutB
);
// Core Memory
reg [DATA_WIDTH-1:0] ram_block [(2**ADDR_WIDTH)-1:0];
integer i;
// Port-A Operation
always @ (posedge clkA) begin
if(enaA) begin
for(i=0;i<NUM_COL;i=i+1) begin
if(weA[i]) begin
ram_block[addrA][i*COL_WIDTH +: COL_WIDTH] <= dinA[i*COL_WIDTH +: COL_WIDTH];
end
end
doutA <= ram_block[addrA];
end
end
// Port-B Operation:
always @ (posedge clkB) begin
if(enaB) begin
for(i=0;i<NUM_COL;i=i+1) begin
if(weB[i]) begin
ram_block[addrB][i*COL_WIDTH +: COL_WIDTH] <= dinB[i*COL_WIDTH +: COL_WIDTH];
end
end
doutB <= ram_block[addrB];
end
end
endmodule // bytewrite_tdp_ram_rf
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