verilog/rtl/generic_sram_1rw1r_8x1024.v

////////////////////////////////////////////////////////////////////////////
// SPDX-FileCopyrightText: 2022 , Julien OURY                       
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// SPDX-License-Identifier: Apache-2.0
// SPDX-FileContributor: Created by Julien OURY <julien.oury@outlook.fr>
//
////////////////////////////////////////////////////////////////////////////
module generic_sram_1rw1r_8x1024 #(
  parameter TECHNO = 1        // TECHNO RAM (0:inferred, 1:SkyWater)
)(
`ifdef USE_POWER_PINS
  inout  wire       vccd1   , // User area 1 1.8V supply
  inout  wire       vssd1   , // User area 1 digital ground
`endif
  input  wire       clk     , // Clock (rising edge)

  // Port 0 (R/W)   
  input  wire       cs0_n   , // Chip select (active low)
  input  wire       we0_n   , // Write enable (active low)
  input  wire [9:0] addr0   , // Adress bus
  input  wire [7:0] wdata0  , // Data bus (write)
  output wire [7:0] rdata0  , // Data bus (read)

  // Port 1 (R/W)   
  input  wire       cs1_n   , // Chip select (active low)
  input  wire [9:0] addr1   , // Adress bus
  output wire [7:0] rdata1    // Data bus (read)
);

generate
  case (TECHNO)
    0 : begin : inferred
      inferred_sram_1rw1r_8x1024 sram (
        .clk   (clk   ),
        .cs0_n (cs0_n ),
        .we0_n (we0_n ),
        .addr0 (addr0 ),
        .wdata0(wdata0),
        .rdata0(rdata0),
        .cs1_n (cs1_n ),
        .addr1 (addr1 ),
        .rdata1(rdata1)
      );
    end
    1 : begin : skywater
      sky130_sram_1kbyte_1rw1r_8x1024_8 sram (
      `ifdef USE_POWER_PINS
        .vccd1(vccd1),
        .vssd1(vssd1),
      `endif
        .clk0  (clk   ),
        .csb0  (cs0_n ),
        .web0  (we0_n ),
        .wmask0(1'b1  ),
        .addr0 (addr0 ),
        .din0  (wdata0),
        .dout0 (rdata0),
        .clk1  (clk   ),
        .csb1  (cs1_n ),
        .addr1 (addr1 ),
        .dout1 (rdata1)
      );
    end
  endcase
endgenerate


endmodule