cells/sdfsbp/sky130_fd_sc_hs__sdfsbp.functional.v

/*
 * Copyright 2020 The SkyWater PDK Authors
 *
 * 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
 *
 *     https://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
*/


`ifndef SKY130_FD_SC_HS__SDFSBP_FUNCTIONAL_V
`define SKY130_FD_SC_HS__SDFSBP_FUNCTIONAL_V

/**
 * sdfsbp: Scan delay flop, inverted set, non-inverted clock,
 *         complementary outputs.
 *
 * Verilog simulation functional model.
 */

`timescale 1ns / 1ps
`default_nettype none

// Import sub cells.
`include "../u_mux_2/sky130_fd_sc_hs__u_mux_2.v"
`include "../u_df_p_s_pg/sky130_fd_sc_hs__u_df_p_s_pg.v"

`celldefine
module sky130_fd_sc_hs__sdfsbp (
    VPWR ,
    VGND ,
    Q    ,
    Q_N  ,
    CLK  ,
    D    ,
    SCD  ,
    SCE  ,
    SET_B
);

    // Module ports
    input  VPWR ;
    input  VGND ;
    output Q    ;
    output Q_N  ;
    input  CLK  ;
    input  D    ;
    input  SCD  ;
    input  SCE  ;
    input  SET_B;

    // Local signals
    wire buf_Q  ;
    wire SET    ;
    wire mux_out;

    //                           Delay       Name          Output   Other arguments
    not                                      not0         (SET    , SET_B                        );
    sky130_fd_sc_hs__u_mux_2_1               u_mux_20     (mux_out, D, SCD, SCE                  );
    sky130_fd_sc_hs__u_df_p_s_pg `UNIT_DELAY u_df_p_s_pg0 (buf_Q  , mux_out, CLK, SET, VPWR, VGND);
    buf                                      buf0         (Q      , buf_Q                        );
    not                                      not1         (Q_N    , buf_Q                        );

endmodule
`endcelldefine

`default_nettype wire
`endif  // SKY130_FD_SC_HS__SDFSBP_FUNCTIONAL_V