blob: 40bd56b6769365e00123687b99b7f9d8e6e43243 [file] [log] [blame]
/*
* 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__SDFSTP_BEHAVIORAL_PP_V
`define SKY130_FD_SC_HS__SDFSTP_BEHAVIORAL_PP_V
/**
* sdfstp: Scan delay flop, inverted set, non-inverted clock,
* single output.
*
* 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_no_pg/sky130_fd_sc_hs__u_df_p_s_no_pg.v"
`celldefine
module sky130_fd_sc_hs__sdfstp (
VPWR ,
VGND ,
Q ,
CLK ,
D ,
SCD ,
SCE ,
SET_B
);
// Module ports
input VPWR ;
input VGND ;
output Q ;
input CLK ;
input D ;
input SCD ;
input SCE ;
input SET_B;
// Local signals
wire buf_Q ;
wire SET ;
wire mux_out ;
reg notifier ;
wire D_delayed ;
wire SCD_delayed ;
wire SCE_delayed ;
wire SET_B_delayed;
wire CLK_delayed ;
wire awake ;
wire cond0 ;
wire cond1 ;
wire cond2 ;
wire cond3 ;
wire cond4 ;
// Name Output Other arguments
not not0 (SET , SET_B_delayed );
sky130_fd_sc_hs__u_mux_2_1 u_mux_20 (mux_out, D_delayed, SCD_delayed, SCE_delayed );
sky130_fd_sc_hs__u_df_p_s_no_pg u_df_p_s_no_pg0 (buf_Q , mux_out, CLK_delayed, SET, notifier, VPWR, VGND);
assign awake = ( VPWR === 1'b1 );
assign cond0 = ( ( SET_B_delayed === 1'b1 ) && awake );
assign cond1 = ( ( SCE_delayed === 1'b0 ) && cond0 );
assign cond2 = ( ( SCE_delayed === 1'b1 ) && cond0 );
assign cond3 = ( ( D_delayed !== SCD_delayed ) && cond0 );
assign cond4 = ( ( SET_B === 1'b1 ) && awake );
buf buf0 (Q , buf_Q );
endmodule
`endcelldefine
`default_nettype wire
`endif // SKY130_FD_SC_HS__SDFSTP_BEHAVIORAL_PP_V