| /* |
| * 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_MS__SDFRTN_BEHAVIORAL_PP_V |
| `define SKY130_FD_SC_MS__SDFRTN_BEHAVIORAL_PP_V |
| |
| /** |
| * sdfrtn: Scan delay flop, inverted reset, inverted clock, |
| * single output. |
| * |
| * Verilog simulation functional model. |
| */ |
| |
| `timescale 1ns / 1ps |
| `default_nettype none |
| |
| // Import user defined primitives. |
| `include "../../models/udp_mux_2to1/sky130_fd_sc_ms__udp_mux_2to1.v" |
| `include "../../models/udp_dff_pr_pp_pg_n/sky130_fd_sc_ms__udp_dff_pr_pp_pg_n.v" |
| |
| `celldefine |
| module sky130_fd_sc_ms__sdfrtn ( |
| Q , |
| CLK_N , |
| D , |
| SCD , |
| SCE , |
| RESET_B, |
| VPWR , |
| VGND , |
| VPB , |
| VNB |
| ); |
| |
| // Module ports |
| output Q ; |
| input CLK_N ; |
| input D ; |
| input SCD ; |
| input SCE ; |
| input RESET_B; |
| input VPWR ; |
| input VGND ; |
| input VPB ; |
| input VNB ; |
| |
| // Local signals |
| wire buf_Q ; |
| wire RESET ; |
| wire intclk ; |
| wire mux_out ; |
| reg notifier ; |
| wire D_delayed ; |
| wire SCD_delayed ; |
| wire SCE_delayed ; |
| wire RESET_B_delayed; |
| wire CLK_N_delayed ; |
| wire awake ; |
| wire cond0 ; |
| wire cond1 ; |
| wire cond2 ; |
| wire cond3 ; |
| wire cond4 ; |
| |
| // Name Output Other arguments |
| not not0 (RESET , RESET_B_delayed ); |
| not not1 (intclk , CLK_N_delayed ); |
| sky130_fd_sc_ms__udp_mux_2to1 mux_2to10 (mux_out, D_delayed, SCD_delayed, SCE_delayed ); |
| sky130_fd_sc_ms__udp_dff$PR_pp$PG$N dff0 (buf_Q , mux_out, intclk, RESET, notifier, VPWR, VGND); |
| assign awake = ( VPWR === 1'b1 ); |
| assign cond0 = ( awake && ( RESET_B_delayed === 1'b1 ) ); |
| assign cond1 = ( ( SCE_delayed === 1'b0 ) && cond0 ); |
| assign cond2 = ( ( SCE_delayed === 1'b1 ) && cond0 ); |
| assign cond3 = ( ( D_delayed !== SCD_delayed ) && cond0 ); |
| assign cond4 = ( awake && ( RESET_B === 1'b1 ) ); |
| buf buf0 (Q , buf_Q ); |
| |
| endmodule |
| `endcelldefine |
| |
| `default_nettype wire |
| `endif // SKY130_FD_SC_MS__SDFRTN_BEHAVIORAL_PP_V |