| /** |
| * 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_LS__AND4_TB_V |
| `define SKY130_FD_SC_LS__AND4_TB_V |
| |
| /** |
| * and4: 4-input AND. |
| * |
| * Autogenerated test bench. |
| * |
| * WARNING: This file is autogenerated, do not modify directly! |
| */ |
| |
| `timescale 1ns / 1ps |
| `default_nettype none |
| |
| `include "sky130_fd_sc_ls__and4.v" |
| |
| module top(); |
| |
| // Inputs are registered |
| reg A; |
| reg B; |
| reg C; |
| reg D; |
| reg VPWR; |
| reg VGND; |
| reg VPB; |
| reg VNB; |
| |
| // Outputs are wires |
| wire X; |
| |
| initial |
| begin |
| // Initial state is x for all inputs. |
| A = 1'bX; |
| B = 1'bX; |
| C = 1'bX; |
| D = 1'bX; |
| VGND = 1'bX; |
| VNB = 1'bX; |
| VPB = 1'bX; |
| VPWR = 1'bX; |
| |
| #20 A = 1'b0; |
| #40 B = 1'b0; |
| #60 C = 1'b0; |
| #80 D = 1'b0; |
| #100 VGND = 1'b0; |
| #120 VNB = 1'b0; |
| #140 VPB = 1'b0; |
| #160 VPWR = 1'b0; |
| #180 A = 1'b1; |
| #200 B = 1'b1; |
| #220 C = 1'b1; |
| #240 D = 1'b1; |
| #260 VGND = 1'b1; |
| #280 VNB = 1'b1; |
| #300 VPB = 1'b1; |
| #320 VPWR = 1'b1; |
| #340 A = 1'b0; |
| #360 B = 1'b0; |
| #380 C = 1'b0; |
| #400 D = 1'b0; |
| #420 VGND = 1'b0; |
| #440 VNB = 1'b0; |
| #460 VPB = 1'b0; |
| #480 VPWR = 1'b0; |
| #500 VPWR = 1'b1; |
| #520 VPB = 1'b1; |
| #540 VNB = 1'b1; |
| #560 VGND = 1'b1; |
| #580 D = 1'b1; |
| #600 C = 1'b1; |
| #620 B = 1'b1; |
| #640 A = 1'b1; |
| #660 VPWR = 1'bx; |
| #680 VPB = 1'bx; |
| #700 VNB = 1'bx; |
| #720 VGND = 1'bx; |
| #740 D = 1'bx; |
| #760 C = 1'bx; |
| #780 B = 1'bx; |
| #800 A = 1'bx; |
| end |
| |
| sky130_fd_sc_ls__and4 dut (.A(A), .B(B), .C(C), .D(D), .VPWR(VPWR), .VGND(VGND), .VPB(VPB), .VNB(VNB), .X(X)); |
| |
| endmodule |
| |
| `default_nettype wire |
| `endif // SKY130_FD_SC_LS__AND4_TB_V |