| /** |
| * 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_HD__O41AI_TB_V |
| `define SKY130_FD_SC_HD__O41AI_TB_V |
| |
| /** |
| * o41ai: 4-input OR into 2-input NAND. |
| * |
| * Y = !((A1 | A2 | A3 | A4) & B1) |
| * |
| * Autogenerated test bench. |
| * |
| * WARNING: This file is autogenerated, do not modify directly! |
| */ |
| |
| `timescale 1ns / 1ps |
| `default_nettype none |
| |
| `include "sky130_fd_sc_hd__o41ai.v" |
| |
| module top(); |
| |
| // Inputs are registered |
| reg A1; |
| reg A2; |
| reg A3; |
| reg A4; |
| reg B1; |
| reg VPWR; |
| reg VGND; |
| reg VPB; |
| reg VNB; |
| |
| // Outputs are wires |
| wire Y; |
| |
| initial |
| begin |
| // Initial state is x for all inputs. |
| A1 = 1'bX; |
| A2 = 1'bX; |
| A3 = 1'bX; |
| A4 = 1'bX; |
| B1 = 1'bX; |
| VGND = 1'bX; |
| VNB = 1'bX; |
| VPB = 1'bX; |
| VPWR = 1'bX; |
| |
| #20 A1 = 1'b0; |
| #40 A2 = 1'b0; |
| #60 A3 = 1'b0; |
| #80 A4 = 1'b0; |
| #100 B1 = 1'b0; |
| #120 VGND = 1'b0; |
| #140 VNB = 1'b0; |
| #160 VPB = 1'b0; |
| #180 VPWR = 1'b0; |
| #200 A1 = 1'b1; |
| #220 A2 = 1'b1; |
| #240 A3 = 1'b1; |
| #260 A4 = 1'b1; |
| #280 B1 = 1'b1; |
| #300 VGND = 1'b1; |
| #320 VNB = 1'b1; |
| #340 VPB = 1'b1; |
| #360 VPWR = 1'b1; |
| #380 A1 = 1'b0; |
| #400 A2 = 1'b0; |
| #420 A3 = 1'b0; |
| #440 A4 = 1'b0; |
| #460 B1 = 1'b0; |
| #480 VGND = 1'b0; |
| #500 VNB = 1'b0; |
| #520 VPB = 1'b0; |
| #540 VPWR = 1'b0; |
| #560 VPWR = 1'b1; |
| #580 VPB = 1'b1; |
| #600 VNB = 1'b1; |
| #620 VGND = 1'b1; |
| #640 B1 = 1'b1; |
| #660 A4 = 1'b1; |
| #680 A3 = 1'b1; |
| #700 A2 = 1'b1; |
| #720 A1 = 1'b1; |
| #740 VPWR = 1'bx; |
| #760 VPB = 1'bx; |
| #780 VNB = 1'bx; |
| #800 VGND = 1'bx; |
| #820 B1 = 1'bx; |
| #840 A4 = 1'bx; |
| #860 A3 = 1'bx; |
| #880 A2 = 1'bx; |
| #900 A1 = 1'bx; |
| end |
| |
| sky130_fd_sc_hd__o41ai dut (.A1(A1), .A2(A2), .A3(A3), .A4(A4), .B1(B1), .VPWR(VPWR), .VGND(VGND), .VPB(VPB), .VNB(VNB), .Y(Y)); |
| |
| endmodule |
| |
| `default_nettype wire |
| `endif // SKY130_FD_SC_HD__O41AI_TB_V |