試題詳解

5 若欲使用 Verilog 語言合成（synthesize）出與下圖相同功能的電路，則下列各 Verilog 模組何者正確？ 
(A)module TestCircuit (A, B, C, clock, X, Y);input A;input B;input C;input clock;output X;output Y;reg X; reg Y;always @(posedge clock) X <= A | B;always @(B or C) Y = B & C; endmodule
(B)module TestCircuit (A, B, C, clock, X, Y);input A;input B;input C;input clock;output X;output Y;reg X; reg Y;always @(posedge clock) X <= A | B;always @(posedge clock) Y = B & C; endmodule
(C)module TestCircuit (A, B, C, clock, X, Y);input A;input B;input C;input clock;output X;output Y;reg X; wire Y;always @(posedge clock) X = A | B;always @(posedge clock) Y = B & C;endmodule
(D)module TestCircuit (A, B, C, clock, X, Y);input A;input B;input C;input clock;output X;output Y;reg X; reg Y;always @(posedge clock) X <= A+B;always @(B or C) Y = B * C;endmodule D X Y A B C clock