Verilog HDL主从触发器举例

主从D触发器的门级描述如下：

module MSDFF (D,C,Q,Qbar);
input D,C;
output Q,Qbar;

not
NT1 (NotD,D),
NT2 (NotC,C),
NT3 (NotY,Y);

nand
ND1 (D1,D,C),
ND2 (D2,C,NotD),
ND3 (Y,D1,Ybar),
ND4 (Ybar,Y,D2),
ND5 (Y1,Y,NotC),
ND6 (Y2,NotY,NotC),
ND7 (Q,Qbar,Y1),
ND8 (Qbar,Y2,Q);
endmodule